DetachedTripletStep_cff.py

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import FWCore.ParameterSet.Config as cms

# import the full tracking equivalent of this file
import RecoTracker.IterativeTracking.DetachedTripletStep_cff as _detachedTripletStep

# fast tracking mask producer
import FastSimulation.Tracking.FastTrackerRecHitMaskProducer_cfi
detachedTripletStepMasks = FastSimulation.Tracking.FastTrackerRecHitMaskProducer_cfi.maskProducerFromClusterRemover(_detachedTripletStep.detachedTripletStepClusters)

# trajectory seeds
import FastSimulation.Tracking.TrajectorySeedProducer_cfi
detachedTripletStepSeeds = FastSimulation.Tracking.TrajectorySeedProducer_cfi.trajectorySeedProducer.clone(
    minLayersCrossed = 3,
    layerList = _detachedTripletStep.detachedTripletStepSeedLayers.layerList.value(),
    RegionFactoryPSet = _detachedTripletStep.detachedTripletStepSeeds.RegionFactoryPSet,
    hitMasks = cms.InputTag("detachedTripletStepMasks"),
    )

# track candidates
import FastSimulation.Tracking.TrackCandidateProducer_cfi
detachedTripletStepTrackCandidates = FastSimulation.Tracking.TrackCandidateProducer_cfi.trackCandidateProducer.clone(
    src = cms.InputTag("detachedTripletStepSeeds"),
    MinNumberOfCrossedLayers = 3,
    hitMasks = cms.InputTag("detachedTripletStepMasks"),
    )

# tracks 
detachedTripletStepTracks = _detachedTripletStep.detachedTripletStepTracks.clone(
    Fitter = 'KFFittingSmootherSecond',
    TTRHBuilder = 'WithoutRefit',
    Propagator = 'PropagatorWithMaterial'

)

#final selection
#detachedTripletStepSelector = _detachedTripletStep.detachedTripletStepSelector.clone()

#detachedTripletStepSelector.vertices = "firstStepPrimaryVerticesBeforeMixing"
#detachedTripletStep = _detachedTripletStep.detachedTripletStep.clone() 

detachedTripletStepClassifier1 = _detachedTripletStep.detachedTripletStepClassifier1.clone()
detachedTripletStepClassifier1.vertices = "firstStepPrimaryVerticesBeforeMixing"
detachedTripletStepClassifier2 = _detachedTripletStep.detachedTripletStepClassifier2.clone()
detachedTripletStepClassifier2.vertices = "firstStepPrimaryVerticesBeforeMixing"
detachedTripletStep = _detachedTripletStep.detachedTripletStep.clone()

# Final sequence 
DetachedTripletStep = cms.Sequence(detachedTripletStepMasks
                                   +detachedTripletStepSeeds
                                   +detachedTripletStepTrackCandidates
                                   +detachedTripletStepTracks
                                   +detachedTripletStepClassifier1*detachedTripletStepClassifier2
                                   +detachedTripletStep
                                   )