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import FWCore.ParameterSet.Config as cms
from Configuration.Generator.PythiaUESettings_cfi import *
#
# Example illustrating how to change particle properties/branching ratios
# with PYUPDA cards.
#
# This produces an H0, which decays to a pair of long-lived exotic particles
# which then each decay to a pair of light quarks.
#
generator = cms.EDFilter("Pythia6GeneratorFilter",
pythiaHepMCVerbosity = cms.untracked.bool(True),
maxEventsToPrint = cms.untracked.int32(10),
# Print event
pythiaPylistVerbosity = cms.untracked.int32(3),
# Print decay tables
# pythiaPylistVerbosity = cms.untracked.int32(12),
filterEfficiency = cms.untracked.double(1.0),
comEnergy = cms.double(10000.0),
# crossSection = cms.untracked.double(55000000000.),
UseExternalGenerators = cms.untracked.bool(False),
#
PythiaParameters = cms.PSet(
pythiaUESettingsBlock,
pythiaMyParameters = cms.vstring(
# This is needed if you are introducing long-lived exotic particles.
'MSTJ(22)=1 ! Decay ALL unstable particles',
'MSEL=0',
# Request gg -> H0 production
'MSUB(152)=1',
'MWID(35)=2 ! Let me set H0 properties'
),
#
# This block controls how Pythia interacts with the PYUPDA cards.
#
PYUPDAParameters = cms.vstring(
# Either:
# 1) Specify the location of the PYUPDA table to be read in.
"PYUPDAFILE = 'Configuration/Generator/data/Pythia_H0_pyupda.in'"
# Optionally ask to call PYUPDA after PYINIT. Don't do this unless you have to.
# "PYUPDApostPYINIT"
# Or:
# 2) Write current PYUPDA parameters to file (so you can edit them and read back in).
# "PYUPDAFILE = \'pyupda.out\'"
# "PYUPDAWRITE"
),
#
# This is a vector of ParameterSet names to be read, in this order
parameterSets = cms.vstring('pythiaUESettings',
'pythiaMyParameters',
'PYUPDAParameters')
)
)
# N.B. If your PYUPDA tables introduces new exotic particles, you will need
# to include:
#
# genParticles.abortOnUnknownPDGCode = cms.untracked.bool(False)
# This is no longer necessary, as starting 34X cmsDriver takes care automatically
#
#ProductionFilterSequence = cms.Sequence(generator)
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