/data/refman/pasoursint/CMSSW_5_3_1/src/Configuration/StandardSequences/python/Generator_cff.py

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import FWCore.ParameterSet.Config as cms

#
# generator level info
#
from PhysicsTools.HepMCCandAlgos.genParticles_cfi import *
from RecoJets.Configuration.RecoGenJets_cff import *
from RecoMET.Configuration.RecoGenMET_cff import *
from RecoJets.Configuration.GenJetParticles_cff import *
from RecoMET.Configuration.GenMETParticles_cff import *
# Vertex smearing
#
# There're several types of Vertex smearing module (Gauss, Flat, BeamProfile, Betafunc, BetafuncEarlyCollisions);
# the cff's are available for each one :
# Configuration/StandardSequences/data/VtxSmearedGauss.cff
# Configuration/StandardSequences/data/VtxSmearedFlat.cff
# Configuration/StandardSequences/data/VtxSmearedBeamProfile.cff
# Configuration/StandardSequences/data/VtxSmearedBetafuncNominalCollision.cff
# Configuration/StandardSequences/data/VtxSmearedBetafuncEarlyCollision.cff
#
# Either of the above returns label "VtxSmeared" that is already in the path below
# (but not included here!!!)
#   
# Note 1 : one and only label is allowed for either of these modules,
#          that is VtxSmeared (the reason is not to allow multiple smearing); 
#          an attempt to use any other label will cause the Fwk to throw
# Note 2 : because only one label is allowed, a user can have only one
#          instance of the Vertex smearing module in a given Configuration;
#          in other words, if you put in 2 or all 3 of the available cfi's, 
#          the Fwk will throw
#
# Currently, we suggest using Betafunc vertex smearing in the desired LHC Configuration 
#
# The vertex smearing needs to be called before the particle candidate generation
#
# REMINDER : vertex smearing need a startup seed;
# in your cfg, do NOT forget to give seeds via RandomNumberGeneratorService !!!
# 
# Example Configuration of the RandomNumberGeneratorService to appear in cfg:
# service = RandomNumberGeneratorService
# {
#   untracked uint32 sourceSeed = 123456789
#   PSet moduleSeeds =
#   {
#      untracked uint32 VtxSmeared = 98765432
#   }
# }
VertexSmearing = cms.Sequence(cms.SequencePlaceholder("VtxSmeared"))
GeneInfo = cms.Sequence(genParticles)
genJetMET = cms.Sequence(genJetParticles*recoGenJets+genMETParticles*recoGenMET)
pgen = cms.Sequence(cms.SequencePlaceholder("randomEngineStateProducer")+VertexSmearing+GeneInfo+genJetMET)

# sequence for bare generator result only, without vertex smearing and analysis objects added

pgen_genonly = cms.Sequence(cms.SequencePlaceholder("randomEngineStateProducer"))

#
# this sequence is intended for HI runs/studies;
#

hiGenJets = cms.Sequence(hiGenParticlesForJets*hiRecoGenJets)

from PhysicsTools.HepMCCandAlgos.HiGenParticles_cfi import *

pgen_hi = cms.Sequence(cms.SequencePlaceholder("randomEngineStateProducer")+VertexSmearing+hiGenParticles+hiGenJets)

from SimGeneral.MixingModule.MatchVtx_cfi import *

pgen_himix = cms.Sequence(cms.SequencePlaceholder("randomEngineStateProducer")+matchVtx+hiGenParticles+hiGenJets)

fixGenInfo = cms.Sequence(GeneInfo * genJetMET)