MissingParticle.h

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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)
// ******************************************************
#ifndef MISSINGPARTICLE_H
#define MISSINGPARTICLE_H 1
#include "Rtypes.h"

#include "ParticleBase.h"

namespace DecayTreeFitter {

class MissingParticle : public ParticleBase {
 public:
  MissingParticle(RhoCandidate *bc, const ParticleBase *mother);
  virtual ~MissingParticle();

  virtual ErrCode initPar1(FitParams *);
  virtual ErrCode initPar2(FitParams *) { return ErrCode::success; }

  virtual std::string parname(int index) const;
  virtual int dim() const { return hasMassConstraint() ? 3 : 4; }
  virtual int momIndex() const { return index(); }
  virtual bool hasEnergy() const { return hasMassConstraint() ? false : true; }
  virtual int type() const { return kMissingParticle; }
  virtual void addToConstraintList(constraintlist & /*alist*/, int /*depth*/) const {}
  ClassDef(MissingParticle, 1)
};

} // namespace DecayTreeFitter
#endif