Outreach activities carried out by Research Institutions and Universities play a key role in bringing the public closer to scientific culture, and particularly, when aimed at younger audiences, in encouraging inspirations for STEM careers. In this context, numerous studies have highlighted that the most effective initiatives are those that allow students to immerse in the research setting and...
We report progress on the Heavy-Flavor Non-Relativistic Evolution (HF-NRevo) setup, a novel methodology to address leading-power fragmentation of hadrons containing one or more heavy quarks at moderate to large transverse momentum. As a first step, we focus on heavy quarkonia, building on Non-Relativistic QCD (NRQCD) next-to-leading-order calculations for all parton fragmentation channels to...
The particle-flow (PF) algorithm aims to provide a global event description for each collision in terms of the comprehensive list of final-state particles. It is of central importance to event reconstruction in the CMS experiment at the CERN LHC, and has been a focus of developments in light of planned high-luminosity running conditions with increased pileup and detector granularity. Existing...
The study of Higgs boson production in association with one or two top quarks offers a unique opportunity to probe the interactions between the two heaviest particles in the Standard Model. This talk presents measurements of key Higgs boson properties - specifically the production cross section and CP nature - in events produced via tH and ttH processes. The results are based on the full Run 2...
KM3NeT/ORCA is a water-Cherenkov neutrino telescope currently under construction at the depths of the Mediterranean Sea. Its primary goal is to study atmospheric oscillations and to determine the neutrino mass ordering. The detector consists of a three-dimensional array of strings, each equipped with 18 digital optical modules containing 31 photomultiplier tubes. At present, 24 out of the...
The production of an odd number of top quark events is necessarily suppressed in the SM, as it is mediated by the electroweak interactions, but naturally takes place in a number of BSM models, e.g. those involving FCNCs. As a consequence, the study of such processes is a promising tool in the search for new physics. We present a number of studies of such processes, including an observation of...
I present analytic results for the scale evolution of the first ten moments of the Parton Distribution Functions (PDFs) through four loops in QCD.
I discuss the evolution of the PDFs to approximate N${}^{3}$LO accuracy, which is constructed by using input from the computed moments and from physical constraints. The N${}^{3}$LO contributions are of the order of $1\%$ or less for...
The electron-positron stage of the Future Circular Collider (FCC-ee) provides exciting opportunities that are enabled by next generation particle physics detectors. We present IDEA, a detector concept optimized for FCC-ee and composed of a vertex detector based on DMAPS, a very light drift chamber, a silicon wrapper, a high resolution dual redout crystal electromagnetic calorimeter, an HTS...
Electric dipole moments (EDMs) of elementary particles violate time-reversal symmetry. According to the CPT theorem, this also implies the violation of combined charge-conjugation and parity-inversion (CP) symmetry, making EDMs powerful tools for probing physics beyond the current Standard Model (SM) of particle physics.
The muEDM experiment at PSI aims at setting the ground for a new...
The Pierre Auger Observatory has been on the astroparticle scene for over twenty years now. It's a mature player in this field, yet it retains all its vitality to provide data whose richness sheds light not only on the origin of ultra-high-energy cosmic rays (UHECRs), but also on high-energy hadronic interactions, multi-messenger astrophysics, beyond Standard Model (BSM) physics and...
We present a model that extends the electroweak gauge symmetry of the Standard Model in a non-universal way to $SU(2)_{L}^{\prime}\times U(1)_X \times SU(2)_{L}^{q_3}\times SU(2)_R^{\ell^3}$. This symmetry is spontaneously broken to $SU(2)_L\times U(1)_Y$ near the TeV scale by a condensate of a new composite sector. Charging appropriately the fermionic degrees of freedom of the composite...
The International Large Detector, ILD, is a detector concept for an experiment at a future high energy lepton collider. The detector has been optimised for precision physics in a range of energies from 90 GeV to about 1 TeV. ILD features a high precision, large volume combined silicon and gaseous tracking system, together with a high granularity calorimeter, all inside a central solenoidal...
The search for electric dipole moments (EDMs) remains one of the most sensitive probes of CP violation and physics beyond the Standard Model. In this talk, I will present results from lattice QCD calculations of the neutron EDM induced by the QCD $\theta$-term. I will also discuss hadronic matrix elements of CP-violating effective operators relevant to BSM scenarios—key theoretical inputs...
The HL-LHC upgrade of the ATLAS inner detector (ITk) brings an unprecedented challenge, both in terms of the large number of silicon hit cluster readouts and the throughput required for budget-constrained track reconstruction. Applying Graph Neural Networks (GNNs) has been shown to be a promising solution to this problem with competitive physics performance at sub-second inference time. In...
We discuss factorization of jet cross sections in heavy-ion collisions. First, using Glauber modelling of heavy nuclei, a factorized formula for jet cross sections is derived, which involves defining a virtuality-dependent jet functions in QCD medium. Then, we generalize the BDMPS-Z formalism to evaluate the jet function initiated by a parton with virtuality $m_I^2$. At the end, we disucss the...
Data analysis tasks are a key component of the International Olympiad on Astronomy and Astrophysics, a prestigious competition for high school students. Each participating country has its own selection process, open to students with an interest in Astronomy. Exam questions are an excellent way to introduce students to novel topics, provided the required knowledge to solve them is within the...
Precision measurements by AMS reveal unique properties of cosmic charged elementary particles. In the absolute rigidity range ~60 to ~500 GV, the antiproton flux and proton flux have nearly identical rigidity dependence. This behavior indicates an excess of high energy antiprotons compared with secondary antiprotons produced from the collision of cosmic rays. More importantly, from ~60 to ~500...
In the first part of the talk, we will introduce the main model building ideas, namely flavour non-universality and Higgs compositeness, that are central to our model, as well as the theoretical and experimental motivations for exploring these BSM avenues. In the second part of the talk, we present a flavour non-universal extension of the Standard Model combined with the idea of Higgs...
The top mass is one of the fundamental parameters of the SM and is of key importance for numerous phenomenological applications, thus requiring a precise and accurate determination. In this work, based on the NNPDF4.0 framework, we determine $m_t$ alongside the strong coupling $\alpha_s$, while faithfully propagating experimental and theoretical uncertainties. Traditional approaches often...
ALADDIN (An Lhc Apparatus for Direct Dipole moments INvestigation) is a new proposed compact fixed-target experiment at the LHC, which will enable a unique program of measurements of charm baryon electromagnetic dipole moments. The experiment relies on an innovative storage-ring layout capable of deflecting protons from the beam halo towards a solid target paired to a bent crystal where...
Precision measurements of top quark production cross sections are crucial for validating the Standard Model and investigating potential new physics. In this talk, we present both inclusive and differential measurements of top quark production in association with a photon or a W boson, using CMS data from 13 TeV pp collisions. Our results achieve improved precision, and we report, for the first...
Measurements of top-quark pairs in heavy-ion collisions are expected to provide novel probes of nuclear parton distribution functions as well as to bring unique information about the time evolution of strongly interacting matter. We report the observation of top-quark pair production in proton-lead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the LHC....
The Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino experiment filled with 20k tons of liquid scintillator (LS) and equipped with more than 40000 photosensors. It is designed to observe neutrinos and anti-neutrinos from various sources such as nuclear reactors, the Earth, atmosphere, the Sun and Supernovae. The detector construction was finished in 2024. It is...
Since 1983 the Italian groups collaborating with Fermilab (US) have been running a 2-month summer training program for Master students. While in the first year the program involved only 4 physics students, in the following years it was extended to engineering students. Many students have extended their collaboration with Fermilab with their Master Thesis and PhD.
The program has involved...
We present high-precision measurements of cosmic ray nuclei spectra spanning elements from Z=1 (protons) through Z=20 (calcium), and including Z=26 (iron) and Z=28 (nickel), as measured by the Alpha Magnetic Spectrometer. The analysis reveals new properties concerning both primary and secondary cosmic rays, with particular emphasis on their distinctive spectral structures. These findings...
An important part of the physics programme of the COMPASS experiment at CERN consists in the measurement of transverse spin and transverse momentum effects in Semi-Inclusive Deep Inelastic Scattering (SIDIS) of high energy muons off unpolarised and transversely polarised nucleons.
In this talk, the most relevant new results on SIDIS off unpolarised protons and transversely polarised deuterons...
The MUonE experiment at CERN has been proposed as a novel way to solve the muon anomaly puzzle, by a precise measurement of the differential cross section of the $\mu e$ elastic scattering. This can be obtained by using the intense 160 GeV SPS muon beam onto atomic electrons of a light target. The project has been developing in the last few years by tests of increasing complexity. The first...
AggiornaMenti is a national INFN project started in 2017 and devoted to the education of junior high-school science teachers. So far, about 800 science and technology teachers have attended our courses, in which they receive a practical training on how to propose a lecture based on hands-on activities with low-cost materials, which can be easily found at home. This, by the way, conveys the...
The discovery of the Higgs boson ten years ago and successful measurement of the Higgs boson couplings to third generation fermions by ATLAS and CMS mark great milestones for HEP. The much weaker coupling to the second generation quarks predicted by the SM makes the measurement of the Higgs-charm coupling much more challenging. With the full run-2 data and with the advent of ML flavour tagging...
We present the first observation of single top quark production in association with a W and a Z boson in proton-proton collisions using 13 and 13.6 TeV data recorded with the CMS detector corresponding to integrated luminosities of 138 and 61.9 fb-1, respectively. Events are selected if they contain three or four charged leptons, which can be electrons or muons. State-of-the-art machine...
The energy-loss of high-momentum jets, as they traverse the hot and deconfined quark-gluon plasma (QGP) produced in heavy-ion collisions, is one of the key observables used to characterize medium properties. In particular, the ability of the medium to dissipate the lost energy of the jet provides vital information on the transport properties of the QGP. The dissipative power of the medium can...
The Belle and Belle II experiment have collected a 1.2 ab$^{-1}$ sample of $e^+e^-\to B\bar{B}$ decays at a centre-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. The SuperKEKB collider is asymmetric, providing a boost to the $B$ mesons in the laboratory frame, so we can perform measurements of time-dependent $C\!P$ violation. Among the new results, we measure $CP$-violating...
A wide variety of searches for Supersymmetry have been performed by experiments at the Large Hadron Collider. In this talk, we focus on searches for Supersymmetric particles in events with missing energy signatures.
To enhance the scientific discovery power of high-energy collider experiments, we propose and realize the concept of jet-origin identification that categorizes jets into five quark species (u, d, s, c, b), five antiquarks, and the gluon. Using state-of-the-art algorithms and simulated ννH, H → jj events at 240 GeV center-of-mass energy at the electron-positron Higgs factory, the jet-origin...
Analysis of anisotropy of the arrival directions of galactic positrons, electrons and protons has been performed with the Alpha Magnetic Spectrometer on the International Space Station. This measurement allows to differentiate between point-like and diffuse sources of cosmic rays for the understanding of the origin of high energy positrons. The AMS results of the dipole anisotropy are...
Despite the success of perturbative QCD predictions in the high-energy regime, QCD itself remains mysterious at its nominal non-perturbative QCD scale. The LHC offers rich opportunities to probe the core of QCD related questions, by studying minibias events, double parton interactions, small-x and diffractive processes, as well as correlations in hadronization processes. This talk summarizes...
The Belle II detector at the SuperKEKB accelerator complex is covering a wide range of exciting physics topics. To achieve the project's research goals, a substantial increase of the data sample to 50 ab$^{−1}$ is needed, and for that, the luminosity has to reach the ambitious goal of $6 \times 10^{35}$ cm$^{−2}$ s$^{−1}$. The progress towards the design luminosity is accompanied by research...
The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area with connections to dark matter and the naturalness of the Higgs mass. The small production cross-sections and challenging experimental signatures, often involving compressed spectra, lead to difficult searches. This talk will highlight the most recent results...
The precise determination of the mass scale of (anti)neutrinos remains a fundamental open question in particle physics, carrying major implications ranging from sub-atomic physics to cosmological model.
The only model-independent approach to the measurement of neutrino mass is based on the analysis of the endpoint of beta or electron capture (EC) decay spectra, relying purely on kinematic...
Lab2GO is a project to establish a closer contact between school and experimental sciences created by the Istituto Nazionale di Fisica Nucleare (INFN) and the University of Rome "La Sapienza". The goal is the spread of laboratory practice among students and teachers in high schools. In this contribution two different experiences will be described. In the first case, a museum laboratory present...
Deep learning models are defined in terms of a large number of hyperparameters, such as network architectures and optimiser settings. These hyperparameters must be determined separately from the model parameters such as network weights, and are often fixed by ad-hoc methods or by manual inspection of the results. An algorithmic, objective determination of hyperparameters demands the...
$B$-meson decays into two vector mesons, $B \to VV$, constitute a class of decays of special interest. These decays are generally mediated by both loop and tree processes, making the measurement of their CP asymmetries, polarisation variables, and branching fractions especially interesting and challenging. For $B \to VV$ decays, any enhancement in one of those variables would be a hint for new...
Jets are essential hard probes for investigating the early-time dynamics and structure of the quark-gluon plasma in heavy-ion collisions. We develop an analytical framework for radiative energy loss in evolving media using resummation techniques, capturing both rare and multiple scattering regimes. Our results highlight the sensitivity of jet observables to early-time medium properties,...
We calculate several differential distributions for diffractive dijets production in ep → e′jet jet p in the perturbative QCD dipole approach using off diagonal unintegrated gluon distributions (generalized transverse momentum dependent distributions, GTMDs). We concentrate on the contribution from exclusive qq¯ dijets. Results of our calculations are compared to H1 and ZEUS data, including...
One of the open questions of astrophysics is the mass composition of ultra-high-energy cosmic rays (UHECRs). The flux of UHECRs is extremely low, demanding large observatories for indirect measurements of cosmic-ray air showers, cascades of secondary particles created by interactions of the cosmic ray with the atmosphere.
Located in Argentina, the Pierre Auger Observatory is the largest...
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. Naturalness arguments favour supersymmetric partners of the gluons and third-generation quarks with masses light enough to be produced at the LHC. With increasing mass bounds on more classical MSSM scenarios other...
The Forward Physics Facility (FPF) is a proposal developed to exploit the unique scientific potential made possible by the intense hadron beams produced in the far-forward direction at the high luminosity LHC (HL-LHC). Housed in a well-shielded cavern 627 m from the LHC interactions, the facility will enable a broad and deep scientific programme which will greatly extend the physics capability...
The need for constant, high-quality professional development for high school teachers (HST) has been widely recognized as essential to address society’s evolving needs and to motivate and retain teachers. This is particularly critical in STEM fields, where there is a shortage of educators alongside growing job opportunities outside the education system. As highlighted by OECD since 2005...
We consider an axion flux on Earth consistent with emission from the Supernova explosion SN 1987A. Using Chiral Perturbation Theory augmented with an axion, we calculate the energy spectrum of a+N→N+γ as well as a+N→N+π0, where N denotes a nucleon in a water tank, such as the one planned for the Hyper-Kamiokande neutrino detection facility. Our calculations assume the most general axion-quark...
In this talk we aim to summarize and give an overview of the status of heavy flavour related searches and measurements in CMS. The results will include analyses from rare decays, lepton flavour violation, and measurements of production cross sections.
We explore recent developments in the application of small-x resummation to parton distribution functions in the proton, with a particular focus on the gluon sector. In the first part, we provide a concise overview of small-x resummed one-dimensional collinear distributions, emphasizing their interplay with their three-dimensional transverse-momentum-dependent counterparts at both small and...
The CMS tracking system is the world’s largest silicon tracker, comprising 1856 pixel and 15148 strip modules. The silicon strip tracker features inner and outer barrel layers, inner discs, and endcaps, which close off the tracker on either end. In this poster, we present the performance of the silicon strip tracker during data taking in LHC Run 3, based on proton-proton collisions at the...
We present an updated determination of $\alpha_s(m_Z)$ based on the global NNPDF4.0 analysis at approximate N$^3$LO QCD mixed with NLO QED accuracy. Consistent results are obtained by means of two independent methodologies, both extensively validated using closure tests. We assess the perturbative convergence of our results, the role of QED corrections and the inclusion of a photon PDF, the...
We review linear e+e− colliders with a special focus on high centre-of-mass energies and beam polarisation, take a fresh look at the various accelerator technologies available or under development and, for the first time, discuss how a facility first equipped with a technology mature today could be upgraded with technologies of tomorrow to reach much higher energies and/or luminosities. In...
Froggatt-Nielsen models typically predict the existence of a light axion-like particle, pushing the new dynamic to a very high scale.
In this talk I will focus on models based on $Z_N$ discrete symmetries, which are counterexamples in which the new scale might in fact be much lower.
I will first chart the allowed parameter space from a set of theoretical considerations, and then focus on a...
Gamma-ray astronomy offers a unique window into the most extreme environments of the Universe, enabling the study of cosmic particle acceleration, high-energy emission mechanisms, and potential signatures of dark matter and fundamental physics. In recent years, the field has witnessed significant progress, driven by observations from space-based instruments such as Fermi-LAT and ground-based...
Particle production in heavy-ion collisions exhibits collective behavior known as collective flow, arising from the pressure-driven expansion of the quark-gluon plasma (QGP) formed in these collisions. Anisotropies in the azimuthal distribution of final-state particles can generate local vorticities in the QGP along the beam axis. Through spin-orbit coupling, these vorticities are expected to...
The Standard Model predicts several rare Higgs boson processes, including decays into a Z boson and a photon, a low-mass lepton pair and a photon, or a meson and a photon. Observing these rare decays would offer new and complementary insights into the Higgs boson's coupling structure beyond the more commonly studied channels. In addition, searches for lepton-flavor-violating decays of the...
This talk reports the result of the latest search for $\mu\to e\gamma$, which measured $1.3\times 10^{13}$ muon decays in the MEG II data collected in 2021-2022. A sensitivity of $2.2\times10^{-13}$ was achieved in this search, which is factor of 2.4 higher sensitivity than the previous experiment. In addition to the result, this talk discusses the status and prospect of the MEG II experiment,...
Since the beginning of Run 3 of LHC the upgraded LHCb experiment is using a triggerless readout system collecting data at an event rate of 30 MHz and a data rate of 4 TB/s. The trigger system is split into two high-level trigger (HLT) stages. During the first stage (HLT1), implemented on GPGPUs, track reconstruction and vertex fitting for charged particles is performed to reduce the event rate...
The top-quark mass is one of the key fundamental parameters of the Standard Model that must be determined experimentally. Its value has an important effect on many precision measurements and tests of the Standard Model. The Tevatron and LHC experiments have developed an extensive program to determine the top quark mass using a variety of methods. In this contribution, the top quark mass...
The tracking performance of the ATLAS detector relies critically on its 4-layer Pixel Detector, with a sensitive area of ~1.9 m2 and 92 million pixels. Its original part, consisting in 3 layers of planar pixel sensor is continuously operating since the start of LHC collisions in 2008, while Its innermost layer, the Insertable B Layer (IBL) at about 3 cm from the beam line, was installed in...
The strong coupling $\alpha_s$ is the most important parameter of Quantum Chromodynamics (QCD) and therefore it is essential to determine it with high precision. This work presents an improved approach for extracting $\alpha_s$ comparing numerical lattice QCD simulations to the perturbative expansion of the QCD color-singlet static energy. We "R-improve" the $\mathcal{O}(\alpha_s^4)$...
Entanglement is solely a quantum property and it can be extremely helpful to test the physics beyond the Standard Model in tabletop experiments with the advent of future quantum technologies. In this work, we provide an entanglement-based partial positive transpose (PPT) witness for Yukawa-type potentials in the infrared regime between pairs of neutral/charged particles in a spatial quantum...
Precision measurements of top quark properties are of paramount importance for our understanding of the SM. We present several measurements of asymmetries in top quark production and of its spin correlations. These measurements allow us to test the fundamentals of quantum mechanics at the highest energies achieved so far and also serve as an excellent probe for physics beyond the Standard Model.
Hypernuclei are bound states of nucleons and hyperons. The measurement of the production of hypernuclei with mass number A=3 and 4 in heavy-ion collisions is a powerful tool to investigate the hyper-nucleosynthesis mechanism. In the coalescence model, the production yields are sensitive to the interplay between the spatial extension of the nucleus wavefunction and the baryon-emitting source...
Rare kaon decays are among the most sensitive probes of both heavy and light new physics beyond the Standard Model description thanks to high precision of the Standard Model predictions, availability of very large datasets, and the relatively simple decay topologies. The NA62 experiment at CERN is a multi-purpose high-intensity kaon decay experiment, and carries out a broad rare-decay and...
The full set of data collected by CMS experiment at a centre of mass energy of 13 TeV allows searches for rare production modes of the Higgs boson, subdominant with respect the ones already observed at the LHC, by using a variety of decay modes profiting of the ones with largest expected branching fractions. We also discuss rare Higgs boson decay channel searches with the CMS experiment....
During LHC Run 3, the CMS experiment faced challenging pileup and high event rate conditions. To efficiently select events of interest for physics analysis or alignment and calibrations, the CMS collaboration utilises a two-tiered triggering system. This system consists of a firmware-based Level-1 Trigger (L1) and a software-based High Level Trigger (HLT) that runs in a computing farm. The L1...
The KM3NeT Collaboration is currently deploying two neutrino telescopes deep in the Mediterranean Sea. Both detectors share the same technology but are different in their size due to their different physics goals. The KM3NeT/ARCA telescope is located at about 3.5 km depth off-shore Sicily, Italy, while KM3NeT/ORCA is at about 2.5 km depth close to Toulon, France. The detectors are currently...
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures involving jets, which are difficult to reconstruct and for which estimating the background rates is also a challenge. These include emerging jets, semi-visible, and soft unclustered energy patters. The talk will focus on the most recent results from ATLAS
In order to fulfill the requirements of the high luminosity and hard radiation in HL-LHC, CMS is upgrading most of the sub detectors. In this talk, the current status of the phase-2 upgrade of CMS Inner and Outer Tracker detectors will be presented.
The pseudorapidity dependence of charged particle production provides information on the partonic structure of the colliding hadrons. It is especially interesting at LHC energies, as this observable is sensitive to the non-linear QCD evolution of the initial state. For the Run 3 of LHC, ALICE has upgraded its detectors, increasing its pseudorapidity coverage and tracking of charged particles...
The MAgnetized Disk and Mirror Axion eXperiment (MADMAX) is a future experiment aiming to detect dark matter axions from the galactic halo by resonant conversion to photons in a strong magnetic field. It uses a novel concept based on a stack of dielectric disks in front of a mirror, called booster, to enhance the potential signal from axion-photon conversion over a significant mass range. In...
The FCC-ee collider will deliver unparalleled sensitivity in Higgs boson decays, including couplings to quarks, gluons, and searches for invisible and rare decay modes. By employing advanced jet flavour tagging algorithms and exploiting a clean experimental environment, FCC-ee will measure the Higgs branching fractions to b, c, and gluon jets with sub-percent to few-percent accuracy. It will...
Results are presented on LF(U)V tests through precise measurements of decays involving heavy mesons and leptons, which are compared to the standard model predictions. The measurements use pp collision data collected by the CMS experiment at the LHC.
The determination of the QCD coupling, $\alpha_s$, from the analysis of inclusive hadronic tau decays is one of the most precise extractions of this fundamental parameter from experiment. For a long time, the analyses were based on the inclusive spectral functions determined by ALEPH and OPAL. These spectral functions rely on measurements of the dominant decay channels, but necessitated the...
During the LHC Run 3 data taking period, ALICE is reading out a factor of 600 more proton–proton collisions compared to Run 2, generating a data stream to the CERN T0 of over 30 GB/s — the highest among all LHC experiments. This dramatic increase was made possible through major upgrades to both the detector systems and the underlying data processing infrastructure.
The full data stream is...
Near the top quark pair production threshold, non-relativistic QCD predicts an enhancement of ttbar production in pseudoscalar states. Color-singlet contributions are expected to produce a distinct resonance just below the tt threshold, offering a unique testable signature at the LHC. In this talk, we present the first observation of such a contribution in the dileptonic final state. In...
The Pierre Auger Observatory, the largest air-shower experiment in the world designed to investigate ultra-high-energy (UHE, E $\gtrsim10^{17}\,$eV) cosmic rays, offers unparalleled sensitivity to UHE photons. These are expected from interactions of UHE cosmic rays with background radiation fields, as well as from more exotic scenarios such as the decay of super-heavy dark matter (SHDM)...
In the high-luminosity era of the Large Hadron Collider, the instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton-proton interactions in a typical bunch crossing. To cope with the resulting increase in occupancy, bandwidth and radiation damage, the ATLAS Inner Detector will be replaced by an all-silicon system, the Inner Tracker (ITk). The innermost...
Our work resolves a long-standing problem in particle physics: the inability for theory to agree with the spectrum of heavy-jet mass data, particularly at the Z-pole, leading to unreliable strong-coupling fits and exclusion of this high-quality experimental data. Our key theoretical improvements include high-precision large-log resummation in both the dijet and shoulder regions, a rigorous...
The COMET experiment searches for the coherent neutrinoless conversion of a muon to an electron in an aluminum atomic nucleus, a charged Lepton Flavor Violation process forbidden in the Standard Model. The experiment proceeds in two phases, with Phase-I aiming for a single event sensitivity of $3×10^{-15}$—improving the current limit by a factor of 100—using a high-intensity proton beam to...
Haloscopes are sensitive detectors used for dark matter axion search in the microwave energy range. They rely on the axion to photon conversion in a static magnetic field, and its amplification by resonance with a cavity electromagnetic mode. While simple cylinder cavities working below below 1 GHz can provide large volume detectors of typically a hundred liters or more (GrAHal-CAPP), searches...
The exceptionally large dataset collected by the ATLAS detector at the highest proton-proton collision energies provided by the LHC enables precision testing of theoretical predictions using an extensive sample of top quark events. This wealth of data has opened the door to new measurements of top quark properties including those particularly sensitive to the ttbar threshold region, such as...
The Belle and Belle II experiments have collected a 1.2 ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a centre-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to search for rare electroweak penguin $B$ decays and lepton-flavour-violating $B$ decays to final...
We investigate the renormalization group scale and scheme dependence of the $H \rightarrow gg$ decay rate at the order N$^4$LO in renormalization-group summed perturbative theory, which employs the summation of all renormalization-group accessible logarithms including the leading and subsequent four sub-leading logarithmic contributions to the full perturbative series expansion. The...
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures involving leptons or missing energy, which are difficult to reconstruct and for which estimating the background rates is also a challenge. These include displaced have neutral leptons, SUSY models involving displaced electron/muon pairs, heavy charged particles, and displaced vertices.. The talk...
One of the most effective techniques for investigating the mechanism of baryon production is the study of angular correlations between two particles. Angular correlations represent a convolution of various physical processes, such as mini-jets, Bose-Einstein quantum statistics, conservation of momentum, resonances, and other phenomena that contribute to the unique behavior observed for...
The High-Energy Particle Detector 01 (HEPD-01) is one of the payloads on board the China Seismo-Electromagnetic Satellite (CSES-01). CSES-01 was the first multi-channel space observatory of a series of planned missions devoted to monitoring perturbations in electromagnetic fields, plasma and charged particle fluxes induced by natural sources and artificial emitters in near-Earth space. It was...
The inner detector of the present ATLAS experiment has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). For the next LHC upgrade to High Luminosity, the particle densities and radiation levels will exceed the current levels by a factor of ten. The instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200...
In this talk, we revisit a class of lepton-flavor non-universal gauge extensions of the Standard Model that provide a compelling framework for generating neutrino masses and mixing angles via a high-scale seesaw mechanism, while ensuring exact proton stability to all orders in the effective field theory. This setup naturally accommodates minimal thermal leptogenesis, offering a robust...
We discussion an extension of the NNPDF4.0 parton distribution functions (PDFs) to approximate N$^3$LO. We assess the perturbative stability of the resulting PDFs and study the impact of missing higher order uncertainties, NLO QED corrections and the photon PDF, and we compare our results to the aN$^3$LO PDFs from the MSHT group. We present predictions for the total inclusive cross-section for...
The value of the strong coupling αS is determined in a comprehensive analysis at next-to-next-to-leading order accuracy in quantum chromodynamics. The analysis uses double-differential cross section measurements from the CMS Collaboration at the CERN LHC of inclusive jet production in proton-proton collisions at centre-of-mass energies of 2.76, 7, 8, and 13 TeV, combined with inclusive...
LUX-ZEPLIN (LZ) is a direct detection dark matter experiment located at the Sanford underground research facility in Lead, South Dakota, USA. LZ utilizes a dual-phase time projection chamber containing 7 tonnes of active xenon surrounded by veto systems to search for signals induced by WIMP dark matter candidates. Recently, the experiment announced world-leading WIMP results achieved over 280...
The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. This sample contains approximately 1.5 billion $e^+e^-\to \tau^+\tau^{-}$ events, which we use to search for lepton-flavour violating decays. We present searches for $\tau\to\ell\gamma$, tau decay to three charged leptons,...
The ATLAS experiment in the LHC Run 3 uses a two-level trigger system to select events of interest to reduce the 40 MHz bunch crossing rate to a recorded rate of up to 3 kHz of fully-built physics events. The trigger system is composed of a hardware based Level-1 trigger and a software based High Level Trigger. The selection of events by the High Level Trigger is based on a wide variety of...
Previous studies have shown that a class of observables for massless $e^+e^−$ colliders producing primary top quarks can be used to measure the top quark mass with a precision smaller than $\Lambda_{\rm QCD}$. The maximal sensitivity to the top mass is attained in the peak of the distribution, where several Effective Field Theories (EFTs) are applicable. The use of EFTs allows for the...
The Galactic plane is full of bright gamma-ray sources whose astrophysical nature remains unknown. The region surrounding the second most powerful pulsar in our galaxy, PSR J1813-1749, hosts one of such intriguing sources. Multiwavelength observations of this region show a multitude of sources, including a pulsar wind nebula (PWN) embedded in a supernova remnant (SNR) in X-rays and also SNRs...
The current Large Hadron Collider (LHC) data shows no clear indication of new physics yet and only incremental improvements are anticipated in the foreseeable future. LHC has been constraining TeV scale physics but new physics could be hiding below the electroweak scale. There are well-motivated dark matter models which predict a light mediator, coupled with Standard Model (SM) fermions and...
The Level-1 muon endcap trigger in the ATLAS experiment utilises signals from
the Thin Gap Chambers (TGCs) located in the outer muon stations. A significant
challenge for this system has been the high background rate caused by particles
not originating at the interaction point, which increased the Level-1 trigger
rate. To address this issue, the New Small Wheel (NSW) detectors, installed...
One of the main challenges in nuclear physics is studying the structure of the atomic nucleus. Recently, it has been shown that relativistic nuclear collisions at RHIC and the LHC can complement low-energy experiments. Relativistic nuclear collisions provide a snapshot of the nuclear distribution at the time of collisions, offering a precise probe of the nuclear structure.
In this talk, I...
Recent studies of high-energy inclusive Higgs boson hadroproduction rates, incorporating fixed-order N$^3$LO QCD corrections, have demonstrated that high-energy resummation effects can contribute up to 10\% at the nominal energies of the FCC. This finding underscores the importance of resummation physics for electroweak processes at 100 TeV. We present new predictions for rapidity and...
Due to their large mass, beauty quarks are always produced in hard-scattering processes, and hence their production can be computed with perturbative quantum chromodynamics (pQCD) calculations. The production cross section of beauty hadrons can be theoretically described with the factorisation approach as a convolution of the parton distribution functions of the incoming projectiles, the...
The ALICE Collaboration has proposed a completely new apparatus, ALICE 3, for the LHC Run 5 (LoI, arXiv:2211.02491). The detector consists of a large pixel-based tracking system covering eight units of pseudorapidity, complemented by multiple systems for particle identification, including silicon time-of-flight layers, a ring-imaging Cherenkov detector, a muon identification system, and an...
Understanding the scale dependence of parton distribution functions is vital for precision physics at hadron colliders. The well-known DGLAP evolution equation relates this scale dependence to the QCD splitting functions, which can be calculated perturbatively in terms of the anomalous dimensions of leading-twist gauge-invariant operators. The computation of the latter in general requires one...
The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) is set to begin survey operations by the end of this year.
This groundbreaking facility will transform our understanding of the universe across a broad range of science cases in optical astronomy. LSST will perform a comprehensive inventory of Solar System objects, including the identification of potentially hazardous...
The Scattering and Neutrino Detector at LHC (SND@LHC) is a compact, standalone experiment located in the TI18 tunnel, 480 meters downstream of the ATLAS interaction point, designed to observe neutrinos produced in LHC proton-proton collisions. The SND@LHC detector allows for the identification of all three flavors of neutrino interactions in the pseudorapidity region 7.2 < η < 8.4 within an...
The full exploitation of the physics potential of a multi-TeV muon collider will ultimately lie in the detector's ability to cope with unprecedented levels of machine-induced backgrounds.
This contribution introduces the MUSIC (MUon System for Interesting Collisions) detector concept and presents its performance in the context of $\sqrt{s} = 10$ TeV muon-antimuon collisions. The MUSIC...
The precision and reach of physics analyses at the LHC is often tied to the performance of hadronic object reconstruction & calibration, with any incremental gains in understanding & reduced uncertainties being impactful on ATLAS results. Recent refinements to the reconstruction and calibration procedures for jets & missing energy by the ATLAS collaboration has resulted in reduced...
The Electric Dipole Moment of the electron (eEDM) is typically investigated in experiments using paramagnetic molecules. However, the physical observable in these searches consists of a linear combination of CP-violating interactions, rather than the eEDM alone, which is commonly referred to as the equivalent EDM of the system. Assuming the presence of new CP-odd physics from heavy degrees of...
We update our combined analysis of D meson mixing and B decays sensitive to the CKM angle gamma including the latest experimental results. We derive constraints on absorptive and dispersive CP violation by combining all available data, and discuss future projections. We also provide posterior distributions for gamma and for the observable parameters appearing in D physics.
The quest for new physics is a major aspect of the CMS experimental program. This includes a myriad of theoretical models involving resonances that can decay to massive bosons, photons, leptons or jets. This talk presents an overview of such analyses with an emphasis on new results and the novel techniques developed by the CMS collaboration to boost the search sensitivity. The searches are...
The ePIC detector is designed as a general-purpose detector to enable the entire physics program of the future Electron-Ion Collider (EIC) at BNL, USA. A key feature will be particle identification (PID). A PID system covering a wide pseudorapidity range [-3.3, 3.5] is critical for accurately separating electrons from hadrons such as pions, kaons, and protons.
PID in the forward region will...
Hadronic object reconstruction & classification is one of the most promising settings for cutting-edge machine learning and artificial intelligence algorithms at the LHC. In this contribution, highlights of ML/AI applications by ATLAS to QCD and boosted-object identification, MET reconstruction and other tasks will be presented.
The measurement of the production of Higgs boson pairs (HH) at the LHC allows the exploration of the Higgs boson interaction with itself and is thus a fundamental test of the Standard Model theory and has a key role in the determination of the Higgs boson nature. The most recent results from the CMS collaboration on measurements of non-resonant HH production using different final states and...
The behaviour of the chiral condensate at finite temperature computed in AdS/QCD with a time-dependent background is shown. Two different scenarios are analysed: in the first a general power-law time dependence is assumed for the temperature, while in the second the energy-momentum tensor at late times reproduces the one found in viscous hydrodynamics. Depending on how quickly the temperature...
Production of multiple jets or bosons plus jets at the LHC offers an unprecedented opportunity to study QCD in the high-energy regime. As experimental precision advances, thorough QCD studies are enabled by measurements of a variety of different observables, including different topological configurations between vector bosons and jets, jet substructure observables, and heavy-flavor jets. In...
The Belle and Belle II experiments have collected a $1.6$ ab$^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons. We present measurements of charm-mixing parameters from flavour-tagged $D^0\to K^0_{\rm S}\pi^+\pi^-$ decays. Direct $C\!P$ violation...
This talk reviews recent measurements of multiboson production using CMS data at sqrt(s) = 13 and 13.6 TeV. Inclusive and differential cross-sections are measured using several kinematic observables.
The FASER experiment at the LHC is designed to search for light, weakly-coupled new particles, and to study high-energy neutrinos. The experiment has been running since 2022, and has collected nearly 200/fb of pp collision data. FASER has released several neutrino results including the first observation of electron and muon neutrinos at a particle collider, the first measurement of the muon...
Ultra-peripheral collisions enable a variety of two-photon and photonuclear interactions to be studied. Earlier analyses have mostly focused on exclusive photonuclear vector meson production and on two-photon interactions. This presentation will be on photonuclear interactions where the target nucleus breaks up. The cross sections for these interactions are huge in Pb-Pb collisions at the LHC....
Euclid is a mission of the European Space Agency designed to constrain the properties of dark energy and gravity via weak gravitational lensing and galaxy clustering. After its launch in July 1st, 2023 it is carrying out a wide area imaging and spectroscopy survey (the Euclid Wide Survey: EWS) in visible and near- infrared bands, covering approximately 15000 deg2 of extragalactic sky in six...
Though the Standard Model (SM) of particle physics has been a very successful theory in explaining a wide range of measurements, there are still many questions left unanswered such as incorporation of gravity into SM, neutrino masses, matter-antimatter asymmetry, supersymmetry, or existence of dark matter candidates. One of the possible solutions to address these challenges is the extension of...
The Apparatus for Mesons and Baryon Experimental Research (AMBER, NA66) is a high-energy physics experiment at CERN’s M2 beam line, with a broad physics program extending beyond 2032. It includes studies on: antiproton production cross-sections on protons, helium and deuterium; the charge radius of the proton, and Kaon and Pion PDFs via the Drell-Yan process.
As part of medium- and long-term...
We studied the diffractive photoproduction of $J/\psi$ mesons at the highest available energies.The data from ultraperipheral collisions (UPCs) are well described at high energies/small-$x$ after including additional shadowing from the $c \bar c g$ Fock state.
We confront our results on diffractive photoproduction of $J/\psi$ mesons with the putative gluon shadowing ratio defined as $R_g=...
Precision measurements of Drell-Yan processes, including on-shell and off-shell W- and Z-boson production, offer key input to improve the understanding of QCD and the accuracy of PDFs. In addition, Drell-Yan measurements are instrumental for precision measurements of fundamental electroweak parameters, such as W boson mass measurement. This talk summarizes recent results from ATLAS on this topic.
The LHCb experiment published the first observation of CP violation in the decay of charmed particles in 2019, using the decay channels $D^0 \to \pi^+\pi^-$ and $D^0 \to K^+K^-$. Additional measurements of $D^0$ mixing and of other decay channels are essential to understand whether this observation can be explained within the Standard Model, or if new sources of CP violation are needed. We...
Measurements of jet properties (such as the substructure or mass) in proton-proton collisions at the LHC are essential for precise tests of both perturbative and non-perturbative QCD, improving the understanding of proton structure and the strong interaction. In this presentation, we will present the latest measurements with jets performed using data collected by the CMS experiment.
The MEG II experiment at the Paul Scherrer Institute primarily aims to search for Physics beyond the Standard Model through the investigation of charged lepton flavor violation in the $\mu^+$ $\rightarrow$ $e^+ \gamma$ process.
However, it is also capable of searching for new particles.
We present a search for the X17, a hypothetical particle proposed to explain a resonant structure...
Euclid will observe 15000 deg2 of the darkest sky that is free of contamination by light from our Galaxy and our Solar System. Three “Euclid Deep Fields” covering around 40 deg2 in total will be also observed extending the scientific scope of the mission the high-redshift universe. The complete survey represents hundreds of thousands images and several tens of Petabytes of data. About 10...
The emergence of fully electric vehicles and autonomous systems (e.g., cars,drones), combined with advancements in long-distance power transmission (e.g.,satellites), has accelerated the development of wireless power transmission technologies. These technologies aim to address critical challenges such as reducing the reliance on extensive cabling and minimizing noise interference, especially...
Using light-front holographic QCD, we compute the pion mass, charge radius, decay constant, electromagnetic form factor and electromagnetic transition form factor. In doing so, we model the longitudinal quark dynamics using (1+1)-dimensional QCD-inspired potentials due to ’t Hooft and to Li & Vary. We explore the strong degeneracy between these two potentials and note that one scenario that...
Neural networks for LHC physics have to be accurate, reliable, and controlled. Using surrogate loop amplitudes as a use case, we first show how activation functions can be systematically tested with KANs. For reliability and control, we learn uncertainties together with the target amplitude over phase space. Systematic uncertainties can be learned by a heteroscedastic loss, but a comprehensive...
In this talk we present new measurements of inclusive and semi-inclusive jet production in pp collisions, using the high-statistics data sample of Run 3 collected by ALICE. The inclusive jet sample is composed of charged-particle jets, whilst the semi-inclusive sample has the additional constraint that the jets are recoiling from a high-pT charged hadron trigger. For the semi-inclusive sample...
We discuss Charged Lepton Flavour Violating (CLFV) signals in Inverse Seesaw (ISS) scenarios with 3+3 heavy sterile states and flavour and CP symmetries.
We distinguish between two options of these scenarios, each characterised by a different spectrum of the heavy sterile states and different forms of the couplings and mass matrices. For both options, different lepton mixing patterns are...
The High-Luminosity LHC (HL-LHC) is expected to deliver an integrated dataset of approximately 3 ab⁻¹, enabling detailed studies of Higgs boson processes with unprecedented precision. Projections based on current analyses have been performed to estimate the expected measurement accuracy and identify potential limitations. The large data sample will also significantly enhance sensitivity to...
The PADME experiment at the Frascati National Laboratory of INFN has performed a
search for the hypothetical X17 particle, by observing the product of the collisions
of the positron beam from the DAΦNE LINAC on a diamond fixed target.
The beam energy has been varied in the range
265–300 MeV, corresponding to values of √s between 16.4 and 17.5 MeV,
completely covering the the CoM...
We present a complete one-loop study of exclusive vector quarkonium photoproduction off protons in Collinear Factorisation (CF), including GPD evolution. The notoriously large scale instability of the cross section at high energies at next-to-leading order (NLO) is confirmed and resolved by resumming leading-logarithmic QCD corrections via High-Energy Factorisation (HEF) in the...
The direct detection of antimatter in cosmic rays is essential for understanding the mechanisms behind their acceleration and propagation, and serves as a powerful tool in the indirect search for dark matter. Traditionally, charge sign discrimination rely on magnetic spectrometers. However, these instruments are not ideal for extending measurements to higher energies in a short time frame. As...
We present a discussion of model-independent contributions to the EDM of the electron.
We focus on those contributions that can emerge from an extended heavy scalar sector, and in particular we explore the decoupling limit of the aligned 2HDM.
In this model, Barr-Zee diagrams with a fermion loop produce logarithmically-enchanced contributions that are proportional to potentially large...
It has been a long entertained idea that self-bound gravitons, so-called geons, could be a dark matter candidate or form (primordial) black holes. The development of viable candidates for quantum gravity allows now to investigate these ideas. Analytic methods show that the description of geons needs to be based on composite operators made out of the graviton field. We present results from a...
We present an extension of the Particle-flow Neural Assisted Simulations (Parnassus) framework to enable fast simulation and reconstruction of full collider events. Specifically, we employ two generative AI (genAI) approaches—conditional flow matching and diffusion models—to generate reconstructed particle-flow objects conditioned on stable truth-level particles from CMS Open Simulations....
We present a novel approach to calculate heavy meson lifetimes on the lattice. To tackle this long standing problem, we utilize gradient flow in combination with the short flow time expansion to nonperturbatively renormalize our lattice results and perform a perturbative matching to the $\overline{\textrm{MS}}$ scheme. This paves the way to circumvent challenges on the lattice such as mixing...
The Koba-Nielsen-Olesen (KNO) scaling of hadron multiplicity distributions, empirically confirmed to hold approximately in $e^+e^-$ collisions and Deep Inelastic Scattering, has been observed to be violated in hadron-hadron collisions. In this work, we show that the universality of KNO scaling can be extended to hadron-hadron collisions when restricted to QCD jets. We present a comprehensive...
The XENONnT detector, located at the INFN Laboratori Nazionali del Gran Sasso in Italy, is a leading experiment in the search for dark matter in the form of Weakly Interacting Massive Particles (WIMPs). It features a dual-phase time projection chamber with a 5.9-tonne liquid xenon active target, designed to detect rare particle interactions. Owing to its low background environment, the...
The Laser Und XFEL Experiment (LUXE), in planning at DESY Hamburg, is intended to study quantum electrodynamics (QED) in strong electromagnetic fields, and in particular the transition from perturbative to non-perturbative. In the non-perturbative regime, electron-positron pairs tunnel out of the vacuum in a manner akin to the Schwinger process. The experiment will make precision measurements...
The Next-to-Two-Higgs-Doublet model (N2HDM) has a rich vacuum structure where multiple electroweak (EW) breaking minima, as well as CP and electric-charge breaking minima, can coexist. These minima can be deeper than the electroweak vacuum $v_{ew} \approx 246\text{ GeV}$ of our universe, making our vacuum metastable. In such a case, one needs to calculate the tunneling rate from the EW vacuum...
The MEG II experiment, located at the Paul Scherrer Institute in Switzerland, operates with the highest continuous muon beam intensity currently achievable, reaching up to $10^8 \,\,\mu^+/s$. The MEG II experiment has been dedicated for several years to the search for the charged lepton flavour violating (cLFV) decay $ \mu^+\to e^+\gamma $, setting the world’s most stringent upper limits on...
The virtual corrections for $gg \to HH$ at NLO QCD have been efficiently approximated using a Taylor expansion in the limit of a forward kinematics. The same method has been recently applied to the calculation of a subset of the NNLO corrections, which are desirable given the significant impact, at NLO, of the uncertainty due to the choice of the top mass renormalization scheme. In this talk,...
The RICOCHET collaboration is currently building a neutrino observatory to measure with high precision the coherent elastic neutrino-nucleus scattering (CEνNS) of low-energy (< 10 MeV) reactor antineutrinos at the Institut Laue-Langevin (ILL) in Grenoble, France. Two separate cryogenic calorimeter technologies are being developed by the collaboration: the CryoCube is an assembly of germanium...
Particle flow reconstruction algorithms lay the foundation for physics analysis at collider experiments. Enhancing these algorithms with deep learning offers a unique opportunity to improve experimental sensitivity at the LHC and future facilities. In this talk, we present HGPflow, a deep learning approach based on hypergraphs that provides a physics-motivated framework for the energy...
The talk addresses the interplay of perturbative and non-perturbative physics in Monte Carlo (MC) generators.
We summarize the studies carried out so far within the TMD parton branching (PB) approach on the extraction of intrinsic transverse momentum (intrinsic-kt) from Drell-Yan (DY) predictions at different center-of-mass energies and in different ranges of invariant mass of the lepton...
The Belle and Belle II experiments have collected a 1.2 ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a centre-of-mass energy corresponding to the $\Upsilon(4S)$. The study of hadronic $B$ decays in these data allow the precise measurement of absolute branching fractions and angular distributions of the decay products. These measurements provide tests of QCD and allow the generation...
The detection of gravitational waves by the LIGO-VIRGO collaboration has marked a transformative era in astronomy, providing groundbreaking insights into the cosmos and creating new pathways for exploration. At the same time, advancements in the classical limit of quantum scattering amplitudes, particularly through the KMOC formalism, have enriched our understanding of compact binary systems....
Electron–positron annihilation into hadrons accompanied by an energetic photon provides a powerful tool to measure the hadronic cross-section across a broad energy range at high-luminosity flavour factories such as DAPHNE, CESR, PEP-II, KEK-B, SuperKEKB, and BESIII. The Monte Carlo event generator PHOKHARA has been widely used and simulates this process with next-to-leading order (NLO)...
Prompt photon production in pA collisions has long been suggested as a sensitive probe of the nuclear gluon density. In this study, we present recent results on another cold nuclear matter effect: fully coherent radiation induced by parton multiple scattering, which may affect the nuclear dependence of prompt photon production. Medium-induced radiation effects, implemented in leading-order...
The NuMI Off-Axis $\nu_e$ Appearance (NOvA) experiment is a long-baseline neutrino oscillation experiment primarily designed to study $\nu_e$, $\bar{\nu}_e$ appearance as well as $\nu_\mu$ and $\bar{\nu}_\mu$ disappearance in the energy range of $1 < E\nu < 4$ GeV. Interestingly, the NOvA far detector also records a non-negligible number of high-energy $\nu_e$ and $\bar{\nu}_e$ events in the...
A Tera-Z factory, such as FCC-ee or CEPC, will have indirect sensitivity to heavy new physics up to the tens of TeV scale through higher-order loop contributions to precision measurements at the Z-pole. These provide complementary sensitivity to potential deviations from the Standard Model typically thought to best be constrained at leading order at higher energies above the Z-pole, leading to...
The search for dark matter (DM) remains one of the most pressing challenges in modern physics. Detecting sub-GeV DM particles poses significant challenges for traditional Earth-based detectors due to their low collision energies. This talk presents a novel approach to overcome these limitations: blazar-boosted dark matter (BBDM). I will explore how active galactic nuclei (AGN) with jets...
The Deep Underground Neutrino Experiment (DUNE) is a next–generation, long–baseline and dual–site neutrino experiment. It will be composed of the most powerful muon–neutrino beam and two detectors: a near detector (ND) located at Fermilab and a far detector (FD) 1300 km apart at the Sanford Underground Research Facility (SURF). The chosen baseline and a 40–kt fiducial liquid argon mass will...
The results of the tau branching fraction fit performed by HFLAV (also reported in the PDG Review of Particle Physics) are used to update the Lepton Universality tests and to calculate Vus using tau measurements. The lepton universality tests that rely on the leptonic tau branching fractions are updated to the 2nd order QED radiative corrections, in preparation for future improved precision...
We present a comprehensive study of near-threshold structures in the J/\psi J/\psi mass spectrum using the fully reconstructed J/\psi J/\psi \rightarrow 4\mu final state, based on proton-proton collision data at \sqrt{s} = 13 and 13.6 TeV collected by the CMS experiment. With approximately four times more J/\psi pair candidates compared to the previous Run 2 dataset, the combined data sample...
We present two precision tools for the simulation of Higgs-pair
production via vector-boson fusion in the kappa framework for the
parameterization of non-standard Higgs couplings.
A new implementation of the process is developed in the framework of
the POWHEG-BOX program that can be used to provide predictions at the
next-to-leading order (NLO) of QCD matched to parton showers (PS).
In...
Recent algorithmic improvements have made it possible to numerically compute the value of subdivergence-free (=primitive=skeleton) Feynman integrals in $\phi^4$ theory up to 18 loops. By now, all such integrals up to 13 loops and several hundred thousand of higher loop order have been computed numerically. This data enables a statistical analysis of the typical behavior of Feynman integrals at...
A statistical combination of vector boson scattering processes is presented, based on proton-proton collision data at a center-of-mass energy of √s = 13 TeV, recorded by the CMS detector during Run 2 of the LHC and corresponding to an integrated luminosity of 138 fb⁻¹. The analysis includes both fully leptonic and semileptonic decay channels, covering same-sign WW, opposite-sign WW, ZZ, and WZ...
The Future Circular Collider electron-positron (FCC-ee) is designed as an electroweak, flavour, Higgs and top factory with unprecedented luminosities. Many measurements at the FCC-ee will rely on the precise determination of the vertices, measured by dedicated vertex detectors. All vertex detector designs use Monolithic Active Pixel Sensors (MAPS) with a single-hit resolution of ≈3 µm and a...
Fermionic asymmetric dark matter (ADM) can be captured in neutron stars (NS) via scatterings with the neutron star material. The absence of DM annihilations due to their asymmetric nature would thus lead to their accumulation in the NS core, which can exceed the Chandrasekhar limit to collapse into a black hole (BH), and provide exclusion limits from observations of neutron stars today. We...
Measurements of rare processes in the electroweak sector provide unprecedented constraints of the SM theory, and unique sensitivity to study the electroweak symmetry breaking (VBS processes) and the quartic boson self-couplings (VBS and triboson processes). In addition to cross-section measurements, studies of boson polarization states in VBS processes are being actively pursued to bring...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kiloton multi-purpose liquid scintillator (LS) detector located in South China. With detector construction complete in late 2024, JUNO is currently taking data during the liquid scintillator filling phase, and the operation with full liquid scintillator is expected in the second half of 2025.
JUNO’s primary goal is to determine the...
Measurement of the Higgs boson self interaction is one of the main goals at the high luminosity phase of LHC. A promising channel for this is the simultaneous production of two Higgs bosons from gluon-gluon fusion. For the interpretation of the measured data, a theoretical prediction of similar precision is needed. Following current projections this requires electroweak corrections at...
The LHCb experiment underwent a major upgrade in LHC Long Shutdown 2 and has been taking data in Run 3 at a five times higher instantaneous luminosity of 2 $\times$ 10$^{33}$ cm$^{-2}$ s$^{-1}$. The tracking detectors are all newly constructed and the particle identification detectors have been substantially upgraded with new frontend and backend electronics, allowing for the lowest level...
The precision measurements of the cosmic-ray positron and electron fluxes collected by the Alpha Magnetic Spectrometer on the International Space Station are presented. The positron flux exhibits complex energy dependence. It is described by the sum of a term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies, and a new source term, which...
Although the LHC experiments have searched for and excluded many proposed new particles up to masses in the TeV range, there are many scenarios that are difficult to address at a hadron collider. The linear collider facility, thanks to its staged running plan with different energy upgrade options, offers exciting new search possibilities. Reviewed in this talk are recent results, contributed...
Hyper-Kamiokande is a next-generation underground water Cherenkov detector currently under construction in Japan. Thanks to a fiducial volume more than eight times larger than that of the currently operating Super-Kamiokande, and enhanced detection capabilities, Hyper-Kamiokande is expected to significantly surpass the sensitivities of its predecessors, Super-Kamiokande and T2K.
The project...
The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ≃ 7.5 × 10^(34) cm^(−2)s^(−1) will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected. A High...
One of the LHC's priorities, following the discovery of the Higgs boson, is to observe the production of Higgs pairs and to measure the Higgs tri-linear coupling $\lambda_{3H}$.
Due to the rarity of di-Higgs production, measuring $\lambda_{3H}$ has proven to be highly challenging. Exclusion limits have been observed using a variety of approaches, including cut-based methods and boosted...
Perturbation theory is used extensively for solving problems in quantum mechanics and quantum field theory. In most cases, the perturbative series in powers of the coupling is an asymptotic series (it ultimately diverges). This is not an issue at weak coupling where one can make precise predictions by computing a few lower orders. However, this procedure fails completely at strong coupling. In...
Lepton flavour plays a crucial role in tests of the Standard Model and searches for New Physics. Within the Standard Model, the electroweak bosons couple universally to the three lepton families, differing only by mass effects (Lepton Flavour Universality, LFU) --- charged Lepton Flavour Violation (cLFV) is highly suppressed. However, several beyond-the-Standard-Model scenarios predict...
Observation of the electroweak production of four charged leptons and a photon, and first evidence at the LHC for the triboson process ZZγ with the fully leptonic decays of the Z-bosons using pp collision data collected by the CMS experiment during the LHC Run 2 at 13 TeV, corresponding to an integrated luminosity of 138 /fb.
BESIII has collected 20.3 and 7.33 $fb^{-1}$ of $e^+e^-$ collision data samples at 3.773 and 4.128-4.226 GeV, respectively. This provides a unique opportunity to investigate the non-perturbative nature of QCD in the charm sector.
In this presentation, we will discuss the recent progresses in amplitude analyses and branching fraction measurements of $D_{(s)}\to h h l^+ \nu$ and $h h h l^+ \nu$...
The ATLAS experiment at CERN is constructing upgraded system for the "High Luminosity LHC", with collisions due to start in 2030. In order to deliver an order of magnitude more data than previous LHC runs, 14 TeV protons will collide with an instantaneous luminosity of up to 7.5 x 10e^(34) cm^(-2)s^(-1), resulting in much higher pileup and data rates than the current experiment was designed to...
Future e$^+$e$^-$ colliders provide a unique opportunity for long-lived particle (LLP) searches. We present a full simulation study of LLP searches using the International Large Detector (ILD), a detector concept for a future Higgs factory, with a gaseous time projection chamber as its main tracking device. Signatures of displaced vertices and kinked tracks are explored. We study challenging...
The Pierre Auger Collaboration has performed a dedicated search for upward-going air showers using the Fluorescence Detector (FD), motivated by the two "anomalous" radio pulses reported by the ANITA experiment that are difficult to reconcile with expectations from the Standard Model. While ultrahigh-energy (UHE) neutrinos can traverse the Earth and initiate Earth-skimming showers interacting...
The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase 2 upgrade programme to prepare for the challenging conditions of the High-Luminosity LHC (HL-LHC). A new timing detector for CMS will measure minimum ionising particles (MIPs) with a time resolution of about 30-40 ps. The precise timing information from the MIP timing detector...
Long baseline neutrino oscillation experiments have a high sensitivity to the CP violation phase of the neutrino mixing matrix through the νμ → νe and ν̄μ → ν̄e appearance channels. For instance, the measurements of the T2K experiment in Japan, using Super-Kamiokande as a far detector, favour a close to maximal CP violation and excluded the CP conserving values at a 90% CL. However, these...
The DarkSide-20k detector, currently under construction at the INFN Gran Sasso National Laboratory in Italy, consists of a 51 tonne dual-phase Liquid Argon Time Projection Chamber aiming to directly detect GeV – TeV mass WIMPs. WIMPs are one of the most promising dark matter candidates, but no direct detection experiment has yet observed evidence sufficient to claim a WIMP discovery....
e+e- colliders operating at energies below the di-Higgs production threshold can provide information on the trilinear Higgs self-coupling lambda via its loop contributions to single Higgs production processes and electroweak precision observables. We investigate how well a non-SM value of lambda can be determined indirectly via its loop contributions to a global EFT fit. Using a doublet...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. While the 2021 update of its CDR [1] contemplated concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC followed by standalone...
Positivity bounds in effective field theories (EFTs) can be extracted through the moment problem approach, utilizing well-established results from the mathematical literature. We generalize this formalism using the matrix moment approach to derive positivity bounds for theories with multiple field components. The sufficient conditions for
obtaining optimal bounds are identified and applied to...
In this presentation, we'll discuss the recent measurements of the
cross-sections for e⁺e⁻ annihilation into hidden charm states at BESIII. These
measurements include: 1) A precise measurement of the e⁺e⁻ → π⁺π⁻ $h_c$cross section
line shape at center-of-mass energies from 4.009 to 4.950 GeV. A plateau-like shape
between 4.3 and 4.45 GeV, followed by a sharp drop near 4.5 GeV, reveals...
Semileptonic $b$-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model and searching for New Physics effects. The advantages of studying such decays include the large branching fractions and reliable calculations of the hadron matrix elements. Several SM features may be studied, such as the CKM parameters, the properties of $b-$hadron...
The MUonE experiment at CERN aims to determine the leading-order hadronic contribution to the muon g-2 by an innovative approach, using elastic scattering of 160 GeV muons on atomic electrons in a low-Z target. The method relies on the measurement of the hadronic contribution to the running of the QED coupling, $\Delta\alpha_{had}(t)$, which can be extracted from a precise measurement of the...
We calculate several types of commutators associated with the leptonic Yukawa coupling matrices in the canonical seesaw mechanism, which can be used to measure leptonic CP violation in both heavy Majorana neutrino decays and light Majorana neutrino oscillations in the flavor basis. The corresponding Jarlskog-like invariants of CP violation and their small non-unitarity effects are derived...
During Runs 1 and 2, the LHCb detector optimized its performance by stabilizing the instantaneous luminosity throughout each fill, adjusting the distance between the colliding beams using a hardware-based trigger system. In Run 3, the LHCb experiment underwent a major upgrade to accommodate a fivefold increase in luminosity, transitioning to a fully software-based trigger. A new luminometer,...
The direct pair-production of the superpartner of the $\tau$-lepton, the $\widetilde{\tau}$,
is one
of the most interesting channels to search for SUSY in:
the $\widetilde{\tau}$ is
likely to be the lightest of the scalar leptons,
and is one of the most experimentally challennging ones.
The current model-independent $\widetilde{\tau}$ limits come from LEP,
while limits obtained at the...
High-energy $\gamma\gamma$- and $e\gamma$-collisions offer a rich phenomenological programme, complementary to $e^+e^-$ collisions at a linear collider both in kinematic as well as physics reaches. In particular, $\gamma\gamma$ collisions offer a unique setting to investigate properties of the Higgs boson(s). High polarisation of the photon beams (produced via Compton back-scattering) can be...
We derive a family of generalized dispersion relations with new integration kernels, and use them to bootstrap the amplitudes with full unitarity and analyticity systematically employed. These dispersion relations, combined with the primal construction method, can be used to analyze the interplay between the Regge behavior of amplitudes and low-energy scattering data. As an illustrating...
Quarkonium production in high-energy proton-proton (pp) collisions provides a unique probe of both perturbative and non-perturbative aspects of quantum chromodynamics (QCD). Charmonium states, such as the J/ψ and ψ(2S), are produced through a two-stage process involving hard parton-parton scatterings followed by non-perturbative hadronization. Precise measurements are essential to constrain...
The Belle and Belle II experiments have collected a combined sample of 1.2~ab$^{-1}$ of $e^+ e^-\to B\bar{B}$ collisions at a centre-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment for studying semileptonic and leptonic decays of the $B$ meson. Combined with...
The LUX-ZEPLIN (LZ) experiment is a dark matter direct detection experiment operating almost a mile underground at the Sanford Underground Research Facility in Lead, South Dakota. LZ uses a 7 active-tonne dual-phase xenon time projection chamber primarily designed to detect weakly interacting massive particles (WIMPs), a well-motivated class of dark matter candidate. This talk will give the...
The Monitored Drift Tube Trigger Processor (MDT-TP) will improve the rate capabilities of the first-level muon (L0 Muon) trigger of the ATLAS Experiment during the operation of the HL-LHC.
The information of the trigger candidate, obtained by other muon trigger subsystems, will be combined with the precision of the MDT chambers in order to improve the resolution on the muon momentum...
Robust and precise Monte Carlo generators are paramount to the analysis of low-energy $e^+e^-$ scattering experiments at electron-positron colliders, which are essential for precision tests of the Standard Model, such as the dispersive evaluation of the hadronic vacuum polarization contribution to the muon $g−2$. As part of the community-driven initiative RadioMonteCarlow2, we aim to collect...
The POEMMA-Balloon with Radio (PBR) mission is a pathfinder project for the Probe Of Extreme Multi-Messenger Astrophysics (POEMMA), a proposed dual-satellite observatory designed to explore the highest energy regimes in the Universe. Scheduled for launch in Spring 2027 from Wanaka, New Zealand, PBR will fly aboard a NASA Super-Pressure Balloon for a mission duration of up to 50 days over the...
A meticulous determination of $\Delta m^2_{31}$ and $\theta_{23}$ is indispensable for accurately evaluating the Earth's matter effect in long-baseline experiments, a key element in resolving the neutrino mass ordering conundrum and in measuring the CP phase in the $3\nu$ paradigm. By reviewing the footprints of previous and ongoing experiments and considering the anticipated sensitivities...
Future Electron-Positron Linear Collider Designs (ILC, CLIC, HALHF) offer high-energy, polarized beams and high-precision measurements. In the talk we discuss the impact of polarized beams for the detection of the Higgs couplings, CP-violation effects and Dark Matter candidates with respect to the model distinction in different Beyond the Standard Models (MSSM, 2HDMS, inflation models). The...
Luminosity determination is a cornerstone of precision physics at the CMS experiment. In this talk, we present the latest luminosity measurements from CMS, covering both proton-proton and heavy ion collisions recorded during Run 2 and Run 3. Emphasis is placed on recent advances in reducing systematic uncertainties associated with the absolute luminosity scale from van der Meer scans, as well...
Accurately computing the decay rate of metastable vacua in quantum field theory hinges on a precise evaluation of functional determinants arising from quantum fluctuations. In this presentation, we explore recent advances in the regularisation and evaluation of these determinants. The first part introduces a streamlined method to regularize functional determinants for fields of spin 0, 1/2,...
The Future Circular Collider (FCC) is a post-LHC project aiming at direct and indirect searches for physics beyond the SM in a new 91 km tunnel at CERN. The abundant production of beauty and charm hadrons in the $8\times 10^{12}$ Z boson decays expected in e+e- collisions at FCC-ee offers outstanding opportunities in flavour physics with b and c hadron samples that exceed those available at...
Precise measurements of charm-hadron production in proton--proton (pp) collisions at the LHC are fundamental to test perturbative QCD-based calculations and to investigate the charm-quark hadronization. Recent measurements in pp collisions show baryon-to-meson ratios significantly larger than those in $\mathrm{e^+e^-}$ collisions, challenging the validity of theoretical calculations based on...
In recent years tantalizing signs for a novel phase have been reported that is chirally symmetric but nevertheless exhibits massive bound states. The necessary condition for such a phase, referred to as Symmetric Mass Generation (SMG), is the cancellation of all (continuous and discrete) 't Hooft anomalies. In 3+1 dimensions this occurs in systems containing a multiple of 16 massless Weyl...
We explore the prospects of exclusive $W^+W^-$ production via
photon-photon fusion at the LHeC, operating at a center-of-mass energy
of 1.2 TeV [1]. Utilizing the clean experimental environment and high
luminosity of the LHeC [2,3], this process could provide a powerful
probe of electroweak interactions and possible deviations from SM,
particularly through anomalous quartic gauge...
The LUCID-2 detector is the main luminometer of the ATLAS experiment and the only one able to provide a reliable luminosity determination in all beam configurations, luminosity ranges and at bunch-crossing level. During LHC Run-2 ATLAS has measured luminosity with a precision of 0.8%, the most precise ever among all experiments running at a hadron collider. LUCID-2 is now providing ATLAS with...
The Standard Model Effective Field Theory (SMEFT) is an essential tool for probing physics beyond the Standard Model. With New Physics signals remaining elusive, deriving constraints on SMEFT Wilson coefficients is increasingly important in order to pinpoint its low-energy effects. This talk presents comprehensive global fits of SMEFT under the Minimal Flavour Violation (MFV) hypothesis. We...
SMEFT Wilson coefficients are subject to various positivity bounds in order to be consistent with the fundamental principles of S-matrix. Previous bounds on dimension-8 SMEFT operators have been obtained using the positivity part of UV partial wave unitarity and form a (projective) convex cone. We implement UV unitarity conditions that go beyond positivity in an optimization scheme with...
The CMS Collaboration developed an end-to-end ML based simulation that can speed up the time for production of analysis samples of several orders of magnitude with a limited loss of accuracy. Detailed event simulation at the LHC is crucial for physics analyses and it is currently taking a large fraction of computing budget. Because the CMS experiment is adopting a common analysis level format...
We present a method to investigate the properties of solitonic cores in the Thomas-Fermi regime within the self-interacting scalar field dark matter (SI-SFDM) framework. Using semi-analytical techniques, we characterize soliton signatures through their density profiles, gravitational lensing deflection angles, and the excess of surface mass density in the context of strong lensing by galaxy...
“Physics on the Infinite Canvas” (“La Fresque des deux infinis” in French) is a fun, collaborative workshop based on collective intelligence, created in 2024 by physicists from CPPM and CPT. This original tool aims to popularize theoretical and experimental physics at both the infinitely small and the infinitely large scales. Its goal is to introduce major physics discoveries across these two...
SNO+ is a large multi-purpose neutrino detector located 2 km underground at SNOLAB, Canada, currently in operation filled with 780 tonnes of liquid scintillator as its target mass. The high light yield, low background levels, and continually increasing livetime, allow the SNO+ collaboration to perform measurements of solar neutrinos, antineutrinos from reactors and the Earth, and searches for...
NA61/SHINE is a multipurpose fixed-target experiment located at CERN SPS. Its research program includes studies of strong interactions as well as reference measurements for neutrino and cosmic-ray physics.
One of its main goals is to study the phase diagram of strongly interacting matter.
For this purpose, a unique two-dimensional scan in beam momentum 13A-150(8)A GeV/c and the system size,...
This spring, Fermilab's "Muon g-2" experiment is set to unveil its final results, targeting an unprecedented precision of 0.1 parts per million in measuring the muon's anomalous magnetic moment. To fully leverage this measurement in the quest for new fundamental physics, minimizing uncertainties in the Standard Model prediction is essential. This talk will review the various contributions to...
The neutrino experiment DUNE, currently under construction in the US, has a broad physics program that covers oscillation physics at the GeV scale, the search for proton decay and the observation of supernova and solar neutrinos. The DUNE far detector is based on liquid argon time projection chamber (LArTPC) technology, that allows for a 3D real-time position reconstruction of the events and...
Motivated by the long-standing discrepancy in lepton flavor universality ratios $R_D$ and $R_{D^{\ast}}$ we assess the status of scalar leptoquark states $R_2$, $\widetilde R_2$ and $S_1$ which can in principle provide a desired enhancement of $\mathcal{B}(B\to D^{(\ast )}\tau \nu)$ in a minimal setup with two Yukawa couplings only. We consider unavoidable low-energy constraints, $Z$-pole...
Transition Edge Sensors (TES) are widely employed in the field of quantum sensing due to their exceptional energy resolution and sensitivity to single quanta of energy. When operated in its superconducting transition at mK temperatures, a single photon absorbed by the TES produces a significant change in its resistance, generating a measurable signal. In particular, TESs are an ideal tool for...
In this talk, we present a recent lattice calculation of the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon, by the Budapest-Marseille-Wuppertal collaboration. Together with the hadronic vacuum polarization, this is the dominant source of uncertainty in the Standard Model prediction. We will compare our result with previous lattice calculations and...
The Tokai-to-Kamioka (T2K) experiment is a long-baseline neutrino experiment sited in Japan. T2K obtained results that disfavor the CP conservation with a 90% confidence level so far. The (anti)neutrino beam created at the J-PARC is characterized at the near detector before measuring neutrino oscillation parameters by the Super-Kamionde detector at 296 km away. Toward more precise measurements...
Art&Science Across Italy is a national project by INFN and CERN aimed at Italian high school students aged 16 to 18. Since its launch in 2016, more than 10,000 students have participated. The initiative is grounded in the idea that creativity and imagination are essential in both science and art. Scientists and artists alike are often called upon to look beyond what is immediately visible, to...
We present results from a global fit of dimension-six SMEFT operators
that includes electroweak, Higgs-boson, top-quark, and flavor
observables. The leading-order scale dependence of the SMEFT Wilson
coefficients is consistently included in the evolution from the UV
scale to the electroweak scale and the low-energy scale of flavor
observables. The global fit is obtained within the HEPfit...
A heavy quark-antiquark ($Q\bar Q$) pair can be produced in several pQCD processes, which impose different correlations between the $Q$ and $\bar Q$. Employing the recently advanced EPOS4HQ event generator, which contains these processes, we show that they explain the measured $D$$\bar D$ and $DD$ correlations and how they influence the $p_T$ distributions of open heavy flavor mesons in...
Transformers are the state-of-the-art model architectures and widely used in application areas of machine learning. However the performance of such architectures is less well explored in the ultra-low latency domains where deployment on FPGAs or ASICs is required. Such domains include the trigger and data acquisition systems of the LHC experiments.
We present a transformer-based algorithm...
There are still many open questions in understanding the nature of neutrinos, the most abundant matter particles in the Universe. Experimental neutrino physics is focused on measuring neutrino properties, such as absolute mass scale, the nature of neutrinos (Majorana or Dirac), and the possible violation of symmetries such as charge-parity and lepton-number conservation.
Neutrinoless...
Positron Sources for high luminosity high-energy colliders with at least a cms of 500 GeV are a challenge for all future lepton colliders as, for instance, the International Linear Collider (ILC), the Compact Linear Collider (CLIC) as well as new concepts as the HALHF collider design. In the talk new R&D developments for the undulator-based positron source are discussed. The talk includes...
We present results of searches for massive vector-like top and bottom quark partners using proton-proton collision data collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV. Single and pair production of vector-like quarks are studied, with decays into a variety of final states, containing top and bottom quarks, electroweak gauge and Higgs bosons. We search...
Recent measurements of the anomalous magnetic moment of the muon have challenged the Standard Model, producing significant tensions between theory and experiment. Accurate theoretical predictions are difficult due to the strongly interacting nature of QCD, which is the primary source of uncertainty in the Standard Model prediction for the muon g-2. In this talk, we present a lattice QCD...
The Deep Underground Neutrino Experiment (DUNE) is a next-generation, long-baseline neutrino oscillation experiment. Its primary goals include measuring the neutrino CP-violating phase, determining the neutrino mass ordering, and conducting a broad physics program, including studies of supernova neutrinos, low-energy interactions, and searches for physics beyond the Standard Model.
DUNE's far...
Despite the success of the Standard Model (SM) there remains behaviour it cannot describe, in particular the presence of non-interacting Dark Matter. Many models that describe dark matter can generically introduce exotic Long-Lived Particles (LLPs). The proposed ANUBIS experiment is designed to search for these LLPs within the ATLAS detector cavern, located approximately 20-30 m from the IP. A...
Neutrinoless double-beta decay (0νββ) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the Inverted-Ordering...
We will discuss the latest differential measurements of Higgs boson cross sections with the CMS detector in both bosonic and fermionic decay channels. Both fiducial, differential cross section measurements and measurements in the simplified template cross section framework will be presented. Both the data collected during Run 2 of the LHC and the early data collected in Run3 by the CMS...
The Phase-II Upgrade of the LHC will increase its instantaneous
luminosity by a factor of 7 leading to the HL-LHC era. At the HL-LHC, the number of proton-proton collisions in one bunch crossing, pileup, increases significantly, putting stringent requirements on the LHC detectors electronics and real-time data processing capabilities.
The ATLAS LAr calorimeter measures the energy of...
I will present our novel study of quarkonium-production at ultra-high transverse momentum at the LHC. We have performed a complete computation at NLO $(\alpha_s^3)$+ NLL $(\alpha_s^{n+1} \ln^n(p_T/m_H))$ using leading-power Fragmentation Functions (FFs). We have performed a thorough analysis of the theoretical uncertainties including those from the FF modelling, the scales...
The "Warning" project has reached its fifth edition this year. "Warning!" was born in 2020, when Pisa Foundation and the Pisa unit of the Italian Institute for Nuclear Physics (INFN) launched this initiative with the aim of developing interdisciplinary educational paths, on the topics of major planetary dangers and environmental fragility. This project was conceived as a knowledge...
Many new physics models such as compositeness, extra dimensions, extended Higgs sectors, supersymmetry, and dark sectors are expected to manifest themselves in the final states with photons and/or leptons. This talk presents searches in CMS for new phenomena in such final states, focusing on the recent results obtained using the full Run-II and Run-III data-set collected by the CMS Experiment...
This work achieves the first analytical determination of the three-loop hadronic vacuum polarization contribution to the muon's anomalous magnetic moment ($g−2$). Leveraging cutting-edge amplitude techniques within chiral perturbation theory, the effective field theory for low-energy QCD, we present this infinite volume calculation. Our result is crucial for accurately estimating finite volume...
The Hyper-Kamiokande experiment, currently under construction in Japan, is scheduled to complete its new Cherenkov far detector by 2027, with operations set to begin in 2028. This next-generation detector will be approximately eight times larger than its predecessor Super-Kamiokande, enabling a significant increase in statistical sensitivity—crucial for precise measurements of CP violation in...
The LHCb experiment has deployed machine learning and artificial intelligence models in its real-time data processing from the start of Run 1 datataking. Contrary to common fears when the LHC was starting up, these models have proven to not only be more powerful than "classical" alternatives but in many cases also more robust to changing detector performance. Their judicious use has also made...
In this talk, I will mainly discuss the neutrinoless double beta decay ($0\nu\beta\beta$) within the Left-Right Symmetric Model (LRSM), focusing on three critical aspects: (1) the enhancement or suppression of $0\nu\beta\beta$ rates in specific parameter spaces of new physics (NP) degrees of freedom, (2) constraints on NP parameters from current and future experiments, and (3) the impact of...
The future of particle physics is inseparable from the well-being, engagement, and career development of today’s early career researchers (ECRs) — the very scientists who will lead the field forward. Yet, many ECRs face structural challenges including short-term contracts, limited job security, under-recognition, and frequent relocations. These issues create uncertainty and threaten the...
While perturbative methods have led to significant insights into fundamental interactions,non-perturbative phenomena remain poorly understood—particularly in regimes where Monte Carlo (MC) techniques suffer from the sign problem, such as in dense nuclear matter and real-time dynamics in Quantum Chromodynamics (QCD). Tensor Network (TN) methods, which are not affected by the sign...
The Fermilab Muon $g-2$ Experiment is designed to measure the muon's anomalous magnetic moment, $ a_\mu = (g-2)/2 $ with a final accuracy of 140 parts per billion. This quantity is determined from two key measurements; the magnetic field and the difference between the muon's spin precession frequency and its cyclotron frequency, given by $\omega_a = \omega_s - \omega_c$, in a highly uniform...
The T2K experiment in Japan is a long-baseline neutrino oscillation experiment searching for the CP violation in the leptonic sector. To improve the precision of measurements in 𝛿CP terms, the Near Detector complex (ND280) has undergone a significant upgrade, which includes the installation of new High Angle Time Projection Chambers (HA-TPCs). These new HA-TPCs are required to provide 4π...
The e$^{+}$BOOST (intense positron source Based On Oriented crySTals) project aims to demonstrate the effectiveness of a novel fixed-target positron source scheme enhanced by coherent phenomena in crystals. Future lepton colliders such as FCC-ee, CLIC, and CepC require unprecedented positron beam intensities to achieve their respective luminosity goals.
Conventional positron...
Many theories beyond the Standard Model predict new phenomena, such as Z', W' bosons, KK gravitons, vector-like leptons or heavy leptons, in final states with isolated, high-pT leptons (e/mu/tau) or photons. Searches for new physics with such signatures, produced either resonantly or non-resonantly, are performed using the ATLAS experiment at the LHC.. The most recent ATLAS results will be reported.
Global interpretations of particle physics data within the framework of the Standard Model Effective Field Theory (SMEFT), including their matching to UV-complete models, involve energy scales potentially spanning several orders of magnitude. Relating these measurements among them in terms of a common energy scale is enabled by the Renormalisation Group Equations (RGEs). Here we present a...
The FORMOSA detector at the proposed Forward Physics Facility is a scintillator-based experiment designed to search for signatures of "millicharged particles" produced in the forward region of the LHC. This talk will cover the challenges and impressive sensitivity of the FORMOSA detector, expected to extend current limits by over an order of magnitude. A pathfinder experiment, the FORMOSA...
Equity, diversity and inclusion are vital for effective collaboration within an organisation like ATLAS, and the Early Career Scientists Board (ECSB) is an essential part of ATLAS's efforts in this area. The ECSB's mandate includes advising the administrative bodies of the ATLAS collaboration, gathering regular feedback, and proposing specific action items that improve early-career scientists'...
Muon identification is crucial for elementary particle physics experiments. At the Belle II experiment, muons and pions with momenta greater than 0.7 GeV/c are distinguished by their penetration ability through the $K_L$ and Muon (KLM) sub-detector, which is the outermost sub-detector of Belle II.
In this presentation, we will firstly discuss the possible room for $\mu/\pi$ identification...
MicroBooNE is a liquid argon time projection chamber (LArTPC) neutrino detector located along the Fermilab Booster Neutrino Beam and 8 degrees off-axis to the Neutrinos at the Main Injector beam. MicroBooNE collected data from both beams accumulating a large neutrino-argon scattering dataset with a mean neutrino energy of approximately 0.8 GeV. Understanding neutrino-argon interactions is...
The Fermilab Muon g-2 experiment is designed to determine the muon’s magnetic moment anomaly with an unprecedented precision of 0.14 parts per million (ppm). This anomaly is extracted from the ratio of the muon’s anomalous spin precession frequency within a magnetic storage ring to the magnetic field experienced by the ensemble of muons. However, the measured precession frequency is subject to...
We study the discovery potential of LHC experiments for resonantly produced vectorlike quarks ($\chi$), when the s-channel resonance is an ultraheavy diquark scalar particle ($S_{uu}$) of mass in the $7-8.5$ TeV range. Given that the $S_{uu}$ resonance can be reconstructed when both $W^+$ bosons decay hadronically, we focus on the 6-jet final state arising from the $pp \rightarrow S_{uu}...
Collider rings all around the world need to have several sensors all around the ring to operate. One kind of these sensors is the Beam Position Monitors (BPMs), that allows operators to measure if the beam travelling in their apparatus is well centered in the different magnets.
One specific category of BPMs, standing out by its very high aquisition rate, is called the Turn-by-turn BPMs...
Many-parameter fits to precise measurements in the framework of the Standard Model Effective Field Theory are becoming a standard interpretation of LHC and other collider data. In this contribution an overview is given of state-of-the-art EFT interpretations in ATLAS with particular emphasis on results in the top quark sector.
We present a new algorithm for tagging the production flavour of neutral $B^0$ and $B_s^0$ mesons in proton-proton collisions. It is based on a deep neural network, DeepSets, and exploits a comprehensive set of tracks associated with the hadronization process. The algorithm is calibrated on data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV. This inclusive approach...
The non-discovery of WIMPs at the LHC and the negative outcome of direct detection experiments have led to a steadily increasing interest in models with light dark matter. Models with a dark matter candidate that has a mass below the Lee-Weinberg bound can predict the right dark matter relic density if a new gauge interaction is introduced in addition to the dark matter candidate. The new...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. While the 2021 update of its CDR [1] contemplated concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC followed by standalone...
Monte Carlo integration lies at the heart of theoretical predictions in high-energy physics (HEP), underpinning the simulation of scattering processes at facilities like the Large Hadron Collider. However, as the complexity of target processes grows, classical methods rapidly become computationally demanding, consuming billions of CPU hours annually. In this talk, I will present a...
We describe how several highly correlated measurements of the muon precession frequency in magnetic field by multiple independent analysis groups were checked for consistency and averaged, for the final measurement of the muon magnetic anomaly by the FNAL muon g-2 experiment. With a significant improvement with respect to the past data analyses of the experiment, we planned the use of common...
We consider a NP scenario with a new heavy neutral gauge boson Z’ and the associated gauge symmetry U(1)’. The heavy Z’ gauge boson has flavour non-universal quark and lepton couplings fixed in a such a way that the gauge anomalies generated by the presence of an additional U(1)’ gauge symmetry cancel. This implies correlations between FCNC processes within the quark sector, within the lepton...
The production of charm quarks and charmonium states in fixed-target collisions provides a powerful probe of QCD in cold and hot nuclear matter. The LHCb experiment has pioneered a novel fixed-target program, now enhanced for Run 3 with the SMOG2 system, which features improved gas confinement and the capability to inject non-noble gases. This upgrade significantly increases fixed-target...
Time-integrated and time-dependent measurements of CP violation are important to test the Standard Model (SM) description. In particular, the tree-level determination of the CKM angle gamma is a standard candle measurement of CP violation in the SM. The latest CP violation measurements using beauty to open charm decays from LHCb are presented.
Measurements and observations in Particle Physics fundamentally depend on one's ability to quantify their uncertainty and, thereby, their significance. Therefore, as Machine Learning methods become more prevalent in HEP, being able to determine the uncertainties of an ML method becomes more important. A wide range of possible approaches has been proposed, however, there has not been a...
The electron-positron stage of the Future Circular Collider (FCC-ee) is aiming at direct and indirect searches for physics beyond the SM in a new 91-km tunnel at CERN. In addition, the FCC-ee offers unique possibilities for high-precision studies of the strong interaction in the clean environment provided by e$^+$e$^-$ collisions, thanks to its broad span of center-of-mass energies, ranging...
We analyze dark matter (DM) annihilation in a stabilised Randall-Sundrum (RS) model, where the radion—the lightest spin-0 Kaluza-Klein state—acts as a portal between DM and the Standard Model (SM).
By recasting limits from axion-diphoton couplings and collider searches for spin-0 resonances, we constrain the radion’s parameter space and demonstrate that Weakly Interacting Massive Particles...
Many new physics models predict the existence of resonant states decaying into two bosons, including the Higgs boson or new scalar S bosons. These processes provide crucial signatures in the search for physics beyond the Standard Model and may offer insights into the mechanism of electroweak symmetry breaking. In this talk, the latest results from searches for resonant Higgs boson pair (HH)...
Incorporating self-energy corrections via Dyson resummation can quantify the deviations from the fixed-width approximation, to an extent such that one can assess their implications on the myriad of collider observables. In this talk, I shall highlight the BSM reach of momentum-dependent particle widths and propagators of gauge and Higgs bosons, and the top quark using the SMEFT framework....
BESIII has collected 20.3 and 7.33 $fb^{-1}$ of $e^+e^-$ collision data samples at 3.773 and 4.128-4.226 GeV, which provide the largest dataset of $D\bar{D}$ and $D_sD_s$ pairs in the world, respectively.
We will present the measurement of branching fractions of fifteen $D_s^+$ hadronic decays using a global fit and highlight our recent advancements in amplitude analyses of $D^+ \to K_s \pi^+...
The aim of the LHCb Upgrade II is to operate at a luminosity of about 1.0 x 10$^{34}$ cm$^{-2}$ s$^{-1}$ to collect a data set of 300 fb$^{-1}$. The required substantial modifications of the LHCb electromagnetic calorimeter during Long Shutdown 4 (LS4) due to high radiation doses in the central region and increased particle densities are referred to as PicoCal. An enhancement of the ECAL in...
We investigate the phenomenological prospects of the Two Higgs Doublet and Complex Singlet Scalar Extension (2HDMS) in the context of dark matter (DM) and Higgs phenomenology. The 2HDMS provides an enlarged Higgs sector along with a DM candidate. In this work, we perform an exhaustive scan to find representative benchmarks which are consistent with all theoretical and experimental constraints....
We present searches from the CMS experiment, performed with data collected during LHC Run 2 at a centre-of-mass energy of 13 TeV, for additional Higgs bosons. A variety of states are searched for, at masses both above and below 125 GeV.
Calorimetry in the upcoming High Luminosity LHC (HL-LHC) era has two enormous problems, particularly in the forward direction: radiation tolerance and unprecedented in-time event pileup. To overcome these problems, the CMS Collaboration is getting ready to replace its current endcap calorimeters with a high-granularity calorimeter (HGCAL), featuring a previously unrealized transverse and...
The Belle II experiment collected a 19.2 fb$^{-1}$ sample of data at centre-of-mass energies near the $\Upsilon(10753)$ resonance. We present several results related to the following processes: $e^+e-\to \Upsilon(nS)\eta$, $e^+e-\to \gamma X_b(\chi_{bJ}\pi^+\pi^-)$, and $e^{+}e^{-}\to\chi_{bJ}(1P) \gamma$. These results provide additional information about the nature of the $\Upsilon(10753)$...
The Deep Underground Neutrino Experiment (DUNE) is a next generation neutrino oscillation experiment which will target the main outstanding questions of neutrino physics, including the neutrino mass ordering and the possibility of CP violation in the lepton sector. It will make use of a suite of 4x17kt large liquid argon (LAr) time projection chambers, located 1.5 km deep underground at SURF,...
We present recent measurements of event shape variables in proton-proton (pp) collisions with the CMS detector. Event shape variables provide insight into the final-state particle distributions, offering a detailed probe of the perturbative and non-perturbative QCD regimes.
We investigate the size of interference effects between resonant and non-resonant contributions to di-Higgs production in the singlet extension of the Standard Model, where the additional heavy scalar provides a resonant channel. We find these interference contributions to have a non-negligible effect on the cross-sections and differential distributions. In order to allow for a computationally...
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable of explaining some observations by itself. Many extensions of the Standard Model addressing such shortcomings introduce beyond-the-Standard-Model couplings to the Higgs...
Determination of the nature of dark matter is one of the most fundamental problems of particle physics and cosmology. This talk presents recent searches for dark matter particles from the CMS experiment at the Large Hadron Collider in mono-X signatures.
The Short-Baseline Near Detector (SBND) is one of the Liquid Argon Time Projection Chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, and is the near detector in the Short-Baseline Neutrino (SBN) Program. The detector completed commissioning and began taking neutrino data in the summer of 2024. SBND is characterized by superb imaging...
The High Luminosity upgrade of the LHC (HL-LHC) at CERN will provide, starting in 2030, unprecedented instantaneous and integrated luminosities of around 5 x 10^34 cm-2 s-1 and 3000/fb, respectively. The expected average of 140 to 200 collisions per bunch-crossing (pileup) represents a severe challenge for the detectors. While the endcap part of the calorimeters will be replaced by a new...
The Breit frame provides a natural frame to analyze lepton--proton scattering events. In this reference frame, the parton model hard interactions between a quark and an exchanged boson defines the coordinate system such that the struck quark is back-scattered along the virtual photon momentum direction. In Quantum Chromodynamics (QCD), higher order perturbative or non-perturbative effects can...
Extra light scalars are still not excluded by the existing experimental constraints, provided their coupling to the SM gauge bosons is sufficiently suppressed. They could be produced at the e$^+$e$^-$ Higgs factory in a scalar-strahlug process, analogous to the Higgs-strahlung process being the dominant production channel for the 125 GeV Higgs boson. This was selected as one of the focus...
BESIII has recently accumulated a large data sample at the $\psi(3770)$ energy point corresponding to an integrated luminosity of 20 $fb^{-1}$. The neutral $D \bar{D}$ pairs produced at $\psi(3770)$ are in a C-odd correlated state, providing a unique laboratory to measure the strong-phase differences between $D^0$ and $\bar{D}^0$ decays. These parameters are essential inputs to CP violation...
Quarkonium production has long been identified as one of the golden probes to study the quark-gluon plasma (QGP). In fact, the early production of heavy quarks ($c\bar{c}$ and $b\bar{b}$) makes charmonia an ideal tool to investigate the evolution of the hot and dense medium produced in ultra-relativistic heavy-ion collisions. On the one hand, the production measurements and the...
The BESIII experiment is taking data at a symmetric $e^+e^-$ collider operating at the center of mass energies from 2.0 to 4.95 GeV. With the world’s largest on-threshold production data set of $J/\psi$ (10 billion), $\psi$(3686) (2.6 billion), and 20 $fb^{-1}$ of $\psi(3770)$ decaying into D meson pairs, we are able to search for various dark sectors particles produced in $e^+e^-$...
We present the latest population-level results from the LIGO-Virgo-KAGRA (LVK) Collaboration, based on the growing catalog of gravitational-wave detections from compact binary coalescences. Leveraging data from the O1–O3 observing runs, and incorporating advanced statistical inference techniques, we explore the underlying astrophysical distributions of binary black holes (BBHs), binary neutron...
The FoCal is a high-granularity forward calorimeter to be installed as an ALICE upgrade during the LHC Long Shutdown 3 and take data in Run 4.
It will cover a pseudorapidity interval of $3.2 < \eta < 5.8$, allowing to explore QCD at unprecedented low Bjorken-$x$ of down to $\approx 10^{-6}$ -- a regime where non-linear QCD dynamics are expected to be sizable.
The FoCal consists of a compact...
The ICARUS Collaboration is now entering its fifth year of continuing operations of the 760-ton liquid argon T600 detector. The T600 was overhauled at CERN after operations at the LNGS underground laboratory in Italy and moved to its present location at FNAL - as part of the Short-Baseline Neutrino (SBN) program - where it successfully completed its commissioning phase in June 2022. At FNAL...
The rare decay process $H \to Z \gamma$ has been investigated by both the ATLAS and CMS collaborations, with both reporting an event excess characterized by $\mu = 2.2 \pm 0.7$. This anomaly was initially attributed to potential modifications of the $HZ\gamma$ vertex. However, since the $H \to Z \gamma$ signal is reconstructed via the $H \to \ell \ell \gamma$ channel, background...
Heavy quarks (charm and beauty) are useful probes for investigating the properties of the quark-gluon plasma (QGP) generated in ultra-relativistic heavy-ion collisions. Their participation in the collective motion of the medium can be assessed by measuring the prompt and non-prompt charm-hadron elliptic-flow coefficient $v_2$, originating from the initial-state spatial asymmetry in non-central...
The H1 Collaboration at HERA reports the first measurement of groomed event shape observables in deep inelastic electron-proton scattering (DIS) at $\sqrt{s}=319$ GeV, using data recorded between the years 2003 and 2007 with an integrated luminosity of 351 pb$^{-1}$. Event shapes provide incisive probes of perturbative and non-perturbative QCD. Grooming techniques have been used for jet...
Benefiting from the clean experimental signature of dimuon detection, the LHCb experiment collects large samples of beauty hadron decays to charmonium. This allows for precise measurements of key properties such as branching fractions, lifetimes, and CP violation. In this work, we present the latest LHCb results on these decays, with a particular focus on CP violation and branching ratio measurements.
Neural Simulation-Based Inference (NSBI) is a powerful class of machine learning (ML)-based methods for statistical inference that naturally handle high dimensional parameter estimation without the need to bin data into low-dimensional summary histograms. Such methods are promising for a range of measurements at the Large Hadron Collider, where no single observable may be optimal to scan over...
The proposed LUXE experiment (LASER Und XFEL Experiment) at DESY, Hamburg,
using the electron beam from the European XFEL, aims to probe QED in the
non-perturbative regime created in collisions between high-intensity laser
pulses and high-energy electron or photon beams. This setup also provides a unique opportunity to probe physics beyond the standard model. In this talk we show that by...
Recent CMS results on production of heavy hadrons is presented, including the measurement of total charm cross section in pp collisions at 7 TeV and the observation of simultaneous production of Y(1S) meson and Z boson in pp collisions at 13 TeV.
A detailed study exploiting novel trigger and reconstruction techniques developed to search for Beyond Standard Model (BSM) Long-Lived Particles (LLPs) with very displaced vertices is presented. Building on feasibility studies that have successfully reconstructed Standard Model decays occurring up to 8m forward of the interaction point in LHCb’s magnet region, the search for LLP particles into...
Several theories beyond the Standard Model predict the occurrence of Domain Walls (DW), topological defects expected to arise from the breaking of a discrete symmetry in the early universe. The motion and the eventual annihilation of these objects are expected to generate a stochastic background of gravitational waves (SGWB), that could in principle be probed by ground-based GW detectors. In...
We investigate a novel collider signature within the minimal Left-Right Symmetric Model, featuring a Higgs sector composed of a bi-doublet and two triplets. Our study focuses on a region of the parameter space where the $SU(2)_R$ charged gauge boson $W_R$ lies in the multi-TeV regime (3-100 TeV) and the additional Higgs states play a significant role. In this scenario, a heavy neutral Higgs...
Although suggested by cosmological and astrophysical observables, no dark matter candidate has been observed to date. Potential mediators between the visible and dark sectors are receiving more and more attention since they offer the opportunity of discovering the nature of dark matter at collider experiments. The LHCb experiment, originally built for $b$- and $c$-physics, has proven to be...
MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) at Fermilab. The detector, which has an excellent calorimetric, spatial and energy resolution, has collected beam data from two different beamlines between 2015 and 2020, as well as cosmic ray data when no neutrino beam was running. These characteristics make MicroBooNE a powerful detector not just to explore...
Experimental verification of the Higgs trilinear self-coupling is one of the next major challenges of particle physics. While prospects from proton-proton collisions have centred around measuring the on-shell single- and di-Higgs production processes, the off-shell Higgs production process has also been suggested as a complementary channel to resolve the degeneracy in Higgs couplings. We...
This talk will present recent results from the ATLAS experiment on measurements of the production of charmonium states and studies of heavy-flavour states spectroscopy, including that of exotic quarkonium.
A general two Higgs doublet model (G2HDM) is adopted to study
$pp \to b H^\pm \to b b c +X$ at the Large Hadron Collider (LHC),
where $H^\pm$ is a charged Higgs boson,
$b$ represents a bottom quark or an anti-bottom quark,
and $c$ is a charm quark or an anti-charm quark.
In two Higgs doublet models with Type-II Yukawa interactions,
$g_{H^+ bc}$ is suppressed by $V_{cb} \simeq...
The computation of higher-order corrections to cross-sections relevant at LHC involves the evaluation of phase-space integrals that exhibit soft and collinear divergences. The subtraction of these divergences is a key ingredient to obtain fully-differential predictions for physical observables. We discuss a subtraction method to handle these divergences based on the construction of universal...
The Belle and Belle II experiments have collected a $1.6 \mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons and baryons. We present searches for rare flavour-changing neutral current processes and measure several radiative decays of...
Measurements of heavy baryon production in pp, pA and AA collisions from RHIC to top LHC energies have recently attracted more and more attention, currently representing a challenge for the heavy-quark hadronization theoretical understanding. In such experiments there have been many indications of the formation of a deconfined phase of quarks and gluons called the quark-gluon-plasma (QGP)....
The effect long wavelength cosmological perturbations (soft cosmological modes) can be captured analytically by solution-generating techniques based on large gauge diffeomorphism. This enable one to construct exact solutions of the linearized Einstein equations which described a perturbed FLRW background up to some given order in the multipole expansion of the cosmological perturbations. In...
Exotic Higgs decays are among the most promising areas to be explored at the High-Luminosity LHC, given the unprecedentedly large amount $(\sim 3 \times 10^8)$ of 125 GeV Higgs bosons that will be produced. In this context, we propose a new search channel for which the Higgs boson decays to a (leptonically decaying) $Z$ boson and a light BSM pseudoscalar $a$, which subsequently decays to a...
The Belle and Belle II experiment have collected samples of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These data have constrained kinematics and low multiplicity, which allow searches for dark sector particles in the mass range from a few MeV to 10 GeV. Using a 365 fb$^{-1}$ sample collected by Belle II, we search for inelastic dark matter and an...
Accurate modeling and understanding of quarkonium production in AA collisions requires a formalism that preserves the quantum properties of a microscopic $Q\bar{Q}$ system while treating the interaction of such pairs with the QGP. The open quantum system approach has recently emerged as one of the most fruitful schemes to meet such requirements. However, the quantum master equations obtained...
This talk will present the recent results from ATLAS experiments on open-charm meson production measurements and various studies of b hadron decays, including the most precise measurement of the $B^0$ lifetime.
Motivated by the recent observations of $T^*_{cs0}(2870)^0$, $T^*_{c\bar s 0}(2900)^0$ and $T^*_{c\bar s 0}(2900)^{++}$ charmed tetraquark states by LHCb, we study the decays of heavy mesons to these charmed tetraquark states ($T$) using a topological amplitude approach. We first obtain the $T\to DP$ and $DS$ strong decay amplitudes by decomposed them into several topological amplitudes, where...
Deep-inelastic positron-proton scattering at high momentum transfer $Q^2$ is an ideal place to study QCD effects. The H1 collaboration presents two such studies based on data collected in ep collisions at $Q^2>150$ GeV$^2$. The data are unfolded (corrected for detector effects) using advanced machine learning methods. This results in parallel and unbinned measurements of several observables,...
The deflection of light in the gravitational field of the Sun is one of the most fundamental consequences for general relativity as well as one of its classical tests first performed by Eddington a century ago. However, despite its center stage role in modern physics, no experiment has tested it in an ostensibly quantum regime where both matter and light exhibit non-classical features. This...
Neutrinoless double beta decay (0$\nu\beta\beta$) is a rare process which could take place if neutrinos are Majorana fermions. Its discovery would not only shed light on the nature of neutrinos, but would also provide unambiguous evidence for the existence of new Physics Beyond the Standard Model, as it entails a two unit lepton number violation.
The LEGEND Experiment (Large Enriched...
Within the framework of a general non-linear effective field theory describing the electroweak symmetry breaking, we perform a detailed analysis of the next-to-leading contributions to the electroweak oblique parameters S and T from hypothetical heavy resonance states strongly coupled to Standard Model fields. This work extends our previous results by including parity-odd operators in the...
The planned Electron Ion Collider will be a unique, high-luminosity, high-precision accelerator to yield collisions of electrons and protons/nuclei. The ePIC experiment will be the first general-purpose detector planned for EIC. It will cover a wide area in $x - Q^{2}$ plane at different center of mass energies. Low-$x$ physics are going to be central to the EIC mission of probing gluon...
The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino-oscillation experiment aiming to measure CP-violation and the neutrino mass ordering. The far detector consists of four 17-kt modules based on Liquid Argon Time Projection Chamber (LArTPC) technology. The first and second DUNE modules technology are being tested with large scale prototypes (ProtoDUNE) at the CERN...
We compute the causality/positivity bounds on the Wilson coefficients of scalar-tensor effective field theories. Two-sided bounds are obtained by extracting IR information from UV physics via dispersion relations of scattering amplitudes, making use of the full crossing symmetry. The graviton t-channel pole is carefully treated in the numerical optimization, taking into account the constraints...
T2K is a long-baseline neutrino oscillation experiment in Japan, featuring SuperKamiokande as a far detector and a near detector complex. The primary near detector, ND280, has recently undergone an upgrade, incorporating three new sub-detectors: the SuperFGD (SFGD), two High-Angle TPCs (HATs), and a Time-Of-Flight (TOF) system.
In this poster, we present the TOF detector, which consists of...
Lattice simulation of QCD at small net baryon densities and high temperature have revealed that the transition to hadronic phase to the deconfined quark-gluon plasma is a crossover. Recently, the structure of neutron stars have been studied with a crossover equation of state by means of a switching function to model a smooth transition from a pure neutron matter to massless quarks. The switch...
The ICARUS-T600 liquid argon time projection chamber (LArTPC) detector is taking data at shallow depth as the far detector of the Short Baseline Neutrino (SBN) program at Fermilab, to search for a possible sterile neutrino signal at $\Delta m^{2} \approx 1~\text{eV}^{2}$ with the Booster (BNB) and Main Injector (NuMI) neutrino beams at $\sim 0.8 \ \text{GeV}$ and $\sim 2 \ \text{GeV}$ average...
Domain walls are a type of topological defect that can arise in the early universe after the spontaneous breaking of a discrete symmetry. This occurs in several beyond Standard Model theories with an extended Higgs sector, such as the Next-to-Two-Higgs-Doublet model (N2HDM). In this talk, I will discuss the domain wall solution related to the singlet scalar of the N2HDM as well as demonstrate...
The study of the Quark-Gluon Plasma (QGP), a deconfined state of nuclear matter, remains a central focus of high-energy heavy-ion collision experiments. Light-flavor hadrons act as essential probes of the QGP, offering insights into its bulk properties. In particular, the pseudorapidity density of charged particles, which reflects the energy density achieved in such collisions, serves as a key...
Hadronic resonances are crucial probes to understand the various phases of matter created during relativistic heavy-ion collisions. Due to their short lifetimes, the yields of these resonances can be affected by competing rescattering and regeneration mechanisms in the final hadronic phase. Rescattering can alter the momentum of the resonance decay products, limiting their reconstruction...
Despite the success of the Standard Model (SM) there remains behaviour it cannot describe, in particular the presence of non-interacting Dark Matter, which composes a significant fraction of the Universe’s matter. Many models that describe dark matter can generically introduce exotic Long-Lived Particles (LLPs). The proposed ANUBIS experiment is designed to search for these LLPs within the...
Relativistic heavy-ion collisions create a hot, dense state of QCD matter called Quark–Gluon Plasma (QGP). In ultra-central collisions, the QGP volume saturates and remains constant; instead, entropy fluctuations cause temperature variations in the system. This property can be probed by measuring the correlation between the average transverse momentum (⟨$p_{\rm T}$⟩) and the multiplicity of...
The SND@LHC experiment is designed to study neutrinos produced in proton-proton collisions at the LHC, covering an energy range from 100 GeV to 1 TeV. It explores an unexplored pseudo-rapidity region of 7.2 < η < 8.4. The compact detector is positioned 480 meters downstream from the ATLAS Interaction Point (IP1) in the TI18 tunnel. Its setup includes a veto system, a tungsten target...
Recent PP collisions at the highest available LHC energies (at 13 TeV CM energies) are performed with such a high luminosity, when the detected multiplicity dependence can be observed by high precision and its microscopical origin can be studied and discussed. Indeed, the measured hadron transverse momentum spectra differ at lower and higher final state multiplicities, which offers the...
NvDEx (No Neutrino Double beta decay Experiment) is a Se TPC detector that will be located in China Jinping Underground Laboratory (CJPL), looking for neutrinoless double beta decays. In this talk, I will present the current status of the experiment and the prospects for future developments. The first phase of the experiment will be NvDEx-100, using 100 kg of SeF$_6$: due to the large...
A search is presented for non-resonant Higgs boson pair production decaying to multi-lepton final states using 140 fb-1 of proton-proton collision data at centre-of-mass energy 13 TeV, recorded with the ATLAS detector during Run 2 of the LHC. By combining nine distinct channels characterized by varying multiplicities of electrons, muons, taus, and photons, this analysis represents a novel and...
Femtoscopic correlations between hadrons provide valuable insight into the short-range dynamics of hadronic interactions, with significant implications for fundamental physics and astrophysical phenomena. The composition of neutron stars depends on the interplay between two- and three-body forces involving nucleons and hyperons. Knowledge about the latter is scarce, mainly derived from...
Discrepancies between experimental measurements and Standard Model predictions in B-meson decays, especially in lepton flavor universality ratios like $R_{D^{(*)}}$, $R_{J/\psi}$ and branching ratios for processes like $B\rightarrow K^*\nu\bar{\nu}$, suggest possible new physics (NP). In this study, we use an effective field theory framework, assuming NP effects only affect a single generation...
The impact of earth's gravity on neutral mesons dynamics is analyzed. The main effect of a Newtonian potential is to couple the flavor oscillations with the quarks zitterbewegung oscillations. This coupling is responsible of the observed CP violations (CPV) in the three types of experiments: (i) indirect violation in the mixing, (ii) direct violation in the decay to one final state and (iii)...
Hyperiso is a refactored and expanded version of the flavour code SuperIso allowing for efficient calculations of flavour observables. While SuperIso was dedicated to SM, THDM and several SUSY models, Hyperiso now implements a transparent interface with MARTY (a public tool to perform
analytical QFT calculations) to extend SuperIso’s observable calculation routines to generic BSM scenarii....
The Higgs boson mass and width are key free parameters of the Standard Model and must be determined experimentally. This poster presents the measurement of the Higgs boson mass in the H $\to$ ZZ $\to$ 4ℓ decay channel, using 138 $\text{fb}^{-1}$ of proton-proton collision data collected by the CMS experiment at a centre-of-mass-energy of 13 TeV. Constraints on the Higgs boson on-shell width...
Strict gauge invariance dictates that physical states must be composite, even for the weak sector of the Standard Model. This field-theoretical subtlety is resolved by the Fröhlich-Morchio-Strocchi (FMS) mechanism, which suggests additional Higgs contributions in Standard Model processes. While this has been supported by theoretical investigations in the purely bosonic sector, its implications...
Using $(2712.4 \pm 14.3) \times 10^{6}$ $\psi(3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $\eta_c \to \gamma\gamma$ in $J/\psi \to \gamma\eta_c$ is observed. We determine the product branching fraction $\mathcal{B}(J/\psi \to \gamma \eta_c) \times \mathcal{B}(\eta_c \to \gamma\gamma) = (5.23 \pm 0.26_{\text{stat.}} \pm 0.30_{\text{syst.}}) \times...
The search for a non-zero electric dipole moment (EDM) of the muon is a sensitive tool to test the Standard Model, as it would indicate a further violation of the charge-parity (CP) symmetry. The current best upper limit, established by the E821 experiment at BNL, is $d_\mu < 1.8 \times 10^{-19} \: e \cdot \text{cm}$ at 95% of confidence level. The forthcoming $\mu$EDM experiment at PSI aims...
The ALADDIN experiment at the LHC aims to measure the electromagnetic dipole moments of charm baryons, a powerful probe of physics within and beyond the Standard Model. Utilizing the phenomenon of particle channeling in bent crystals and a novel detector setup, ALADDIN overcomes challenges posed by short-lived particles, enabling precise spin-precession measurements. This initiative not only...
The measurement of the Higgs-charm Yukawa coupling is one
of the next milestones in Higgs physics at the LHC and serves as another
test of the consistency of the Standard Model. The Higgs-charm coupling
may be experimentally probed in different ways. These include for
example searches for signatures where a Higgs boson directly decays to a
pair of charm and anti-charm quarks or where a...
We present the most recent measurements of top production cross sections in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The dataset used was recorded by the CMS experiment at the LHC in special runs recorded in 2017, featuring a low-pileup environment, which offers a clean setting for precise cross-section measurements. Results are compared with state-of-the-art...
Hadronically decaying tau leptons are a challenging signature to study given it can be mimicked by quark and gluon jets, electrons, or muons. The identification of this signature via a convolutional neural network performed by CMS during the LHC Run 2 brought a massive improvement with respect to previous strategies. To further improve the identification and reconstruction of hadronic decays...
The Standard Model (SM) predicts the Higgs boson to be a CP-even (scalar) particle. Any deviation from a purely CP-even interaction of the Higgs boson with other SM particles would indicate physics beyond the SM. This poster presents a search for CP violating effects in Higgs boson production in association with a W boson, using proton-proton collision data collected by the ATLAS detector at...
A search for non-resonant Higgs boson pair production in the bbγγ final state is performed using the full Run 2 and partial Run 3 proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at CERN. The data amounts to an integrated luminosity of 140 fb-1 at a center of mass energy of 13 TeV, plus 59 fb-1 at a center of mass energy of 13.6 TeV. The analysis is...
The study of transverse-spin dependent azimuthal asymmetries in the Drell-Yan process provides crucial insights into the spin-dependent structure of nucleons. In combination with semi-inclusive deep inelastic scattering, it provides a key test of the restricted universality of transverse-momentum dependent parton distribution functions, which predict that the Sivers and Boer–Mulders functions...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. While the 2021 update of its CDR [1] contemplated concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC followed by standalone...
The first measurement of the high-mass ττ production cross section is presented, performed by the ATLAS Collaboration with the dataset of 140 fb-1 of pp collisions at sqrt(s) = 13 TeV. This process is also exploited to constraint new physics models affecting the Standard Model flavour sector. A fit to the τ-lepton pair invariant mass distribution is performed as a function of b-jet...
The LUXE experiment will study laser electron scattering at the European XFEL at DESY to explore an uncharted domain in Quantum Electrodynamics. To measure the number and the energy spectrum of electrons and positrons, produced in the multi-photon Breit-Wheeler process over a wide range of multiplicity, two electromagnetic calorimeters are foreseen. In Monte Carlo simulations it was...
The ever-increasing need of event generation in particle physics that is required by physics analysis of the LHC data requires innovative techniques to reduce both time and power consumption. We present a study to demonstrate the use of FPGAs and ACAPs to accelerate event generation using MadGraph. We evaluate the performance in terms of the execution time and the power consumption, as the...
The design of tracking chambers for future e⁺e⁻ colliders presents several challenges in terms of achieving high precision while maintaining low material budget and efficient particle identification. This presentation focuses on the development of a novel helium-based drift chamber for the IDEA (Innovative Detector for an Electron-positron Accelerator) experiment. The chamber, featuring a 4 m...
At the Phase-2 Upgrade of the CMS Level-1 Trigger (L1T), particles will be reconstructed by linking charged particle tracks with clusters in the calorimeters and muon tracks from the muon station. The 200 pileup interactions will be mitigated using primary vertex reconstruction for charged particles and a weighting for neutral particles based on the distribution of energy in a small area. Jets...
The Compact Muon Solenoid (CMS) detector at the LHC requires optimal performance in electron and photon reconstruction for many physical analyses. The excellent energy resolution of its Electromagnetic Calorimeter (ECAL) is crucial for studies of Higgs boson decays with electromagnetic particles in the final state, for instance for the Higgs mass measurement in two-photons decay channel, as...
For precise and unbiased physics analyses it is crucial that all the physics object have energy scales and resolution measured in data well described by Monte Carlo Simulations. In this talk we present the methods used to measure energy scale and resolutions for muons in CMS using Run3 data. The impact of these corrections on physics results is also assessed.
Neutrons constitute a major background in direct dark matter searches, yet previous measurements at LNGS have reported notable discrepancies in both flux values and energy spectra. These inconsistencies arise from variations in detector technologies, calibration methods, and energy windows used in different studies. Precise knowledge of this background is necessary to devise shielding and veto...
In the High-Energy Physics field there is an active search of the origin and the nature of the Ultra-high energy cosmic rays. These are messengers that carry information from far into the Universe, and they might also hint on direction towards new physics. This talk presents the overall hardware and software design, and the construction and calibration of DUCK (Detector system of Unusual...
The investigation of two-neutrino and neutrino-less double beta decay is crucial for understanding the Dirac or Majorana nature of neutrinos.
In this context, the krypton isotope Kr-78 (Q=2.88 MeV) stands out as a promising candidate for a first detection of two-neutrino ECb+ and 2b+ decays.
Detectors like the proposed NuDoubt++ experiment featuring opaque scintillator or an upgrade of...
The COMET experiment aims to search for the muon-to-electron $\mu-e$ conversion process, one of the lepton flavour violation processes, with a sensitivity better than $10^{-16}$ in J-PARC. To achieve this sensitivity, precisely controlling the secondary muon beam and suppressing the backgrounds is essential. The muon beam monitor will measure the muon beam profile directly, and monitor its...
Particle Identification is a critical and challenging task in high-energy physics
experiments, particularly for future collider facilities such as FCC-ee and CEPC. The
dE/dx method is limited by significant uncertainties in the total energy deposition,
which limit its particle separation capabilities. The cluster counting (dN/dx) technique
exploits the Poisson distribution of primary...
The MIP Timing Detector (MTD) is a major component of the CMS Phase-II upgrade for the High-Luminosity LHC (HL-LHC), featuring a time resolution of O(30) ps. It comprises the Barrel Timing Layer and the Endcap Timing Layer, covering complementary regions in pseudorapidity and enabling precision timing measurements across the detector.
The MTD will significantly enhance event reconstruction...
Physical processes with one or more τ-lepton in the final state play an important role in several analyses of the ATLAS experiment physics program. The usage of hadronic channels, in which τ-leptons decay into one or more pions, enables to exploit the large statistics associated with hadronic τ-lepton decays, but also requires a precise estimate of a sizable background of hadronic jets...
The increased instantaneous luminosity levels expected to be delivered by the High-Luminosity LHC (HL-LHC) will present new challenges to High-Energy Physics experiments, both in terms of detector technologies and software capabilities. The current ATLAS inner detector will be unable to cope with an average number of 200 simultaneous proton-proton interactions resulting from HL-LHC collisions....
DIPZ is a machine learning algorithm aiming to re-purpose the Deep Impact Parameter Sets (DIPS) jet-flavour taggers to instead regress the jet’s origin vertex position along the beam-line axis. Deployed at the ATLAS High Level Trigger (HLT), the DIPZ labels of each jet in an event are then used in an HLT jet algorithm to construct an event-wide likelihood-based discriminant variable (MLPL),...
The prospects of the Muon Collider promise an unprecedented potential for exploring the particle-physics energy frontier. Furthermore, the physics program from this future collider could provide both high-precision Higgs and Standard Model (SM) measurements and direct production of new particles predicted by various extensions of the SM. With these motivations, we consider the $\mu^+\mu^- \to...
The Resistive Plate Chambers (RPC) of the CMS experiment operate with a gas mixture composed of 95.2% C₂H₂F₄, a greenhouse gas with high Global-Warming Potential (GWP). In recent years, several eco-friendly alternatives, such as hydrofluoroolefins (HFOs), have been investigated to identify sustainable replacements that preserve the detector performance. Another promising approach is to...
In complex particle physics analyses where signal and background events are intertwined across multidimensional phase space, statistically consistent event-by-event weighting is indispensable for unbiased extraction of signal observables. However, many widely used methods can often fail to correctly estimate this separation, particularly in the presence of statistically independent variables...
The Monte Carlo simulation landscape for the CMS experiment has been enriched in view of the challenges for the High Luminosity(HL)-LHC. In addition to the very different functions of Full Simulation and Fast Simulation, a new player, FlashSim, is gaining in importance. Full Simulation scores with a precise simulation based on the Geant4 detector simulation, but at the expense of runtime. The...
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment that has taken data since 2010. After having obtained the first hints of CP violation in the leptonic sector, it has entered a second phase with an upgrade of its accelerator beam line and suite of near detectors. Among the different elements of this upgrade, two High-Angle Time Projection Chambers (HA-TPC) were...
During nominal LHC collisions, protons can interact with residual gas in the beam pipe or with upstream collimators, producing showers of background particles known as Beam-Induced Backgrounds (BIB). These particles do not originate from the actual proton-proton interaction point. BIB can significantly impact detector performance and mimic signals in searches for missing energy or for certain...
In 2024 the Belle II experiment resumed data taking after its Long Shutdown 1, which was required to install a two-layer pixel detector and upgrade components of the accelerator. We describe the challenges of this upgrade and report on the operational experience during the subsequent data taking. With new data, the SVD confirmed high hit efficiency, large signal-to-noise and good...
The ATLAS Muon Spectrometer, the largest muon system ever built at colliders, now
comprises both legacy gaseous detectors—Monitored Drift Tubes (MDT), Thin Gap
Chambers (TGC), and Resistive Plate Chambers (RPC)—which have been in operation
for over 15 years, as well as newer technologies like Micromegas and small-strip TGCs
in the NSW. These new systems are now in stable operation...
Progresses towards a Silicon-Tungsten ECAL for Higgs Factory Detectors
One way to achieve instrumental precision at future Higgs factories,
where multi-jets events represent the majority of the final states, is to conceive detectors based on the Particle Flow approach. This is the assumption followed by ILD(LC), SiD, CLICdet, ILD(CC), CLD and the baseline detectors concepts for the ILC,...
This contribution presents recent advancements in single-stage pixelised resistive Micromegas detectors for precision tracking and muon system applications in future collider experiments. These detectors combine high-rate capability, excellent spatial and timing resolution, and robust spark protection, making them well-suited for operation in demanding experimental environments.
The...
Muon reconstruction performance plays a crucial role in the precision and sensitivity of the Large Hadron Collider (LHC) data analysis of the ATLAS experiment. Accurately measuring the muon performance of the ATLAS detector is of paramount importance to provide fundamental input to physics analyses involving muons. Furthermore, the ATLAS Muon Spectrometer was significantly upgraded for LHC...
The possible detection of a heavy neutral Higgs boson $H$ predicted by the $U(1)_{B-L}$ model at the future multi-TeV muon collider for the center-of-mass energies of $\sqrt{s} = 3, 6, 10, 30, 50$ TeV with integrated luminosities of ${\cal L}_{\rm con}=1, 2, 3, 4, 10$ ${\rm ab^{-1}}$ and ${\cal L}_{\rm opt}=90, 250$ ${\rm ab^{-1}}$, is investigated. The following production and decay channels...
The CREDO collaboration studies cosmic-ray related phenomena on a large scale, searching for so called Cosmic-Ray Ensembles (CRE) and other unusual correlations and anomalies of non local nature. Such studies require data on Extensive Air Showers (EAS) and flux of secondary cosmic-ray particles that covers large areas. To perform such measurements, a large network of inexpensive detectors...
BESIII is a spectrometer hosted at the leptonic collider BEPCII, at the Institute of High Energy Physics, in Beijing since 2009. Its program covers charmonium(-like), charmed and light hadrons spectroscopy, new physics and QCD studies.
Its physics program has been recently extended up to 2030. In 2024, both the accelerator and the spectrometer are undergoing an upgrade program. The inner...
The LHCb detector has undergone a significant upgrade, enabling the experiment to acquire data with an all-software trigger, made possible by real-time front-end readout and fast, efficient online reconstruction. The Upstream Tracker (UT), a four-plane silicon microstrip detector located in front of the dipole magnet, is crucial for charged particle trajectory reconstruction. The UT is...
Searches for leptoquarks are a key component of the LHC program probing physics beyond the Standard Model. These hypothetical particles couple to a lepton and a quark and are predicted by many extensions of the Standard Model such as Grand Unified Theories. The existing leptoquark searches at the LHC currently mostly consider production modes via quark and/or gluon interactions. However, the...
Phase-2 CMS will replace the trigger and data acquisition system in preparation for the HL-LHC. This upgrade will allow a maximum accept rate of 750kHz and a latency of 12.5us. To achieve this, new electronics and firmware are being designed. We describe the first version of an algorithm capable of detecting and identifying muon showers, running in the first layer of the trigger system. It was...
The High-Luminosity LHC will increase proton-proton collision rates to 5-7.5 times the nominal LHC luminosity, resulting in 140-200 pp-interactions per bunch crossing. To ensure effective muon triggering and reconstruction in this high-rate environment, the forward Muon spectrometer of the CMS experiment will be upgraded with Gas Electron Multiplier (GEM) detectors.
The ME0 station will...
Wavelength-shifting optical fibers are commonly used to collect light from large detector volumes and guide towards photosensors, making them particularly interesting for water Cherenkov or scintillator based detectors. However, one problem is their low photon capture rate, leading to a degradation in the energy resolution of fiber-based detectors.
Building on previous work, it was shown...
Perturbative Quantum Field Theory is central to perform accurate theoretical predictions of observables at high-energy colliders. Fundamental concepts in this framework, such as loop Feynman diagrams and the phase-space, involve evaluating multidimensional integrals that are computationally intensive due to divergences and complex mathematical structures. To address these challenges and...
I will present our experience with the production, recording, and publication of a series of 15 short outreach videos about Particle Physics, in Brazilian Portuguese, in the format of Instagram reels. The videos cover different aspects of our research work at the University of Sao Paulo (Brazil), where I lead a group dedicated to QCD and Particle Physics. We produced videos with different...
Tau leptons play a crucial role in studies of the Higgs boson and searches for Beyond the Standard Model physics at the LHC. This talk presents the latest advancements in the reconstruction and identification of hadronic decays of tau leptons at the CMS experiment. The tau identification algorithm deployed for the early Run 3 data-taking period, based on a deep convolutional neural network...
Unsupervised anomaly detection has become a pivotal technique for model-independent searches for new physics at the LHC. In high-energy physics (HEP), anomaly detection is employed to identify rare, outlier events in collision data that deviate significantly from expected distributions. A promising approach is the application of generative machine learning models, which can efficiently detect...
Advancements in geometric deep learning offer powerful tools to study the internal structure of jets initiated by heavy quarks, particularly in the context of dead-cone effect and jet quenching. The kinematics of b-hadron decays present a challenge for substructure measurements with inclusive b-jets, which are essential for quantum chromodynamics (QCD) studies. We propose an approach using...
The Mu2e experiment is designed to investigate the CLFV through the observation of a neutrinoless muon-to-electron conversion in the field of an Al nucleus. The observation of such a process would be clear evidence of physics beyond the standard model. Due to the rarity of this process, a cutting-edge, intense muon beam is required to achieve an improvement of the current single-event...
Going through an incredible amount of change right now in preparation for the Hi-Lumi phase of CMS, it is very important to make sure all the work of the collaboration is captured in audiovisual media. To do this for a collaboration of over 6000 people across 250 institutes is a large challenge, but it is essential for future-proofing the history of CMS. In fact, there is more audiovisual...
In this contribution, we present the machine learning-based strategy to improve the reconstruction of neutral meson events within the Large Hadron Collider forward (LHCf) experiment. The LHCf experiment is uniquely positioned in the very forward region of the LHC to investigate the hadronic interactions relevant to high-energy cosmic ray air shower simulations by measuring forward-produced...
Introducing elementary particles to science and engineering students (non-physics majors), poses both a challenge and an opportunity. The challenge lies in the inherently limited scope of the topic, which is usually taught as part of an elective modern physics course. The opportunity lies in being able to share the beauty of our subject with people who are motivated to learn and tend to focus...
Since 2022, IPPOG has adapted its successful International Masterclasses (IMC) to involve CERN’s non-scientific personnel. These sessions offer an accessible introduction to particle physics for colleagues in administration, communication and other non-research departments, helping them connect with CERN’s core mission.
Following the positive response to the first edition, further sessions...
In view of the high luminosity campaign of the LHC (HL-LHC), the computational requirements of the ATLAS experiment are expected to increase remarkably in the coming years. In particular, simulation of Monte Carlo events is immensely demanding from the computational point of view and their limited availability is one of the major sources of uncertainty in many analyses. The main bottleneck in...
The Overlap Muon Track Finder (OMTF) is a key subsystem of the CMS L1 Trigger, identifying muon tracks in the transition region between the barrel and the endcap. For the Phase-2 upgrade, we are exploring new approaches and leveraging machine learning (ML) to enhance its performance. In this project, we focus on integrating a Graph Neural Network (GNN) to improve the OMTF's ability to...
Modern experiments in particle, astroparticle physics, and cosmology, particularly those probing for New Physics, are increasingly relying on quantum sensors to achieve unprecedented sensitivities. These include efforts to determine the absolute neutrino mass scale, search for neutrinoless double beta decay, detect potential dark matter candidates, or measure the B-mode polarization of the...
It is more important than ever to not only have a diverse community within science, but to show it to those outside who provide support and resources, as well as to young people hoping to make a career in this field. Allowing our audiences to see themselves reflected in members of our community, or to aspire to people we show them is a powerful way of connecting to them. In this poster, we, as...
AI nowadays is a new tool that seems to be everywhere including education. It brings convenience but also concerns - the two largest concerns with using AI by instructors are the safety of students’ data and the AI lack of the specific knowledge needed in a specific class. The data safety can be addressed by using a locally run large language models model using Ollama framework, a free tool...
Ultra-peripheral collisions (UPC) are events characterised by large impact parameters between the two projectiles, larger than the sum of their radii. In UPCs, the protons and ions accelerated by the collider do not interact via the strong interaction and can be regarded as sources of quasireal photons, with minimal contamination from hadronic interactions.
In this talk, we present novel...
The Mu2e experiment is designed to investigate the CLFV through the observation of a neutrinoless muon-to-electron conversion in the field of an Al nucleus. The observation of such a process would be clear evidence of physics beyond the standard model. Due to the rarity of this process, a cutting-edge, intense muon beam is required to achieve an improvement of the current single-event...
The CMS experiment is one of the largest international scientific collaborations in history, involving more than 6000 particle physicists, engineers, technicians, students and support staff from 250+ institutes in 55+ countries. The physics program and technical achievements of CMS are of great interest to a wide range of stakeholders, ranging from the general public, other scientists,...
The LHCb detector, with its unique forward geometry, provides unprecedented kinematic coverage at low Bjorken-x values, down to 10^-6. LHCb’s excellent momentum resolution, vertex reconstruction and particle identification allow precision measurements down to very low hadron transverse momentum. In this talk, recent studies of exclusive vector boson production in proton-proton and heavy ion...
Measurements of photon-induced processes are presented, using data collected in Run-2.
An important aspect of the Higgs boson physics programme at the LHC is to determine all the properties of this particle, including its mass, which is a free parameter in the SM, and its width. This presentation will discuss the latest developments in measurements of the Higgs boson mass and width, with data collected by the CMS experiment at a centre of mass energy of 13 TeV. Both direct and...
Models of inelastic (or pseudo-Dirac) dark matter commonly assume an accidental symmetry between the left-handed and right-handed mass terms in order to suppress diagonal couplings. Moreover, they often introduce a gauge symmetry spontaneously broken by the introduction of a dark sector version of the Higgs mechanism. Removing the requirement of such an accidental ad-hoc symmetry instead...
We discuss a class of exotic muon decay signatures that extend beyond the well-studied lepton flavor-violating channels such as $\mu \to e\gamma$ and $\mu \to eee$. We focus on rare processes featuring final states with $2m+1$ electrons and $n$ photons, exploring their theoretical origin and experimental relevance. Our analysis begins in the framework of the Standard Model Effective Field...
Flavour-changing neutral current processes, such as $b\to s\ell^+\ell^-$ and $b\to d\ell^+\ell^-$ transitions, are highly sensitive probes of new physics. In the Standard Model, their contributions are both loop and CKM suppressed, with $b\to d\ell^+\ell^-$ further suppressed by small off-diagonal quark-flavour mixing couplings and forbidden at the lowest perturbative order. The $b\to...
With the approaching High Luminosity phase of the LHC programme, scheduled to start in 2030, the Offline Software and Computing group of the CMS collaboration is reviewing the experiment’s computing model to ensure its readiness for the computing challenges the HL-LHC poses. An in-depth revision of the current model, tools and practices is being carried out, along with a programme of R&D...
Identifying products of ultrarelativistic collisions delivered by the LHC and RHIC colliders is one of the crucial objectives of experiments such as ALICE and STAR, which are specifically designed for this task. They allow for a precise Particle Identification (PID) over a broad momentum range.
Traditionally, PID methods rely on hand-crafted selections, which compare the recorded signal of...
Motivated by the recent evidence of an excess in the rare decay $B\to K E_{\rm miss}$ presented by the Belle II collaboration we discuss possible new physics (NP) scenarios in which light invisible states participate in flavour-changing $b\to s$ transitions. Based on a model-independent EFT framework to describe the new light states, we study the signatures given by the differential...
The new results on three-pion Bose-Einstein correlations measured with the sample of proton-proton collisions recorded at the centre-of-mass energy of √s = 7 TeV will be presented, being the first study of three-particle Bose-Einstein correlations measured in the forward region provided by the LHCb detector. The results are interpreted within the core-halo model for the first time in...
The ATLAS Experiment on the Large Hadron Collider at CERN is one of the largest most complex scientific instruments ever constructed. It has been built and operated by an international collaboration of over 5900 members of 103 nationalities from 243 institutes around the world. While the scientific goals and results of the experiment are continually reported to colleagues in the field through...
Measuring diboson final states is a unique opportunity at the LHC, as they provide precision tests of QCD and EW predictions at unprecedented accuracies, shedding light on the non-Abelian structure of the SM EW theory, and leading to stringent constraints on Effective Field Theory Wilson coefficients. This talk summarizes recent results from ATLAS on this topic.
This talk presents recent precision measurements of key properties of the Higgs boson using the full dataset of proton-proton collisions at √s = 13 TeV collected during Run 2 of the LHC by the ATLAS experiment. The Higgs boson mass is determined with high accuracy through its decays into two photons and four leptons, and the adopted analysis strategies and experimental techniques will be...
SABRE is an international collaboration that will operate similar particle detectors in the Northern (SABRE North) and Southern Hemispheres (SABRE South). This innovative approach distinguishes possible dark matter signals from seasonal backgrounds, a pioneering strategy only possible with a southern hemisphere experiment. SABRE South is located at the Stawell Underground Physics Laboratory...
Based on the large samples of 10 billion J/ψ and 2.7 billion ψ(3686) events collected by the BESIII detector, the recent progresses on baryon spectroscopy, including the amplitude analyses of $ψ(3686) \to p \bar{p} \pi^0$, $ψ(3686) \to p \bar{p} \eta$, and $ψ(3686) \to \Lambda \bar{\Sigma} \pi$, will be presented. The perspectives on the baryon spectroscopy at BESIII will also be discussed.
Inorganic scintillators are widely used to build compact and high-energy-resolution homogeneous electromagnetic calorimeters. Recent tests have shown that if the impinging angle of the particle relative to a lattice axis is smaller than one degree, the strong field experienced by electrons and photons with an energy larger than a few GeV increases the standard bremsstrahlung and...
The FCC-ee programme is uniquely positioned to provide unprecedented precision on the fundamental properties of the Higgs boson. At the center-of-mass energies 240 and 365 GeV, the FCC-ee will produce millions of Higgs bosons via Higgs-strahlung and vector boson fusion. The clean experimental environment allows a model-independent measurement of the absolute ZH cross-section to better than...
With the increasing size of the machine learning (ML) model and vast datasets, the foundation model has transformed how we apply ML to solve real-world problems. Multimodal language models like chatGPT and Llama have expanded their capability to specialized tasks with common pre-train. Similarly, in high-energy physics (HEP), common tasks in the analysis face recurring challenges that demand...
Flavour physics represents a unique test bench for the Standard Model (SM). New analyses performed at the LHC experiments and new results coming from Belle II are bringing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture provides very precise SM predictions through global analyses.
We present here the results of the latest global SM analysis performed...
The Belle II experiment at the SuperKEKB accelerator in Tsukuba, Japan, searches for physics beyond the Standard Model, with a focus on precise measurements of flavor physics observables. Highly accurate Monte Carlo simulations are essential for this endeavor, as they must correctly model the variations in detector conditions and beam backgrounds that occur during data collection. To meet this...
The CYGNO/INITIUM project introduces an innovative approach to directional Dark Matter detection using a gaseous Time Projection Chamber (TPC). Targeting low mass (0.5-50 GeV) WIMPs-like Dark Matter, the experiment uses a He/CF4 gas mixture sensitive to both spin-dependent and spin-independent interactions at atmospheric pressure with optical readout. Building on the success of our 50 L...
The BESIII experiment has collected 2.6 billion $\psi(3686)$ events, 10 billion $J/\psi$ events, 20 $fb^{-1}$ of D meson pairs at 3.773 GeV, and 7.33 $fb^{-1}$ of $D_sD_s^*$ events from 4.128 to 4.226 GeV. The huge data samples allow us to search for rare processes in charm hadron decays. In this talk, we report searches for FCNC decay $J/\psi \to D^0\mu^+\mu^-$ and $D_s^+ \to h(h')e^+e^-$....
New directions in science are launched by new tools more often than by new concepts.
At the present time characterised by incremental increase of the energy and intensity of particle beams, Gamma Factory (GF) proposes leaps in the intensity (up to 7 orders of magnitude), quality (low emittance, polarisation CP-tagging, flavour tagging), and precision control of several types of particle...
Experimental data on the interaction between vector mesons and nucleons are a crucial input for understanding the pattern of in-medium chiral symmetry restoration (CSR) and dynamically generated excited nucleon states. However, accessing these interactions is hampered by the short-lived nature of the vector mesons, making traditional scattering experiments unfeasible. In recent years the ALICE...
The next generation of calorimeters for experimental facilities at future colliders, as FCC-ee or Muon Collider, should offer excellent spatial, time and energy resolution. This is essential to fulfil the 5D calorimetry paradigm, ensuring detectors suitable for particle-flow (PF) techniques which guarantee unprecedented precision in jet energy resolution. Such advancements will enable the...
Recent results on global EFT fits of the CMS data are presented, with particular focus on the electroweak sector of the Standard Model.
Outreach and communication with the public is an integral part of our work as researchers. A wide range of activities and platforms allow ALICE members to share, especially with the young generation, the excitement of our field. ALICE Masterclasses for high-school students, both in-person and online, are expanding, reaching a higher number of students every year. Visits to the experiment site,...
We study the quantum properties of the Higgs-boson decays into four fermions via two vector bosons $(H\to VV^*\to 4f)$. In particular, we focus on the case of two different-flavour lepton pairs $(H\to ZZ^*\to \mu^+\mu^- e^+ e^-)$. We compute the quantum-information observables for the corresponding two-qutrit system $(ZZ)$ at next-to-leading order electroweak (NLO EW) accuracy in the SM. We...
The observed matter-antimatter asymmetry in the universe is a serious challenge to our understanding of nature. BNV/LNV decays have been searched for in many experiments to understand this large-scale observed fact. In this talk, we present the recent results from the BESIII experiment on the searches for baryon number violation via $\Lambda-\bar{\Lambda}$ oscillation in $J/\psi \to \Lambda...
The unprecedented volume of data and Monte Carlo simulations at the HL-LHC poses increasing challenges for particle physics analyses, demanding computation-efficient analysis workflows and reduced time to insight. The recent W mass measurement by CMS exemplifies these challenges and demonstrates the application of cutting-edge techniques essential for future analyses. We present a...
The CRESST (Cryogenic Rare Event Search with Supercoduncting Thermometers) experiment located in the underground facility of the Laboratori Nazionali del Gran Sasso (LNGS) aims to measure dark matter particles through their elastic scattering off nuclei in scintillating crystals. The target crystals are equipped with Transition Edge Sensor (TES) thermometers and operated at mK temperature as...
We discuss the role of Flavour physics in global fits of dimension-six operators in the Standard Model Effective Theory. We present results from fits with different assumptions on the SMEFT flavour structure: U(3)^5, U(3)^5 and Minimal Flavour Violation. The leading-order scale dependence of the SMEFT Wilson coefficients is consistently included in the evolution from the UV scale to the...
The $e^+e^- \to \pi^+\pi^-$ process at flavour factories plays a crucial role in the data-driven determination of the hadronic contribution to the muon $g-2$. The recent CMD-3 measurement of the pion form factor via energy scan displays a significant discrepancy with the previous experimental determinations. In this contribution, a new fully differential calculation of the $e^+e^- \to...
The Advanced Wakefield Experiment, AWAKE, at CERN is an accelerator R&D experiment, which moved from a proof-of-concept experiment to a facility that develops the proton-driven plasma wakefield acceleration technology to be ready for proposing first particle physics applications in the 2030’s. The AWAKE program aims to accelerate electrons to energies of 10 to 100 GeV in a single plasma...
The electron-positron Future Circular Collider (FCC-ee) is a proposed high-energy lepton collider that aims to reach unprecedented precision in the measurements of fundamental particles. The high beam currents, with a top-up continous injection, and the high interaction
frequency produce machine induced backgrounds in the detector, especially at the Z peak energy. This contribution presents...
The muon magnetic anomaly, ,a_mu= (g – 2)/2, can be both measured and computed to a very high precision, making it a powerful probe to test the Standard Model of particle physics and search for new physics. At the beginning of the 2000s, the E821 experiment at Brookhaven (USA) measured with a precision of 0.54 parts per million (ppm), finding a discrepancy of about three standard deviations...
The KM3NeT collaboration is constructing two cutting-edge underwater neutrino detectors in the Mediterranean Sea: ARCA, which is optimized for the detection of astrophysical neutrinos, and ORCA, which aims to determine the neutrino mass hierarchy via the observation of atmo-
spheric neutrinos. The increasing size of the detectors results in significant data volumes, requiring effective data...
Advances in Machine Learning, particularly Large Language Models (LLMs), enable more efficient interaction with complex datasets through tokenization and next-token prediction strategies, providing a novel framework for analyzing high-energy physics datasets. This talk presents and compares various approaches to structuring particle physics data as token sequences, allowing LLM-inspired models...
The particle nature of dark matter remains a key unanswered questions in modern physics, despite it making up the majority of matter in the universe. The NEWS-G collaboration is searching for light dark matter candidates using a gaseous detector, the spherical proportional counter. The use of light gaseous targets, including H, He, Ne, etc., combined with a low energy threshold, enable access...
The Standard Model predicts the Higgs boson to be a CP-even scalar, but CP-odd contributions to its interactions with vector bosons and quarks are not yet strongly constrained. Various Higgs boson production and decay processes provide valuable tools to investigate the CP nature of these interactions. This talk presents the most recent measurements of the CP properties of Higgs boson...
The $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay is a golden mode for flavour physics. Its branching ratio is predicted with high precision by the Standard Model to be less than $10^{-10}$, and this decay mode is highly sensitive to indirect effects of new physics up to the highest mass scales. A new measurement of the $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay by the NA62 experiment at the...
Using $(2259.3 \pm 11.1)\times10^{6}$ $\psi(2S)$ events acquired with the BESIII detector, the branching fraction of $\psi(2S)\rightarrow\tau^{+}\tau^{-}$ is measured with improved precision to be
$\mathcal{B}_{\psi(2S)\rightarrow\tau^{+}\tau^{-}}=(3.240~\pm~0.023~\pm~0.081)\times
10^{-3}$, where the first and second uncertainties are statistical and systematic, respectively, which is...
The CMS experiment relies on high-precision reconstruction of particles to access a wide range of analyses. This talk presents recent developments in the reconstruction and performance of key objects using early Run 3 data. Advances include improved calibration techniques, machine learning-based identification, and improved pileup mitigation strategies.
The COMET experiment at J-PARC facility in JAPAN is designed to search for charged lepton flavour violation (cLFV), one of the most promising way of looking for physics beyond the Standard Model. Specifically, it will search for the coherent, neutrinoless conversion of a muon to an electron in the field of an aluminum nucleus, a process that is forbidden in the Standard Model and highly...
The ``Laser-hybrid Accelerator for Radiobiological Applications'', LhARA, is conceived as a novel, uniquely-flexible facility dedicated to the study of the biological impact of proton and ion beams. The collaboration is implementing a proof-of-principal beam-line, "PoPLaR", on the SCAPA facility at Strathclyde University. It is planned that the beam line will be commissioned over the summer...
Since 2010, ATLAS Virtual Visits have revolutionised HEP outreach by connecting its collaboration members with audiences worldwide. The Virtual Visit model brings inspiring scientific outreach events to visitors who would otherwise not have such an opportunity. Over the years, by offering the visits in a variety of languages and using a variety of online platforms, we have expanded their...
Rare kaon decays offer a sensitive window into short-distance physics and potential signals of physics beyond the Standard Model (BSM). This work focuses on several key decay modes—namely $K^+ \to \pi^+ \nu\bar{\nu}$, $K_L \to \pi^0 \nu\bar{\nu}$, and $K_L \to \pi^0 \ell^+ \ell^-$—highlighting how new physics scenarios can influence their behavior. We perform a global analysis of current rare...
Data preservation is essential for present and future experimental facilities, enabling cost-effective fundamental research by leveraging unique data sets as theoretical and experimental understanding advances. This contribution summarizes the status of data preservation in high energy physics from a perspective of 15 years of experience with a structured collaborative effort at international...
Electroweak Precision Measurements are stringent tests of the Standard Model and sensitive probes to New Physics. Accurate studies of the Z-boson couplings to the first-generation quarks, which are currently only constrained from LEP data, could reveal potential discrepancies from the theory predictions. Future $e^+e^-$ colliders running at the $Z$-pole would be an excellent tool for an...
This study presents an analysis of modern open-source large language models (LLMs)—including Llama, Qwen, and Gemma—to evaluate their encoded knowledge of Quantum Chromodynamics (QCD). Through reverse engineering of these models' representations, we uncover the naturally idiosyncratic patterns in how foundational QCD concepts are embedded within their parameter spaces. Our methodology combines...
Probing the non-perturbative regime of Quantum Chromodynamics (QCD) remains a critical challenge in hadron spectroscopy, particularly concerning the role of gluonic excitations in shaping the hadronic spectrum. The GlueX experiment at Jefferson Lab is designed to address this challenge through the search for exotic hybrid mesons, states predicted by QCD to include gluonic degrees of freedom...
The Compact Muon Solenoid (CMS) Experiment is a multi-purpose detector, located at the Large Hadron Collider (LHC) in CERN. It is equipped with several sub-detector systems to reconstruct high-energy collision particles. Resistive Plate Chambers (RPC), known for their fast response and good timing resolution, are used as one of the sub-detectors for muon detection within the CMS Muon System....
In March 2025, the Atacama Cosmology Telescope (ACT) released its last cosmological analysis along with a new cosmic microwave background (CMB) dataset. The sixth data release (DR6), including data collected from 2017 to 2022, covers 40% of the sky at arcminute resolution providing the most precise maps of CMB temperature and polarization. In this talk, I will give an overview of the ACT DR6...
We investigate the phenomenology of a dark sector, extension of the neutrino sector, that simultaneously provides a viable dark matter (DM) candidate, reconciles cosmological constraints with active neutrino masses possibly measurable in laboratories such as KATRIN, and yields near-future testable predictions.
The dark sector comes into thermal equilibrium with Standard Model neutrinos after...
The ATLAS Collaboration has recently, for the first time, released a large volume of data for use in research publications, with its use being now extended via a new education-focused release. The 2015 and 2016 proton collision datasets, along with a large quantity of matching simulated data, in a light format, PHYSLITE, for research purposes, and in a simplified version for educational...
Reconstructing the trajectories of charged particles as they traverse several detector layers is a key ingredient for event reconstruction at LHC and virtually any particle physics experiment. The limited bandwidth available, together with the high rate of tracks per second O(10^10) - where each track consists of a variable number of measurements - makes this problem exceptionally challenging...
Rare radiative-and-leptonic $B_s$-meson decay is a golden channel to scrutinize hypothetical New Physics (NP) effects in $b \to s$ quark transitions. Contrarily to the purely leptonic counterpart, i.e. $B_s \to \mu^+ \mu^-$, it is sensitive to a larger set of Wilson coefficients and it is not helicity suppressed. The LHCb Collaboration has set a first limit on the Branching Ratio (BR) of...
The Bc meson, the heaviest among known mesons, decays through the weak interaction. Its double-heavy quark content and distinct masses present new challenges and opportunities for testing effective theories with unique decay, spectroscopy and production properties. These features offer valuable insights into heavy-quark dynamics inside hadrons and enhance our understanding of the strong...
Some effects induced by SMEFT operators at one-loop have been fully computed, in particular, the renormalization of divergences by physical operators in single insertions of dimension-six operators. Important non-logarithmically enhanced contributions remain to be calculated. We discuss dimensional regularization in the Breitenlohner-Maison 't Hooft-Veltman scheme. The goal here consists of...
LEGEND-1000 is a next-generation experiment designed to search for the neutrinoless double-beta (0νββ) decay. The observation of 0νββ decay of $^{76}$Ge isotope would establish the Majorana nature of neutrinos, providing insight into the mechanism of neutrino mass generation and the matter-antimatter asymmetry of the universe.
To achieve an unprecedented discovery sensitivity to 0νββ...
Signatures of new physics at the LHC are varied and by nature often very different from those of Standard Model processes. Novel experimental techniques, including dedicated datastreams are exploited to boost the sensitivity of the CMS Experiment to search for such signatures. In this talk we highlight the most recent CMS results, obtained using the data collected at the LHC Run-II and Run-III...
In the high-luminosity era of particle physics, advanced computing methods are vital for tackling the unprecedented scale and complexity of data, inspiring us to explore innovative quantum approaches for data analysis. We investigate the impact of incorporating problem-specific permutation invariance into hardware-efficient quantum fidelity kernels for high energy physics data analysis in...
The LHCb experiment is designed for precision measurements of CP violation and rare decays of beauty and charm hadrons. A key component enabling these studies is the Ring Imaging Cherenkov (RICH) system, which provides robust particle identification (PID) over a wide momentum range. With the start of Run 3 and the transition to a triggerless readout at 40 MHz, the RICH detectors have undergone...
The dark photon is a popular choice when considering a portal between the Standard Model and the dark sector. In this work, we revisit the exclusion constraints on the dark photon, using the latest electroweak precision data from the Particle Data Group, and explore the impact on these constraints due to the CDF measurement of the W boson mass. In addition, we set upper bounds directly on dark...
The photoleptonic decay B→lνγ* is the simplest low-energy process that probes the substructure of the B meson. For an energetic photon, its amplitude can be accessed within the frame of collinear factorization or QCD factorization (QCDF). The factorization formula depends critically on the light-cone distribution amplitudes (LCDAs) of the B meson. The physical photoleptonic amplitude arises in...
In November 2014, CMS made history by releasing its first batch of open data, comprising approximately 27 terabytes of proton-proton collision data collected in 2010 at a 7 TeV center-of-mass energy. This groundbreaking release marked the beginning of a new era in particle physics at the LHC, where researchers, educators, and enthusiasts worldwide could access and analyse real collider data....
Thanks to the extended energy range and beam polarization, the linear option for future e+e- collider facility offers unique opportunities for precision electroweak studies and top quark measurements. Beam polarization is not only essential for many observables but also allows better control of background and reduction of systematic uncertainties. The extended energy range of the linear...
The Dark energy Spectroscopic Instrument (DESI) is measuring spectra of millions of distant galaxies and
quasars over a five-year period that started in spring 2021. A 3D map of the universe is built from the observations
and statistical methods applied to this map allows to place strong constraints on the underlying cosmological
Model. The main probe used in the data analysis is the...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. While the 2021 update of its CDR [1] contemplated concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC followed by standalone...
In the absence of direct evidence for new physics in targeted searches, model-independent strategies are becoming increasingly important. In this talk, we present recent results of model-agnostic searches that are facilitated by advanced machine learning techniques, opening a new avenue for unbiased detection of potential new physics signals.
ESSnuSB is a design study for a long-baseline neutrino experiment to precisely measure the CP violation in the lepton sector at the second neutrino oscillation maximum, using a beam driven by the uniquely powerful ESS linear accelerator. The ESSnuSBplus design study programme, which is an extension phase of the ESSnuSB project, aims in designing two new facilities, a Low Energy nuSTORM and a...
The muon spectrometer of the ATLAS detector will undergo a substantial upgrade during the Phase-II upgrade to meet the operational demands of the High- Luminosity LHC. Most of the electronics for the Monitored Drift Tube (MDT) chambers, Resistive Plate Chambers (RPC), and Thin Gap Chambers (TGC) will be replaced to ensure compatibility with the higher trigger rates and extended latencies...
Exographer is a particle-physics inspired video game released on September 26, 2024, on Steam (for PC and Mac), Xbox, PlayStation 5, and Nintendo Switch. Developed by a team assembled around a particle physicist from the CMS collaboration at École Polytechnique (France), the game aims to introduce fundamental concepts of particle physics to new and curious audiences.
Players explore a richly...
The FASER experiment at the LHC is designed to search for light, weakly-coupled new particles, and to study high-energy neutrinos. The experiment has been running since 2022, and has collected nearly 200/fb of pp collision data. FASER has released a search for long-lived dark photons, and long lived axion-like-particles (also interpreted in several other scenarios). This talk will summarise...
Radiative rare b-hadron decays offer a unique window into potential contributions from physics beyond the Standard Model through precise measurements of branching fractions, angular distributions, CP-violating observables, and photon polarization. The LHCb experiment, with its high-efficiency trigger system, excellent tracking resolution, and advanced particle identification capabilities,...
Measurements of the properties of jets initiated by a charm quark represent a valuable tool to investigate the properties of quantum chromodynamics (QCD) processes such as the evolution of the heavy-flavour quark parton shower and hadronisation processes.
Casmir colour effects (different for quarks vs gluons) and mass effects (driven by the dead cone of heavy quarks), impact the properties...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. While the 2021 update of its CDR [1] contemplated concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC followed by standalone...
Phase-0 of the MoEDAL-MAPP Facility began with installing the MoEDAL detector at IP8 on the LHC ring in 2010. In 2021, as part of Phase-1, CERN approved MoEDAL’s reinstallation for Run-3 with key upgrades: a tenfold lower detection threshold, a fivefold luminosity increase, and a center-of-mass energy boost from 13 TeV to 13.6 TeV. MoEDAL will continue searching for highly ionizing particles...
Neutrino tagging is a new experimental approach for accelerator based neutrino experiments. The method consists in associating a neutrino interaction with the meson decay (i.e. $\pi^\pm\to\mu^\pm \nu_\mu$ or $K^\pm\to\mu^\pm \nu_\mu$) in which the neutrino was originally produced. The properties of the neutrino can then be estimated kinematically from the decay incoming and outgoing charged...
The FCC-hh, operating at a centre-of-mass energy of 84 TeV, will produce unprecedentedly large samples of single and double Higgs bosons, enabling detailed studies of rare decays and precise measurements of the Higgs self-coupling. With billions of single-Higgs events, FCC-hh will measure rare decays such as H→μμ, H→γγ, and H→Zγ with percent-level precision. It will also significantly enhance...
In this talk, we present an implementation of multiple fermion flavors in both the Kogut-Susskind and Wilson formulations for quantum simulations of (2+1)-dimensional Quantum Electrodynamics (QED). Our numerical results show a particular type of level crossing with one flavor of fermions at zero density for Wilson fermions, as expected from analytical Chern number calculations. Moving forward,...
The Vertical Drift Far Detector of the Deep Underground Neutrino Experiment (DUNE) will be instrumented with a Vertical Drift Time Projection Chamber (LAr TPC) and a Photon Detection System (PDS). The PDS installed alongside a TPC provides the time-stamp for off-beam physics, and can further contribute with precise timing information and calorimetry for energy reconstruction. The expected...
In this talk, I will present our recent developments in MadGraph5_aMC@NLO for elementary-particle production in asymmetric systems, including photoproduction and proton–nucleus collisions. I will also discuss the first implementation of bound-state production, specifically quarkonia, the simplest bound states in QCD. Indeed, we have extended the support of radiative corrections at...
One of the great open questions in modern physics is the origin of the matter-antimatter asymmetry. This requires baryon-number violation, which has never been experimentally observed. Baryon-number violation may arise in the neutron sector as the direct conversion between neutrons and antineutrons, or with a sterile/mirror neutron.
This process will be probed with the proposed HIBEAM/NNBAR...
For many students and members of the public interested in particle physics and astrophysics, direct access to real research is limited due to the need for expensive and large-scale equipment such as accelerators and telescopes. However, recent advances in technology have made it feasible to develop low-cost detectors, and several groups have started creating simple yet functional instruments...
We present the most recent $BABAR$ searches for reactions that could simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic $B$-meson decays into an ordinary-matter baryon and a dark-sector anti-baryon $\psi_D$ with branching fractions accessible at the $B$ factories.
The results are based on the full data set of...
High energy photon-photon interactions provide unique opportunity for studying with high precision the electroweak sector of particle physics at future electron-hadron colliders [1]. In particular, facilities such as the LHeC [2, 3], and its proposed phase-one option at a 0.75 TeV centre-of-mass energy [4], FCC-eh, or SppC-eh, will offer very advantageous experimental conditions and at the...
With the immense number of images, data and sources that Euclid will deliver, the consortium will be in a unique position to create/provide/construct legacy catalogs, with exquisite imaging quality and superb Near Infrared Spectroscopy, with impact on may areas of galaxy science. This talk will review the current results and prospects that Euclid will be able to achieve in areas of Galaxy...
This contribution discusses the physics potential of a future muon collider operating at a center-of-mass energy $\sqrt{s}= 10$ TeV for precision studies in the Higgs sector. Using a detailed detector simulation that incorporates the dominant sources of machine-induced background, the expected sensitivity to key Higgs processes is evaluated. These include the measurement of production cross...
The CMS Muon System Upgrade is a significant part of the overall upgrade strategy for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC), particularly for the High Luminosity LHC (HL-LHC) phase, which is expected to start around 2030. The HL-LHC will increase the LHC's luminosity by a factor of 5–7 beyond its original design, allowing it to collect more data and...
The search for weakly interacting massive particles (WIMPs) remains a central goal of the High Luminosity Large Hadron Collider (HL-LHC). In this work, we explore radiative neutralino decays within the framework of the Z₃-invariant Next-to-Minimal Supersymmetric Standard Model (NMSSM), focusing on scenarios where the lightest supersymmetric particle (LSP) is a singlino-dominated neutralino. In...
The electron-positron stage of the Future Circular Collider (FCC) will provide measurements of the Z and W bosons couplings and masses 1--3 orders of magnitude better than the present state-of-the-art. With the run around the Z pole, where the integrated luminosity is expected to be about six orders of magnitude larger than at LEP, the Z boson mass and width, as well as the $Z \to b\bar{b}$...
While spin correlations and spin entanglement have been measured for top quarks at the LHC, they remain unexplored for other quark flavors. We propose analysis strategies for measuring spin correlations, entanglement, and Bell nonlocality in $b \bar b$ samples using the partial preservation of the spin information in $\Lambda_b$ baryons from bottom quark fragmentation. We find that certain...
We derive and solve the renormalization-group (RG) equation for the shape function $ g_{17}(\omega,\omega_1;\mu) $, which appears at subleading power in the factorization of the inclusive decays $ \bar{B} \to X_s \gamma $ and $ \bar{B} \to X_s \ell^+ \ell^- $.
Our results provide the first key ingredient for a next-to-leading order analysis of the resolved-photon $ Q_1^c - Q_{7\gamma} $...
The MilliQan experiment is an ongoing search for millicharged particles (mCPs), which arise naturally in many Dark Sector models which offer potential Dark Matter candidates. The experiment is located just above the CMS experiment at the LHC and leverages this proximity along shielding from most standard model backgrounds to gain sensitivity to mCPs in the mass range of $0.01-45...
Sharing the amazing achievements of the particle physics world with the general public is at the heart of the Subatomic Heroes. Our activities range from merging art with a public physics lecture to marvelous performances at the local theater, over dedicated events for high-school students, to our Subatomic Heroes channel on instagram where you may also find out when and where our famous...
Parton distribution functions (PDFs) describe universal properties of hadrons. They provide insights into the non-perturbative internal structure of bound states and are highly significant for experiments. Calculating PDFs involves evaluating matrix elements with a Wilson line in a light-cone direction. This poses significant challenges for Monte Carlo methods in Euclidean formulation of...
The muon-to-electron (µ-e) conversion corresponds to the charged lepton flavor violating process, in which a muon captured by an atom converts into a single electron with constant momentum of 105 MeV/c in the case of an aluminum target. The COMET (COherent Muon-to-Electron Transition) experiment at J-PARC is going to search for µ-e conversion in aluminum, aiming for a sensitivity of 10⁻¹⁷,...
We present a new application of Graph Neural Networks (GNNs) for LHC searches that aims to improve event classification by representing entire datasets as graphs, with events as nodes and kinematically similar events connected by edges. The strategy builds from our development of graph convolutions and graph attention mechanisms, where we apply scalable solutions for training various GNN...
The Neutrinos from Stored Muons, nuSTORM, facility has been designed to provide intense neutrino beams with well-defined flavour composition and energy spectra. By using neutrinos from the decay of muons confined within a storage ring, a beam composed of equal fluxes of electron- and muon-neutrinos can be created for which the energy spectrum can be calculated precisely. The case for the...
An axion-like particle $a$ (ALP) can explain the excess of $B\rightarrow K+invisible$ events at Belle-II. However, many analyses of ALP scenarios are over-simplified. We revisit the $B\rightarrow K+a$ transition rate in a popular minimal and UV complete model with two Higgs doublets (2HDM) and a complex singlet (DFSZ model). To this end we compare our results with previous studies which...
A new LEGO model of the ATLAS detector has been developed to aid and enhance educational outreach. Comprising over 21,000 LEGO elements and measuring over 1m in length, this accurate 1/50 scale model depicts ATLAS as it will appear in the High-Luminosity LHC (HL-LHC) era. Cutaway walls clearly reveal every component of the real detector, from the muon chambers down to the ITk Strip Detector...
Monte Carlo generators are at the core of LHC data analyses and will remain crucial for future lepton colliders offering unprecedented energies and luminosities. With a Higgs factory on the horizon and ongoing studies on the physics potential of a muon collider, the development of the generators must be continuously supported to meet the anticipated experimental precision.
We give a status...
An accurate and efficient simulation of final-state radiation is key for many studies of hadron decays in view of the ever-increasing experimental precision. In this talk, we present a new simulation tool based on the Antenna parton shower, the Vincia generator, which we recently extended to simulate QED radiation from hadrons. As part of this effort, we implemented state-of-the-art tree-level...
The realm of particle physics is full of astonishing phenomena and open problems. One is confinement, typical of QCD in (3+1)D with SU(3) gauge group. Lattice Gauge Theory (LGT) enables us to study it numerically with Tensor Networks. We focus on the pure Z₂ LGT in (2+1)D, dual to the quantum Ising model, which preserves criticality while reducing degrees of freedom. Our numerical...
The CLOUD collaboration is pioneering the first fundamental research reactor antineutrino experiment using the novel LiquidO technology for event-wise antimatter tagging. CLOUD’s program is a potential byproduct of the AntiMatter-OTech EIC/UKRI-funded project focusing on industrial reactor innovation. The experimental setup is envisioned to be an up to 10 tonne detector, filled with an opaque...
Despite the large amount of data generated by the Large Hadron Collider (LHC) so far, searches for new physics have not yet provided any clear evidence of beyond the Standard Model (BSM) physics. Most of these experimental searches focus on exclusive channels, looking for excesses in specific final states. However, new physics could manifest as a dispersed signal over many channels. It...
