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/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/FastSimulation/Configuration/python/ttbar_cfi.py

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00001 import FWCore.ParameterSet.Config as cms
00002 
00003 source = cms.Source("EmptySource")
00004 
00005 generator = cms.EDFilter("Pythia6GeneratorFilter",
00006     comEnergy = cms.double(14000.),
00007     pythiaHepMCVerbosity = cms.untracked.bool(False),
00008     maxEventsToPrint = cms.untracked.int32(0),
00009     pythiaPylistVerbosity = cms.untracked.int32(0),
00010     PythiaParameters = cms.PSet(
00011         pythiaUESettings = cms.vstring('MSTJ(11)=3     ! Choice of the fragmentation function', 
00012             'MSTJ(22)=2     ! Decay those unstable particles', 
00013             'PARJ(71)=10 .  ! for which ctau  10 mm', 
00014             'MSTP(2)=1      ! which order running alphaS', 
00015             'MSTP(33)=0     ! no K factors in hard cross sections', 
00016             'MSTP(51)=7     ! structure function chosen', 
00017             'MSTP(81)=1     ! multiple parton interactions 1 is Pythia default', 
00018             'MSTP(82)=4     ! Defines the multi-parton model', 
00019             'MSTU(21)=1     ! Check on possible errors during program execution', 
00020             'PARP(82)=1.9409   ! pt cutoff for multiparton interactions', 
00021             'PARP(89)=1960. ! sqrts for which PARP82 is set', 
00022             'PARP(83)=0.5   ! Multiple interactions: matter distrbn parameter', 
00023             'PARP(84)=0.4   ! Multiple interactions: matter distribution parameter', 
00024             'PARP(90)=0.16  ! Multiple interactions: rescaling power', 
00025             'PARP(67)=2.5    ! amount of initial-state radiation', 
00026             'PARP(85)=1.0  ! gluon prod. mechanism in MI', 
00027             'PARP(86)=1.0  ! gluon prod. mechanism in MI', 
00028             'PARP(62)=1.25   ! ', 
00029             'PARP(64)=0.2    ! ', 
00030             'MSTP(91)=1     !', 
00031             'PARP(91)=2.1   ! kt distribution', 
00032             'PARP(93)=15.0  ! '),
00033         # This is a vector of ParameterSet names to be read, in this order
00034         parameterSets = cms.vstring('pythiaUESettings', 
00035             'processParameters'),
00036         processParameters = cms.vstring('MSEL=0                  ! User defined processes', 
00037             'MSUB(81) = 1            ! qqbar to QQbar', 
00038             'MSUB(82) = 1            ! gg to QQbar', 
00039             'MSTP(7) = 6             ! flavour = top', 
00040             'PMAS(6,1) = 175.        ! top quark mass')
00041     )
00042 )
00043 
00044 ProductionFilterSequence = cms.Sequence(generator)