source: trunk/source/processes/hadronic/models/parton_string/hadronization/include/G4ExcitedStringDecay.hh @ 1337

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// $Id: G4ExcitedStringDecay.hh,v 1.12 2010/06/21 17:50:48 vuzhinsk Exp $
// GEANT4 tag $Name: geant4-09-04-beta-01 $
//
#ifndef G4ExcitedStringDecay_h
#define G4ExcitedStringDecay_h 1

#include "globals.hh"
#include "G4VStringFragmentation.hh"
#include "G4ExcitedStringVector.hh"
#include "G4KineticTrackVector.hh"
#include "G4LundStringFragmentation.hh"

class G4ExcitedStringDecay: public G4VStringFragmentation 
{
  public:
      G4ExcitedStringDecay();
      G4ExcitedStringDecay(G4VLongitudinalStringDecay * aStringDecay);
      ~G4ExcitedStringDecay();

  private:
      G4ExcitedStringDecay(const G4ExcitedStringDecay &right);
      const G4ExcitedStringDecay & operator=(const G4ExcitedStringDecay &right);
      int operator==(const G4ExcitedStringDecay &right) const;
      int operator!=(const G4ExcitedStringDecay &right) const;

  public:

      virtual G4KineticTrackVector * FragmentStrings(const G4ExcitedStringVector * theStrings);

  private:
      G4KineticTrackVector * FragmentString(const G4ExcitedString &theString);
      G4bool EnergyAndMomentumCorrector(G4KineticTrackVector* Output, G4LorentzVector& TotalCollisionMom);   
  
      G4VLongitudinalStringDecay * theStringDecay;

};

inline
G4KineticTrackVector *G4ExcitedStringDecay::
FragmentString(const G4ExcitedString &theString)
{
        if ( theStringDecay == NULL ) 
            theStringDecay=new G4LundStringFragmentation();
            
        return theStringDecay->FragmentString(theString);
}
        

inline
G4KineticTrackVector *G4ExcitedStringDecay::
FragmentStrings(const G4ExcitedStringVector * theStrings)
{
  G4KineticTrackVector * theResult = new G4KineticTrackVector;

  G4LorentzVector KTsum(0.,0.,0.,0.);
  G4LorentzVector KTsecondaries(0.,0.,0.,0.);
  G4bool NeedEnergyCorrector=false;

  for ( unsigned int astring=0; astring < theStrings->size(); astring++)
  {
        KTsum+= theStrings->operator[](astring)->Get4Momentum();

        if( !(KTsum.e()<1) && !(KTsum.e()>-1) )
        {
          throw G4HadronicException(__FILE__, __LINE__, 
                                   "G4ExcitedStringDecay::FragmentStrings received nan string...");
        }
        G4KineticTrackVector * generatedKineticTracks = NULL;
  
        if ( theStrings->operator[](astring)->IsExcited() )
        {
             generatedKineticTracks=FragmentString(*theStrings->operator[](astring));
        } else {
             generatedKineticTracks = new G4KineticTrackVector;
             generatedKineticTracks->push_back(theStrings->operator[](astring)->GetKineticTrack());
        }    

        if (generatedKineticTracks == NULL) 
        {
                G4cerr << "G4VPartonStringModel:No KineticTracks produced" << G4endl;
                continue;
        }

        G4LorentzVector KTsum1(0.,0.,0.,0.);
        for ( unsigned int aTrack=0; aTrack<generatedKineticTracks->size();aTrack++)
        {
                theResult->push_back(generatedKineticTracks->operator[](aTrack));
                KTsum1+= (*generatedKineticTracks)[aTrack]->Get4Momentum();
        }
        KTsecondaries+=KTsum1;
        
        if  ( KTsum1.e() > 0 && std::abs((KTsum1.e()-theStrings->operator[](astring)->Get4Momentum().e()) / KTsum1.e()) > perMillion ) 
        {
//--debug--           G4cout << "String secondaries(" <<generatedKineticTracks->size()<< ")  momentum: " 
//--debug--               << theStrings->operator[](astring)->Get4Momentum() << " " << KTsum1 << G4endl;
           NeedEnergyCorrector=true;
        }

//      clean up
        delete generatedKineticTracks;
  }
//--DEBUG  G4cout << "Strings/secs total  4 momentum " << KTsum << " " <<KTsecondaries << G4endl;

  G4bool success=true;
  if ( NeedEnergyCorrector ) success=EnergyAndMomentumCorrector(theResult, KTsum);


#ifdef debug_ExcitedStringDecay
  G4LorentzVector  KTsum1=0;
  for ( unsigned int aTrack=0; aTrack<theResult->size();aTrack++)
  {
      G4cout << " corrected tracks .. " << (*theResult)[aTrack]->GetDefinition()->GetParticleName()
      <<"  " << (*theResult)[aTrack]->Get4Momentum() << G4endl;
      KTsum1+= (*theResult)[aTrack]->Get4Momentum();
  }
  G4cout << "Needcorrector/success " << NeedEnergyCorrector << "/" << success << ", Corrected total  4 momentum " << KTsum1  << G4endl;
  if ( ! success ) G4cout << "failed to correct E/p" << G4endl;  
#endif

  return theResult;
}

#endif