Rho4CFitter.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".              *
//****************************************************************************

#ifndef Rho4CFitter_H
#define Rho4CFitter_H
//                                                                      //
// Rho4CFitter                  //
//                                                                      //
// Author: K. Goetzen, GSI, 2008                //
//                                                                      //

#include "RhoFitterBase.h"
#include "TVector3.h"
#include "TMatrixDSym.h"
#include "TMatrixD.h"
#include "TLorentzVector.h"
#include "RhoCandList.h"

class RhoCandidate;

class Rho4CFitter : public RhoFitterBase {
 public:
  Rho4CFitter(RhoCandidate *b, TLorentzVector lv);
  virtual ~Rho4CFitter();     // {if(fHeadOfTree) delete fHeadOfTree;}
  Bool_t Fit();               // fits final state particles to initial state, States inbetween are modified.
  Bool_t FitConserveMasses(); // fits final state particles threemomenta to initial state, States inbetween are modified.
  Bool_t FitAll()
  {
    Fatal("Rho4CFitter::FitAll()", "Not applicable. Please use Fit() or FitConserveMasses().");
    return kFALSE;
  };
  void PrintTree(RhoCandidate *c, int l = 0);
  double Chi2Contribution(const RhoCandidate &) const
  {
    Error("Rho4CFitter::Chi2Contribution", "No chi2 contribution available.");
    return -9999.;
  };

 private:
  Bool_t Do4CFit();                     // Fit, can freely change energy
  Bool_t Do4CFitWithMassConservation(); // Fit, conserving daughter masses

  TLorentzVector fLv4C;
  int fNDau;
  double fConserveDaughterMasses; // true = energy of daughters cannot be modified by fit

  ClassDef(Rho4CFitter, 1) // A 4c fitter
};

#endif