Phase1PU140_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
from RecoPixelVertexing.PixelTriplets.quadrupletseedmerging_cff import PixelSeedMergerQuadruplets
initialStepSeeds = RecoTracker.TkSeedGenerator.GlobalSeedsFromTriplets_cff.globalSeedsFromTriplets.clone(
    RegionFactoryPSet = RegionPsetFomBeamSpotBlock.clone(
        ComponentName = cms.string('GlobalRegionProducerFromBeamSpot'),
        RegionPSet = RegionPsetFomBeamSpotBlock.RegionPSet.clone(
            ptMin = 0.8,
            originRadius = 0.02,
            nSigmaZ = 4.0
            )
    ),
    SeedMergerPSet = cms.PSet(
        layerList = PixelSeedMergerQuadruplets,
    addRemainingTriplets = cms.bool(False),
    mergeTriplets = cms.bool(True),
    ttrhBuilderLabel = cms.string('PixelTTRHBuilderWithoutAngle')
    )
)

from RecoPixelVertexing.PixelLowPtUtilities.ClusterShapeHitFilterESProducer_cfi import *
import RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi
initialStepSeeds.OrderedHitsFactoryPSet.GeneratorPSet.SeedComparitorPSet = RecoPixelVertexing.PixelLowPtUtilities.LowPtClusterShapeSeedComparitor_cfi.LowPtClusterShapeSeedComparitor
initialStepSeeds.ClusterCheckPSet.doClusterCheck = cms.bool(False)
initialStepSeeds.OrderedHitsFactoryPSet.GeneratorPSet.maxElement = cms.uint32(0)

# 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)
)

import RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi
initialStepTrajectoryBuilder = RecoTracker.CkfPattern.GroupedCkfTrajectoryBuilder_cfi.GroupedCkfTrajectoryBuilder.clone(
    trajectoryFilter = cms.PSet(refToPSet_ = cms.string('initialStepTrajectoryFilter')),
    alwaysUseInvalidHits = True,
    maxCand = 6,
    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'),
    TTRHBuilder=cms.string('WithTrackAngle')
)

# Final selection
import RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi
initialStepSelector = RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.multiTrackSelector.clone(
    src='initialStepTracks',
    trackSelectors= cms.VPSet(
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.looseMTS.clone(
            name = 'initialStepLoose',
            chi2n_par = 2.0,
            res_par = ( 0.003, 0.002 ),
            minNumberLayers = 3,
            maxNumberLostLayers = 3,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.7, 4.0 ),
            dz_par1 = ( 0.8, 4.0 ),
            d0_par2 = ( 0.4, 4.0 ),
            dz_par2 = ( 0.6, 4.0 )
            ), #end of pset
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.tightMTS.clone(
            name = 'initialStepTight',
            preFilterName = 'initialStepLoose',
            chi2n_par = 1.0,
            res_par = ( 0.003, 0.002 ),
            minNumberLayers = 3,
            maxNumberLostLayers = 2,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.6, 4.0 ),
            dz_par1 = ( 0.7, 4.0 ),
            d0_par2 = ( 0.35, 4.0 ),
            dz_par2 = ( 0.5, 4.0 )
            ),
        RecoTracker.FinalTrackSelectors.multiTrackSelector_cfi.highpurityMTS.clone(
            name = 'initialStep',
            preFilterName = 'initialStepTight',
            chi2n_par = 0.7,
            res_par = ( 0.003, 0.001 ),
            minNumberLayers = 3,
            maxNumberLostLayers = 2,
            minNumber3DLayers = 3,
            d0_par1 = ( 0.5, 4.0 ),
            dz_par1 = ( 0.7, 4.0 ),
            d0_par2 = ( 0.25, 4.0 ),
            dz_par2 = ( 0.4, 4.0 )
            ),
        ) #end of vpset
    ) #end of clone

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