User Tools

Site Tools


Les Houches

2023 Session

Wikis of Previous sessions

Les Houches Themes



Preliminary list of topics for 2021

(accessible to everyone, editing rights to conveners and organizers)

Session 1

Jet substructure techniques:

  • Interplay of jet substructure with other groups (e.g. jet substructure for EW measurements like VBF, semileptonic VV, etc.)
  • Snowmass jet substructure report (JSS at future colliders) [work + discussion]
  • What can we do with previous colliders, in light of the LHC [discussion]
  • Comparing new unfolding methods
    • Accord on unbinned results (?)
  • Probing the latest MC generators (PB algorithm, PANScales, Deductor…) with jet substructure
    • Finite N_C, beyond LL, …

Techniques and calculations for SM phenomenology:

` * Calculations:

  • expected precision for fundamental Standard Model processes at 14 and 100 TeV; what calculations are needed to match this precision?
  • 2→3 at NNLO; status/challenges/prospects
  • theory uncertainties; more rigorous estimates? correlations?
  • theoretically sound definition of FONLL at the differential level, beyond incl. cross sections?
  • PDFs:
    • followup on PDF4LHC15 benchmarking exercise; better understanding of tolerances, tensions
    • EW corrections/EW PDFs; how to provide consistent calculations
    • small x resummation; what is HERA trying to tell us?
    • EIC; what will EIC tell us? how do we prepare for that?
  • Higgs:
    • understanding the SM for high Higgs pT; role of top mass corrections/scheme (MSbar vs on-shell); improving channel sensitivities
    • polarisation measurements (for diboson/VBS as well)
  • Top:
    • MSbar vs on-shell
    • ttW; tension; can new calculations resolve it?
  • Jets:
    • flavor tagging of jets; matching what theorists can predict (IR safety) and what experimentalists can measure

Monte Carlo:

  • Non-perturbative uncertainties
    • common hadronisation interface and variations
    • theoretical understanding
    • differences in tuned comparisons
    • pheno impact for certain classes of processes (e.g. VBF/VBS)
  • Shower accuracy studies
    • comparing different schemes on higher orders, evaluate phenomenological impact
    • Subleading colour and interplay with colour reconnection
    • New sampling methods and algorithms versus machine learning techniques
    • Accuracy of merging resummed calculation versus ME+PS paradigms
  • Photon physics, modelling of fragmentation
  • Heavy flavour matching
    • review of existing measurements
    • Connecting precision calculation, fragmentation and decays
    • partons at 100 TeV
  • Common LHC event bazaar
  • Status and needs for electroweak corrections and radiation in shower algorithms
  • Machine learning and adaptive Monte Carlo methods

SM Higgs Topics:

  • ggF
    • N3LO PDFs, small-x
    • EW corrections
    • cuts/differential distributions
  • B-quark issues
    • Ttbb, V+HF, VH
    • 4FNS vs 5FNS: bbH, t/H/Z+j QCD EW…
    • Flavour jet algo\
  • ggVV
    • Massive results [if we’ll have them, probably yes]
  • VBF
    • Factor vs non-factor: TH vs EXP discussion on cuts etc (especially Run3)
  • Jet-ology
    • NNLO+NLO res, VH+J, NNLO+decay & fiducial studies
  • HH
    • EFTs, H vs HH
  • In general, EFT fits etc
  • Exp vs theory efficient information exchange
    • Likelihood, discriminators as black box
    • Differential distribution. TH insight for measurements…
  • PS issues (SLC, higher logs…, liaise with QCD)
  • New opportunity for Run3 (unexplored regions, != cuts etc)
  • STXS
    • for decays - binned proposal
  • FO/Boosted
    • NLO-Improved NNLO HTL predictions for gg → H(→yy)+Jet in the fiducial region, experimental sensitivity to different decay channels as a function of pt
    • Mixed QCD-EW contributions to higgs (e.g. 2010.09451, 2007.09813)
  • Backgrounds
    • Predictions+uncertainty models for backgrounds to ttH production: tt+HF, ggH+HF, tt+V, previous proposal was to estimate ttV EW correction in different phase space regions
  • 4FS/5FS
    • bbar → higgs (e.g. 2004.04752)
    • tHj tZj QCD+EW (e.g. 2006.10086), various 4FS/5FS matching issues to consider
  • Showers
    • New showers, subleading-colour issues with parton showers and possible effects on Higgs physics (PanSccales 2011.10054; Forshaw, Plätzer et al 2003.06400, 2007.09648, 2011.15087, 2012.15215)

Session 2

2021/topics.txt · Last modified: 2021/02/09 10:56 by fabrizio.caola