Belle2::KlongId Namespace Reference

Helper functions for all klid modules to improve readability of the code. More...

Functions
int	BelleTrackFlag (const Belle2::KLMCluster &cluster, const float angle=0.26)
	get Belle stle track flag
int	BelleECLFlag (const Belle2::KLMCluster &cluster, const float angle=0.26)
	get Belle stle ECL flag
int	mcParticleIsBeamBKG (const Belle2::MCParticle *part)
	return if MCparticle is beambkg
int	mcParticleIsKlong (Belle2::MCParticle *part)
	return the mc hirachy of the klong 0:not a klong 1:final particle, 2: klong is mother etc
bool	isKLMClusterSignal (const Belle2::KLMCluster &cluster, float mcWeigthCut=0.66)
	checks if a cluster is signal under the mcWeightcondition (mcWeight = energy deposition)
bool	isECLClusterSignal (const Belle2::ECLCluster &cluster, float mcWeigthCut=0.66)
	checks if a cluster is signal under the mcWeightcondition (mcWeight = energy deposition)
int	isMCParticlePDG (Belle2::MCParticle *part, int pdg)
	return if mc particle has a certain pdg in the decay chain
int	getPrimaryPDG (Belle2::MCParticle *part)
	return if mc particles primary pdg. More...
std::pair< Belle2::ECLCluster *, double >	findClosestECLCluster (const ROOT::Math::XYZVector &klmClusterPosition, const Belle2::ECLCluster::EHypothesisBit eclhypothesis=Belle2::ECLCluster::EHypothesisBit::c_neutralHadron)
	Find the closest ECLCluster with a neutral hadron hypothesis, and return it with its distance. More...
std::tuple< const Belle2::KLMCluster *, double, double >	findClosestKLMCluster (const ROOT::Math::XYZVector &klmClusterPosition)
	find nearest KLMCluster, tis distance and the av intercluster distance
std::tuple< Belle2::RecoTrack *, double, std::unique_ptr< const ROOT::Math::XYZVector > >	findClosestTrack (const ROOT::Math::XYZVector &clusterPosition, float cutAngle)
	find nearest genfit track and return it and its distance

Detailed Description

Helper functions for all klid modules to improve readability of the code.

Function Documentation

findClosestECLCluster()

std::pair<Belle2::ECLCluster*, double> Belle2::KlongId::findClosestECLCluster	(	const ROOT::Math::XYZVector &	klmClusterPosition,
		const Belle2::ECLCluster::EHypothesisBit	eclhypothesis = Belle2::ECLCluster::EHypothesisBit::c_neutralHadron
	)

Find the closest ECLCluster with a neutral hadron hypothesis, and return it with its distance.

If there are no suitabile ECLClusters, a nullptr is returned.

Definition at line 203 of file KlId.h.

  {
 
    Belle2::ECLCluster* closestECL = nullptr;
    double closestECLAngleDist = 1e10;
    Belle2::StoreArray<Belle2::ECLCluster> eclClusters;
 
    if (eclClusters.getEntries() > 0) {
      int index = 0;
      int indexOfClosestCluster = -1;
      for (Belle2::ECLCluster& eclcluster : eclClusters) {
 
        if (eclcluster.hasHypothesis(eclhypothesis)) {
 
          const ROOT::Math::XYZVector& eclclusterPos = eclcluster.getClusterPosition();
          double angularDist = ROOT::Math::VectorUtil::Angle(
                                 eclclusterPos, klmClusterPosition);
          if (angularDist < closestECLAngleDist) {
            closestECLAngleDist = angularDist;
            indexOfClosestCluster = index;
          }
        }
        ++index;
      }
      if (indexOfClosestCluster > -1)
        closestECL = eclClusters[indexOfClosestCluster];
    }
    return std::make_pair(closestECL, closestECLAngleDist);
  }

getPrimaryPDG()

int Belle2::KlongId::getPrimaryPDG

(

Belle2::MCParticle *

part

)

return if mc particles primary pdg.

this is very imprecise but sufficient to understand if the backgrounds are charged, hadronic or gammas which is whats relevant for klid investigations.

Definition at line 151 of file KlId.h.