Import Geant4 10.5.0.beta source tree
This commit is contained in:
Gabriele Cosmo
+213
-130
@@ -24,7 +24,7 @@
|
||||
// ********************************************************************
|
||||
//
|
||||
//
|
||||
// $Id: G4SingleDiffractiveExcitation.cc 106980 2017-10-31 09:02:49Z gcosmo $
|
||||
// $Id: G4SingleDiffractiveExcitation.cc 108191 2018-01-18 16:10:21Z gcosmo $
|
||||
// ------------------------------------------------------------
|
||||
// GEANT 4 class implemetation file
|
||||
//
|
||||
@@ -47,184 +47,267 @@
|
||||
#include "G4ExcitedString.hh"
|
||||
|
||||
#include "G4Log.hh"
|
||||
#include "G4Pow.hh"
|
||||
|
||||
//#define debugSingleDiffraction
|
||||
|
||||
G4SingleDiffractiveExcitation::G4SingleDiffractiveExcitation(G4double sigmaPt, G4double minextraMass,G4double x0mass)
|
||||
: widthOfPtSquare(-2*sqr(sigmaPt)) , minExtraMass(minextraMass), minmass(x0mass)
|
||||
{}
|
||||
G4SingleDiffractiveExcitation::G4SingleDiffractiveExcitation(){}
|
||||
|
||||
G4SingleDiffractiveExcitation::~G4SingleDiffractiveExcitation()
|
||||
{}
|
||||
G4SingleDiffractiveExcitation::~G4SingleDiffractiveExcitation(){}
|
||||
|
||||
G4bool G4SingleDiffractiveExcitation::
|
||||
ExciteParticipants(G4VSplitableHadron *projectile, G4VSplitableHadron *target) const
|
||||
ExciteParticipants(G4VSplitableHadron *projectile, G4VSplitableHadron *target, G4bool ProjectileDiffraction) const
|
||||
{
|
||||
G4LorentzVector Pprojectile=projectile->Get4Momentum();
|
||||
G4double Mprojectile2=sqr(projectile->GetDefinition()->GetPDGMass() + minExtraMass);
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout<<G4endl<<"G4SingleDiffractiveExcitation::ExciteParticipants"<<G4endl;
|
||||
#endif
|
||||
|
||||
G4LorentzVector Ptarget=target->Get4Momentum();
|
||||
G4double Mtarget2=sqr(target->GetDefinition()->GetPDGMass() + minExtraMass);
|
||||
//G4cout << "E proj, target :" << Pprojectile.e() << ", " << Ptarget.e() << G4endl;
|
||||
G4LorentzVector Pprojectile=projectile->Get4Momentum();
|
||||
G4double Mprojectile = projectile->GetDefinition()->GetPDGMass();
|
||||
G4double Mprojectile2=sqr(projectile->GetDefinition()->GetPDGMass());
|
||||
|
||||
G4bool KeepProjectile= G4UniformRand() > 0.5;
|
||||
G4LorentzVector Ptarget=target->Get4Momentum();
|
||||
G4double Mtarget = target->GetDefinition()->GetPDGMass();
|
||||
G4double Mtarget2=sqr(target->GetDefinition()->GetPDGMass());
|
||||
|
||||
// reset the min.mass of the non diffractive particle to its value, ( minus a bit for rounding...)
|
||||
if ( KeepProjectile )
|
||||
{
|
||||
//cout << " Projectile fix" << G4endl;
|
||||
Mprojectile2 = sqr(projectile->GetDefinition()->GetPDGMass() * (1-perCent) );
|
||||
} else {
|
||||
//cout << " Target fix" << G4endl;
|
||||
Mtarget2=sqr(target->GetDefinition()->GetPDGMass() * (1-perCent) );
|
||||
}
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout<<"Proj Targ "<<projectile->GetDefinition()->GetPDGEncoding()<<" "<<target->GetDefinition()->GetPDGEncoding()<<G4endl;
|
||||
G4cout<<"Pr Tr 4-Mom "<<Pprojectile<<" "<<Pprojectile.mag()<<G4endl
|
||||
<<" "<<Ptarget <<" "<<Ptarget.mag() <<G4endl;
|
||||
#endif
|
||||
|
||||
// Transform momenta to cms and then rotate parallel to z axis;
|
||||
G4LorentzVector Psum=Pprojectile+Ptarget;
|
||||
G4double SqrtS=Psum.mag();
|
||||
G4double S =Psum.mag2();
|
||||
|
||||
G4LorentzVector Psum;
|
||||
Psum=Pprojectile+Ptarget;
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout<<"SqrtS-Mprojectile-Mtarget "<<SqrtS<<" "<<Mprojectile<<" "<<Mtarget
|
||||
<<" "<<SqrtS-Mprojectile-Mtarget<<G4endl;
|
||||
#endif
|
||||
if(SqrtS-Mprojectile-Mtarget <= 250.0*MeV) {
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cerr<<"Projectile: "<<projectile->GetDefinition()->GetPDGEncoding()<<" "
|
||||
<<Pprojectile<<" "<<Pprojectile.mag()<<G4endl;
|
||||
G4cerr<<"Target: "<<target->GetDefinition()->GetPDGEncoding()<<" "
|
||||
<<Ptarget<<" "<<Ptarget.mag()<<G4endl;
|
||||
G4cerr<<"sqrt(S) = "<<SqrtS<<" Mp + Mt = "<<Pprojectile.mag()+Ptarget.mag()<<G4endl;
|
||||
#endif
|
||||
return true;
|
||||
}
|
||||
|
||||
G4LorentzRotation toCms(-1*Psum.boostVector());
|
||||
G4LorentzRotation toCms(-1*Psum.boostVector());
|
||||
|
||||
G4LorentzVector Ptmp=toCms*Pprojectile;
|
||||
G4LorentzVector Ptmp=toCms*Pprojectile;
|
||||
|
||||
if ( Ptmp.pz() <= 0. )
|
||||
{
|
||||
// "String" moving backwards in CMS, abort collision !!
|
||||
//G4cout << " abort Collision!! " << G4endl;
|
||||
return false;
|
||||
}
|
||||
if ( Ptmp.pz() <= 0. )
|
||||
{
|
||||
// "String" moving backwards in CMS, abort collision !!
|
||||
// G4cout << " abort Collision!! " << G4endl;
|
||||
return false;
|
||||
}
|
||||
|
||||
toCms.rotateZ(-1*Ptmp.phi());
|
||||
toCms.rotateY(-1*Ptmp.theta());
|
||||
toCms.rotateZ(-1*Ptmp.phi());
|
||||
toCms.rotateY(-1*Ptmp.theta());
|
||||
|
||||
//G4cout << "Pprojectile be4 boost " << Pprojectile << G4endl;
|
||||
//G4cout << "Ptarget be4 boost : " << Ptarget << G4endl;
|
||||
G4LorentzRotation toLab(toCms.inverse());
|
||||
|
||||
G4LorentzRotation toLab(toCms.inverse());
|
||||
Pprojectile.transform(toCms);
|
||||
Ptarget.transform(toCms);
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout << "Pprojectile in CMS " << Pprojectile << G4endl;
|
||||
G4cout << "Ptarget in CMS " << Ptarget << G4endl;
|
||||
#endif
|
||||
G4double maxPtSquare=sqr(Ptarget.pz());
|
||||
|
||||
Pprojectile.transform(toCms);
|
||||
Ptarget.transform(toCms);
|
||||
//----------------------- Uzhi Oct. 2016 Start
|
||||
G4double ProjectileMinDiffrMass(0.), TargetMinDiffrMass(0.);
|
||||
G4double AveragePt2(0.);
|
||||
G4int absPDGcode=std::abs(projectile->GetDefinition()->GetPDGEncoding());
|
||||
|
||||
G4LorentzVector Qmomentum;
|
||||
G4int whilecount=0;
|
||||
do {
|
||||
// Generate pt
|
||||
if ( ProjectileDiffraction ) {
|
||||
if( absPDGcode > 1000 ) //------Projectile is baryon --------
|
||||
{
|
||||
ProjectileMinDiffrMass = 1.16; // GeV
|
||||
AveragePt2 = 0.3; // GeV^2
|
||||
}
|
||||
else if( absPDGcode == 211 || absPDGcode == 111) //------Projectile is Pion -----------
|
||||
{
|
||||
ProjectileMinDiffrMass = 1.0; // GeV
|
||||
AveragePt2 = 0.3; // GeV^2
|
||||
}
|
||||
else if( absPDGcode == 321 || absPDGcode == 130 || absPDGcode == 310) //Projectile is Kaon
|
||||
{
|
||||
ProjectileMinDiffrMass = 1.1; // GeV
|
||||
AveragePt2 = 0.3; // GeV^2
|
||||
}
|
||||
else if( absPDGcode == 22) //------Projectile is Gamma -----------
|
||||
{
|
||||
ProjectileMinDiffrMass = 0.25; // GeV
|
||||
AveragePt2 = 0.36; // GeV^2
|
||||
}
|
||||
else //------Projectile is undefined, Nucleon assumed
|
||||
{
|
||||
ProjectileMinDiffrMass = 1.1; // GeV
|
||||
AveragePt2 = 0.3; // GeV^2
|
||||
};
|
||||
|
||||
G4double maxPtSquare=sqr(Ptarget.pz());
|
||||
if (whilecount++ >= 500 && (whilecount%100)==0)
|
||||
//G4cout << "G4SingleDiffractiveExcitation::ExciteParticipants possibly looping"
|
||||
// << ", loop count/ maxPtSquare : "
|
||||
// << whilecount << " / " << maxPtSquare << G4endl;
|
||||
ProjectileMinDiffrMass = ProjectileMinDiffrMass * GeV;
|
||||
Mprojectile2=sqr(ProjectileMinDiffrMass);
|
||||
}
|
||||
else
|
||||
{
|
||||
TargetMinDiffrMass = 1.16*GeV; // For target nucleon
|
||||
Mtarget2 = sqr( TargetMinDiffrMass) ;
|
||||
AveragePt2 = 0.3; // GeV^2
|
||||
} // end of if ( ProjectileDiffraction )
|
||||
|
||||
if (whilecount > 1000 )
|
||||
{
|
||||
Qmomentum=G4LorentzVector(0.,0.,0.,0.);
|
||||
//G4cout << "G4SingleDiffractiveExcitation::ExciteParticipants: Aborting loop!" << G4endl;
|
||||
return false; // Ignore this interaction
|
||||
}
|
||||
Qmomentum=G4LorentzVector(GaussianPt(widthOfPtSquare,maxPtSquare),0);
|
||||
AveragePt2 = AveragePt2 * GeV*GeV; // Uzhi 6 Oct. 2016
|
||||
//----------------------- Uzhi Oct. 2016 End
|
||||
|
||||
// Momentum transfer
|
||||
G4double Xmin = minmass / ( Pprojectile.e() + Ptarget.e() );
|
||||
G4double Xmax=1.;
|
||||
G4double Xplus =ChooseX(Xmin,Xmax);
|
||||
G4double Xminus=ChooseX(Xmin,Xmax);
|
||||
G4double Pt2, PZcms, PZcms2;
|
||||
G4double ProjMassT2, ProjMassT;
|
||||
G4double TargMassT2, TargMassT;
|
||||
G4double PMinusMin, PMinusMax;
|
||||
//G4double PPlusMin , PPlusMax;
|
||||
G4double TPlusMin, TPlusMax;
|
||||
G4double PMinusNew, PPlusNew, TPlusNew, TMinusNew;
|
||||
|
||||
G4double pt2=G4ThreeVector(Qmomentum.vect()).mag2();
|
||||
G4double Qplus =-1 * pt2 / Xminus/Ptarget.minus();
|
||||
G4double Qminus= pt2 / Xplus /Pprojectile.plus();
|
||||
G4LorentzVector Qmomentum;
|
||||
G4double Qminus, Qplus;
|
||||
|
||||
if ( KeepProjectile )
|
||||
{
|
||||
Qminus = (sqr(projectile->GetDefinition()->GetPDGMass()) + pt2 )
|
||||
/ (Pprojectile.plus() + Qplus ) - Pprojectile.minus();
|
||||
} else {
|
||||
Qplus = Ptarget.plus() - (sqr(target->GetDefinition()->GetPDGMass()) + pt2 )
|
||||
/ (Ptarget.minus() - Qminus );
|
||||
}
|
||||
G4int whilecount=0;
|
||||
do {
|
||||
whilecount++;
|
||||
|
||||
Qmomentum.setPz( (Qplus-Qminus)/2 );
|
||||
Qmomentum.setE( (Qplus+Qminus)/2 );
|
||||
if (whilecount > 1000 )
|
||||
{
|
||||
Qmomentum=G4LorentzVector(0.,0.,0.,0.);
|
||||
return false; // Ignore this interaction
|
||||
}
|
||||
|
||||
// Generate pt
|
||||
Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0);
|
||||
|
||||
//G4cout << "Qplus / Qminus " << Qplus << " / " << Qminus<<G4endl;
|
||||
//G4cout << "pt2 " << pt2 << G4endl;
|
||||
//G4cout << "Qmomentum " << Qmomentum << G4endl;
|
||||
//G4cout << " Masses (P/T) : " << (Pprojectile+Qmomentum).mag() <<
|
||||
// " / " << (Ptarget-Qmomentum).mag() << G4endl;
|
||||
Pt2 = G4ThreeVector( Qmomentum.vect() ).mag2();
|
||||
|
||||
} while ( (Ptarget-Qmomentum).mag2() <= Mtarget2 /* Loop checking, 26.10.2015, A.Ribon */
|
||||
|| (Pprojectile+Qmomentum).mag2() <= Mprojectile2
|
||||
|| (Ptarget-Qmomentum).e() < 0.
|
||||
|| (Pprojectile+Qmomentum).e() < 0. );
|
||||
ProjMassT2 = Mprojectile2 + Pt2;
|
||||
ProjMassT = std::sqrt( ProjMassT2 );
|
||||
TargMassT2 = Mtarget2 + Pt2;
|
||||
TargMassT = std::sqrt( TargMassT2 );
|
||||
|
||||
//G4double Ecms=Pprojectile.e() + Ptarget.e();
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout<<whilecount<<" "<<Pt2<<" "<<ProjMassT<<" "<<TargMassT<<" "<<SqrtS<<" "<<S<<" "<<ProjectileDiffraction<<G4endl;
|
||||
#endif
|
||||
if ( SqrtS < ProjMassT + TargMassT ) continue;
|
||||
|
||||
Pprojectile += Qmomentum;
|
||||
Ptarget -= Qmomentum;
|
||||
PZcms2 = ( S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2
|
||||
- 2.0*S*ProjMassT2 - 2.0*S*TargMassT2 - 2.0*ProjMassT2*TargMassT2 ) / 4.0 / S;
|
||||
|
||||
//G4cout << "Pprojectile.e() : " << Pprojectile.e() << G4endl;
|
||||
//G4cout << "Ptarget.e() : " << Ptarget.e() << G4endl;
|
||||
//G4cout << "end event_______________________________________________"<<G4endl;
|
||||
//G4cout << "Pprojectile with Q : " << Pprojectile << G4endl;
|
||||
//G4cout << "Ptarget with Q : " << Ptarget << G4endl;
|
||||
//G4cout << "Projectile back: " << toLab * Pprojectile << G4endl;
|
||||
//G4cout << "Target back: " << toLab * Ptarget << G4endl;
|
||||
if ( PZcms2 < 0 ) continue;
|
||||
|
||||
// Transform back and update SplitableHadron Participant.
|
||||
Pprojectile.transform(toLab);
|
||||
Ptarget.transform(toLab);
|
||||
PZcms = std::sqrt( PZcms2 );
|
||||
|
||||
//G4cout << "G4SingleDiffractiveExcitation- Target mass " << Ptarget.mag() << G4endl;
|
||||
//G4cout << "G4SingleDiffractiveExcitation- Projectile mass " << Pprojectile.mag() << G4endl;
|
||||
if ( ProjectileDiffraction )
|
||||
{ // The projectile will fragment, the target will saved.
|
||||
PMinusMin = std::sqrt( ProjMassT2 + PZcms2 ) - PZcms;
|
||||
PMinusMax = SqrtS - TargMassT;
|
||||
|
||||
target->Set4Momentum(Ptarget);
|
||||
projectile->Set4Momentum(Pprojectile);
|
||||
PMinusNew = ChooseX( PMinusMin, PMinusMax );
|
||||
TMinusNew = SqrtS - PMinusNew;
|
||||
|
||||
return true;
|
||||
Qminus = Ptarget.minus() - TMinusNew;
|
||||
TPlusNew = TargMassT2 / TMinusNew;
|
||||
Qplus = Ptarget.plus() - TPlusNew;
|
||||
|
||||
} else {// The target will fragment, the projectile will saved.
|
||||
TPlusMin = std::sqrt( TargMassT2 + PZcms2 ) - PZcms;
|
||||
TPlusMax = SqrtS - ProjMassT;
|
||||
|
||||
TPlusNew = ChooseX( TPlusMin, TPlusMax ); // TPlusMax; //
|
||||
PPlusNew = SqrtS - TPlusNew;
|
||||
|
||||
Qplus = PPlusNew - Pprojectile.plus();
|
||||
PMinusNew = ProjMassT2 / PPlusNew;
|
||||
Qminus = PMinusNew - Pprojectile.minus();
|
||||
}
|
||||
|
||||
|
||||
Qmomentum.setPz( (Qplus - Qminus)/2 );
|
||||
Qmomentum.setE( (Qplus + Qminus)/2 );
|
||||
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout<<ProjectileDiffraction<<" "<<( Pprojectile + Qmomentum ).mag2()<<" "<< Mprojectile2<<G4endl;
|
||||
G4cout<<!ProjectileDiffraction<<" "<<( Ptarget - Qmomentum ).mag2()<<" "<< Mtarget2<<G4endl;
|
||||
#endif
|
||||
|
||||
} while ( ( ProjectileDiffraction&&( Pprojectile + Qmomentum ).mag2() < Mprojectile2 ) ||
|
||||
(!ProjectileDiffraction&&( Ptarget - Qmomentum ).mag2() < Mtarget2 ) );
|
||||
// Repeat the sampling because there was not any excitation
|
||||
|
||||
|
||||
Pprojectile += Qmomentum;
|
||||
|
||||
Ptarget -= Qmomentum;
|
||||
|
||||
// Transform back and update SplitableHadron Participant.
|
||||
Pprojectile.transform(toLab);
|
||||
Ptarget.transform(toLab);
|
||||
|
||||
#ifdef debugSingleDiffraction
|
||||
G4cout << "Pprojectile in Lab. " << Pprojectile << G4endl;
|
||||
G4cout << "Ptarget in Lab. " << Ptarget << G4endl;
|
||||
G4cout << "G4SingleDiffractiveExcitation- Projectile mass " << Pprojectile.mag() << G4endl;
|
||||
G4cout << "G4SingleDiffractiveExcitation- Target mass " << Ptarget.mag() << G4endl;
|
||||
#endif
|
||||
|
||||
//G4int Uzhi; G4cin>>Uzhi;
|
||||
|
||||
target->Set4Momentum(Ptarget);
|
||||
projectile->Set4Momentum(Pprojectile);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
// --------- private methods ----------------------
|
||||
|
||||
G4double G4SingleDiffractiveExcitation::ChooseX(G4double Xmin, G4double Xmax) const
|
||||
{
|
||||
// choose an x between Xmin and Xmax with P(x) ~ 1/x
|
||||
// to be improved...
|
||||
// choose an x between Xmin and Xmax with P(x) ~ 1/x
|
||||
G4double range=Xmax-Xmin;
|
||||
|
||||
G4double range=Xmax-Xmin;
|
||||
if ( Xmin <= 0. || range <=0. )
|
||||
{
|
||||
G4cout << " Xmin, range : " << Xmin << " , " << range << G4endl;
|
||||
throw G4HadronicException(__FILE__, __LINE__, "G4SingleDiffractiveExcitation::ChooseX : Invalid arguments ");
|
||||
}
|
||||
|
||||
if ( Xmin <= 0. || range <=0. )
|
||||
{
|
||||
G4cout << " Xmin, range : " << Xmin << " , " << range << G4endl;
|
||||
throw G4HadronicException(__FILE__, __LINE__, "G4SingleDiffractiveExcitation::ChooseX : Invalid arguments ");
|
||||
}
|
||||
|
||||
G4double x;
|
||||
do {
|
||||
x=Xmin + G4UniformRand() * range;
|
||||
} while ( Xmin/x < G4UniformRand() ); /* Loop checking, 26.10.2015, A.Ribon */
|
||||
|
||||
//cout << "DiffractiveX "<<x<<G4endl;
|
||||
return x;
|
||||
G4double x = Xmin*G4Pow::GetInstance()->powA(Xmax/Xmin, G4UniformRand() );
|
||||
// G4double x = 1.0/sqr(1.0/std::sqrt(Xmin) - G4UniformRand() * (1.0/std::sqrt(Xmin) - 1.0/std::sqrt(Xmax)));
|
||||
return x;
|
||||
}
|
||||
|
||||
G4ThreeVector G4SingleDiffractiveExcitation::GaussianPt(G4double widthSquare, G4double maxPtSquare) const
|
||||
{
|
||||
// @@ this method is used in FTFModel as well. Should go somewhere common!
|
||||
{ // @@ this method is used in FTFModel as well. Should go somewhere common!
|
||||
|
||||
G4double pt2;
|
||||
G4double pt2;
|
||||
|
||||
const G4int maxNumberOfLoops = 1000;
|
||||
G4int loopCounter = -1;
|
||||
do {
|
||||
pt2=widthSquare * G4Log( G4UniformRand() );
|
||||
} while ( ( pt2 > maxPtSquare) && ++loopCounter < maxNumberOfLoops ); /* Loop checking, 26.10.2015, A.Ribon */
|
||||
if ( loopCounter >= maxNumberOfLoops ) pt2 = 0.0;
|
||||
const G4int maxNumberOfLoops = 1000;
|
||||
G4int loopCounter = 0;
|
||||
do {
|
||||
pt2=-widthSquare * G4Log( G4UniformRand() );
|
||||
} while ( ( pt2 > maxPtSquare) && ++loopCounter < maxNumberOfLoops ); /* Loop checking, 07.08.2015, A.Ribon */
|
||||
if ( loopCounter >= maxNumberOfLoops ) {
|
||||
pt2 = 0.99*maxPtSquare; // Just an acceptable value, without any physics consideration.
|
||||
}
|
||||
|
||||
pt2=std::sqrt(pt2);
|
||||
pt2=std::sqrt(pt2);
|
||||
|
||||
G4double phi=G4UniformRand() * twopi;
|
||||
G4double phi=G4UniformRand() * twopi;
|
||||
|
||||
return G4ThreeVector (pt2*std::cos(phi), pt2*std::sin(phi), 0.);
|
||||
return G4ThreeVector (pt2*std::cos(phi), pt2*std::sin(phi), 0.);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user