Tools and Monte-Carlo for the SM and BSM Working Group                    Session I & II: 30 May-17 June 2011

Session I : Standard Model   (30 May to 8 June)
Session II: BSM (8 June to 17 June)

This working group will liaise with the  SM and New Physics WGs with the task of incorporating some of the issues and new techniques developed in these groups in view of improving Monte Carlos and setting standards and accords among the simulation codes to better meet the experimental needs.   Issues concerning pdf and jets will also be covered within this WG. In session I the emphasis will be on standard model issues in close connection with the SM/NLO Working Group while in sessions II the emphasis will be on the implementation of new models.

TH Conveners:

F. Krauss
(IPPP, Durham, UK),   F. Maltoni, (Louvain, Belgium),   P. Richardson (IPPP, Durham, UK) and P. Skands (CERN, CH
Exp Conveners:
E. Nurse, (UC London, UK)
New Physics F. Moortgat (ETH Zurich, CH)

Some topics (many of these are strongly correlated with the studies in the SM and BSM WG)

more SM
  • Tuning and Validation
  •  Models for UE and MI : tuning
  •  UE/MI  tuning in the presence of matching
  •  Inclusion of the LHC data (including jets)
  •  Background estimation from data : new techniques, event samples, extrapolations...

  •  Tools for advanced (multivariate) analyses and TH/EXP comparisons
  •  Matrix Element Reiweighting method
  •  Data correction and unfolding
  •  TH/EXP comparisons : how to? (particle level, with QED FSR, EW corrections..)

  •  Automation of NLOwPS
  •  Status and directions
  •  New accords?
  •  Tools availabibility
  •  Loop benchmark point library
  •  Systematic uncertainties in ME+PS and  NLOwPS
  •  Matching Benchmarks
  •  Common recommendations to evaluate uncertainties

  •  Parton Densities
  •  PDFs in NLOwPS 
  •  Heavy quark PDF's

More BSM

  • Purely technical: how to go from Lagrangian to hadron-level events. Places to extend, improve or consolidate frameworks/interfaces?
  •  Tools for dark matter. From model to constraints to LHC signatures.
  •  Generic experimental acceptance calculators: DELPHES, PGS, ... , for comparison with generic cross section x branching fraction limits.
  • NLO for BSM processes: status of tools? Cases where NLO is mandated.
  •  Multi-jet matched samples for BSM backgrounds. When is ME+PS neededfor BSM signals?
  • how MC models of soft-QCD (UE, diffraction, MB) really affect the high pT physics programme (in various SM and BSM  analyses).
  •  Boosted resonance decays vs Jet substructure. How well is QCD really known for this? Is matching to fixed-order (hard) matrix elementsenouhh? Do we risk hitting uncontrolled subleading logs?
  • Radiation in processes with new kinds of colour structures, e.g.,
  • sextets / colour epsilon tensors.
  •  Radiation in new non-QCD sectors, like hidden valleys. Hadron spectra in new confining models. Quirks, technicolor / holographic models, ...
  • Processes where the narrow-width approximation breaks down, possibly in combination with large interference effects between signal and backgrounds. (Wide resonances.)
  • Description of decay chains interspersed with radiation off multipleintermediate massive states. Especially when the states are quite wide.
  • Spin correlations and model discrimination