TTbar_cfi.py

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import FWCore.ParameterSet.Config as cms

from Configuration.Generator.PythiaUESettings_cfi import *
generator = cms.EDFilter("Pythia6GeneratorFilter",
    pythiaHepMCVerbosity = cms.untracked.bool(False),
    maxEventsToPrint = cms.untracked.int32(0),
    pythiaPylistVerbosity = cms.untracked.int32(0),
    filterEfficiency = cms.untracked.double(1.0),
    comEnergy = cms.double(10000.0),
    PythiaParameters = cms.PSet(
        pythiaUESettingsBlock,
        processParameters = cms.vstring('MSEL      = 0     ! User defined processes', 
            'MSUB(81)  = 1     ! qqbar to QQbar', 
            'MSUB(82)  = 1     ! gg to QQbar', 
            'MSTP(7)   = 6     ! flavour = top', 
            'PMAS(6,1) = 175.  ! top quark mass'),
        # This is a vector of ParameterSet names to be read, in this order
        parameterSets = cms.vstring('pythiaUESettings', 
            'processParameters')
    )
)