Phase1PU70_PixelPairStep_cff.py

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import FWCore.ParameterSet.Config as cms


# NEW CLUSTERS (remove previously used clusters)
from RecoLocalTracker.SubCollectionProducers.trackClusterRemover_cfi import *
pixelPairStepClusters = trackClusterRemover.clone(
    maxChi2                                  = cms.double(9.0),
    trajectories                             = cms.InputTag("mixedTripletStepTracks"),
    pixelClusters                            = cms.InputTag("siPixelClusters"),
    stripClusters                            = cms.InputTag("siStripClusters"),
    oldClusterRemovalInfo                    = cms.InputTag("mixedTripletStepClusters"),
    overrideTrkQuals                         = cms.InputTag('mixedTripletStep'),
    TrackQuality                             = cms.string('highPurity'),
    minNumberOfLayersWithMeasBeforeFiltering = cms.int32(0),
)

# SEEDING LAYERS
pixelPairStepSeedLayers = cms.EDProducer("SeedingLayersEDProducer",
    layerList = cms.vstring('BPix1+BPix2', 'BPix1+BPix3', 'BPix2+BPix3',
                            'BPix2+BPix4', 'BPix3+BPix4',
                            'BPix1+FPix1_pos', 'BPix1+FPix1_neg',
                            'BPix2+FPix1_pos', 'BPix2+FPix1_neg', 
                            'FPix1_pos+FPix2_pos', 'FPix1_neg+FPix2_neg',
                            'FPix2_pos+FPix3_pos', 'FPix2_neg+FPix3_neg'),
    BPix = cms.PSet(
        TTRHBuilder = cms.string('WithTrackAngle'),
        HitProducer = cms.string('siPixelRecHits'),
        skipClusters = cms.InputTag('pixelPairStepClusters')
    ),
    FPix = cms.PSet(
        TTRHBuilder = cms.string('WithTrackAngle'),
        HitProducer = cms.string('siPixelRecHits'),
        skipClusters = cms.InputTag('pixelPairStepClusters')
    )
)

# SEEDS
import RecoTracker.TkSeedGenerator.GlobalSeedsFromPairsWithVertices_cff
pixelPairStepSeeds = RecoTracker.TkSeedGenerator.GlobalSeedsFromPairsWithVertices_cff.globalSeedsFromPairsWithVertices.clone()
pixelPairStepSeeds.RegionFactoryPSet.RegionPSet.ptMin = 1.2
pixelPairStepSeeds.RegionFactoryPSet.RegionPSet.originRadius = 0.015
pixelPairStepSeeds.RegionFactoryPSet.RegionPSet.fixedError = 0.03
pixelPairStepSeeds.OrderedHitsFactoryPSet.SeedingLayers = cms.InputTag('pixelPairStepSeedLayers')

pixelPairStepSeeds.SeedComparitorPSet = cms.PSet(
        ComponentName = cms.string('PixelClusterShapeSeedComparitor'),
        FilterAtHelixStage = cms.bool(True),
        FilterPixelHits = cms.bool(True),
        FilterStripHits = cms.bool(False),
        ClusterShapeHitFilterName = cms.string('ClusterShapeHitFilter'),
        ClusterShapeCacheSrc = cms.InputTag('siPixelClusterShapeCache')
    )
pixelPairStepSeeds.ClusterCheckPSet.doClusterCheck = cms.bool(False)
pixelPairStepSeeds.OrderedHitsFactoryPSet.maxElement =  cms.uint32(0)
pixelPairStepSeeds.SeedCreatorPSet.magneticField = ''
pixelPairStepSeeds.SeedCreatorPSet.propagator = 'PropagatorWithMaterial'

# QUALITY CUTS DURING TRACK BUILDING
import TrackingTools.TrajectoryFiltering.TrajectoryFilter_cff
pixelPairStepTrajectoryFilter = TrackingTools.TrajectoryFiltering.TrajectoryFilter_cff.CkfBaseTrajectoryFilter_block.clone(
    maxLostHitsFraction = cms.double(1./10.),
    constantValueForLostHitsFractionFilter = cms.double(0.801),
    minimumNumberOfHits = 3,
    minPt = 0.1
    )

import TrackingTools.KalmanUpdators.Chi2MeasurementEstimator_cfi
pixelPairStepChi2Est = TrackingTools.KalmanUpdators.Chi2MeasurementEstimator_cfi.Chi2MeasurementEstimator.clone(
    ComponentName = cms.string('pixelPairStepChi2Est'),
    nSigma = cms.double(3.0),
    MaxChi2 = cms.double(16.0)
)

# TRACK BUILDING
import RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi
pixelPairStepTrajectoryBuilder = RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi.GroupedCkfTrajectoryBuilder.clone(
    MeasurementTrackerName = '',
    trajectoryFilter = cms.PSet(refToPSet_ = cms.string('pixelPairStepTrajectoryFilter')),
    maxCand = 3,
    estimator = cms.string('pixelPairStepChi2Est'),
    maxDPhiForLooperReconstruction = cms.double(2.0),
    maxPtForLooperReconstruction = cms.double(0.7) 
    )

# MAKING OF TRACK CANDIDATES
import RecoTracker.CkfPattern.CkfTrackCandidates_cfi
pixelPairStepTrackCandidates = RecoTracker.CkfPattern.CkfTrackCandidates_cfi.ckfTrackCandidates.clone(
    src = cms.InputTag('pixelPairStepSeeds'),
    clustersToSkip = cms.InputTag('pixelPairStepClusters'),
    TrajectoryBuilderPSet = cms.PSet(refToPSet_ = cms.string('pixelPairStepTrajectoryBuilder')),
    ### these two parameters are relevant only for the CachingSeedCleanerBySharedInput
    numHitsForSeedCleaner = cms.int32(50),
    onlyPixelHitsForSeedCleaner = cms.bool(True)
)

from TrackingTools.TrajectoryCleaning.TrajectoryCleanerBySharedHits_cfi import trajectoryCleanerBySharedHits
pixelPairStepTrajectoryCleanerBySharedHits = trajectoryCleanerBySharedHits.clone(
        ComponentName = cms.string('pixelPairStepTrajectoryCleanerBySharedHits'),
            fractionShared = cms.double(0.095),
            allowSharedFirstHit = cms.bool(True)
            )
pixelPairStepTrackCandidates.TrajectoryCleaner = 'pixelPairStepTrajectoryCleanerBySharedHits'

# TRACK FITTING
import RecoTracker.TrackProducer.TrackProducer_cfi
pixelPairStepTracks = RecoTracker.TrackProducer.TrackProducer_cfi.TrackProducer.clone(
    AlgorithmName = cms.string('pixelPairStep'),
    src = 'pixelPairStepTrackCandidates',
    Fitter = cms.string('FlexibleKFFittingSmoother'),
    TTRHBuilder=cms.string('WithTrackAngle')
    )

# Final selection
import RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi
pixelPairStepSelector = RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.multiTrackSelector.clone(
    src='pixelPairStepTracks',
    trackSelectors= cms.VPSet(
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.looseMTS.clone(
            name = 'pixelPairStepLoose',
            chi2n_par = 0.9,
            res_par = ( 0.003, 0.002 ),
            minNumberLayers = 3,
            maxNumberLostLayers = 3,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.4, 4.0 ),
            dz_par1 = ( 0.4, 4.0 ),
            d0_par2 = ( 0.4, 4.0 ),
            dz_par2 = ( 0.4, 4.0 )
            ), #end of pset
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.tightMTS.clone(
            name = 'pixelPairStepTight',
            preFilterName = 'pixelPairStepLoose',
            chi2n_par = 0.6,
            res_par = ( 0.003, 0.002 ),
            minNumberLayers = 4,
            maxNumberLostLayers = 2,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.3, 4.0 ),
            dz_par1 = ( 0.3, 4.0 ),
            d0_par2 = ( 0.3, 4.0 ),
            dz_par2 = ( 0.3, 4.0 )
            ),
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.highpurityMTS.clone(
            name = 'pixelPairStep',
            preFilterName = 'pixelPairStepTight',
            chi2n_par = 0.4,
            res_par = ( 0.003, 0.001 ),
            minNumberLayers = 4,
            maxNumberLostLayers = 1,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.2, 4.0 ),
            dz_par1 = ( 0.25, 4.0 ),
            d0_par2 = ( 0.25, 4.0 ),
            dz_par2 = ( 0.25, 4.0 )
            ),
        ) #end of vpset
    ) #end of clone

# Final sequence
PixelPairStep = cms.Sequence(pixelPairStepClusters*
                         pixelPairStepSeedLayers*
                         pixelPairStepSeeds*
                         pixelPairStepTrackCandidates*
                         pixelPairStepTracks*
                         pixelPairStepSelector)