G4ExcitedStringDecay Class Reference

#include <G4ExcitedStringDecay.hh>

Inheritance diagram for G4ExcitedStringDecay:

Collaboration diagram for G4ExcitedStringDecay:

Public Member Functions
	G4ExcitedStringDecay ()
	G4ExcitedStringDecay (G4VLongitudinalStringDecay *aStringDecay)
virtual	~G4ExcitedStringDecay ()
virtual G4KineticTrackVector *	FragmentStrings (const G4ExcitedStringVector *theStrings)
Public Member Functions inherited from G4VStringFragmentation
	G4VStringFragmentation ()
virtual	~G4VStringFragmentation ()

Detailed Description

Definition at line 38 of file G4ExcitedStringDecay.hh.

Constructor & Destructor Documentation

G4ExcitedStringDecay::G4ExcitedStringDecay

(

)

Definition at line 35 of file G4ExcitedStringDecay.cc.

                                           : G4VStringFragmentation(),theStringDecay(0)
{}

G4ExcitedStringDecay::G4ExcitedStringDecay

(

G4VLongitudinalStringDecay *

aStringDecay

)

Definition at line 38 of file G4ExcitedStringDecay.cc.

: G4VStringFragmentation(),
  theStringDecay(aStringDecay)
{}

G4ExcitedStringDecay::~G4ExcitedStringDecay ( )

virtual

Definition at line 50 of file G4ExcitedStringDecay.cc.

{
}

Member Function Documentation

G4KineticTrackVector * G4ExcitedStringDecay::FragmentStrings ( const G4ExcitedStringVector *  theStrings )

virtual

Implements G4VStringFragmentation.

Definition at line 76 of file G4ExcitedStringDecay.cc.

{
  G4LorentzVector KTsum(0.,0.,0.,0.);

  #ifdef debug_G4ExcitedStringDecay
  G4cout<<G4endl;
  G4cout<<"--------------------------- G4ExcitedStringDecay ----------------------"<<G4endl;
  G4cout<<"Hadronization of Excited Strings: theStrings->size() "<<theStrings->size()<<G4endl;
  #endif

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

  G4LorentzRotation toCms( -1 * KTsum.boostVector() );
  G4LorentzRotation toLab(toCms.inverse());
  G4LorentzVector Ptmp;
  KTsum=G4LorentzVector(0.,0.,0.,0.);
  for ( unsigned int astring=0; astring < theStrings->size(); astring++)
  {
    if ( theStrings->operator[](astring)->IsExcited() ) {
      Ptmp=toCms * theStrings->operator[](astring)->GetLeftParton()->Get4Momentum();
      theStrings->operator[](astring)->GetLeftParton()->Set4Momentum(Ptmp);

      Ptmp=toCms * theStrings->operator[](astring)->GetRightParton()->Get4Momentum();
      theStrings->operator[](astring)->GetRightParton()->Set4Momentum(Ptmp);

      KTsum+= theStrings->operator[](astring)->Get4Momentum();
    } else {
      Ptmp=toCms * theStrings->operator[](astring)->GetKineticTrack()->Get4Momentum();
      theStrings->operator[](astring)->GetKineticTrack()->Set4Momentum(Ptmp);
      KTsum+= theStrings->operator[](astring)->GetKineticTrack()->Get4Momentum();
    }
  }

  G4KineticTrackVector * theResult = new G4KineticTrackVector;
  G4int attempts(0);
  G4bool success=false;
  G4bool NeedEnergyCorrector=false;
  do {
        #ifdef debug_G4ExcitedStringDecay  
        G4cout<<"New try No "<<attempts<<" to hadronize strings"<<G4endl;
        #endif

    std::for_each(theResult->begin() , theResult->end() , DeleteKineticTrack());
    theResult->clear();

    attempts++;

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

    for ( unsigned int astring=0; astring < theStrings->size(); astring++)
    {
          #ifdef debug_G4ExcitedStringDecay  
          G4cout<<"String No "<<astring+1<<" Excited?  "<<theStrings->operator[](astring)->IsExcited()<<G4endl;

          G4cout<<"String No "<<astring+1<<" 4Momentum "<<theStrings->operator[](astring)->Get4Momentum()
                <<" "<<theStrings->operator[](astring)->Get4Momentum().mag()<<G4endl;
          #endif

          G4KineticTrackVector * generatedKineticTracks = NULL;
      if ( theStrings->operator[](astring)->IsExcited() )
      {
             #ifdef debug_G4ExcitedStringDecay  
             G4cout<<"Fragment String with partons: "
                   <<theStrings->operator[](astring)->GetLeftParton()->GetPDGcode() <<" "
                   <<theStrings->operator[](astring)->GetRightParton()->GetPDGcode()<<" "
                   <<"Direction "<<theStrings->operator[](astring)->GetDirection()<<G4endl;
             #endif
         generatedKineticTracks=FragmentString(*theStrings->operator[](astring));
             #ifdef debug_G4ExcitedStringDecay  
             G4cout<<"(G4ExcitedStringDecay) Number of produced hadrons = "<<generatedKineticTracks->size()<<G4endl;
             #endif
      } else {
             #ifdef debug_G4ExcitedStringDecay  
             G4cout<<"   GetTrack from the String"<<G4endl;
             #endif
             G4LorentzVector Mom=theStrings->operator[](astring)->GetKineticTrack()->Get4Momentum();
             G4KineticTrack * aTrack= new G4KineticTrack(
                            theStrings->operator[](astring)->GetKineticTrack()->GetDefinition(),
                            theStrings->operator[](astring)->GetKineticTrack()->GetFormationTime(),
                            G4ThreeVector(0), Mom);

             aTrack->SetPosition(theStrings->operator[](astring)->GetKineticTrack()->GetPosition());

             #ifdef debug_G4ExcitedStringDecay  
             G4cout<<"   A particle stored in the track is "<<aTrack->GetDefinition()->GetParticleName()<<G4endl;
             #endif

         generatedKineticTracks = new G4KineticTrackVector;
         generatedKineticTracks->push_back(aTrack);
      }    

          //if (generatedKineticTracks == NULL)
      if (generatedKineticTracks->size() == 0)
      {
             //G4cerr << "G4VPartonStringModel:No KineticTracks produced" << G4endl;
             //continue;
             success=false; NeedEnergyCorrector=false; break;
      }

          G4LorentzVector KTsum1(0.,0.,0.,0.);
          for ( unsigned int aTrack=0; aTrack<generatedKineticTracks->size();aTrack++)
      {
             #ifdef debug_G4ExcitedStringDecay  
             G4cout<<"Prod part No. "<<aTrack+1<<" "
                   <<(*generatedKineticTracks)[aTrack]->GetDefinition()->GetParticleName()<<" "
                   <<(*generatedKineticTracks)[aTrack]->Get4Momentum()<<G4endl;
             #endif
             theResult->push_back(generatedKineticTracks->operator[](aTrack));
             KTsum1+= (*generatedKineticTracks)[aTrack]->Get4Momentum();
      }
      KTsecondaries+=KTsum1;
    
          #ifdef debug_G4ExcitedStringDecay  
          G4cout << "String secondaries(" <<generatedKineticTracks->size()<< ")"<<G4endl
                 <<"Init  string  momentum: "<< theStrings->operator[](astring)->Get4Momentum()<<G4endl
                 <<"Final hadrons momentum: "<< KTsum1 << G4endl;
          #endif

      if  ( KTsum1.e() > 0 && std::abs((KTsum1.e()-theStrings->operator[](astring)->Get4Momentum().e()) / KTsum1.e()) > perMillion )
      {
        NeedEnergyCorrector=true;
      }

          #ifdef debug_G4ExcitedStringDecay  
          G4cout<<"NeedEnergyCorrection yes/no "<<NeedEnergyCorrector<<G4endl;
          #endif

          // clean up
      delete generatedKineticTracks;
      success=true;
    }

        //success=true;

    if ( NeedEnergyCorrector ) success=EnergyAndMomentumCorrector(theResult, KTsum);
  } while(!success && (attempts < 100));  /* Loop checking, 07.08.2015, A.Ribon */

  for ( unsigned int aTrack=0; aTrack<theResult->size();aTrack++)
  {
    Ptmp=(*theResult)[aTrack]->Get4Momentum();
    Ptmp.transform( toLab);
    (*theResult)[aTrack]->Set4Momentum(Ptmp);
  }

  #ifdef debug_G4ExcitedStringDecay  
  G4cout<<"End of the strings fragmentation (G4ExcitedStringDecay)"<<G4endl;

  G4LorentzVector  KTsum1(0.,0.,0.,0.); 

  for ( unsigned int aTrack=0; aTrack<theResult->size();aTrack++)
  {
      G4cout << " corrected tracks .. " << (*theResult)[aTrack]->GetDefinition()->GetParticleName()
             <<"  " << (*theResult)[aTrack]->Get4Momentum() 
             <<"  " << (*theResult)[aTrack]->Get4Momentum().mag()<< 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;  

  G4cout<<"End of the Hadronization (G4ExcitedStringDecay)"<<G4endl;
  #endif

  for ( unsigned int astring=0; astring < theStrings->size(); astring++)
  {
    if ( theStrings->operator[](astring)->IsExcited() ) {
      Ptmp=theStrings->operator[](astring)->GetLeftParton()->Get4Momentum();
      Ptmp.transform( toLab);
      theStrings->operator[](astring)->GetLeftParton()->Set4Momentum(Ptmp);

      Ptmp=theStrings->operator[](astring)->GetRightParton()->Get4Momentum();
      Ptmp.transform( toLab);
      theStrings->operator[](astring)->GetRightParton()->Set4Momentum(Ptmp);
    } else {
      Ptmp=theStrings->operator[](astring)->GetKineticTrack()->Get4Momentum();
      Ptmp.transform( toLab);
      theStrings->operator[](astring)->GetKineticTrack()->Set4Momentum(Ptmp);
    }
  }

  return theResult;
}

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The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/processes/hadronic/models/parton_string/hadronization/include/G4ExcitedStringDecay.hh
• geant4.10.03.p01/source/processes/hadronic/models/parton_string/hadronization/src/G4ExcitedStringDecay.cc