Tools needed for the VXD momentum estimation to, e.g. More...

#include <VXDMomentumEstimationTools.h>

Public Member Functions
double	getDEDX (const ClusterType &cluster, const ROOT::Math::XYZVector &momentum, const ROOT::Math::XYZVector &position, short charge) const
	Main function: return dEdX for a cluster and the given momentum, position and charge seeds.

double	getDEDXWithThickness (const ClusterType &cluster) const
	Return dEdX but not with dX = path length but with dX = thickness of cluster.

double	getThicknessOfCluster (const ClusterType &cluster) const
	Return the thickness of a cluster.

double	getWidthOfCluster (const ClusterType &cluster) const
	Return the thickness of a cluster.

double	getLengthOfCluster (const ClusterType &cluster) const
	Return the thickness of a cluster.

double	getRadiusOfCluster (const ClusterType &cluster) const
	Returns the distance from the interaction point to the cluster in the r-phi-plane.

VxdID::baseType	getLayerOfCluster (const ClusterType &cluster) const
	Return the layer of the cluster.

VxdID::baseType	getLadderOfCluster (const ClusterType &cluster) const
	Return the ladder of the cluster.

VxdID::baseType	getSensorNumberOfCluster (const ClusterType &cluster) const
	Return the sensor number of the cluster.

VxdID::baseType	getSegmentNumberOfCluster (const ClusterType &cluster) const
	Return the segment number of the cluster.

double	getCalibratedCharge (const ClusterType &cluster) const
	Return the charge of the cluster (in ADC count) calibrated with a factor of ~0.6 for pxd hits. More...

ROOT::Math::XYZVector	getEntryMomentumOfMCParticle (const ClusterType &) const
	Return the momentum of the simulated MCParticle at this cluster (by using the TrueHit associated with this cluster) This method is implemented for the two cluster types differently below.

ROOT::Math::XYZVector	getEntryPositionOfMCParticle (const ClusterType &) const
	Return the entry position of the simulated MCParticle at this cluster (by using the TrueHit associated with this cluster) This method is implemented for the two cluster types differently below.

double	getPathLength (const ClusterType &cluster, const Helix &trajectory) const
	Return the path length of a particle with the given helix that goes through the cluster. More...

ROOT::Math::XYZVector	getEntryMomentumOfMCParticle (const PXDCluster &cluster) const
	We have to handle PXD and SVD differently here.

ROOT::Math::XYZVector	getEntryMomentumOfMCParticle (const SVDCluster &cluster) const
	We have to handle PXD and SVD differently here.

ROOT::Math::XYZVector	getEntryPositionOfMCParticle (const PXDCluster &cluster) const
	We have to handle PXD and SVD differently here.

ROOT::Math::XYZVector	getEntryPositionOfMCParticle (const SVDCluster &cluster) const
	We have to handle PXD and SVD differently here.

Static Public Member Functions
static const VXDMomentumEstimationTools &	getInstance ()
	Use this class as singleton.

Private Member Functions
	VXDMomentumEstimationTools ()
	Do not create this class.

	VXDMomentumEstimationTools (const VXDMomentumEstimationTools &)
	Do not create this class.

VXDMomentumEstimationTools &	operator= (const VXDMomentumEstimationTools &)
	Do not create this class.

double	getCalibration () const
	For SVD the calibration is 1, for PXD (see below) it is ~0.6.

double	getCalibration () const
	We only need a calibration for the PXD Clusters.

Private Attributes
const double	m_layerPositions [6] = {1.42, 2.18, 3.81, 8.0, 10.51, 13.51}
	the layer positions in the case we do not have a SpacePoint we can look at.

Detailed Description

template<class ClusterType>
class Belle2::VXDMomentumEstimationTools< ClusterType >

Tools needed for the VXD momentum estimation to, e.g.

calculate the path length or properties of the hits. Can also be used for other things.

Definition at line 32 of file VXDMomentumEstimationTools.h.

Member Function Documentation

◆ getCalibratedCharge()

double getCalibratedCharge ( const ClusterType & cluster ) const

inline

Return the charge of the cluster (in ADC count) calibrated with a factor of ~0.6 for pxd hits.

This factor can be seen in data (and is calculated from that) and has probably something to do with the different readout of the hit types.

Definition at line 149 of file VXDMomentumEstimationTools.h.

     {
       const double charge = cluster.getCharge();
       const double calibration = getCalibration();
  
       return calibration * charge;
     }

◆ getPathLength()

double getPathLength	(	const ClusterType &	cluster,
		const Helix &	trajectory
	)		const

inline

Return the path length of a particle with the given helix that goes through the cluster.

If the helix does not pass the cluster, return the thickness of the cluster instead. It is assumed that the cluster is passed from bottom to top and not transverse or something. Also we assume every cluster to not be tilted. This is wrong for the wedge cluster. We have to find a way to handle those cases correctly!

Definition at line 179 of file VXDMomentumEstimationTools.h.

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

tracking/vxdMomentumEstimation/include/VXDMomentumEstimationTools.h

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

template<class ClusterType> class Belle2::VXDMomentumEstimationTools< ClusterType >

Member Function Documentation

◆ getCalibratedCharge()

◆ getPathLength()

template<class ClusterType>
class Belle2::VXDMomentumEstimationTools< ClusterType >