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Dr Amy Cottle (University of Oxford - Department of Physics)24/04/2023 14:15Dark Universe
LUX-ZEPLIN (LZ) is a direct dark matter detection experiment currently operating at the Sanford Underground Research Facility (SURF) in Lead, South Dakota. It uses the world’s largest dual-phase xenon time projection chamber, with 7 tonnes of active xenon, primarily to look for dark matter in the form of Weakly Interacting Massive Particles (WIMPs). LZ has released its first WIMP search...
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Dr Julien Masbou (SUBATECH)24/04/2023 14:45Dark Universe
A rich number of astrophysical and cosmological observations indicate the existence of a massive, non-luminous and non-baryonic matter component which is commonly referred to as dark matter (DM). One well motivated class of DM are weakly interacting massive particles (WIMPs) which arise naturally from several beyond-Standard-model theories.
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The XENON dark matter project aims for the direct... -
Cyprien Beaufort (CNRS/LPSC)24/04/2023 15:15Dark Universe
Directional detection is the only admitted strategy for the unambiguous identification of galactic Dark Matter (DM) even in the presence of an irreducible background. The directional detection strategy relies on the simultaneous measurements of the energy and the direction of a DM-induced nuclear recoil, and on the correlation of the recoil direction with the expected incoming WIMPs direction....
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Yoann GÉNOLINI (LAPTh, Annecy)24/04/2023 16:15Dark Universe
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Simon Cléry (IJCLab - Pôle théorie)24/04/2023 16:45Dark Universe
Inflation is now very well motivated because it can solve many issues of the Big Bang scenario. Specific models of inflation can be tested by observations, most notably by the CMB anisotropy power spectrum. I will present results on (dark) matter production in the late time evolution of this inflationary field usually called "reheating", and the challenges to probe these mechanisms. Especially...
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Arthur Schaffer (IJCLab), R.D. Schaffer (lal)25/04/2023 09:00Higgs
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Dr Timothée Theveneaux-Pelzer (CPPM)25/04/2023 09:20Higgs
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Ingo Schienbein (LPSC)25/04/2023 09:40Higgs
In the general Two-Higgs Doublet Model it has been shown that the Higgs potential can be expressed in terms of gauge-independent quantities. In particular, stability, electroweak symmetry breaking, and CP symmetry can be understood in a concise way, avoiding unphysical gauge degrees of freedom. In a recent work, arXiv:2208.13179, we have completed this program showing how all the masses, the...
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Suzanne GASCON-SHOTKIN (IPN Lyon)25/04/2023 10:00Higgs
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Mohammad Mahdi Altakach25/04/2023 11:00Higgs
We introduce a methodology and investigate the feasibility of measuring quantum properties of tau lepton pairs in the $H \to \tau^+ \tau^-$ decay at future lepton colliders.
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In particular, observation of entanglement, steerability and violation of Bell inequalities are examined for the ILC and FCC-ee. -
Giacomo Cacciapaglia (IP2I Lyon)25/04/2023 11:20
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Alessandro Tarabini25/04/2023 11:40Higgs
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Arnaud Maury ({UNIV PARIS-SACLAY}UMR9012)25/04/2023 12:00Higgs
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Yehudi Simon (LPTHE - Sorbonne Université)25/04/2023 14:00
We calculate total and differential cross sections for the pair production, at the Large Hadron Collider, of exotic leptons that could emerge from models with vector-like leptons and in Type-III seesaw scenarios. Our predictions include next-to-leading-order QCD corrections, and we subsequently match them with either parton showers, or threshold resummation at the next-to-next-to-leading...
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Felix Wilsch (University of Zurich)25/04/2023 14:20
The separation of scales in effective field theories is essential for studying the low-energy phenomenology of BSM models. An effective theory, containing only light degrees of freedom, can be obtained from an underlying UV theory by integrating out heavy states using path integral techniques, ensuring that both theories describe the same low-energy dynamics. It is important to perform this...
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Nikita Schmal (ITP, Heidelberg University)25/04/2023 14:40
We present an updated global SMEFT analysis in the Top sector using the SFitter framework which focuses on a comprehensive treatment of uncertainties. We make use of a newly implemented marginalization procedure which allows for comparisons between profiling and marginalization methods. In addition, two top measurements included in the fit are updated using likelihoods made publicly available...
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Florian Nortier (IPhT (CEA Paris-Saclay))25/04/2023 15:00
Measuring the Higgs boson couplings with an increasing precision is an indirect probe of new physics scenarios. In this talk, I will discuss how observing loop-induced deviations to hWW and hZZ couplings via new vectorlike leptons close to the weak scale can be used to deduce an upper bound on the mass scale of new bosons. This is an interesting example where observing a deviation to the...
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Cedric Delaunay (LAPTH)25/04/2023 15:20
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Emilian Dudas (CPHT, Ecole Polytechnique)25/04/2023 16:10
The axion couplings and their relation to quantum anomalies are discussed.
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I comment on a puzzling non-decoupling effect and its consequences. -
Rémy Larue (LPSC)25/04/2023 16:30
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Robin Ducrocq (IPHC)25/04/2023 16:50
I will present a model related to a new class of solutions in gravity-mediated supersymmetry breaking. This class of solutions involves a new sector which may help to reduce the fine tuning of the Higgs boson mass. New supersymmetry breaking terms are generated corresponding to soft breaking terms and new hard breaking terms that are Planck-suppressed but may be sizable and contribute to the...
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Roberto Franceschini (CERN)25/04/2023 17:10
In this talk I will review the physics case of a high energy muon collider for the exploration of new physics with particular focus on Higgs boson physics, top quark physics and dark matter. I will discuss the role of a high energy muon collider in the landscape of future experiment to probe new physics in the next decades.
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25/04/2023 19:30
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Dirk Zerwas (IJCLab and DMLab)26/04/2023 09:30Methods and Tools
Presentation of the new vesrion of SUSPECT3 (v3.1.1) described in "SuSpect3: A C++ Code for the Supersymmetric and Higgs Particle Spectrum of the MSSM"
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Timothee Pascal26/04/2023 09:55Methods and Tools
I will present recent developments in SModelS, in particular the update of the database with the latest available experimental results for full Run-2 luminosity, the interface to the new statistical package Spey, and the statistical combination of analyses. The latter allows one to increase the robustness of the statistically inferred constraints. To demonstrate the physics impact, I will use...
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Nicolas Berger (LAPP)26/04/2023 10:20Methods and Tools
The ability to reuse published experimental results -- for instance reinterpretations in the context of alternative models, or combinations of multiple results -- is crucial to searches for new phenomena in high energy physics. The information that is made public, typically best-fit values, uncertainties and covariance matrices, is often insufficient to fully carry out this program, in...
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Humberto Reyes-González (University of Genoa)26/04/2023 11:15Methods and Tools
Full statistical models encapsulate the complete information of an experimental result, including the likelihood function given observed data. Their proper publication is of vital importance for a long lasting legacy of the LHC. Major steps have been taken towards this goal; a notable example being ATLAS release of statistical models with the pyhf framework. However, even the likelihoods are...
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Stefano Forte (Dipartimento di Fisica, Università di Milano)26/04/2023 11:40Methods and Tools
I discussed some issues that arise when using Machine Learning as an inference tool in the particular context of the determination of parton distributions. Problems I address include: how do we know that the ML model generalizes correctly? Can we detect overlearning? Can we assign an uncertainty to the ML model predictions, and can we validate this assignment?
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26/04/2023 12:05
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Dr Carlo FLORE (IJCLab Orsay)26/04/2023 13:45Joint session with GDR QCD WG3
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Emanuele Re26/04/2023 14:10Joint session with GDR QCD WG3
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Juan Salvador TAFOYA VARGAS (ATLAS - IJCLab / Université Paris-Saclay)26/04/2023 14:35Joint session with GDR QCD WG3
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Valerio Bertone (IRFU, CEA, Université Paris-Saclay)26/04/2023 15:00Joint session with GDR QCD WG3
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26/04/2023 15:25
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Sreemanti ChakrabortiDark Universe
We study a minimal model for a light scalar dark matter (DM) with a mass of a few GeV, requiring a light dark photon mediator to interact with the Standard Model (SM) particles. We analyse the model by focusing on the Breit-Wigner resonance for DM annihilation channels, considering the thermal relic abundance condition that includes the early kinetic decoupling effect. The interactions of the...
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