FullLDCTracking_MarlinTrk Class Reference

=== FullLDCTracking_MarlinTrk Processor ===
Processor performing track finding procedure in the entire LDC detector by linking track segments found by the SiliconTracking module in the silicon detectors and by the LEPTracking module in TPC. More...

#include <FullLDCTracking_MarlinTrk.h>

Inheritance diagram for FullLDCTracking_MarlinTrk:

Public Member Functions
virtual Processor *	newProcessor ()
virtual void	init ()
virtual void	processRunHeader (LCRunHeader *run)
virtual void	processEvent (LCEvent *evt)
virtual void	check (LCEvent *evt)
virtual void	end ()

Protected Member Functions
void	prepareVectors (LCEvent *evt)
void	CleanUp ()
void	MergeTPCandSiTracks ()
void	MergeTPCandSiTracksII ()
TrackExtended *	CombineTracks (TrackExtended *tpcTrk, TrackExtended *siTrk, float maxAllowedOutliers, bool testCombinationOnly)
void	Sorting (TrackExtendedVec &trackVec)
void	SelectCombinedTracks ()
void	AddNotCombinedTracks ()
void	CheckTracks ()
void	AddNotAssignedHits ()
void	RemoveSplitTracks ()
void	AddTrackColToEvt (LCEvent *evt, TrackExtendedVec &trkVec, std::string TrkColName)
float	CompareTrk (TrackExtended *first, TrackExtended *second, float d0Cut, float z0Cut, int iopt)
float	CompareTrkII (TrackExtended *first, TrackExtended *second, float d0Cut, float z0Cut, int iopt, float &Angle)
float	CompareTrkIII (TrackExtended *first, TrackExtended *second, float d0Cut, float z0Cut, int iopt, float &Angle)
void	SortingTrackHitPairs (TrackHitPairVec &trackHitPairVec)
void	AssignSiHitsToTracks (TrackerHitExtendedVec hitVec, float dcut)
void	AssignTPCHitsToTracks (TrackerHitExtendedVec hitVec, float dcut)
void	AssignOuterHitsToTracks (TrackerHitExtendedVec hitVec, float dcut, int refit)
void	CreateExtrapolations ()
void	CleanUpExtrapolations ()
HelixClass *	GetExtrapolationHelix (TrackExtended *track)
void	PrintOutMerging (TrackExtended *firstTrackExt, TrackExtended *secondTrackExt, int iopt)
void	GeneralSorting (int *index, float *val, int direct, int nVal)
int	SegmentRadialOverlap (TrackExtended *pTracki, TrackExtended *pTrackj)
bool	VetoMerge (TrackExtended *firstTrackExt, TrackExtended *secondTrackExt)
int	getDetectorID (TrackerHit *hit)
int	getSideID (TrackerHit *hit)
int	getLayerID (TrackerHit *hit)
int	getModuleID (TrackerHit *hit)
int	getSensorID (TrackerHit *hit)
void	setupGearGeom (const gear::GearMgr *gearMgr)

Protected Attributes
int	_nRun
int	_nEvt
MarlinTrk::HelixFit *	_fastfitter
MarlinTrk::IMarlinTrkSystem *	_trksystem
	pointer to the IMarlinTrkSystem instance
std::string	_trkSystemName
bool	_MSOn
bool	_ElossOn
bool	_SmoothOn
std::string	_TPCTrackCollection
std::string	_SiTrackCollection
std::string	_TPCTrackMCPCollName
std::string	_SiTrackMCPCollName
std::string	_VTXTrackerHitCollection
std::string	_SITTrackerHitCollection
std::string	_SETTrackerHitCollection
std::string	_FTDPixelHitCollection
std::string	_FTDSpacePointCollection
std::string	_TPCTrackerHitCollection
std::string	_ETDTrackerHitCollection
std::string	_LDCTrackCollection
TrackExtendedVec	_allSiTracks
TrackExtendedVec	_allTPCTracks
TrackExtendedVec	_allCombinedTracks
TrackExtendedVec	_allNonCombinedTPCTracks
TrackExtendedVec	_allNonCombinedSiTracks
TrackExtendedVec	_trkImplVec
TrackerHitExtendedVec	_allTPCHits
TrackerHitExtendedVec	_allVTXHits
TrackerHitExtendedVec	_allFTDHits
TrackerHitExtendedVec	_allSITHits
TrackerHitExtendedVec	_allSETHits
TrackerHitExtendedVec	_allETDHits
float	PI
float	PIOVER2
float	TWOPI
float	_bField
float	_chi2PrefitCut
float	_chi2FitCut
int	_debug
float	_dPCutForMerging
float	_d0CutForMerging
float	_z0CutForMerging
float	_dOmegaForMerging
float	_angleForMerging
int	_forceMerging
float	_dPCutForForcedMerging
float	_d0CutForForcedMerging
float	_z0CutForForcedMerging
float	_dOmegaForForcedMerging
float	_angleForForcedMerging
int	_mergeTPCSegments
float	_dPCutToMergeTPC
float	_PtCutToMergeTPC
float	_d0CutToMergeTPC
float	_z0CutToMergeTPC
float	_cosThetaCutHighPtMerge
float	_cosThetaCutSoftHighPtMerge
float	_momDiffCutHighPtMerge
float	_momDiffCutSoftHighPtMerge
float	_hitDistanceCutHighPtMerge
float	_maxHitDistanceCutHighPtMerge
float	_maxFractionOfOutliersCutHighPtMerge
float	_vetoMergeMomentumCut
float	_initialTrackError_d0
float	_initialTrackError_phi0
float	_initialTrackError_omega
float	_initialTrackError_z0
float	_initialTrackError_tanL
double	_maxChi2PerHit
double	_minChi2ProbForSiliconTracks
float	_maxAllowedPercentageOfOutliersForTrackCombination
int	_maxAllowedSiHitRejectionsForTrackCombination
bool	_runMarlinTrkDiagnostics
std::string	_MarlinTrkDiagnosticsName
int	_nHitsExtrapolation
int	_cutOnTPCHits
int	_cutOnSiHits
int	_assignVTXHits
int	_assignFTDHits
int	_assignSITHits
int	_assignTPCHits
int	_assignSETHits
int	_assignETDHits
float	_distCutForVTXHits
float	_distCutForFTDHits
float	_distCutForSITHits
float	_distCutForTPCHits
float	_distCutForSETHits
float	_distCutForETDHits
float	_d0TrkCut
float	_z0TrkCut
int	_forbidOverlapInZTPC
int	_forbidOverlapInZComb
float	_energyLossErrorTPC
LCEvent *	_evt
std::map< TrackExtended *, HelixClass * >	_trackExtrapolatedHelix
std::set< TrackExtended * >	_candidateCombinedTracks
UTIL::BitField64 *	_encoder
double	_tpc_inner_r
double	_tpc_outer_r
double	_tpc_pad_height
int	_tpc_nrows
unsigned int	_nLayersVTX
unsigned int	_nLayersSIT
unsigned int	_nLayersSET
std::vector< float >	_zLayerFTD
unsigned int	_nLayersFTD
int	_nPhiFTD
bool	_petalBasedFTDWithOverlaps

Detailed Description

=== FullLDCTracking_MarlinTrk Processor ===
Processor performing track finding procedure in the entire LDC detector by linking track segments found by the SiliconTracking module in the silicon detectors and by the LEPTracking module in TPC.

Input collections and prerequisites

Processor requires collection of digitized vertex, sit, ftd, set, etd & tpc tracker hits and also the collections of tracks found in the silicon detectors and in TPC.

Output

Processor produces an LCIO collection of the Tracks. Each track is characterised by five parameters : Omega (signed curvuture), Tan(lambda) where lambda is the dip angle, Phi (azimuthal angle @ point of closest approach), D0 (signed impact parameter), Z0 (displacement along z axis at the point of closest approach to IP). Covariance matrix for these parameters is also provided. Only lower left corner of the covariance matrix is stored. The sequence of the covariance matrix elements assigned to track is the following:
(D0,D0)
(Phi,D0), (Phi,Phi)
(Omega,D0), (Omega,Phi), (Omega,Omega)
(Z0,D0), (Z0,Phi), (Z0,Omega), (Z0,Z0)
(TanL,D0), (TanL,Phi), (TanL,Omega), (TanL,Z0), (TanL,TanL)
The number of hits in the different subdetectors associated with each track can be accessed via method Track::getSubdetectorHitNumbers(). This method returns vector of integers :
number of VTX hits used in the track fit is the 1st element in this vector (Track::getSubdetectorHitNumbers()[0])
number of FTD hits used in the track fit is the 2nd element in this vector (Track::getSubdetectorHitNumbers()[1])
number of SIT hits used in the track fit is the 3d element in this vector (Track::getSubdetectorHitNumbers()[2])
number of TPC hits used in the track fit is the 4th element in this vector (Track::getSubdetectorHitNumbers()[3])
number of SET hits used in the track fit is the 5th element in this vector (Track::getSubdetectorHitNumbers()[4])
number of ETD hits used in the track fit is the 6th element in this vector (Track::getSubdetectorHitNumbers()[5])
total number of VTX hits in track is the 7th element in this vector (Track::getSubdetectorHitNumbers()[6])
total number of FTD hits in track is the 8th element in this vector (Track::getSubdetectorHitNumbers()[7])
total number of SIT hits in track is the 9th element in this vector (Track::getSubdetectorHitNumbers()[8])
total number of TPC hits in track is the 10th element in this vector (Track::getSubdetectorHitNumbers()[9])
total number of SET hits in track is the 11th element in this vector (Track::getSubdetectorHitNumbers()[10])
total number of ETD hits in track is the 12th element in this vector (Track::getSubdetectorHitNumbers()[11])
Output track collection has by default a name "LDCTracks".

Parameters

VTXHitCollection	name of input VTX TrackerHit collection (default parameter value : "VTXTrackerHits")
FTDPixelHitCollectionName	name of input FTD Pixel TrackerHit collection (default parameter value : "FTDPixelTrackerHits")
FTDSpacePointCollectionName	name of input FTD Space Point TrackerHit collection (default parameter value : "FTDSpacePoints")
SITHitCollection	name of input SIT TrackerHit collection (default parameter value : "SITTrackerHits")
TPCHitCollection	name of input TPC TrackerHit collection (default parameter value : "TPCTrackerHits")
SETHitCollection	name of input SET TrackerHit collection (default parameter value : "SETTrackerHits")
ETDHitCollection	name of input ETD TrackerHit collection (default parameter value : "ETDTrackerHits")
TPCTracks	collection name of TPC tracks (default parameter value : "TPCTracks")
TPCTracksMCPRelColl	Name of input TPC track to MC particle relation collection (default parameter value : "TPCTracksMCP")
SiTracks	collection name of Si tracks (default parameter value : "SiTracks")
SiTracksMCPRelColl	Name of input Si track to MC particle relation collection (default parameter value : "SiTracksMCP")
LDCTrackCollection	name of the output LDC track collection (default parameter value : "LDCTracks")
Chi2FitCut	cut on the Chi2/Ndf of the track fit (default parameter value : 100.0)
Chi2PrefitCut	cut on the prefit Chi2 of the track candidate, prefit is done with the simple helix hypothesis (default parameter value : 1e+5)
AngleCutForMerging	cut on opening angle between particle momentum reconstructed with TPC and momentum reconstructed with the Silicon detectors. If the opening angle is smaller that this cut the track segment in Silicon trackers and in TPC are tested for their compatibility (default parameter value : 0.10)
OmegaCutForMerging	cut on the relative difference in the track Omega parameter reconstructed with TPC and with Si detectors. If the relative difference is smaller than this cut, the track segments in TPC and Si are tested for their compatibility (default parameter value : 0.25)
D0CutForMerging	Upper cutoff on the difference in D0 [mm] to allow for merging of the Si and TPC segments (default parameter value : 500)
Z0CutForMerging	Upper cutoff on the difference in Z0 [mm] to allow for merging of the Si and TPC segments (default parameter value : 1000)
Debug	flag to allow for printout of debug information, if set to 1 debugging printout is activated (default parameter value : 1)
ForceSiTPCMerging	This flag steers merging of Si and TPC track segments. If ForceMerging=1 Si and TPC track segments are forced to be merged if the opening angle between Si track momentum and TPC track momentum is less than AngleCutForForcedMerging (see below) and difference in tracks parameters Omega is less than OmegaCutForForcedMerging (see below) (default parameter value : 0)
AngleCutForForcedMerging	cut on opening angle between Si track momentum and TPC track momentum. Used to steer forced merging of Si and TPC track segments. (default parameter value : 0.05)
OmegaCutForForcedMerging	cut on the difference between Si and TPC tracks parameter Omega. Used to steer forced merging of Si and TPC track segments. Relative errors are compared. (default parameter value : 0.15)
D0CutForForcedMerging	Upper cutoff on the difference in D0 to allow for forced merging of the Si and TPC segments (default parameter value : 50)
Z0CutForForcedMerging	Upper cutoff on the difference in Z0 to allow for forced merging of the Si and TPC segments (default parameter value : 200)
ForceTPCSegmentsMerging	If this flag is set to 1, the code attempts to merge TPC segments from the low pt splitted loopers (default parameter value : 1)
D0CutToMergeTPCSegments	cut on the difference in the track parameter d0 [mm] to allow for merging TPC segments (default parameter value : 100)
Z0CutToMergeTPCSegments	cut on the difference in the track parameter z0 [mm] to allow for merging TPC segments (default parameter value : 5000)
DeltaPCutToMergeTPCSegments	cut on the magnitude [GeV/c] of the vectorial difference of the momentum vectors, associated with TPC segments, for the TPC segment's merging procedure (default parameter value : 0.1)
PtCutToMergeTPCSegments	lower cutoff on Pt of the TPC segments of the looping track for the merging procedure. If transverse momentum of the segments is less than cutoff the segments are allowed to be merged. (default parameter value : 1.2)
AssignTPCHits	If this flag is set to 1, the code attempts to assign left-over TPC hits to the accepted track candidates. No track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
AssignETDHits	If this flag is set to 1, the code attempts to assign ETD hits to the accepted track candidates. No track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
AssignVTXHits	If this flag is set to 1, the code attempts to assign left-over VTX hits to the accepted track candidates. Track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
AssignFTDHits	If this flag is set to 1, the code attempts to assign left-over FTD hits to the accepted track candidates. Track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
AssignSITHits	If this flag is set to 1, the code attempts to assign left-over SIT hits to the accepted track candidates. Track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
AssignSETHits	If this flag is set to 1, the code attempts to assign SET hits to the accepted track candidates. Track refit is done in case when hit is assigned to the existing track (default parameter value : 1)
TPCHitToTrackDistance	Cut on the distance between left-over TPC hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 15.0)
VTXHitToTrackDistance	Cut on the distance between left-over VTX hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 1.5)
FTDHitToTrackDistance	Cut on the distance between left-over FTD hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 2.0)
SITHitToTrackDistance	Cut on the distance between left-over SIT hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 2.0)
SETHitToTrackDistance	Cut on the distance between SET hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 2.0)
ETDHitToTrackDistance	Cut on the distance between ETD hit and the track helix to allow for assignment of the hit with a given track (default parameter value : 10.0)
NHitsExtrapolation	Number of the last track hits for extrapolating helix to the outer tracking detectors (SET, ETD) (default parameter value : 35)
CutOnTPCHits	minimal number of TPC hits, used in the track fit, which is required for tracks which have no hits from the Si detectors (default parameter value : 35)
CutOnTrackD0	cut on the d0 parameter of the track. If the d0 parameter is greater that this cut, track is rejected (default parameter value : 500)
CutOnTrackZ0	cut on the z0 parameter of the track. If the z0 parameter is greater that this cut, track is rejected (default parameter value : 500)
ForbidOverlapInZTPC	If this flag is set to 1 then merging of the TPC semiloops is forbiden for segment overlapping in z (default parameter value : 0)
ForbidOverlapInZComb	If this flag is set to 1 then merging of left-over TPC semiloop and combined Si-TPC track is their segments overlap in z (default parameter value : 0)
cosThetaCutHighPtMerge	cut on cos theta between the two momentum vectors when considering merger of high Pt tracks (default is 0.99)
cosThetaCutSoftHighPtMerge	cut on the cos theta between the two momentum vectors when considering merger of high Pt tracks for softer dp/p cut (default is 0.998)
momDiffCutHighPtMerge	cut on dp/p when considering merger of high Pt tracks (default is 0.01 [1/GeV])
momDiffCutSoftHighPtMerge	softer cut on dp/p when considering merger of high Pt tracks (default is 0.25 [1/GeV])
hitDistanceCutHighPtMerge	cut on 3D distance between hit and helix extrapolation when considering merger of high Pt tracks (default is 25.0 [mm])
maxHitDistanceCutHighPtMerge	cut for max 3D distance between any hit and helix extrapolation when considering merger of high Pt tracks (default is 50.0 [mm])
maxFractionOfOutliersCutHighPtMerge	cut on maximum fraction of outliers when considering merger of high Pt tracks (default is 0.95 )

Author

A. Raspereza (MPI Munich)

Member Function Documentation

void FullLDCTracking_MarlinTrk::AssignTPCHitsToTracks ( TrackerHitExtendedVec  hitVec, float  dcut  )

protected

std::cout << iH << " hit is not assigned : distance to closest track = " << minDist << std::endl; }

void FullLDCTracking_MarlinTrk::GeneralSorting ( int *  index, float *  val, int  direct, int  nVal  )

protected

Sorting of index vector in ascending (0) /descending (!=0) order of val

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The documentation for this class was generated from the following files:

• FullLDCTracking_MarlinTrk.h
• FullLDCTracking_MarlinTrk.cc