TrackBase_t< TTrackCluster > Struct Template Reference

Struct to hold variables from a track which contains a vector of data type like TrackCluster. More...

#include <PXDPerformanceStructs.h>

Public Member Functions
	TrackBase_t ()
	Default constructor.
void	setTrackVariables (const TrackFitResult *tfrPtr, const ROOT::Math::XYZVector &ip)
	update track level variables from TrackFitResult
void	setValues (const RecoTrack &recoTrack, const ROOT::Math::XYZVector &ip=ROOT::Math::XYZVector(0, 0, 0), const std::string &recoTracksName="", const std::string &pxdInterceptsName="", const std::string &pxdTrackClustersName="PXDClustersFromTracks")
	Update values from a RecoTrack.

Public Attributes
float	d0
	Impact parameter in r-phi.
float	z0
	Impact parameter in z.
float	phi0
	Track direction in r-phi.
float	pt
	Transverse momentum.
float	tanLambda
	Tangent of the dip angle.
float	d0p
	Corrected impact parameter in r-phi.
float	z0p
	Corrected impact parameter in z.
unsigned short	nPXDHits
	Number of PXD Hits.
unsigned short	nSVDHits
	Number of SVD Hits.
unsigned short	nCDCHits
	Number of CDC Hits.
std::vector< TTrackCluster >	trackClusters
	Vector of track cluster structs.

Detailed Description

template<typename TTrackCluster>
struct Belle2::PXD::TrackBase_t< TTrackCluster >

Struct to hold variables from a track which contains a vector of data type like TrackCluster.

Definition at line 112 of file PXDPerformanceStructs.h.

Constructor & Destructor Documentation

TrackBase_t()

TrackBase_t ( )

inline

Default constructor.

Definition at line 114 of file PXDPerformanceStructs.h.

                   : d0(0.0), z0(0.0), phi0(0.0), pt(0.0), tanLambda(0.0),
        d0p(0.0), z0p(0.0), nPXDHits(0), nSVDHits(0), nCDCHits(0) {}

Member Function Documentation

setTrackVariables()

void setTrackVariables	(	const TrackFitResult *	tfrPtr,
		const ROOT::Math::XYZVector &	ip
	)

update track level variables from TrackFitResult

Template implementation.

Parameters

tfrPtr	a pointer of TrackFitResult
ip	The interaction point for correcting d0 and z0

Definition at line 157 of file PXDPerformanceStructs.h.

    {
      if (!tfrPtr) {
        B2ERROR("Expect the track fit result. Found Nothing!");
      }
      nCDCHits = tfrPtr->getHitPatternCDC().getNHits();
      nSVDHits = tfrPtr->getHitPatternVXD().getNSVDHits();
      nPXDHits = tfrPtr->getHitPatternVXD().getNPXDHits();
      tanLambda = tfrPtr->getCotTheta();
      pt = tfrPtr->getMomentum().Rho();
      d0 = tfrPtr->getD0();
      z0 = tfrPtr->getZ0();
      phi0 = tfrPtr->getPhi0();
      d0p = d0;
      z0p = z0;
      if (ip != ROOT::Math::XYZVector(0, 0, 0)) {
        // get a helix and change coordinate origin to ip
        auto uHelix = tfrPtr->getUncertainHelix();
        uHelix.passiveMoveBy(ip);
        d0p = uHelix.getD0();
        z0p = uHelix.getZ0();
      }
    }

setValues()

void setValues	(	const RecoTrack &	recoTrack,
		const ROOT::Math::XYZVector &	ip = ROOT::Math::XYZVector(0, 0, 0),
		const std::string &	recoTracksName = "",
		const std::string &	pxdInterceptsName = "",
		const std::string &	pxdTrackClustersName = "PXDClustersFromTracks"
	)

Update values from a RecoTrack.

Parameters

recoTrack	A RecoTrack object.
ip	The interaction point for correcting d0 and z0
recoTracksName	Name of RecoTrack collection
pxdInterceptsName	Name of PXDIntercept collection
pxdTrackClustersName	Name of track matched PXDClusters

Definition at line 184 of file PXDPerformanceStructs.h.

    {
      // get Track pointer
      auto trackPtr = recoTrack.getRelated<Track>("Tracks");
      if (!trackPtr) {
        B2ERROR("Expect a track for fitted recotracks. Found nothing!");
      }
 
      // get trackFitResult pointer
      auto tfrPtr = trackPtr->getTrackFitResultWithClosestMass(
                      Const::pion); // always try to use pion as electron fit doesn't work properly.
      setTrackVariables(tfrPtr, ip);
 
      //RelationVector<PXDIntercept> pxdIntercepts = recoTrack.getRelationsTo<PXDIntercept>();
      auto pxdIntercepts = recoTrack.getRelationsTo<PXDIntercept>(pxdInterceptsName);
      for (auto& pxdIntercept : pxdIntercepts) {
        TTrackCluster temp;
        // Only push a TrackCluster when setValues succeeds
        if (temp.setValues(pxdIntercept, recoTracksName, pxdTrackClustersName))
          trackClusters.push_back(temp);
      }
    }

Member Data Documentation

d0

float d0

Impact parameter in r-phi.

Definition at line 136 of file PXDPerformanceStructs.h.

d0p

float d0p

Corrected impact parameter in r-phi.

Definition at line 141 of file PXDPerformanceStructs.h.

nCDCHits

unsigned short nCDCHits

Number of CDC Hits.

Definition at line 145 of file PXDPerformanceStructs.h.

nPXDHits

unsigned short nPXDHits

Number of PXD Hits.

Definition at line 143 of file PXDPerformanceStructs.h.

nSVDHits

unsigned short nSVDHits

Number of SVD Hits.

Definition at line 144 of file PXDPerformanceStructs.h.

phi0

float phi0

Track direction in r-phi.

Definition at line 138 of file PXDPerformanceStructs.h.

pt

float pt

Transverse momentum.

Definition at line 139 of file PXDPerformanceStructs.h.

tanLambda

float tanLambda

Tangent of the dip angle.

Definition at line 140 of file PXDPerformanceStructs.h.

trackClusters

std::vector<TTrackCluster> trackClusters

Vector of track cluster structs.

Definition at line 146 of file PXDPerformanceStructs.h.

z0

float z0

Impact parameter in z.

Definition at line 137 of file PXDPerformanceStructs.h.

z0p

float z0p

Corrected impact parameter in z.

Definition at line 142 of file PXDPerformanceStructs.h.

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The documentation for this struct was generated from the following file:

• pxd/utilities/include/PXDPerformanceStructs.h