RunI_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
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
    )
    )
    )
from RecoPixelVertexing.PixelLowPtUtilities.ClusterShapeHitFilterESProducer_cfi import *
import RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi
initialStepSeeds.OrderedHitsFactoryPSet.GeneratorPSet.SeedComparitorPSet = RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi.LowPtClusterShapeSeedComparitor
initialStepSeeds.OrderedHitsFactoryPSet.GeneratorPSet.maxElement = 100000

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

import TrackingTools.KalmanUpdators.Chi2MeasurementEstimatorESProducer_cfi
initialStepChi2Est = TrackingTools.KalmanUpdators.Chi2MeasurementEstimatorESProducer_cfi.Chi2MeasurementEstimator.clone(
    ComponentName = cms.string('initialStepChi2Est'),
    nSigma = cms.double(3.0),
    MaxChi2 = cms.double(30.0),
    clusterChargeCut = cms.PSet(refToPSet_ = cms.string('SiStripClusterChargeCutNone')),
)

import RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi
initialStepTrajectoryBuilder = RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi.GroupedCkfTrajectoryBuilder.clone(
    trajectoryFilter = cms.PSet(refToPSet_ = cms.string('initialStepTrajectoryFilter')),
    alwaysUseInvalidHits = True,
    maxCand = 5,
    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('initialStep'),
    Fitter = cms.string('FlexibleKFFittingSmoother')
    )

# Final selection
import RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi
initialStepSelector = RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.multiTrackSelector.clone(
    src='initialStepTracks',
    useAnyMVA = cms.bool(False),
    GBRForestLabel = cms.string('MVASelectorIter0'),
    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 = 'QualityMasks',
            preFilterName = 'initialStepTight',
            ),
        ), #end of vpset
    vertices = cms.InputTag("pixelVertices")
    ) #end of clone

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