Class to provide momentum-related information from ECLClusters. More...

#include <ClusterUtils.h>

Collaboration diagram for ClusterUtils:

[legend]

Public Member Functions
	ClusterUtils ()
	Constructor.

const ROOT::Math::PxPyPzEVector	GetCluster4MomentumFromCluster (const ECLCluster *cluster, ECLCluster::EHypothesisBit hypo)
	Returns cluster four momentum vector. More...

const ROOT::Math::PxPyPzEVector	Get4MomentumFromCluster (const ECLCluster *cluster, ECLCluster::EHypothesisBit hypo)
	Returns four momentum vector. More...

const ROOT::Math::PxPyPzEVector	Get4MomentumFromCluster (const ECLCluster *cluster, const ROOT::Math::XYZVector &vertex, ECLCluster::EHypothesisBit hypo)
	Returns four momentum vector. More...

const TMatrixD	GetJacobiMatrix4x6FromCluster (const ECLCluster *cluster, ECLCluster::EHypothesisBit hypo)
	Returns 4x6 Jacobi matrix (px, py, pz, E) More...

const TMatrixD	GetJacobiMatrix4x6FromCluster (const ECLCluster *cluster, const ROOT::Math::XYZVector &vertex, ECLCluster::EHypothesisBit hypo)
	Returns 4x6 Jacobi matrix (px, py, pz, E) More...

const TMatrixDSym	GetCovarianceMatrix4x4FromCluster (const ECLCluster *cluster, const TMatrixD &jacobiMatrix)
	Returns 4x4 covariance matrix (px, py, pz, E) More...

const TMatrixDSym	GetCovarianceMatrix4x4FromCluster (const ECLCluster *cluster, const TMatrixDSym &covmatvertex, const TMatrixD &jacobiMatrix)
	Returns 4x4 covariance matrix (px, py, pz, E) More...

const TMatrixDSym	GetCovarianceMatrix7x7FromCluster (const ECLCluster *cluster, const TMatrixD &jacobiMatrix)
	Returns 7x7 covariance matrix (px, py, pz, E, x, y, z) More...

const TMatrixDSym	GetCovarianceMatrix7x7FromCluster (const ECLCluster *cluster, const TMatrixDSym &covmatvertex, const TMatrixD &jacobiMatrix)
	Returns 7x7 covariance matrix (px, py, pz, E, x, y, z) More...

const ROOT::Math::XYZVector	GetIPPosition ()
	Returns default IP position from beam parameters. More...

const TMatrixDSym	GetIPPositionCovarianceMatrix ()
	Returns default IP position covariance matrix from beam parameters. More...

Private Attributes
DBObjPtr< BeamSpot >	m_beamSpotDB
	Beam spot database object.

Detailed Description

Class to provide momentum-related information from ECLClusters.

This requires the prior knowledge of the particle type (e.g., photon), and a vertex hypothesis. The default vertex hypothesis is taken from the beamparameters.

Definition at line 35 of file ClusterUtils.h.

Member Function Documentation

◆ Get4MomentumFromCluster() [1/2]

const ROOT::Math::PxPyPzEVector Get4MomentumFromCluster	(	const ECLCluster *	cluster,
		const ROOT::Math::XYZVector &	vertex,
		ECLCluster::EHypothesisBit	hypo
	)

Returns four momentum vector.

Returns: const four momentum vector

◆ Get4MomentumFromCluster() [2/2]

const PxPyPzEVector Get4MomentumFromCluster	(	const ECLCluster *	cluster,
		ECLCluster::EHypothesisBit	hypo
	)

Returns four momentum vector.

Returns: const four momentum vector

Definition at line 25 of file ClusterUtils.cc.

 {
  
   // Use the default vertex from the beam parameters if none is given.
   return Get4MomentumFromCluster(cluster, GetIPPosition(), hypo);
 }

◆ GetCluster4MomentumFromCluster()

const PxPyPzEVector GetCluster4MomentumFromCluster	(	const ECLCluster *	cluster,
		ECLCluster::EHypothesisBit	hypo
	)

Returns cluster four momentum vector.

Returns: const cluster four momentum vector

Definition at line 19 of file ClusterUtils.cc.

◆ GetCovarianceMatrix4x4FromCluster() [1/2]

const TMatrixDSym GetCovarianceMatrix4x4FromCluster	(	const ECLCluster *	cluster,
		const TMatrixD &	jacobiMatrix
	)

Returns 4x4 covariance matrix (px, py, pz, E)

Returns: const TMatrixDSym

Definition at line 135 of file ClusterUtils.cc.

◆ GetCovarianceMatrix4x4FromCluster() [2/2]

const TMatrixDSym GetCovarianceMatrix4x4FromCluster	(	const ECLCluster *	cluster,
		const TMatrixDSym &	covmatvertex,
		const TMatrixD &	jacobiMatrix
	)

Returns 4x4 covariance matrix (px, py, pz, E)

Returns: const TMatrixDSym

Definition at line 141 of file ClusterUtils.cc.

◆ GetCovarianceMatrix7x7FromCluster() [1/2]

const TMatrixDSym GetCovarianceMatrix7x7FromCluster	(	const ECLCluster *	cluster,
		const TMatrixD &	jacobiMatrix
	)

Returns 7x7 covariance matrix (px, py, pz, E, x, y, z)

Returns: const TMatrixDSym

Definition at line 164 of file ClusterUtils.cc.

◆ GetCovarianceMatrix7x7FromCluster() [2/2]

const TMatrixDSym GetCovarianceMatrix7x7FromCluster	(	const ECLCluster *	cluster,
		const TMatrixDSym &	covmatvertex,
		const TMatrixD &	jacobiMatrix
	)

Returns 7x7 covariance matrix (px, py, pz, E, x, y, z)

Returns: const TMatrixDSym

Definition at line 170 of file ClusterUtils.cc.

◆ GetIPPosition()

const XYZVector GetIPPosition ( )

Returns default IP position from beam parameters.

Returns: const XYZVector

Definition at line 196 of file ClusterUtils.cc.

◆ GetIPPositionCovarianceMatrix()

const TMatrixDSym GetIPPositionCovarianceMatrix ( )

Returns default IP position covariance matrix from beam parameters.

Returns: const TMatrixDSym

Definition at line 205 of file ClusterUtils.cc.

◆ GetJacobiMatrix4x6FromCluster() [1/2]

const TMatrixD GetJacobiMatrix4x6FromCluster	(	const ECLCluster *	cluster,
		const ROOT::Math::XYZVector &	vertex,
		ECLCluster::EHypothesisBit	hypo
	)

Returns 4x6 Jacobi matrix (px, py, pz, E)

Returns: const TMatrixD

◆ GetJacobiMatrix4x6FromCluster() [2/2]

const TMatrixD GetJacobiMatrix4x6FromCluster	(	const ECLCluster *	cluster,
		ECLCluster::EHypothesisBit	hypo
	)