MissingParticle.cxx

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// ******************************************************
// DecayTreeFitter Package
// We thank the original author Wouter Hulsbergen 
// (BaBar, LHCb) for providing the sources. 
// http://arxiv.org/abs/physics/0503191v1 (2005)
// Adaptation & Development for PANDA: Ralf Kliemt (2015)
// ******************************************************
#include "TLorentzVector.h"
#include "FitParams.h"
#include "MissingParticle.h"
//#include "Event/Particle.h"

using namespace DecayTreeFitter;

ClassImp(MissingParticle);

extern int vtxverbose ;

DecayTreeFitter::MissingParticle::MissingParticle(RhoCandidate* bc, const ParticleBase* aMother)
: ParticleBase(bc,aMother)
{
  // this will be one of the very few particles for which we adjust
  // the dimension if there is a constraint
}

DecayTreeFitter::MissingParticle::~MissingParticle() {}

ErrCode DecayTreeFitter::MissingParticle::initPar1(FitParams* fitpar)
{
  if(vtxverbose>5){std::cout<<"MissingParticle::initPar1: - "<<std::endl;}
  // take them from the bc
  TLorentzVector p4 = particle()->P4() ;
  int momindex = momIndex();
  fitpar->par()(momindex+0) = p4.Px() ;
  fitpar->par()(momindex+1) = p4.Py() ;
  fitpar->par()(momindex+2) = p4.Pz() ;
  if(hasEnergy()) fitpar->par()(momindex+3) = p4.E() ;
  return ErrCode() ;
}

std::string DecayTreeFitter::MissingParticle::parname(int ind) const
{
  return ParticleBase::parname(ind+4) ;
}