InitialStep_cff.py

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import FWCore.ParameterSet.Config as cms

### STEP 0 ###

# hit building
from RecoLocalTracker.SiPixelRecHits.PixelCPEESProducers_cff import *
from RecoTracker.TransientTrackingRecHit.TTRHBuilders_cff import *

# SEEDING LAYERS
import RecoTracker.TkSeedingLayers.PixelLayerTriplets_cfi
initialStepSeedLayers = RecoTracker.TkSeedingLayers.PixelLayerTriplets_cfi.PixelLayerTriplets.clone()


# seeding
from RecoTracker.TkSeedGenerator.GlobalSeedsFromTriplets_cff import *
from RecoTracker.TkTrackingRegions.GlobalTrackingRegionFromBeamSpot_cfi import RegionPsetFomBeamSpotBlock
initialStepSeeds = RecoTracker.TkSeedGenerator.GlobalSeedsFromTriplets_cff.globalSeedsFromTriplets.clone(
    RegionFactoryPSet = RegionPsetFomBeamSpotBlock.clone(
    ComponentName = cms.string('GlobalRegionProducerFromBeamSpot'),
    RegionPSet = RegionPsetFomBeamSpotBlock.RegionPSet.clone(
    ptMin = 0.6,
    originRadius = 0.02,
    nSigmaZ = 4.0
    )
    )
    )
initialStepSeeds.OrderedHitsFactoryPSet.SeedingLayers = 'initialStepSeedLayers'

from RecoPixelVertexing.PixelLowPtUtilities.ClusterShapeHitFilterESProducer_cfi import *
import RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi
initialStepSeeds.OrderedHitsFactoryPSet.GeneratorPSet.SeedComparitorPSet = RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi.LowPtClusterShapeSeedComparitor

# building
import TrackingTools.TrajectoryFiltering.TrajectoryFilter_cff
initialStepTrajectoryFilter = TrackingTools.TrajectoryFiltering.TrajectoryFilter_cff.CkfBaseTrajectoryFilter_block.clone(
    minimumNumberOfHits = 3,
    minPt = 0.2
    )

import TrackingTools.KalmanUpdators.Chi2ChargeMeasurementEstimatorESProducer_cfi
initialStepChi2Est = TrackingTools.KalmanUpdators.Chi2ChargeMeasurementEstimatorESProducer_cfi.Chi2ChargeMeasurementEstimator.clone(
    ComponentName = cms.string('initialStepChi2Est'),
    nSigma = cms.double(3.0),
    MaxChi2 = cms.double(30.0),
    minGoodStripCharge = cms.double(1724),
    pTChargeCutThreshold = cms.double(15.)
)

import RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi
initialStepTrajectoryBuilder = RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi.GroupedCkfTrajectoryBuilder.clone(
    trajectoryFilter = cms.PSet(refToPSet_ = cms.string('initialStepTrajectoryFilter')),
    alwaysUseInvalidHits = True,
    maxCand = 3,
    estimator = cms.string('initialStepChi2Est'),
    maxDPhiForLooperReconstruction = cms.double(2.0),
    maxPtForLooperReconstruction = cms.double(0.7)
    )

import RecoTracker.CkfPattern.CkfTrackCandidates_cfi
initialStepTrackCandidates = RecoTracker.CkfPattern.CkfTrackCandidates_cfi.ckfTrackCandidates.clone(
    src = cms.InputTag('initialStepSeeds'),
    ### these two parameters are relevant only for the CachingSeedCleanerBySharedInput
    numHitsForSeedCleaner = cms.int32(50),
    onlyPixelHitsForSeedCleaner = cms.bool(True),
    TrajectoryBuilderPSet = cms.PSet(refToPSet_ = cms.string('initialStepTrajectoryBuilder')),
    doSeedingRegionRebuilding = True,
    useHitsSplitting = True
    )

# fitting
import RecoTracker.TrackProducer.TrackProducer_cfi
initialStepTracks = RecoTracker.TrackProducer.TrackProducer_cfi.TrackProducer.clone(
    src = 'initialStepTrackCandidates',
    AlgorithmName = cms.string('iter0'),
    Fitter = cms.string('FlexibleKFFittingSmoother')
    )

# Final selection
import RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi
from RecoTracker.IterativeTracking.DetachedTripletStep_cff import detachedTripletStepSelector
initialStepSelector = RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.multiTrackSelector.clone(
    src='initialStepTracks',
    useAnyMVA = cms.bool(True),
    GBRForestLabel = cms.string('MVASelectorIter0_13TeV_v0'),
    trackSelectors= cms.VPSet(
    RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.looseMTS.clone(
        name = 'initialStepLoose',
        ), #end of pset
    RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.tightMTS.clone(
        name = 'initialStepTight',
        preFilterName = 'initialStepLoose',
        ),
    RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.highpurityMTS.clone(
        name = 'initialStepV1',
        preFilterName = 'initialStepTight',
        ),
    detachedTripletStepSelector.trackSelectors[4].clone(
        name = 'initialStepV2',
        preFilterName=cms.string(''),
        keepAllTracks = cms.bool(False)
        ),
    detachedTripletStepSelector.trackSelectors[5].clone(
        name = 'initialStepV3',
        preFilterName=cms.string(''),
        keepAllTracks = cms.bool(False)
        )
    ) #end of vpset
)#end of clone
import RecoTracker.FinalTrackSelectors.trackListMerger_cfi
initialStep = RecoTracker.FinalTrackSelectors.trackListMerger_cfi.trackListMerger.clone(
    TrackProducers = cms.VInputTag(cms.InputTag('initialStepTracks'),
                                   cms.InputTag('initialStepTracks'),
                                   cms.InputTag('initialStepTracks')),
    hasSelector=cms.vint32(1,1,1),
    shareFrac = cms.double(0.99),
    indivShareFrac=cms.vdouble(1.0,1.0,1.0),
    selectedTrackQuals = cms.VInputTag(cms.InputTag("initialStepSelector","initialStepV1"),
                                       cms.InputTag("initialStepSelector","initialStepV2"),
                                       cms.InputTag("initialStepSelector","initialStepV3")),
    setsToMerge = cms.VPSet(cms.PSet( tLists=cms.vint32(0,1,2), pQual=cms.bool(True) )),
    writeOnlyTrkQuals=cms.bool(True)
    )

# Final sequence
InitialStep = cms.Sequence(initialStepSeedLayers*
                           initialStepSeeds*
                           initialStepTrackCandidates*
                           initialStepTracks*
                           initialStepSelector*
                           initialStep)