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Les Houches

2019 Session

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LH 2019: Topics for Consideration

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session 1

  • Loops,Multilegs,Jets
  • PDFs:
    • dealing with scale uncertainties in PDF fits
    • benchmark studies for current generation of PDFs, e.g. top distributions
    • dealing with tensions in LHC data, i.e. ATLAS jets vs CMS jets, top distributions
      • does each group have the same reaction to the tensions?
      • how to get the greatest knowledge from distributions with tensions?
    • dealing with NNLO grids (NNLOJET)
  • Parton Showers:
    • LH17 showed that PS predictions agree well with each other when input parameters are synchronized; reasonable physics choices then lead to differences; can we establish the limit of what these reasonable physics choices are?
  • ME+PS:
    • better understanding of limits of precision for ME/ME+PS calculations
    • uncertainties in matching PS with ME
    • better understanding of 'reasonable' scale uncertainties at NNLO
    • precision predictions in the high pT frontier
  • Progress with higher order calculations:
    • any benchmarking, for example DY at NNLO?
    • improvements for evaluation of 2→2 at NNLO
    • loopedia
    • outlook for 2→3 NNLO
    • 3-loop, e.g. Higgs rapidity
    • compact expressions at the amplitude level
    • ntuples for NNLO
  • Jets: Where is quark/gluon discrimination useful? How does it perform? Examples:
    • PDFs
    • VBF
    • X→gg
    • Susy cascades
    • ISR tagging
    • W tagging
    • top tagging
  • Higgs
  • SM Issues
    • Parton shower and underlying event related systematics in Higgs measurements for signal and background (together with Loops,Multilegs,Jets)
    • Prospect of quark/gluon jet tagging for VBF (synergy with Jets session)
    • Predictions+uncertainty models for backgrounds to ttH production: tt+HF, ggH+HF, tt+V
    • Background function choice for H→gamgam and H→mumu: how to evaluate the functional choice systematics
    • STXS:
      • Brainstorming on “STXS for Higgs decays” or something similar for decay propery measurements
      • Updates on STXS for production
    • Probing Higgs Width and Top Quark Yukawa Coupling from ttH and tttt
    • Higgs pair production and self-coupling observables, top quark mass-scheme uncertainties
    • EFT description of Higgs production
  • MC and Tools
    • ttbar: mismodeling of top pt and an angular distributions
    • W-mass and precise EW measurements: where are the bottlenecks?
    • …more to come…

session 2

  • Higgs: new physics
    • Higgs pairs: lambda_HHH from single & double;
    • VBF Higgs pairs: C2v, Cv relation
    • Rare decays: benchmark for H→aa→gamgamgamgam
    • Rare and exotic Higgs decays: further channels not searched for? motivation in specific BSM scenarios?
    • CP violation and Higgs: (HL-)LHC sensitivity, complementarity with other probes (e.g. EDMs)
    • Lighter than 125 GeV scalars: how well are they covered by LHC and LEP?
    • Interpretation of SM coupling/STXS constraints in BSM benchmarks
    • MSSM: how to close the gap in the high mA (>= 500 GeV), intermediate tan(beta) range?
    • Precision measurements to sharpen interpretation of Higgs results (W mass, TGCs, W/Z coupling to quarks, CKM …)
    • New physics at the high-energy tail of Higgs distributions
  • Precision physics at the LHC
    • Precision measurements of Z and W couplings to quarks
    • Lepton flavor violation in W decays
    • Measurement of CKM elements
    • High-energy tail of Drell-Yan production
  • New Physics
    • VLQs beyond V/Hq decays
    • Unconventional signatures
    • Complex DM and colliders
  • Flavour anomalies
    • High pT searches connected with the flavour anomalies
    • Optimized leptoquark and Z' searches
    • Tail of the di-leptons distributions
  • BSM and Machine Learning
    • Determination of model parameters
    • 2d/3d/4d Image analysis for HEP e.g. jets
    • New Searches with ML (search algorithms, generic searches, automatisation, density estimation, deep networks / auto-encoders etc.)
    • Learning Phenomenally predictions (limits, likelihoods, cross sections)
    • Generative models for HEP
  • Tools&MC
    • Global fits / recasting / scanning spaces
    • Analysis preservation
    • LLP and resonance searches
    • Simplified likelihoods and EFT explorations
    • Beyond EFT: unitarity, exploring the continuum between EFT→full models
    • BSM modelling with MC
    • Future colliders
2019/topics.1544437395.txt.gz · Last modified: 2018/12/10 11:23 by fawzi.boudjema