lowPtGsfElectronSequence_cff.py

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import FWCore.ParameterSet.Config as cms

# Modifier for FastSim
from Configuration.Eras.Modifier_fastSim_cff import fastSim

# PFRecTracks from generalTracks
from RecoParticleFlow.PFTracking.pfTrack_cfi import *
lowPtGsfElePfTracks = pfTrack.clone(
    TkColList           = ['generalTracks'],
    GsfTracksInEvents   = False,
    GsfTrackModuleLabel = ''
)
fastSim.toModify(lowPtGsfElePfTracks,TkColList = ['generalTracksBeforeMixing'])

# Low pT ElectronSeeds
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronSeeds_cfi import *

# Electron track candidates
from TrackingTools.GsfTracking.CkfElectronCandidateMaker_cff import *
lowPtGsfEleTrajectoryFilter = TrajectoryFilterForElectrons.clone(
    minPt = 0.,
    minimumNumberOfHits = 3
)
lowPtGsfEleTrajectoryBuilder = TrajectoryBuilderForElectrons.clone(
    trajectoryFilter = dict(refToPSet_ = 'lowPtGsfEleTrajectoryFilter')
)
lowPtGsfEleCkfTrackCandidates = electronCkfTrackCandidates.clone(
    TrajectoryBuilderPSet = dict(refToPSet_ = 'lowPtGsfEleTrajectoryBuilder'),
    src = 'lowPtGsfElectronSeeds'
)
import FastSimulation.Tracking.electronCkfTrackCandidates_cff
fastLowPtGsfTkfTrackCandidates = FastSimulation.Tracking.electronCkfTrackCandidates_cff.electronCkfTrackCandidates.clone(src = "lowPtGsfElectronSeeds")

# GsfTracks
from TrackingTools.GsfTracking.GsfElectronGsfFit_cff import *
lowPtGsfEleFittingSmoother = GsfElectronFittingSmoother.clone(
    ComponentName = 'lowPtGsfEleFittingSmoother',
    MinNumberOfHits = 2
)
from TrackingTools.GsfTracking.GsfElectronGsfFit_cff import * 
lowPtGsfEleGsfTracks = electronGsfTracks.clone(
    Fitter = 'lowPtGsfEleFittingSmoother',
    src = 'lowPtGsfEleCkfTrackCandidates'
)
fastSim.toModify(lowPtGsfEleGsfTracks,src = "fastLowPtGsfTkfTrackCandidates")

# GSFTrack to track association
from RecoEgamma.EgammaElectronProducers.lowPtGsfToTrackLinks_cfi import lowPtGsfToTrackLinks

# GsfPFRecTracks
from RecoParticleFlow.PFTracking.pfTrackElec_cfi import *
lowPtGsfElePfGsfTracks = pfTrackElec.clone(
    GsfTrackModuleLabel   = 'lowPtGsfEleGsfTracks',
    PFRecTrackLabel       = 'lowPtGsfElePfTracks',
    applyGsfTrackCleaning = False,
    useFifthStepForTrackerDrivenGsf = True
)
# SuperCluster generator and matching to GSF tracks
# Below relies on the following default configurations:
# RecoParticleFlow/PFClusterProducer/python/particleFlowClusterECALUncorrected_cfi.py
# RecoParticleFlow/PFClusterProducer/python/particleFlowClusterECAL_cff.py
# (particleFlowClusterECAL_cfi is generated automatically)
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronSuperClusters_cfi import lowPtGsfElectronSuperClusters

# Low pT electron cores
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronCores_cff import lowPtGsfElectronCores

# Low pT electrons
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronsPreRegression_cfi import *
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectrons_cfi import *

# Low pT Electron value maps
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronSeedValueMaps_cff import lowPtGsfElectronSeedValueMaps
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronSeedValueMaps_cff import rekeyLowPtGsfElectronSeedValueMaps

# Low pT Electron ID
from RecoEgamma.EgammaElectronProducers.lowPtGsfElectronID_cfi import lowPtGsfElectronID

# Full sequence 
lowPtGsfElectronTask = cms.Task(lowPtGsfElePfTracks,
                                lowPtGsfElectronSeeds,
                                lowPtGsfEleCkfTrackCandidates,
                                lowPtGsfEleGsfTracks,
                                lowPtGsfToTrackLinks,
                                lowPtGsfElePfGsfTracks,
                                lowPtGsfElectronSuperClusters,
                                lowPtGsfElectronCores,
                                lowPtGsfElectronsPreRegression,
                                lowPtGsfElectrons,
                                lowPtGsfElectronSeedValueMaps,
                                rekeyLowPtGsfElectronSeedValueMaps,
                                lowPtGsfElectronID
                                )
lowPtGsfElectronSequence = cms.Sequence(lowPtGsfElectronTask)

_fastSim_lowPtGsfElectronTask = lowPtGsfElectronTask.copy()
_fastSim_lowPtGsfElectronTask.replace(lowPtGsfElectronSeeds, cms.Task(lowPtGsfElectronSeedsTmp,lowPtGsfElectronSeeds))
_fastSim_lowPtGsfElectronTask.replace(lowPtGsfEleCkfTrackCandidates, fastLowPtGsfTkfTrackCandidates)
fastSim.toReplaceWith(lowPtGsfElectronTask, _fastSim_lowPtGsfElectronTask)