00001 import FWCore.ParameterSet.Config as cms
00002
00003 source = cms.Source("PythiaSource",
00004 pythiaHepMCVerbosity = cms.untracked.bool(False),
00005 maxEventsToPrint = cms.untracked.int32(0),
00006 pythiaPylistVerbosity = cms.untracked.int32(0),
00007 PythiaParameters = cms.PSet(
00008 pythiaUESettings = cms.vstring('MSTJ(11)=3 ! Choice of the fragmentation function',
00009 'MSTJ(22)=2 ! Decay those unstable particles',
00010 'PARJ(71)=10 . ! for which ctau 10 mm',
00011 'MSTP(2)=1 ! which order running alphaS',
00012 'MSTP(33)=0 ! no K factors in hard cross sections',
00013 'MSTP(51)=7 ! structure function chosen',
00014 'MSTP(81)=1 ! multiple parton interactions 1 is Pythia default',
00015 'MSTP(82)=4 ! Defines the multi-parton model',
00016 'MSTU(21)=1 ! Check on possible errors during program execution',
00017 'PARP(82)=1.9409 ! pt cutoff for multiparton interactions',
00018 'PARP(89)=1960. ! sqrts for which PARP82 is set',
00019 'PARP(83)=0.5 ! Multiple interactions: matter distrbn parameter',
00020 'PARP(84)=0.4 ! Multiple interactions: matter distribution parameter',
00021 'PARP(90)=0.16 ! Multiple interactions: rescaling power',
00022 'PARP(67)=2.5 ! amount of initial-state radiation',
00023 'PARP(85)=1.0 ! gluon prod. mechanism in MI',
00024 'PARP(86)=1.0 ! gluon prod. mechanism in MI',
00025 'PARP(62)=1.25 ! ',
00026 'PARP(64)=0.2 ! ',
00027 'MSTP(91)=1 !',
00028 'PARP(91)=2.1 ! kt distribution',
00029 'PARP(93)=15.0 ! '),
00030
00031 parameterSets = cms.vstring('pythiaUESettings',
00032 'processParameters'),
00033 processParameters = cms.vstring('MSEL=0 ! User defined processes',
00034 'MSUB(81) = 1 ! qqbar to QQbar',
00035 'MSUB(82) = 1 ! gg to QQbar',
00036 'MSTP(7) = 6 ! flavour = top',
00037 'PMAS(6,1) = 175. ! top quark mass')
00038 )
00039 )
00040
00041
1.5.4