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This commit is contained in:
Gabriele Cosmo
2016-06-09 16:15:05 +02:00
parent b79225fb37
commit 74cad5e589
3877 changed files with 234205 additions and 167127 deletions
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source/processes/hadronic/models/parton_string/hadronization/src/G4LundStringFragmentation.cc
+36 -9
View File
@@ -24,8 +24,8 @@
// ********************************************************************
//
//
// $Id: G4LundStringFragmentation.cc,v 1.13 2008/06/23 09:17:10 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-02 $ 1.8
// $Id: G4LundStringFragmentation.cc,v 1.18 2009/10/05 12:52:48 vuzhinsk Exp $
// GEANT4 tag $Name: geant4-09-03 $ 1.8
//
// -----------------------------------------------------------------------------
// GEANT 4 class implementation file
@@ -57,7 +57,8 @@ G4LundStringFragmentation::G4LundStringFragmentation()
// ------ smearinr sharp mass cut-off ---------------------------
SmoothParam = 0.2;
SetStringTensionParameter(0.25); // Uzhi 20 June 08
// SetStringTensionParameter(0.25); // Uzhi 20 June 08
SetStringTensionParameter(1.); // Uzhi 20 June 09
}
// --------------------------------------------------------------
@@ -195,7 +196,7 @@ G4cout<<"FragmentString Momentum"<<theString.Get4Momentum()<<theString.Get4Momen
theString.GetPosition().z()+100.*fermi);
LeftVector->operator[](0)->SetPosition(aPosition);
*/
//G4cout<<"Single hadron "<<LeftVector->operator[](0)->GetPosition()<<" "<<LeftVector->operator[](0)->GetFormationTime()<<G4endl;
//G4cout<<"Single hadron "<<LeftVector->operator[](0)->Get4Momentum()<<" "<<LeftVector->operator[](0)->Get4Momentum().mag()<<G4endl;
} else { // 2 hadrons created from qq-qqbar are stored
LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation());
LeftVector->operator[](0)->SetPosition(theString.GetPosition());
@@ -292,7 +293,8 @@ G4cout<<"FragmentString Momentum"<<theString.Get4Momentum()<<theString.Get4Momen
G4double TimeOftheStringCreation=theString.GetTimeOfCreation();
G4ThreeVector PositionOftheStringCreation(theString.GetPosition());
// Uzhi 11.07.09
//G4cout<<" String T Pos"<<TimeOftheStringCreation<<' '<<PositionOftheStringCreation<<G4endl;
/* // For large formation time open *
G4double TimeOftheStringCreation=theString.GetTimeOfCreation()+100*fermi;
G4ThreeVector PositionOftheStringCreation(theString.GetPosition().x(),
@@ -312,6 +314,8 @@ G4cout<<"FragmentString Momentum"<<theString.Get4Momentum()<<theString.Get4Momen
PositionOftheStringCreation=aPosition;
}
*/
//G4cout<<"Lund Frag # hadrons"<<LeftVector->size()<<G4endl; // Uzhi 11.07.09
for(size_t C1 = 0; C1 < LeftVector->size(); C1++)
{
G4KineticTrack* Hadron = LeftVector->operator[](C1);
@@ -321,11 +325,20 @@ G4cout<<"FragmentString Momentum"<<theString.Get4Momentum()<<theString.Get4Momen
G4LorentzVector Coordinate(Hadron->GetPosition(), Hadron->GetFormationTime());
Momentum = toObserverFrame*Coordinate;
Hadron->SetFormationTime(TimeOftheStringCreation+Momentum.e());
Hadron->SetFormationTime(TimeOftheStringCreation+Momentum.e() // Uzhi 11.07.09
-fermi/c_light); // Uzhi 11.07.09
G4ThreeVector aPosition(Momentum.vect());
// Hadron->SetPosition(theString.GetPosition()+aPosition);
Hadron->SetPosition(PositionOftheStringCreation+aPosition);
//G4cout<<"Hadron "<<C1<<" "<<Hadron->GetPosition()/fermi<<" "<<Hadron->GetFormationTime()/fermi<<G4endl;
/* // Uzhi 11.07.09
G4cout<<C1<<' '<<Hadron->GetDefinition()->GetParticleName()<<G4endl;
G4cout<<Hadron->GetDefinition()->GetPDGMass()<<' '
<<Hadron->Get4Momentum()<<G4endl;
G4cout<<Hadron->GetFormationTime()<<' '
<<Hadron->GetPosition()<<' '
<<Hadron->GetPosition().z()/fermi<<G4endl;
*/ // Uzhi
};
//G4cout<<"Out FragmentString"<<G4endl;
@@ -507,8 +520,22 @@ void G4LundStringFragmentation::Sample4Momentum(G4LorentzVector* Mom, G4double M
else
{
do
{
Pt=SampleQuarkPt(); Pt.setZ(0); G4double Pt2=Pt.mag2();
{
// GF 22-May-09, limit sampled pt to allowed range
G4double termD = InitialMass*InitialMass -Mass*Mass - AntiMass*AntiMass;
G4double termab = 4*sqr(Mass*AntiMass);
G4double termN = 2*termD + 4*Mass*Mass + 4*AntiMass*AntiMass;
G4double pt2max=(termD*termD - termab )/ termN ;
// G4cout << " termD, ab, N " << termD << " " << termab << " " << termN
// << " pt2max= " << pt2max ;
Pt=SampleQuarkPt(std::sqrt(pt2max)); Pt.setZ(0); G4double Pt2=Pt.mag2();
// G4cout << " sampled Pt2 = " << Pt2 << " " << pt2max-Pt2 << G4endl;
// end.. GF
//G4cout<<"Sample4Momentum Pt x y "<<Pt.getX()<<" "<<Pt.getY()<<G4endl;
@@ -520,7 +547,7 @@ void G4LundStringFragmentation::Sample4Momentum(G4LorentzVector* Mom, G4double M
AvailablePz2= sqr(InitialMass*InitialMass - MassMt2 - AntiMassMt2) -
4.*MassMt2*AntiMassMt2;
}
while(AvailablePz2 < 0.);
while(AvailablePz2 < 0.); // GF will occur only for numerical precision problem with limit in sampled pt
AvailablePz2 /=(4.*InitialMass*InitialMass);
AvailablePz = std::sqrt(AvailablePz2);