Herwig7_QED_EvtGen_Common.py

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# JobOption fragment for Herwig >=7.0.4
 
# Common job option for gamma gamma processes in Herwig7
# Contact: Oldrich Kepka
 
assert hasattr(genSeq, "Herwig7")
 
Herwig7Config.add_commands(Herwig7Config.pdf_gammagamma_cmds())
 
 
cmds = """
set /Herwig/Partons/QCDExtractor:FirstPDF /Herwig/Partons/BudnevPDF
set /Herwig/Partons/QCDExtractor:SecondPDF /Herwig/Partons/BudnevPDF
set /Herwig/Partons/BudnevPDF:Q2Max 4.
 
create ThePEG::O1AlphaS /Herwig/AlphaQCD_O1 O1AlphaS.so
set /Herwig/Generators/LHCGenerator:StandardModelParameters:QCD/RunningAlphaS /Herwig/AlphaQCD_O1
 
# Cuts
cd /Herwig/Cuts
set QCDCuts:ScaleMin 0.0*MeV
set QCDCuts:X1Min 0
set QCDCuts:X2Min 0
set QCDCuts:X1Max 1.
set QCDCuts:X2Max 1.
erase QCDCuts:MultiCuts 0
"""
Herwig7Config.add_commands(cmds)
del cmds
 
# To avoid warning from displaced vertices, bugfix needed in herwig++
testSeq.TestHepMC.MaxTransVtxDisp = 1000000
testSeq.TestHepMC.MaxVtxDisp      = 1000000000