Login

(Re)interpretation of the LHC results for new physics

12–15 Dec 2022
CERN
Europe/Paris timezone

Contribution List

53 out of 53 displayed
Export to PDF
  1. 36. Welcome & introduction
    Sabine Kraml (LPSC Grenoble)
    12/12/2022, 10:00
  2. 7. Preservation and reuse of BSM searches: ATLAS review
    Yvonne Ng (Deutsches Elektronen-Synchrotron (DE))
    12/12/2022, 10:10
  3. 8. Preservation and reuse of BSM searches: CMS review
    Sitian Qian (Peking University (CN))
    12/12/2022, 10:35
  4. 11. Preservation and reuse of BSM searches: discussion
    12/12/2022, 11:00
  5. 9. Preservation and reuse of SM (incl. top, Higgs, etc) measurements: ATLAS review
    Matous Vozak (Nikhef National institute for subatomic physics (NL))
    12/12/2022, 11:35
  6. 10. Preservation and reuse of SM (incl. top, Higgs, etc) measurements: CMS review
    Markus Seidel (Riga Technical University (LV))
    12/12/2022, 12:00
  7. 12. Preservation and reuse of SM (incl. top, Higgs, etc) measurements: discussion
    12/12/2022, 12:25
  8. 17. News from HEPData
    Graeme Watt
    12/12/2022, 12:40
  9. 39. CERNs Open Science Policy: background and practical implementations
    Sunje Dallmeier-Tiessen (CERN)
    12/12/2022, 14:30

    On October 1st 2022 the CERN Open Science Policy came in force. The policy has been developed by an organisation wide working group and contains nine chapters focusing on the different elements of Open Science. It is available here: https://cds.cern.ch/record/2835057
    This presentation will briefly outline the background of the policy development, provide more details on the policy’s content...

    Go to contribution page
  10. 2. New developments in MadAnalysis 5
    Jack Y. Araz (IPPP - Durham University)
    12/12/2022, 14:55

    MadAnalysis 5 is a framework for phenomenological investigations at particle colliders. Based on a C++ kernel, this program allows to efficiently perform, in a straightforward and user-friendly fashion, sophisticated physics analyses of event files such as those generated by a large class of Monte Carlo (MC) event generators. This talk will focus on recent developments in MadAnalysis'...

    Go to contribution page
  11. 22. Implementation of multi-bin searches in CheckMATE
    Iñaki Lara Perez
    12/12/2022, 15:15

    The use of the combination of information from independent signal regions in statistical tests in high energy physics gives stronger and more robust limits that single-binned analysis. We present the implementation of multi-binned analysis in CheckMATE based on a PYHF implementation of simplified likelihoods. This methods turns out to be superior to the usual limits calculated by CheckMATE...

    Go to contribution page
  12. 31. Analyses combination in SModelS
    Wolfgang Waltenberger (Austrian Academy of Sciences (AT))
    12/12/2022, 15:35

    We report on new developments in SModelS, in particular the functionality of analyses combination introduced in v2.2.

    Go to contribution page
  13. 52. Introduction
    Sabine Kraml (LPSC Grenoble)
    12/12/2022, 16:30
  14. 33. Machine learning model serialization experiences
    Dan Guest (Humboldt University of Berlin (DE))
    12/12/2022, 16:40
  15. 20. Reusing Neural Networks: Lessons learned and Suggestions for the future
    Tomasz Procter (University of Glasgow (GB))
    12/12/2022, 17:00

    I present the lessons learned as re-interpreters trying to reuse analyses centred on neural networks in the RIVET framework, using two recent ATLAS analyses -- SUSY and Exotics searches -- as examples. I survey the possible ways that an analysis team can preserve and publicise their neural network for future use, and provide a detailed examination of the ONNX and lwtnn preservation tools,...

    Go to contribution page
  16. 23. Implementation of ML searches in CheckMATE
    Krzysztof Rolbiecki (Warsaw University)
    12/12/2022, 17:20

    I will discuss a recent CheckMATE implementation of ATLAS searches using MVA/BDT and NN methods.

    Go to contribution page
  17. 49. CMS inputs on ML models re-usability
    Jennifer Ngadiuba (FNAL)
    12/12/2022, 17:40
  18. 50. Publication and reuse of ML models for recasting - discussion
    All
    12/12/2022, 17:55

    Discussion of technical and conceptual questions around the publication and reuse of ML models for recasting. Time is indicative.

    Go to contribution page
  19. 14. LHCb
    Federico Leo Redi (CERN)
    13/12/2022, 10:00
  20. 15. Belle-II
    Slavomira Stefkova
    13/12/2022, 10:30
  21. 24. Recasting DM direct detection results
    Knut Morå (Columbia University)
    13/12/2022, 11:20

    Searches for dark matter scattering in direct detection experiments are commonly reported for only a limited set of interactions and theory parameters. As experiments construct more complex analysis techniques with several analysis dimensions, approximating results for alternate signal models can become more difficult. In this presentation, I will review some typical direct detection...

    Go to contribution page
  22. 40. Analysis preservation in heavy-ion collisions experiments
    Antonio Carlos Oliveira Da Silva (University of Tennessee - Knoxville)
    13/12/2022, 11:50
  23. 42. Publishing Statistical Models Overview
    Matthew Feickert (University of Wisconsin Madison (US))
    13/12/2022, 14:00

    Brief overview of the state of the field for publishing statistical models and setting the goals for the discussion.

    Go to contribution page
  24. 43. Open Statistical Models : CMS Viewpoint
    Andrea Carlo Marini (CERN)
    13/12/2022, 14:15
  25. 48. Reproducing a CMS higgsino search from public data
    William Ford (University of Colorado Boulder (US))
    13/12/2022, 14:35
  26. 45. Statistical Model Conversion between HistFactory and CMS Combine
    Alexander Held (University of Wisconsin Madison (US)), Kirill Skovpen (Ghent University (BE))
    13/12/2022, 14:55
  27. 44. High Energy Physics Statistics Serialization (HS3)
    Dr Carsten Burgard (Technische Universitaet Dortmund (DE)), Jonas Rembser (CERN)
    13/12/2022, 15:55
  28. 53. ATLAS SimpleAnalysis
    Dr Giordon Holtsberg Stark (University of California,Santa Cruz (US)), Mike Hance (UC Santa Cruz)
    13/12/2022, 16:30
  29. 54. General analysis-code discussion
    Andy Buckley (University of Glasgow (GB))
    13/12/2022, 17:00
  30. 38. Report from the LHC EFT WG
    Ilaria Brivio (University of Zurich)
    14/12/2022, 10:00
  31. 18. Unbinned multivariate observables for global SMEFT analyses from machine learning
    Jaco ter Hoeve
    14/12/2022, 10:25

    Theoretical interpretations of particle physics data, such as the determination of the Wilson coefficients of the Standard Model Effective Field Theory (SMEFT), often involve the inference of multiple parameters from a global dataset. Optimizing such interpretations requires the identification of observables that exhibit the highest possible sensitivity to the underlying theory parameters. In...

    Go to contribution page
  32. 34. LHC Measurements in Global SFitter Analyses
    Tilman Plehn
    14/12/2022, 10:45
  33. 21. Collider constraints on electroweakinos in the presence of a light gravitino with GAMBIT
    Tomasz Procter (University of Glasgow (GB))
    14/12/2022, 11:05

    Using GAMBIT, we show that present collider data is not only consistent with low-scale supersymmetry, but permits scenarios where the masses of all six neutralinos and charginos of the MSSM are well below a TeV. We constrain the $\tilde G$-EWMSSM -- the MSSM with an eV-scale gravitino as the lightest supersymmetric particle and the six electroweakinos as the only other light new states --...

    Go to contribution page
  34. 27. Combining orthogonal LHC new physics searches.
    James David Yellen (University of Glasgow (GB))
    14/12/2022, 11:25

    The combination of LHC results is of great relevance if we want to obtain a deeper more comprehensive understanding of the data collected by the experiments. In practice, it would allow us to derive stronger limits on Beyond Standard Model (BSM) theories, and to perform searches for dispersed signals, as well searching for deviations from the Standard Model in the observed data. However, the...

    Go to contribution page
  35. 37. ADL/CutLang developments towards large scale (re)interpretation
    Gokhan Unel (University of California Irvine (US))
    14/12/2022, 14:00

    We report recent developments in Analysis Description Language (ADL) and the runtime interpreter CutLang in view of (re)interpretation studies. We present an infrastructure setup dedicated to a large scale LHC analysis validation functionality and the ongoing collective efforts to implement and validate a number of LHC BSM searches. We also highlight several ongoing innovative core...

    Go to contribution page
  36. 56. The big picture
    Lukas Alexander Heinrich (Max Planck Society (DE))
    14/12/2022, 14:20
  37. 57. Overlap handling
    Tomas Dado (Technische Universitaet Dortmund (DE))
    14/12/2022, 14:40
  38. 13. Machine Learning LHC likelihoods
    Humberto Reyes-González (University of Genoa)
    14/12/2022, 16:00

    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...

    Go to contribution page
  39. 28. Automated Collider Event Analysis, Plotting, and Machine Learning with AEACuS, RHADAManTHUS, and MInOS
    Joel Walker (Sam Houston State University)
    14/12/2022, 16:20

    A trio of automated collider event analysis tools are described and demonstrated. AEACuS interfaces with the standard MadGraph/MadEvent, Pythia, and Delphes simulation chain, via the Root file output. An extensive algorithm library facilitates the computation of standard collider event variables and the transformation of object groups (including jet clustering and substructure analysis)....

    Go to contribution page
  40. 47. Tutorial: MaPyDe + ATLAS SimpleAnalysis
    Dr Giordon Holtsberg Stark (University of California,Santa Cruz (US))
    14/12/2022, 16:40

    A tutorial of a full reinterpretation pipeline using MaPyDe, with a reproduction pipeline by incorporating ATLAS SimpleAnalysis

    Go to contribution page
  41. 1. A Novel Experimental Search Channel for Very Light Higgses in the 2HDM Type I
    Souad Semlali (School of Physics and Astronomy, University of Southampton)
    15/12/2022, 10:00

    We present a reinterpretation study of existing results from the CMS Collaboration, specifically, searches for light Beyond the Standard Model (BSM) Higgs pairs produced in the chain decay $pp\to H_{\rm SM}\to hh(aa)$ into a variety of final states, in the context of the CP-conserving 2-Higgs Doublet Model (2HDM) Type-I. Through this, we test the LHC sensitivity to a possible new signature,...

    Go to contribution page
  42. 6. Global fits of simplified models for dark matter with GAMBIT
    Christopher Chang
    15/12/2022, 10:20

    Dark matter candidates can arise from a wide range of extensions to the Standard Model. Simplified models with a small number of new particles allow for the optimisation and interpretation of dark matter and collider experiments, without the need for a UV-complete theory. In this talk, I will discuss the results from a recent GAMBIT study of global constraints on vector-mediated simplified...

    Go to contribution page
  43. 4. LHC constraints on monojet signatures from electroweakino DM and coloured-superpartner decays
    Iñaki Lara Perez
    15/12/2022, 10:40

    We revisit LHC searches for heavy invisible particles. First recasting a dijet signal region in a general multijet plus missing transverse momentum analysis by ATLAS. We find that non-trivial mass limits can be obtained for the Wino and Higgsino LSP scenarios with the present data. We then study monojet/dijet channels as a tool for searching for squarks and gluinos with distinct mass...

    Go to contribution page
  44. 19. Probing the flavor of new physics in semileptonic transitions at high-pT
    Felix Wilsch (University of Zurich)
    15/12/2022, 11:00

    High-$p_T$ tail observables at the LHC offer a complementary probe to low-energy experiments for studying the flavor structure of the Standard Model and beyond. We discuss the high-$p_T$ tails of neutral- and charged-current Drell-Yan processes to probe New Physics (NP) effects in semileptonic transitions. For this purpose, we describe the relevant cross-sections in terms of general...

    Go to contribution page
  45. 26. Constraining Dimension7/9 SMEFT from reinterpreting same sign dilepton analysis at CMS
    Sitian Qian (Peking University (CN))
    15/12/2022, 11:40

    The Standard Model Effective Field Theory (SMEFT) provides a model-independent description to the collider events, from which the measured Wilson coefficients can be interpreted with some specific BSM model and vice versa. In the context of SMEFT, operators constructed with odd dimensions may lead to Lepton Number Violation (LNV). In this work, we will present the results of reinterpreting...

    Go to contribution page
  46. 3. Model independent measurements of standard model cross sections with domain adaptation
    Benedetta Camaiani (Universita e INFN, Firenze (IT))
    15/12/2022, 12:00

    With the ever growing amount of data collected by the ATLAS and CMS experiments at the CERN LHC, fiducial and differential measurements of the Higgs boson production cross section have become important tools to test the Standard Model predictions with an unprecedented level of precision, as well as seeking deviations that can manifest the presence of physics beyond the standard model. These...

    Go to contribution page
  47. 25. Efficient search for new physics using Active Learning in the ATLAS Experiment with RECAST
    Irina Espejo Morales (New York University)
    15/12/2022, 12:20

    Searches for new physics and their reinterpretations constrain the parameter space of models with exclusion limits in typically only few dimensions. However, the relevant theory parameter space often extends into higher dimensions. Limited computing resources for signal process simulations impede the coverage of the full parameter space. We present an Active Learning approach based on the...

    Go to contribution page
  48. 5. Reinterpretation of CMS search for LLPs using endcap muon detectors
    Christina Wenlu Wang (California Institute of Technology (US))
    15/12/2022, 12:40

    We present the recast and sensitivity projection in a large number of benchmark models, significantly extending the physics scope of the recent search for LLPs using the CMS endcap muons detector (https://arxiv.org/abs/2107.04838). The search uses the endcap muon detectors as sampling calorimeter to identify displaced showers produced by decays of long-lived particles (LLPs). The exceptional...

    Go to contribution page
  49. 55. General discussion
    15/12/2022, 14:30

    Renewal of the RIF Steering Group, how to move forward, next workshop, ....

    Go to contribution page
  50. 30. CheckMATE
    Iñaki Lara Perez (Warsaw University)
  51. 46. CMS Combine public release
    Nicholas Wardle (Imperial College (GB))
  52. 51. discussion
    all
  53. 32. Rivet/Contur