GenPlusSimParticles_cfi.py

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# These customize functions can be used to produce or keep a GenPlusSimParticleProducer collection,
# which contains particles from the generator (e.g. Pythia) and simulation (i.e., GEANT).  
#
# Add to the cmsDriver.py command an argument such as:  
# --customise SimG4Core/CustomPhysics/GenPlusSimParticles_cfi.customizeProduce,SimG4Core/CustomPhysics/GenPlusSimParticles_cfi.customizeKeep

import FWCore.ParameterSet.Config as cms

def customizeKeep (process):
  outputTypes = ["RAWSIM", "RECOSIM", "AODSIM", "MINIAODSIM"]
  for a in outputTypes:
    b = a + "output"
    if hasattr (process, b):
      getattr (process, b).outputCommands.append ("keep *_genParticlePlusGeant_*_*")

  return process


def customizeProduce (process):
    process.genParticlePlusGeant = cms.EDProducer("GenPlusSimParticleProducer",
                                                  src = cms.InputTag("g4SimHits"),            # use "fastSimProducer" for FastSim
                                                  setStatus = cms.int32(8),                   # set status = 8 for GEANT GPs 
                                                  filter = cms.vstring("pt > 10.0"),          # just for testing (optional) 
                                                  genParticles = cms.InputTag("genParticles") # original genParticle list 
                                                  )  

    if hasattr (process, "simulation_step") and hasattr(process, "psim"):
      getattr(process, "simulation_step")._seq = getattr(process,"simulation_step")._seq * process.genParticlePlusGeant   

    return process