herwigDefaults_cff.py

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import FWCore.ParameterSet.Config as cms

herwigDefaultsBlock = cms.PSet(
    dataLocation = cms.string('${HERWIGPATH}'),

    repository = cms.string('HerwigDefaults.rpo'),
    eventHandlers = cms.string('/Herwig/EventHandlers'),
    generatorModule = cms.string('/Herwig/Generators/LHCGenerator'),

    run = cms.string('LHC'),

    cmsDefaults = cms.vstring(
        '+pdfCTEQ6LL',
        '+basicSetup',
        '+cm14TeV',
        '+setParticlesStableForDetector',
    ),

    basicSetup = cms.vstring(
        'cd /Herwig/Generators',
        'create ThePEG::RandomEngineGlue /Herwig/RandomGlue',
        'set LHCGenerator:RandomNumberGenerator /Herwig/RandomGlue',
        'set LHCGenerator:NumberOfEvents 10000000',
        'set LHCGenerator:DebugLevel 1',
        'set LHCGenerator:PrintEvent 0',
        'set LHCGenerator:MaxErrors 10000',
        'cd /Herwig/Particles',
        'set K0:Width 1e300*GeV',
        'set Kbar0:Width 1e300*GeV',
        'cd /',
    ),

    # PDF presets
    ##############################

    # Default pdf for Herwig++ 2.3
    pdfMRST2001 = cms.vstring(
        'cd /Herwig/Partons',
        'create Herwig::MRST MRST2001 HwMRST.so',
        'setup MRST2001 ${HERWIGPATH}/PDF/mrst/2001/lo2002.dat',
        'set MRST2001:RemnantHandler HadronRemnants',
        'cd /',
        'cp /Herwig/Partons/MRST2001 /cmsPDFSet',
                'cd /Herwig/Particles',
                'set p+:PDF /cmsPDFSet',
                'set pbar-:PDF /cmsPDFSet',
        '+ue_2_3',
    ),
    # Default pdf for Herwig++ 2.4
    pdfMRST2008LOss = cms.vstring(
        'cp /Herwig/Partons/MRST /cmsPDFSet',
                'cd /Herwig/Particles',
                'set p+:PDF /cmsPDFSet',
                'set pbar-:PDF /cmsPDFSet',
        '+ue_2_4',
    ),
    pdfCTEQ6LL = cms.vstring(
                'cd /Herwig/Partons',
                'create ThePEG::LHAPDF myPDFset ThePEGLHAPDF.so',
                 'set myPDFset:PDFName cteq6ll.LHpdf',
                 'set myPDFset:RemnantHandler HadronRemnants',
                 'set /Herwig/Particles/p+:PDF myPDFset',
                 'set /Herwig/Particles/pbar-:PDF myPDFset',
                 'cd /'
        ),
        pdfCT10 = cms.vstring(
                'cd /Herwig/Partons',
                'create ThePEG::LHAPDF myPDFset ThePEGLHAPDF.so',
                 'set myPDFset:PDFName CT10.LHgrid',
                 'set myPDFset:RemnantHandler HadronRemnants',
                 'set /Herwig/Particles/p+:PDF myPDFset',
                 'set /Herwig/Particles/pbar-:PDF myPDFset',
                 'cd /'
        ),

    # CME presets
    ##############################

    cm7TeV = cms.vstring(
        'set /Herwig/Generators/LHCGenerator:EventHandler:LuminosityFunction:Energy 7000.0',
        'set /Herwig/Shower/Evolver:IntrinsicPtGaussian 2.0*GeV',
    ),
    cm10TeV = cms.vstring(
        'set /Herwig/Generators/LHCGenerator:EventHandler:LuminosityFunction:Energy 10000.0',
        'set /Herwig/Shower/Evolver:IntrinsicPtGaussian 2.1*GeV',
    ),
    cm14TeV = cms.vstring(
        'set /Herwig/Generators/LHCGenerator:EventHandler:LuminosityFunction:Energy 14000.0',
        'set /Herwig/Shower/Evolver:IntrinsicPtGaussian 2.2*GeV',
    ),

    # UE tunes
    ##############################

    # UE Tune from Herwig++ 2.3 (MRST2001)
    ue_2_3 = cms.vstring(
        'cd /Herwig/UnderlyingEvent',
        'set KtCut:MinKT 4.0',
        'set UECuts:MHatMin 8.0',
        'set MPIHandler:InvRadius 1.5',
        'cd /'
    ),
    # UE Tune from Herwig++ 2.4 (MRST2008LO**)
    ue_2_4 = cms.vstring(
        'cd /Herwig/UnderlyingEvent',
        'set KtCut:MinKT 4.3',
        'set UECuts:MHatMin 8.6',
        'set MPIHandler:InvRadius 1.2',
        'cd /'
    ),

    # reweight presets
    ##############################

    reweightConstant = cms.vstring(
        'mkdir /Herwig/Weights',
        'cd /Herwig/Weights',
        'create ThePEG::ReweightConstant reweightConstant ReweightConstant.so',
        'cd /',
        'set /Herwig/Weights/reweightConstant:C 1',
        'insert SimpleQCD:Reweights[0] /Herwig/Weights/reweightConstant',
    ),
    reweightPthat = cms.vstring(
        'mkdir /Herwig/Weights',
        'cd /Herwig/Weights',
        'create ThePEG::ReweightMinPT reweightMinPT ReweightMinPT.so',
        'cd /',
        'set /Herwig/Weights/reweightMinPT:Power 4.5',
        'set /Herwig/Weights/reweightMinPT:Scale 15*GeV',
        'insert SimpleQCD:Reweights[0] /Herwig/Weights/reweightMinPT',
    ),

    # Disable decays of particles with ctau > 10mm
    setParticlesStableForDetector = cms.vstring(
        'cd /Herwig/Particles',
        'set mu-:Stable Stable',
        'set mu+:Stable Stable',
        'set Sigma-:Stable Stable',
        'set Sigmabar+:Stable Stable',
        'set Lambda0:Stable Stable',
        'set Lambdabar0:Stable Stable',
        'set Sigma+:Stable Stable',
        'set Sigmabar-:Stable Stable',
        'set Xi-:Stable Stable',
        'set Xibar+:Stable Stable',
        'set Xi0:Stable Stable',
        'set Xibar0:Stable Stable',
        'set Omega-:Stable Stable',
        'set Omegabar+:Stable Stable',
        'set pi+:Stable Stable',
        'set pi-:Stable Stable',
        'set K+:Stable Stable',
        'set K-:Stable Stable',
        'set K_S0:Stable Stable',
        'set K_L0:Stable Stable',
        'cd /',
    ),

    # Default settings for using LHE files
    lheDefaults = cms.vstring(
        'cd /Herwig/Cuts',
        'create ThePEG::Cuts NoCuts',
        'cd /Herwig/EventHandlers',
        'create ThePEG::LesHouchesInterface LHEReader',
        'set LHEReader:Cuts /Herwig/Cuts/NoCuts',
        'create ThePEG::LesHouchesEventHandler LHEHandler',
        'set LHEHandler:WeightOption VarWeight',
        'set LHEHandler:PartonExtractor /Herwig/Partons/QCDExtractor',
        'set LHEHandler:CascadeHandler /Herwig/Shower/ShowerHandler',
        'set LHEHandler:HadronizationHandler /Herwig/Hadronization/ClusterHadHandler',
        'set LHEHandler:DecayHandler /Herwig/Decays/DecayHandler',
        'insert LHEHandler:LesHouchesReaders 0 LHEReader',
        'cd /Herwig/Generators',
        'set LHCGenerator:EventHandler /Herwig/EventHandlers/LHEHandler',
        'cd /Herwig/Shower',
        'set Evolver:HardVetoScaleSource Read',
        'set Evolver:MECorrMode No',
        'cd /',
    ),
    lheDefaultPDFs = cms.vstring(
        'cd /Herwig/EventHandlers',
        'set LHEReader:PDFA /cmsPDFSet',
        'set LHEReader:PDFB /cmsPDFSet',
        'cd /',
    ),

    # Default settings for using POWHEG
    powhegDefaults = cms.vstring(
        '# Need to use an NLO PDF',
        'set /Herwig/Particles/p+:PDF    /Herwig/Partons/MRST-NLO',
        'set /Herwig/Particles/pbar-:PDF /Herwig/Partons/MRST-NLO',
        '# and strong coupling',
        'create Herwig::O2AlphaS O2AlphaS',
        'set /Herwig/Generators/LHCGenerator:StandardModelParameters:QCD/RunningAlphaS O2AlphaS',
        '# Setup the POWHEG shower',
        'cd /Herwig/Shower',
        '# use the general recon for now',
        'set KinematicsReconstructor:ReconstructionOption General',
        '# create the Powheg evolver and use it instead of the default one',
        'create Herwig::PowhegEvolver PowhegEvolver HwPowhegShower.so',
        'set ShowerHandler:Evolver PowhegEvolver',
        'set PowhegEvolver:ShowerModel ShowerModel',
        'set PowhegEvolver:SplittingGenerator SplittingGenerator',
        'set PowhegEvolver:MECorrMode 0',
        '# create and use the Drell-yan hard emission generator',
        'create Herwig::DrellYanHardGenerator DrellYanHardGenerator',
        'set DrellYanHardGenerator:ShowerAlpha AlphaQCD',
        'insert PowhegEvolver:HardGenerator 0 DrellYanHardGenerator',
        '# create and use the gg->H hard emission generator',
        'create Herwig::GGtoHHardGenerator GGtoHHardGenerator',
        'set GGtoHHardGenerator:ShowerAlpha AlphaQCD',
        'insert PowhegEvolver:HardGenerator 0 GGtoHHardGenerator',
    )
)