RecoTrack.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 RECOTRACK_H
#define RECOTRACK_H 1

//#include "GaudiKernel/Vector3DTypes.h"
#include "RecoParticle.h"
#include "Configuration.h"
#include "TVector3.h"
#include "LineTool.h"
#include "State.h"
#include "Rtypes.h"

//#include "PndTrack.h"
#include "RecoTrackStateProvider.h"

// class ITrackStateProvider ;
// namespace LHCb {
//  class TrackTraj ;
//}
//
namespace DecayTreeFitter {

class RecoTrack : public RecoParticle {
 public:
  RecoTrack(RhoCandidate *bc, const ParticleBase *mother, const Configuration &config);
  virtual ~RecoTrack(){};

  virtual ErrCode initPar2(FitParams *);
  virtual ErrCode initCov(FitParams *);
  virtual int dimM() const { return 5; }
  virtual int type() const { return kRecoTrack; }

  virtual ErrCode projectRecoConstraint(const FitParams *, Projection &) const;
  ErrCode updCache(const FitParams *fitparams); //[R.K.'14] not't cache right now
  // static void setApplyCovCorrection(bool b=true) { gApplyCovCorrection = b ; }
  // static void correctCov(HepSymMatrix& V) ;

  virtual int nFinalChargedCandidates() const { return 1; }

  virtual void addToConstraintList(constraintlist &alist, int depth) const { alist.push_back(Constraint(this, Constraint::track, depth, dimM())); }
  // ErrCode updFltToMother(const FitParams* fitparams) ;
  void setFlightLength(double flt) { m_flt = flt; }
  //    const PndTrack& track() const { return *m_track ; }
  // FIXME state needed?
  const DecayTreeFitter::State &state() const { return m_state; }
  const DecayTreeFitter::State &closestCachedState(double z);

 private:
  const TVector3 m_bfield;
  const RhoCandidate *m_candidate;
  //    const PndTrack* m_track ;
  const RecoTrackStateProvider *m_stateprovider;
  bool m_useTrackTraj;
  //    const LHCb::TrackTraj* m_tracktraj ;
  bool m_cached;
  double m_flt;
  DecayTreeFitter::State m_state;
  std::vector<DecayTreeFitter::State> m_StateCache;
  //    double m_bremEnergy ;
  //    double m_bremEnergyCov ;
  ClassDef(RecoTrack, 1)
};

} // namespace DecayTreeFitter
#endif