conversionTrackSequence_cff.py

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import FWCore.ParameterSet.Config as cms

import RecoEgamma.EgammaPhotonProducers.conversionTrackProducer_cfi
import RecoEgamma.EgammaPhotonProducers.conversionTrackMerger_cfi

# Conversion Track candidate producer 
from RecoEgamma.EgammaPhotonProducers.conversionTrackCandidates_cfi import *
# Conversion Track producer  ( final fit )
from RecoEgamma.EgammaPhotonProducers.ckfOutInTracksFromConversions_cfi import *
from RecoEgamma.EgammaPhotonProducers.ckfInOutTracksFromConversions_cfi import *
ckfTracksFromConversions = cms.Sequence(conversionTrackCandidates*ckfOutInTracksFromConversions*ckfInOutTracksFromConversions)



#producer from general tracks collection, set tracker only, merged arbitrated, merged arbitrated ecal/general flags
generalConversionTrackProducer = RecoEgamma.EgammaPhotonProducers.conversionTrackProducer_cfi.conversionTrackProducer.clone(
    TrackProducer = cms.string('generalTracks'),
    setTrackerOnly = cms.bool(True),
    setArbitratedMergedEcalGeneral = cms.bool(True),
)

#producer from inout ecal seeded tracks, set arbitratedecalseeded, mergedarbitratedecalgeneral and mergedarbitrated flags
inOutConversionTrackProducer = RecoEgamma.EgammaPhotonProducers.conversionTrackProducer_cfi.conversionTrackProducer.clone(
    TrackProducer = cms.string('ckfInOutTracksFromConversions'),
    setArbitratedEcalSeeded = cms.bool(True),
    setArbitratedMergedEcalGeneral = cms.bool(True),    
)

#producer from outin ecal seeded tracks, set arbitratedecalseeded, mergedarbitratedecalgeneral and mergedarbitrated flags
outInConversionTrackProducer = RecoEgamma.EgammaPhotonProducers.conversionTrackProducer_cfi.conversionTrackProducer.clone(
    TrackProducer = cms.string('ckfOutInTracksFromConversions'),
    setArbitratedEcalSeeded = cms.bool(True),
    setArbitratedMergedEcalGeneral = cms.bool(True),    
)

#producer from gsf tracks, set only mergedarbitrated flag (default behaviour)
gsfConversionTrackProducer = RecoEgamma.EgammaPhotonProducers.conversionTrackProducer_cfi.conversionTrackProducer.clone(
    TrackProducer = cms.string('electronGsfTracks'),
)

conversionTrackProducers = cms.Sequence(generalConversionTrackProducer*inOutConversionTrackProducer*outInConversionTrackProducer*gsfConversionTrackProducer)

#merge two ecal-seeded collections, with arbitration by nhits then chi^2/ndof for ecalseededarbitrated, mergedarbitratedecalgeneral and mergedarbitrated flags
inOutOutInConversionTrackMerger = RecoEgamma.EgammaPhotonProducers.conversionTrackMerger_cfi.conversionTrackMerger.clone(
    TrackProducer1 = cms.string('inOutConversionTrackProducer'),
    TrackProducer2 = cms.string('outInConversionTrackProducer'),
    #prefer collection settings:
    #-1: propagate output/flag from both input collections
    # 0: propagate output/flag from neither input collection
    # 1: arbitrate output/flag (remove duplicates by shared hits), give precedence to first input collection
    # 2: arbitrate output/flag (remove duplicates by shared hits), give precedence to second input collection
    # 3: arbitrate output/flag (remove duplicates by shared hits), arbitration first by number of hits, second by chisq/ndof  
    arbitratedEcalSeededPreferCollection = cms.int32(3),    
    arbitratedMergedPreferCollection = cms.int32(3),
    arbitratedMergedEcalGeneralPreferCollection = cms.int32(3),        
)

#merge ecalseeded collections with collection from general tracks
#trackeronly flag is forwarded from the generaltrack-based collections
#ecalseeded flag is forwarded from the ecal seeded collection
#arbitratedmerged flag is set based on shared hit matching, arbitration by nhits then chi^2/ndof
#arbitratedmergedecalgeneral flag is set based on shared hit matching, precedence given to generalTracks
generalInOutOutInConversionTrackMerger = RecoEgamma.EgammaPhotonProducers.conversionTrackMerger_cfi.conversionTrackMerger.clone(
    TrackProducer1 = cms.string('inOutOutInConversionTrackMerger'),
    TrackProducer2 = cms.string('generalConversionTrackProducer'),
    arbitratedMergedPreferCollection = cms.int32(3),
    arbitratedMergedEcalGeneralPreferCollection = cms.int32(2),        
)

#merge the result of the above with the collection from gsf tracks
#trackeronly, arbitratedmergedecalgeneral, and mergedecal flags are forwarded
#arbitratedmerged flag set based on overlap removal by shared hits, with precedence given to gsf tracks
gsfGeneralInOutOutInConversionTrackMerger = RecoEgamma.EgammaPhotonProducers.conversionTrackMerger_cfi.conversionTrackMerger.clone(
    TrackProducer1 = cms.string('generalInOutOutInConversionTrackMerger'),
    TrackProducer2 = cms.string('gsfConversionTrackProducer'),
    arbitratedMergedPreferCollection = cms.int32(2),
)

#final output collection contains combination of generaltracks, ecal seeded tracks and gsf tracks, with overlaps removed by shared hits
#precedence is given first to gsf tracks, then to the combination of ecal seeded and general tracks
#overlaps between the ecal seeded track collections and between ecal seeded and general tracks are arbitrated first by nhits then by chi^2/dof
#(logic and much of the code is adapted from FinalTrackSelectors)

conversionTrackMergers = cms.Sequence(inOutOutInConversionTrackMerger*generalInOutOutInConversionTrackMerger*gsfGeneralInOutOutInConversionTrackMerger)

conversionTrackSequence = cms.Sequence(ckfTracksFromConversions*conversionTrackProducers*conversionTrackMergers)

#merge the general tracks with the collection from gsf tracks
#arbitratedmerged flag set based on overlap removal by shared hits, with precedence given to gsf tracks
gsfGeneralConversionTrackMerger = RecoEgamma.EgammaPhotonProducers.conversionTrackMerger_cfi.conversionTrackMerger.clone(
    TrackProducer1 = cms.string('generalConversionTrackProducer'),
    TrackProducer2 = cms.string('gsfConversionTrackProducer'),
    arbitratedMergedPreferCollection = cms.int32(2),
)

conversionTrackSequenceNoEcalSeeded = cms.Sequence(generalConversionTrackProducer*gsfConversionTrackProducer*gsfGeneralConversionTrackMerger)