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IRN Terascale @ IP2I Lyon

13–15 Nov 2024
IP2I Lyon
Europe/Paris timezone

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Contribution List

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  1. 1. Welcome
    13/11/2024, 13:45
  2. 2. In memoriam Ulrich Ellwanger
    Ana Margarida TEIXEIRA (LPC Clermont), Dr Cyril Hugonie (LUPM), Jean Orloff (LPC Clermont, Univ. Blaise Pascal)
    13/11/2024, 13:50
  3. 38. Introduction
    Laurent Vacavant (IN2P3)
    13/11/2024, 14:30
  4. 21. Muon colliders
    Fabrice Balli (CEA Saclay), Fabrice Balli (CEA Saclay)
    13/11/2024, 14:35
  5. 22. ECFA summary
    Dirk ZERWAS (DMLab and IJCLab)
    13/11/2024, 14:55
  6. 23. ECFA theory overview
    Margarete Muehlleitner (ITP Karlsruhe)
    13/11/2024, 15:20
  7. 24. Perspectives on computing challenges
    Sabine Crépé-Renaudin (IN2P3)
    13/11/2024, 15:45
  8. 26. Sustainability issues
    Samuel Calvet (LPC)
    13/11/2024, 16:05
  9. 25. Early career researcher ECFA summary
    Louis D'Eramo (LPCA - Clermont)
    13/11/2024, 16:25
  10. 27. Discussion
    13/11/2024, 17:00
  11. 7. MicrOMEGAs 6: new developments and physics applications
    Andreas Goudelis (LPC - Clermont Ferrand)
    14/11/2024, 09:00
    Methods and Tools
    Methods and Tools

    MicrOMEGAs is a computer program to compute different dark matter observables. In this talk we will present some new features of its latest release, version 6, and discuss some of their physics applications.

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  12. 8. SModelS v3: Going Beyond Z2 Topologies
    Mohammad Mahdi Altakach
    14/11/2024, 09:25
    Methods and Tools
    Methods and Tools

    SModelS is a public tool for fast reinterpretation of LHC searches for new physics based on a large database of simplified model results. While previous versions were limited to models with a Z2-type symmetry, version 3 can now handle arbitrary signal topologies. To this end, the tool was fully restructured and now relies on a graph-based description of simplified model topologies. In this...

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  13. 10. Hyperiso: A general BSM calculator for flavour observables
    Niels FARDEAU, Théo REYMERMIER (IP2I Lyon + LPSC)
    14/11/2024, 09:50
    Methods and Tools
    Methods and Tools

    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. In...

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  14. 11. Machine Learning the likelihoods
    Rafal MASELEK (LPSC (Grenoble))
    14/11/2024, 10:10
    Methods and Tools
    Methods and Tools

    In recent years, the ATLAS collaboration has released full statistical models for some of their analyses, allowing for precise reinterpretation of experimental limits. These models incorporate numerous nuisance parameters and correlations between signal bins, but their complexity often results in prolonged computation times. This project seeks to develop a method for efficient yet accurate...

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  15. 17. Analyses surrogates and how to build them
    Abdelhamid Haddad (LPCA)
    14/11/2024, 11:00

    I will present the reinterpretation of the CalRatio + X ATLAS analysis (arXiv:2407.09183), focusing on neutral long-lived particles decaying within the ATLAS hadronic calorimeter. The reinterpretation involves a Boosted Decision Tree (BDT) trained on truth-level variables to estimate the probability of events within the ABCD plane and assess the sensitivity of the analysis. The BDT weights,...

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  16. 18. MadNIS
    Theo Heimel (Heidelberg)
    14/11/2024, 11:25

    Theory predictions for the LHC require precise numerical phase-space integration and generation of unweighted events. We combine machine-learned multi-channel weights with a normalizing flow for importance sampling to improve classical methods for numerical integration. By integrating buffered training for potentially expensive integrands, VEGAS initialization, symmetry-aware channels, and...

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  17. 19. Some non-axion solutions to the strong CP problem and their phenomenology
    Quentin BONNEFOY (Université de Strasbourg & IPHC, CNRS)
    14/11/2024, 11:50
    BSM

    While axions (which are very well-motivated) heavily dominate the amount of work currently done regarding the strong CP problem, alternatives ought to be systematically investigated, in order to assess what the strong CP problem really entails (and potentially update our theoretical biases). In this context, I will talk about solutions that rely on spontaneously broken spacetime symmetries,...

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  18. 12. Leptophilic Z' at the FCC-ee
    Baibhab Pattnaik (IFIC (CSIC-University of Valencia) and LPC)
    14/11/2024, 12:10
    BSM
    BSM

    We present the detection prospects of new Standard Model (SM)-neutral vector bosons ($Z_{\prime}$) that couple exclusively to leptons at the Future Circular Collider in the electron-positron stage (FCC-ee). We focus our search on $Z’$ production with a radiated photon, and show that FCC-ee can significantly extend the unprobed parameter space for this class of models in the kinematically...

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  19. 20. Quantum Tops: Quantum Information Meets High Energy Physics
    Yoav Afik (Enrico Fermi Institute, University of Chicago)
    14/11/2024, 14:00
    BSM

    The Standard Model of particle physics is a quantum field theory, based on quantum mechanics and special relativity. Therefore, it allows us to test fundamental properties of quantum mechanics. Top-quark pairs, which are generated at the LHC, are a unique high-energy system since their spin correlations can be measured. Thus, it is possible to study fundamental aspects of quantum mechanics...

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  20. 4. Search for Long Lived Particles at CMS
    Caroline COLLARD (IPHC (Strasbourg))
    14/11/2024, 14:25
    BSM
    BSM

    Depending on the length of the talk and the preference of the session conveners, the presentation could either focus on the search for heavy stable charged particles at CMS (work performed at IPHC) or cover a broader panel of LLP searches at CMS, associated to different experimental signatures in the detector.

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  21. 13. New LCSR B->K Form Factors determination
    Yann Monceaux (IP2I (Lyon))
    14/11/2024, 14:50
    BSM
    BSM

    Deviations from the Standard Model have long been observed in semileptonic B-meson decays, notably $b→ s \ell \ell$ transitions, triggering speculations on potential New Physics effects in this sector. Following recent updates of $R_{K^{(*)}}$ and $BR(B_{(s)} → μμ)$, and the first measurement of $R_\phi$ by the LHCb collaboration, the sole remaining significant deviations from the SM in...

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  22. 16. First-order phase transitions from a broken horizontal SU(2) gauge symmetry
    Anna CHRYSOSTOMOU (LPTHE)
    14/11/2024, 15:10
    BSM
    BSM

    Under certain conditions, a first-order phase transition during early-universe symmetry breaking can generate observable signals in the stochastic gravitational-wave (GW) background. Since the Standard Model (SM) predicts a cross-over phase transition, detectable signals are expected to arise from beyond the SM frameworks, traditionally testable only at colliders. Motivated by this...

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  23. 40. In memoriam: Rohini Godbole
    14/11/2024, 15:30
  24. 28. Latest Results from the XENONnT Dark Matter Experiment
    Ananthakrishnan RAVINDRAN
    14/11/2024, 16:15
  25. 29. First axion and dark photon dark matter searches with MADMAX
    Vijay Dabhi (CPPM, Marseille)
    14/11/2024, 16:45
  26. 30. DarkSide-20k sensitivity to light dark matter particles
    Pascal PRALAVORIO (CPPM, Aix-Marseille Université, CNRS/IN2P3)
    14/11/2024, 17:15
  27. 3. SMC meeting
    14/11/2024, 17:45
  28. 39. Dîner au Café des fédérations
    14/11/2024, 20:00
  29. 32. Introduction
    Christophe Ochando (LLR), Iro Koletsou (LAPP), Louis D'Eramo (LPCA - Clermont), Pietro Slavich (LPTHE Paris)
    15/11/2024, 09:30
  30. 33. Studies of the energy dependence of diboson polarization fractions and the Radiation Amplitude Zero effect in WZ production with the ATLAS detector
    Joany Manjarres Ramos (L2I Toulouse, UT3, CNRS/IN2P3)
    15/11/2024, 09:35
  31. 34. Heavy Higgs search in the 4l final state with CMS
    Mr Geliang Liu (Ecole polytechnique)
    15/11/2024, 09:55
  32. 35. HH searches at the HL-LHC in the bb𝝉𝝉 final state with ATLAS
    Minori FUJIMOTO (CPPM, Aix-Marseille Université, CNRS/IN2P3), Minori Fujimoto
    15/11/2024, 10:45
  33. 36. Higgs physics opportunities at the FCC
    Giovanni Marchiori (APC Paris)
    15/11/2024, 11:05
  34. 14. Linear Collider Facility - Introduction and Higgs programme below the ttbar threshold
    Imad Laktineh ({UNIV CLAUDE BERNARD}UMR5822)
    15/11/2024, 11:35

    The physics programme of linear e+e- colliders spans from the Z-Pole deep into the TeV range. Therefore, all Standard Model particles and their interactions are covered by the scientific programme of linear colliders. Beam polarisation allows for testing all aspects of the electroweak and the Higgs sector. New physics would lead to unique patterns of deviations from the Standard Model...

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  35. 15. Linear Collider Facility - Physics about ttbar threshold and outlook
    Roman Poeschl (LAL Orsay)
    15/11/2024, 11:55

    At energies above 500 GeV processes such as di-Higgs production or associated top-Higgs production open up. Both processes will profit from the clean environment of e+e- collisions that will allow for a direct measurement of the Higgs self-coupling and an unambiguous determination of the CP properties of the Higgs boson.
    The Higgs particle is intimately coupled to the top quark. Therefore,...

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  36. 31. Famous last words
    15/11/2024, 12:15
  37. 5. First axion and dark photon dark matter searches with MADMAX
    Pascal PRALAVORIO (CPPM, Aix-Marseille Université, CNRS/IN2P3)
    Dark Universe

    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, called booster,to enhance the axion-photon conversion probability over a significant mass range. In its final version MADMAX can scan...

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  38. 9. Latest Results from the XENONnT Dark Matter Experiment
    Mr Ananthakrishnan RAVINDRAN (SUBATECH, IMT Atlantique & The University of Melbourne)
    Dark Universe

    The XENONnT project is located in the Gran Sasso laboratory in Italy.
    Its main goal is the direct detection of dark matter, particularly
    Weakly Interacting Massive Particles (WIMPs). It uses a dual-phase
    liquid xenon time projection chamber (TPC) to identify particle
    interactions. When a particle interacts with the target mass, light (S1
    signal) and charge (S2 signal) are produced. The...

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