1 / 4

Generators

Generators. ATLAS and CMS choices (LHCb, LHCf…); TOTEM strategies. Federico Ceccopieri. Generators. ATLAS : PYTHIA (8.0), (PHOJET), JIMMY+HERWIG … “Modelling Underlying Events and Minimum Bias Physics” J.Butterworth http://indico.cern.ch/conferenceDisplay.py?confId=a042085

Download Presentation

Generators

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Generators • ATLAS and CMS choices (LHCb, LHCf…); • TOTEM strategies. SW TOTEM Meeting 4/12/07 Federico Ceccopieri

  2. Generators • ATLAS : PYTHIA (8.0), (PHOJET), JIMMY+HERWIG … • “Modelling Underlying Events and Minimum Bias Physics” • J.Butterworth • http://indico.cern.ch/conferenceDisplay.py?confId=a042085 • “Prediction for minimum bias and the underlying event • at LHC energies” . Moraes , C. Buttar , I. Dawson , 2007 Eur.Phys.J.C50:435-466,2007. SW TOTEM Meeting 4/12/07 Federico Ceccopieri

  3. Generators • CMS :PYTHIA, POMWIG, EXHUME … • “Minumum Bias at CDF and CMS” Rick Field  • “Pythia settings used in CMS official production”, P.Bartalini • http://indico.cern.ch/conferenceDisplay.py?confId=4081 • “Exhume and Pomwig in CMSSW” A. Vilela Pereira • http://indico.cern.ch/conferenceDisplay.py?confId=17652 SW TOTEM Meeting 4/12/07 Federico Ceccopieri

  4. Generators • No available tuning will be probably “ok” for LHC, due to uncertainties in energy extrapolation of UE and MB in the • MC underlying models. • Use Monte Carlo as error bands : Obs∈ [PHOJET, PYTHIA] • TOTEM : elastic cross-section → total cross-section → unitarity → obtain constraint on multiple interactions; • TOTEM : Test ifleading baryon spectrum is affected by “rescattering”; same spectrum as observed at HERA? • (No help from CDF due to a restricted ξ-range). • Measure all ξ<0.2 not just at the diffractive peak • → test factorization breaking in a wide ξ –range, if any!! SW TOTEM Meeting 4/12/07 Federico Ceccopieri

More Related