Resonance.h

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//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

// ******************************************************
// 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 INTERNALRESONANCE_H
#define INTERNALRESONANCE_H 1

#include "InternalParticle.h"
#include "Rtypes.h"

namespace DecayTreeFitter {
class FitParams;

class Resonance : public InternalParticle {
 public:
  Resonance(RhoCandidate *bc, const ParticleBase *mother, const Configuration &config);
  virtual ~Resonance();

  virtual int dim() const { return 4; }
  virtual int type() const { return kResonance; }
  inline virtual std::string parname(int index) const;

  inline virtual ErrCode initPar1(FitParams *);
  inline virtual ErrCode initPar2(FitParams *);

  virtual int posIndex() const { return mother()->posIndex(); }
  virtual int momIndex() const { return index(); }
  virtual int lenIndex() const { return -1; }
  virtual bool hasPosition() const { return false; }

 private:
  ClassDef(Resonance, 1)
};

} // namespace DecayTreeFitter

#endif