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Vietnam Flavour Physics Conference 2025

→ Asia/Ho_Chi_Minh
International Centre for Interdisciplinary Science and Education (ICISE)

International Centre for Interdisciplinary Science and Education (ICISE)

Binh Dinh, Vietnam
Nazila Mahmoudi (Lyon University), Yoshi Uchida (Imperial College London)
Description

https://indico.in2p3.fr/e/VietnamFlavour2025

This meeting, normally held every three years, is intended to promote fruitful collaboration between experimentalists and theorists, between physicists in the areas of:

  • Searches for New Physics including the Dark Sector
  • Phenomenology of Physics Beyond the Standard Model
  • Beauty and Charm physics
  • Kaon physics
  • Tau and Muon physics
  • Neutrino physics
  • CP violation
  • Rare decays
  • Future facilities

from institutions across the world, by bringing together a limited number of particle physicists in beautiful and inspiring surroundings. A particular emphasis will be made on searches for new physics which complement direct studies at the LHC.

Confirmed expert speakers include:

  • Damir Bečirević (IJCLab, Orsay)
  • Giancarlo D'Ambrosio (INFN Naples)
  • Massimo Passera (INFN Padova)
  • Enrico Lunghi (Indiana University)
  • Radoslav Marchevski (EPFL, Lausanne)
  • Abhishek Iyer (Indian Institute of Technology, Delhi)
  • Mauro Valli (INFN Rome)
  • Minoo Kabirnezhad (Imperial College London)
  • Lorenzo Calibbi (Nankai University)
  • Mu-Chun Chen (UC Irvine)
  • Marzia Bordone (CERN)
  • Giulia Ricciardi (Naples U. and INFN Naples)

 

See Vietnam Flavour Physics: Aims and Goals for a broader list of physics goals that the discussions at the 2022 conference focused on. 

Founded in 1993 by Jean Tran Thanh Van, the association Rencontres du Vietnam, a non-profit organization and an official partner of UNESCO, has as its objective the promotion of international exchanges between Vietnam and the international community, particularly in the areas of science and education. It also aims at the encouragement and integration of Vietnamese scientists into the international scientific community and at supporting the role of education and science by encouraging scientific awareness and stimulating passion for science in the younger generation. The Rencontres du Vietnam lies within the scope of two series of scientific meetings created by Jean Tran Thanh Van : the Rencontres de Moriond in 1966 and the Rencontres de Blois in 1989.

The creation of the International Centre for Interdisciplinary Science Education (ICISE) in the city of Quy Nhon (Central Vietnam) has the ambitious objective to focus on developing Science and Education by fostering exchanges between Asia-Pacific scientists and colleagues from other parts of the world.

 

VietnamFlavour2025-Agenda-Draftv0806b-experimentalonly.pdf
Vietnam Flavour Physics Conference
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  • dim. 17 août
    • 16:00
      Registration at the ANYA Hotel ANYA Hotel

      ANYA Hotel

      The registration desk will stay open during the Welcome Cocktails

    • 19:00
      Welcome Cocktail ANYA Hotel

      ANYA Hotel
    • 19:30
      Dinner ANYA Hotel

      ANYA Hotel
  • lun. 18 août
    • Opening Session
    • B-Decays and CP Violation: Monday Morning
    • 12:40
      Lunch
    • B-Decays and CP Violation: Monday Afternoon
      • 7
        A fresh look at the B anomalies

        For nearly a decade, some decays of B mesons have hinted at possible deviations from the Standard Model — raising hopes of new physics, but also questions about underestimated hadronic effects. In this talk, I will take a fresh look at the so-called B anomalies, focusing on the latest experimental results from CMS, LHCb and Belle II. I will discuss the current theoretical understanding of hadronic effects in these decays and the implications for new physics. I’ll assess where the anomalies currently stand and whether they genuinely challenge the Standard Model, which has withstood decades of scrutiny.

        Orateur: Mauro Valli (INFN Rome)
        Vietnam_25_MV.pdf
      • 8
        Inclusive vs exclusive b->s l+ l- decays: a path around irreducible non-perturbative uncertainties

        Inclusive rare semileptonic B decays (B->Xs l+ l-) probe the very same physics that is at the heart of the famous anomalies found by LHCb in various exclusive b->sll decays. Even though inclusive modes are much harder to measure than the corresponding exclusive ones, they offer a unique opportunity to cross check the anomalies using observables which suffer from a completely orthogonal set of theoretical uncertainties.
        I discuss the state of art calculations of the three observables that can be constructed in inclusive decays and discuss how measurements performed at Belle, BaBar and LHCb can already shed light on the anomalies.
        I conclude with a presentation of the expected constraints that can be obtained using the full expected Belle-II data set and with a discussion of strategies to improve the extrapolation in the Xs invariant mass that is required, at low-q2, to connect the experimental fiducial region to the total rate.

        Orateur: Enrico Lunghi (Indiana University)
        t-250818-Vietnam-bsll.pdf
      • 9
        New physics prospects in the rare $B_c \to D_s \ell^+ \ell^-$ decay

        This talk will be on the $U_1$ leptoquark (LQ) prospects in the rare $B_c \to D_s \ell^+ \ell^-$ decay channel, mediated by the FCNC $b \to s \ell^+ \ell^-$ transition. Complex leptoquark couplings are considered which will allow for possible new CP violation sources. These couplings are constrained using current experimental data in the $b \to s \ell \ell$ sector. We work with a few new physics scenarios involving the Wilson coefficients $C_9^{(\prime)}(\rm{NP})$ and $C_{10}^{(\prime)}(\rm{NP})$, and make predictions of the CP asymmetry for the $B_c \to D_s \ell^+ \ell^-$ mode. I will discuss on possible sizeable CP asymmetry in some of the LQ scenarios, and also the impact of the LQ couplings on the branching fraction and the LFU ratio for these modes within the considered LQ scenarios.

        Orateur: Barilang Mawlong (University of Hyderabad)
        barilang-flavour-vietnam2025.pdf
      • 10
        CP violation in B decays at Belle II
        Orateur: Ming-Chuan Chang (Fu Jen Catholic University)
        Flavour Physics Conference 2025 in Quy Nhon0818.pdf
      • 15:30
        Coffee Break
      • 11
        Recent results on CPV from b-hadron to charmonium decays at LHCb
        Orateur: Yinghua Tan
        Vietnam_CPV_b2charmonium.pdf
      • 12
        CPV in b-hadron decays at LHCb
        Orateur: Mary Richardson-Slipper (University of Cambridge)
        MaryRS_RdV_v2.pdf
      • 13
        Discussion
        Orateurs: Damir BECIREVIC (IJCLab - Pôle Théorie), Gerco Onderwater (Maastricht University), Michael Ratz (University of California, Irvine), Nazila Mahmoudi (Lyon University), Prof. Yoshi Uchida (Imperial College London)
    • 18:30
      Dinner
  • mar. 19 août
    • Charged Lepton Flavour Physics: Tuesday Morning
      • 14
        Overview of charged lepton flavor violation

        The standard model of particle physics is far from accounting for mysteries about our universe, --e.g., what is origin of neutrino masses and their hierarchy? Why is there so little antimatter in this world? etc. -- and it must be extended to a more fundamental description of nature. Such new physics models allow Charged Lepton Flavor Violating (CLFV) reactions which are exactly forbidden in the standard model. Hence search for CLFV is a clue to the new physics, which unveil the flavor structure and the symmetries behind it. In this talk, the general features of the CLFV processes are reviewed, and relevant experimental progresses are discussed.

        Orateur: Masato Yamanaka (Shikoku Gakuin University)
        flavor2025-Yamanaka.pdf
      • 15
        MEG II
        Orateur: Toshiyuki Iwamoto (The University of Tokyo)
        iwamoto_vietnam_2025.pdf
      • 16
        Mu3e
        Orateur: Dr Tamasi Rameshchandra Kar (Physics Institute, Heidelberg University.)
        Mu3e
        Tkar_Vietnam.pdf
      • 09:55
        Coffee Break
      • 17
        The COMET Experiment: Searching for The μ-e Conversion Signal at J-PARC

        Charged lepton flavor violating (CLFV) is one of the powerful tools to search for the physics beyond the Standard Model. The COMET experiment will search for the CLFV process μ− + N(Z, A) → e− + N(Z,A) in Al with single event sensitivity of 10-15 at Phase-I and 10-17 at Phase-II, which is two orders and four orders of magnitude respectively improvement on the current upper limited set by SINDRUM-II in Au. The COMET experiment will take place at J-PARC and will start with the low intensity beam in 2026. The updated status of the COMET beam line, superconducting magnets, detectors, data acquisition system and the schedule of the beam will be present in this talk.

        Orateur: Truong Nguyen (FPT University - Da Nang)
        MT-VNFlavourPhysics-2025-r5.pptx
      • 18
        Lepton flavor violating decay of true muonium:  $(\mu^+ \mu^-) \to \mu^\pm e^\mp$

        We propose a new charged lepton flavor violating (CLFV) process: the decay of true muonium $(\mu^+ \mu^-)$ into a lepton pair of different flavors, $\mu^\pm e^\mp$. This purely leptonic, hadron-free process provides a clean signature and enables the probing of both photonic dipole and four-fermion CLFV interactions. Since CLFV mediators indirectly appear in most CLFV processes, it is important to search for various types of processes to identify the new particles responsible. We calculate the branching ratio using scalar, vector, and dipole operators, and by comparing with existing experimental constraints, we show it can reach $\mathcal{O}(10^{-20})$.

        Orateur: Ryotaro Minato (Yokohama National University)
        RyotaroMinatoVietnam2025.pdf
        RyotaroMinatoVietnam2025.pptx
      • 19
        Electroweak penguin and lepton-flavour violating B decays to final states with missing energy at Belle II

        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 decays to final states with missing energy from neutrinos.
        Results from $b\to s\nu \bar{\nu}$ processes and their interpretation are presented. In addition, we present searches for the processes . Finally, we present our searches for the lepton-flavour violating decays $B \to K^{(*)} \tau^{\pm} \ell^{\mp}$, where $\ell$ is an electron or muon.

        Orateur: Roberta Volpe (Charles University Prague)
        Volpe_Vietnam2025.pdf
      • 20
        Muon g−2: Theory
        Orateur: Massimo Passera (INFN Padova)
        Passera_20250819.pdf
    • 12:00
      Lunch
    • Charged Lepton Flavour Physics: Tuesday Afternoon
      • 21
        Final Result from the Fermilab Muon g-2 Experiment

        In quantum field theory, the magnetic moment of a charged spin-$\frac{1}{2}$ particle such as the muon deviates slightly from the Dirac value of 2 due to quantum loop corrections involving virtual particles. This deviation, known as the anomalous magnetic moment, $a = (g - 2)/2$, is sensitive to all quantum effects, including potential contributions from particles beyond the Standard Model (SM). As such, precise measurements of the muon anomalous magnetic moment, $a_\mu$ served as powerful tests of the SM and valuable probes for new physics. The Muon g-2 experiment at Fermilab measures $a_\mu$ by observing the spin precession of muons stored in a uniform magnetic field. The key observable is the frequency difference $\omega_a$ between the muons's spin precession and cyclotron motion, which is directly proportional to $a_\mu$. By determining $\omega_a$ and the magnetic field with high precision using nuclear magnetic resonance (NMR) probes, the experiment extracts $a_\mu$ with unprecedented accuracy. The Fermilab collaboration has now released its final result, achieving a record-breaking precision of 127 parts per billion (ppb), surpassing the original design goal of 140~ppb. This result is the most precise measurement of $a_\mu$ to date, based on a dataset more than three times larger than that used in the 2023 analysis and encompassing data collected from 2021 to 2023. The achievement reflects years of experimental upgrades and methodological advances. While earlier comparisons with the 2020 Muon g-2 Theory Initiative prediction indicated a significant discrepancy, recent developments in theoretical calculations, particularly from lattice QCD have narrowed the gap, prompting ongoing discussion about the true level of deviation. However, the final measurement thus sets a new benchmark for testing the SM and constraining possible extensions. In this talk, I will present an overview of the Fermilab Muon g-2 experiment, focusing on the key upgrades and refinements made during the 2021-2023 data-taking period that enabled this milestone result.

        Orateur: Siew Yan Hoh (Shanghai Jiao Tong University)
        SYH_g2_QuyNhon_2025.pdf
      • 22
        The J-PARC Muon g−2 Experiment
        Orateur: Gerco Onderwater (Maastricht University)
        Quy Nhon 2025-v1.pdf
      • 23
        Discussion
        Orateurs: Gerco Onderwater (Maastricht University), Dr Masato Yamanaka (Hiroshima Institute of Technology), Massimo Passera (INFN Padova), Michael Ratz (University of California, Irvine), Nazila Mahmoudi (Lyon University), Prof. Yoshi Uchida (Imperial College London)
    • 15:05
      Coffee Break
    • Kaon Physics: Tuesday Afternoon
      • 24
        Challenges in Rare Kaon decays

        I will review the interesting decays KL->pi0 ll, K+->pi+ l l and KS->mu mu, complementary to the golden K+->pi+ nu nubar and KL->pi0 nu nubar. I will review the theoretical challenges and phenomenological interest. As possible strategy to evaluate hadronic matrix elements we discuss large N, N large number of colours. Also I will highlight possible new directions to uncover new physics

        Orateur: Giancarlo D Ambrosio (INFN Sezione di Napoli)
        Giancarlo_dambrosio_Qui_Nhon.pdf
        Giancarlo_dambrosio_Qui_Nhon.pdf
      • 25
        Experimental Perspectives in Kaon Physics
        Orateur: Radoslav Marchevski (EPFL)
        19-08-Kaons-Vietnam.pdf
      • 26
        Status and Prospects of the J-PARC KOTO Experiment

        For the first time in history, the ultra-rare KL->pi0nunubar decay, also known as the “Golden Mode”, can be experimentally probed at the level of its Standard Model predicted branching ratio of 3x10^{-11}. This milestone is being pursued through a two-stage approach by the KOTO experiment and its successor KOTO II at J-PARC. The current KOTO experiment has entered a phase of stable data collection and is expected to reach a sensitivity below O(10^{-10}) for probing the KL->pi0nunubar decay within the next 2–3 years, benefiting from the upgraded accelerator Main-Ring at J-PARC. KOTO II is designed to determine the central value of BR(KL->pi0nunubar) within the coming decade. In this presentation, we would like to outline the current status and physics potential of KOTO, and also present the future plan for KOTO II.

        Orateur: Yu-Chen Tung (National Kaohsiung Normal University)
        Vietnam_2025.pdf
      • 27
        Observation of the of $K^{+} \rightarrow \pi^{+} \nu \bar{\nu}$ decay and measurement of its branching ratio at NA62

        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 CERN SPS is presented, using data collected in 2021 and 2022. This new dataset was collected after modifications to the beamline and detectors and at a higher instantaneous beam intensity with respect to the previous 2016-2018 data taking. Using the NA62 datasets from 2016-2022, a new measurement of $\mathcal{B} (K^{+}\rightarrow\pi^{+}\nu\bar{\nu}) = \left(13.0^{+ 3.3}_{- 2.9} \right)\times 10^{-11} $ is reported, and for the first time the $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay is observed with a significance exceeding $5\sigma$.

        Orateur: Jacopo Pinzino (INFN Pisa)
        Pinzino_Vietnam25.pdf
      • 28
        Kaon Physics: a vision for the future
        Orateur: Abhishek Iyer (Indian Institute of Technology, Delhi)
        Iyer_19082025.pdf
      • 29
        Discussion
        Orateurs: Gerco Onderwater (Maastricht University), Giancarlo D Ambrosio (INFN Sezione di Napoli), Michael Ratz (University of California, Irvine), Nazila Mahmoudi (Lyon University), Radoslav Marchevski (EPFL), Prof. Yoshi Uchida (Imperial College London)
    • 18:30
      Dinner
  • mer. 20 août
    • Beauty and Charm Physics: Wednesday Morning
      • 30
        Introduction to Beauty and Charm Physics
        Orateur: Enrico Lunghi (Indiana University)
        t-250820-Vietnam-IntroBD.pdf
      • 31
        Heavy-flavour results from the ATLAS experiment

        This presentation will highlight recent advances in heavy-flavour physics achieved with Run-2 data collected by the ATLAS experiment. It will focus on the latest results in heavy-flavour hadron production and decay measurements, as well as the spectroscopy of exotic heavy-flavour states. Key topics include the most precise determination of the B0 meson lifetime, measurements of charmed meson production cross-sections, and investigations of resonant structures in the di-charmonium mass spectrum.

        Orateur: Dominic Jones (University of Sussex)
        ATLAS_HeavyFlavour_VFPC_slides.pdf
      • 32
        Highlights in heavy-flavour physics from the CMS experiment
        Orateurs: Kai Yi (University of Iowa), Priyanka Sadangi (NISER)
        VFPC_Priyanka.pdf
      • 33
        Tetraquark results from CMS
        Orateur: Kai Yi (University of Iowa)
        VietnamFalvour20252025.pdf
      • 10:00
        Coffee Break
      • 34
        Charm Physics and Hadron Spectroscopy at Belle and Belle II
        Orateur: Sourabh Chutia (IISER Mohali (Belle II collaboration))
        RecontredDeVietnam.pdf
      • 35
        Charmonium-like states at BESIII

        In recent years, a number of charmonium-like states have been observed above the open-charm threshold in various experiments. Their properties often go against our expectations for regular charmonium states, rendering their interpretation difficult. With BESIII, we are a leading contributor to the experimental studies of the so-called XYZ states – studying Y-states directly in e+e- annihilation, while producing X and Z states in hadronic and radiative transitions. In this talk, several very recent results from the BESIII program on charmonium-like states above the open-charm threshold will be discussed.

        Main references: arXiv:2505.13222; Phys. Rev. Lett. 135, 071901 (2025); Phys. Rev. D 112, 032002 (2025); Phys. Rev. D 111, 112007 (2025)

        Orateur: Kai Zhu (Institute of High Energy Physics, CAS, China)
        charmonium-like states at BESIII Vietnam ZhuK.pdf
      • 36
        Novel approaches to determine B meson production fractions

        In this talk, I present novel methods [Bernlochner:2023bad] to determine the $\Upsilon(4S)\to B^+B^-$ and $\Upsilon(4S)\to B^0\bar B^0$ decay rates. The precision to which they and their ratio are known yields at present a limiting uncertainty around $2\%$ in measurements of absolute $B$ meson decay rates, and thus in a variety of applications, such as precision determinations of elements of the Cabibbo--Kobayashi--Maskawa matrix and flavor symmetry relations. The new method proposed here is based on exploiting the existing and future $\Upsilon(5S)$ data sets, as well as global event characteristics in $B^\pm$ and $B^0$ decays. Estimates of future sensitivities using these methods and possible measurements of $f_d / f_u$ at the (HL-)LHC are briefly discussed.

        Orateur: Greg Landsberg (Brown University)
        ProductionFractions-Flavour25.pdf
      • 37
        Discussion
        Orateurs: Enrico Lunghi (Indiana University), Gerco Onderwater (Maastricht University), Michael Ratz (University of California, Irvine), Nazila Mahmoudi (Lyon University), Prof. Yoshi Uchida (Imperial College London)
    • B-Decays and CP Violation: Wednesday Morning
      • 38
        CP Violation and Angle $\gamma$ through $B_s^0 \to D_s^{\mp} K^{\pm}$ Decays

        Flavour physics plays a central role in testing the Standard Model and searching for possible hints of New Physics. Precise measurements of CP violation provide stringent tests of the SM framework. The CKM angle $\gamma$ is a key parameter in this context, and a theoretically clean way to determine it is through the $B_s^0 \to D_s^{\mp} K^{\pm}$ decay system. Recent experimental updates measuring CP-violating observables in these decays have been performed by LHCb. The intriguing patterns arising highlight the need for a thorough theoretical analysis. We develop a model-independent approach to incorporate potential New Physics contributions and apply it to the data. Such a method offers promising avenues to uncover new sources of CP violation in the upcoming high-precision era of B physics.

        Orateur: Dr Eleftheria Malami (University of Siegen)
        Vietnam Flavour Physics.pdf
    • 13:30
      Excursion
    • 18:30
      Gala Dinner (i.e., fancy setting and alcohol)
  • jeu. 21 août
    • Neutrino Physics: Thursday Morning
      • 39
        Introduction to Neutrino Physics
        Orateur: Mu-Chun Chen (University of California, Irvine)
        2025Vietnam_Neutrino_MCChen.pdf
        2025Vietnam_Neutrino_MCChen.v2.pdf
      • 40
        New Constraints on the Electron Antineutrino Mass from the KATRIN Experiment

        The fact that neutrinos have a nonzero rest mass would provide clear evidence of physics beyond the Standard Model, with wide-reaching implications in both particle physics and cosmology. The KATRIN (Karlsruhe Tritium Neutrino) experiment aims to determine the absolute neutrino mass scale by performing high-precision spectroscopy of electrons emitted in tritium beta decay near the kinematic endpoint. In this contribution, we present results from the analysis of the first five measurement campaigns. Utilizing a data set collected over 259 days, along with substantially reduced background levels and improved control of systematic uncertainties, we determined best-fit value of m_ν^2=-0.14_(-0.15)^(+0.13) eV^2. This yields a new upper limit on the effective electron antineutrino mass of m_ν<0.45 eV at 90% confidence level. This result improves KATRIN’s previous limit by nearly a factor of two and establishes a new benchmark for direct neutrino mass measurements.

        Orateur: Jakkapat Seeyangnok (Chulalongkorn University)
        KATRIN Quy Nhon 2025.pdf
      • 41
        T2K
        Orateur: Joanna Zalipska (NCBJ)
        t2k_jzalipska_v3.pdf
      • 42
        Precision measurement of neutrino oscillation parameters with NOvA

        NOvA represents the second generation of accelerator-based long-baseline neutrino experiments conducted at Fermilab. Utilizing the megawatt-capable NuMI beam, neutrinos or antineutrinos are produced to study oscillation phenomena across an 810 km baseline. Two functionally identical and finely segmented tracking detectors filled with liquid scintillator have been collecting data for the past decade, equivalent to $26.6\times10^{20}$ protons-on-target (POT) with the neutrino beam and $12.5\times10^{20}$ POT with the antineutrino beam. The 3-flavor oscillation analyses combine $\nu_\mu(\bar{\nu}_\mu)$ disappearance and $\nu_e(\bar{\nu}_e)$ appearance channels to provide measurements of mixing angles $\theta_{23}$ and $\theta_{13}$, mass splitting $\Delta m^{2}_{32}$, neutrino mass ordering, and charge-parity symmetry violation in the lepton sector. Since the previous data release, both frequentist and Bayesian approaches have been implemented, with consistent outcomes. This talk will present key results, including the world-leading precision on $\Delta m^{2}_{32}$ (1.5%) achieved in a single experiment, and the first application of the two-dimensional constraint on a parameters pair ($\theta_{13}, \Delta m^{2}_{32}$) from Daya Bay increased the sensitivity to neutrino mass ordering.

        Orateur: Anastasiia Kalitkina (Joint Institute for Nuclear Research)
        Kalitkina_VFPh_2025.pdf
      • 10:20
        Coffee Break
      • 43
        Super-Kamiokande status and prospects

        Since beginning operations in 1996, Super-Kamiokande has played a pivotal role in advancing our understanding of neutrino mixing, solar and supernova astrophysics, and in setting some of the most stringent limits on nucleon decay. These efforts have been further strengthened by the recent phased addition of gadolinium to the detector’s pure water volume, significantly improving antineutrino identification via tagging of radiative neutron captures following antineutrino charged-current interactions. We report on the status of these studies and discuss the potential impact of the upgrade.

        Orateur: Seungho Han (Kyoto University)
        sk_flavor_2025_han.pdf
      • 44
        MicroBooNE
        Orateur: Patrick Green (University of Oxford)
        25.08.21_RdV_MicroBooNE_Overview.pdf
      • 45
        Latest Results from the ICARUS Experiment at the Short-Baseline Neutrino Program

        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 ICARUS collects neutrino interactions from both the Booster Neutrino Beam (BNB) and off-axis from the Main Injector Neutrino beam (NuMI). To date, ICARUS has accumulated approximately 5.9·1020 protons on target (POT) with the BNB and about 6.3·1020 POT with NuMI. Within the SBN program ICARUS will search for evidence of short-baseline oscillations, potentially explained by eV-scale sterile neutrinos, jointly with the Short-Baseline Near Detector (SBND). In addition, ICARUS is performing stand-along oscillation searches in disappearance mode and measuring neutrino cross sections on argon with both the BNB and NuMI beams. It is also performing searches for additional Beyond the Standard Model signatures. Preliminary results from the ICARUS experiment, using data from the BNB and NuMI neutrino beams, will be presented.

        Orateur: Alice Campani
        flavor_conference_AliceCampani_21082025.pdf
    • 12:00
      Lunch
    • Neutrino Physics: Thursday Afternoon
      • 46
        SBND
        Orateurs: Patrick Green (University of Oxford), Supraja Balasubramanian (suprajab@mtholyoke.edu)
        25.08.21_RdV_SBND_Status.pdf
      • 47
        Status and Recent Results from the KM3NeT Neutrino Telescope

        The KM3NeT neutrino telescope is a next-generation research infrastructure currently under construction in the Mediterranean Sea. It aims to address fundamental questions in neutrino and astroparticle physics. The facility consists of two deep-sea detectors: ARCA (Astroparticle Research with Cosmics in the Abyss) and ORCA (Oscillation Research with Cosmics in the Abyss). ARCA is located offshore from Sicily at a depth of 3500 metres and optimized for detecting high-energy cosmic neutrinos in the TeV–PeV range. ORCA is deployed near Toulon, France, at a depth of 2500 metres. It is designed for precision studies of atmospheric neutrinos in the GeV range.
        Both detectors consist of vertical detection units, each supporting 18 Digital Optical Modules (DOMs) — pressure-resistant glass spheres housing 31 photomultiplier tubes capable of detecting Cherenkov light induced by charged particles resulting from neutrino interactions in the surrounding seawater.
        Though still under construction, both ARCA and ORCA are already operational in partial configurations and acquiring data. Early results highlight their growing capabilities and potential to contribute broadly to neutrino and astroparticle physics.
        This presentation will summarize the current status of KM3NeT, showcase recent results from ARCA and ORCA, and outline the future scientific capabilities of the telescopes.

        Orateur: Gogita Papalashvili (INFN - Sezione di Bari)
        Talk_RencontresduVietnam_KM3NeT_Papalashvili.pdf
      • 48
        JUNO
        Orateur: Achim Stahl (RWTH Aachen University)
        JUNO-Stahl-V03.pptx
      • 49
        DUNE
        Orateur: Ioana Caracas (JGU Mainz)
        IoanaCaracas_VietnamFlavorConferece.pdf
      • 14:50
        Coffee Break
      • 50
        Hyper-K
        Orateur: Nick Prouse (Imperial College London)
        NProuse_HyperK_VietnamFlavour.pdf
      • 51
        LEGEND: Searching for Neutrinoless Double-Beta Decay with Germanium Detectors

        Neutrinoless double-beta decay (0νββ) provides an exciting avenue for probing the absolute neutrino mass and the Majorana nature of the neutrino. Regardless of the mechanism involved in its production, the observation of 0νββ implies new physics, exhibiting lepton number violation, and providing insight into the matter-antimatter asymmetry in the universe. Ge detector technology is extremely well suited for this challenge. The Large Enriched Germanium Experiment for Neutrinoless Double-beta Decay (LEGEND) is making use of this technology to search for 0νββ in Ge-76-enriched detectors in the first phase of its experimental program, LEGEND-200. LEGEND builds on key technological innovations from GERDA and the MAJORANA DEMONSTRATOR, and aims to pursue a tonne-scale Ge-76 experiment in the next phase of its experimental program, LEGEND-1000. In this talk, an overview of the LEGEND experimental program will be presented, along with the 0νββ limit resulting from the combined analysis of the final GERDA and MAJORANA DEMONSTRATOR and first LEGEND-200 data sets.

        Orateur: David Hervas Aguilar (Technical University Munich)
        2025-08-21-hervas-flavor-vietnam.pdf
      • 52
        Flavored Leptogenesis via Scalar Doublet Decay in the Scotogenic Model

        The scotogenic model is a minimally extended model that generates small neutrino masses through radiative corrections in the dark sector. It is also known to account for the baryon asymmetry of the Universe through the decay of right-handed neutrinos. In this work, we explored an alternative leptogenesis scenario in which the scalar doublet decays into a right-handed neutrino and a lepton doublet. We calculated the resulting baryon asymmetry, considering flavor effects. As a result, we identified viable parameter regions for the masses of the right-handed neutrino and the scalar doublet, as well as for their couplings, that reproduce the observed baryon asymmetry.

        Orateur: Yurika Sekikawa (Yokohama National University)
        vietnum2025_sekikawa.pdf
      • 53
        Neutrino-Nucleus Interactions
        Orateur: Minoo Kabirnezhad (Imperial College London)
        Flavour_2025.pdf
      • 54
        Discussion
    • 18:30
      Bus Pick-Up at Hotel 6.30pm
    • 19:00
      Dinner at a fancy restaurant in downtown Quy Nhon
  • ven. 22 août
    • BSM and Dark Sector Physics: Friday Morning
    • Modern Methods in Experiment and Analysis
    • 12:00
      Lunch
    • Neutrino Physics: Friday Afternoon
    • BSM and Dark Sector Physics
      • 59
        Introduction to BSM and Dark Sector Physics
        Orateur: Lorenzo Calibbi (Nankai University)
        calibbi-vietnam-2025.pdf
      • 60
        Search for Baryogenesis and Dark Matter in B-meson decays at BABAR

        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 of the kind $B\to\psi_{D} {\cal B}$, where $\cal{B}$ is an ordinary matter baryon (proton, $\Lambda$, or $\Lambda_c$) and $\psi_D$ is a dark-sector anti-baryon, with branching fractions accessible at the $B$ factories. The hadronic recoil method has been applied with one of the $B$ mesons from $\Upsilon(4S)$ decay fully reconstructed, while only one baryon is present in the signal $B$-meson side. The missing mass of signal $B$ meson is considered as the mass of the dark particle $\psi_{D}$. Stringent upper limits on the decay branching fraction are derived for $\psi_D$ masses between 0.5 and 4.3 GeV/c$^2$. The results are based on the full data set of about 470 million $B-\overline B$ pairs collected at the $\Upsilon(4S)$ resonance by the BABAR detector at the PEP-II collider.

        Orateur: Steven Robertson (IPP / UofA)
        RdVietF_Robertson.pdf
      • 61
        Tau physics and dark sector searches at Belle II
        Orateur: Jing-Ge Shiu (National Taiwan University)
        VFPC2025_v2.1.pdf
      • 16:10
        "Fruit Party" on the beach
      • 63
        Prospects for Long Lived Particle searches with the MATHUSLA experiment

        Long Lived Particles (LLPs) are predicted in many models of possible physics beyond the Standard Model which seek to explain key questions in modern physics. The MATHUSLA experiment is a proposed LLP detection experiment for the CERN Large Hadron Collider (LHC). Consisting of a large decay volume instrumented with layers of scintillator tracking detectors positioned on the surface approximately 100m from one of the LHC interaction points, MATHUSLA seeks to reconstruct the decay vertices of neutral LLPs which penetrate the LHC overburden to decay within the detector volume. Planning is currently underway for a 10m x 10m x ˜16m demonstrator module, which may ultimately become the first of 16 such modules comprising a 40m x 40m detector (referred to as “MATHUSLA-40”). The physics motivation and expected sensitivity for this detector will be presented, and ongoing MATHUSLA detector development work will be summarized.

        Orateur: Steven Robertson (IPP / UofA)
        MATHUSLA_Robertson.pdf
      • 64
        Do minimal 331 models still hold up?
        Orateur: Giulia Ricciardi
        ricciardi331.pdf
      • 65
        Discussion and Closing
    • 18:30
      Bus Pick-Up at Hotel 6.30pm
    • 19:00
      Dinner at another fancy restaurant in downtown Quy Nhon
  • sam. 23 août
    • 66
      Optional Post-Conference Chat ANYA Hotel Breakfast → Pool?

      ANYA Hotel Breakfast → Pool?

      Come and talk to us about what you thought about the conference, what can be done better in 2028

      Orateurs: Nazila Mahmoudi (Lyon University), Prof. Yoshi Uchida (Imperial College London)
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