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G4INCLNKToNKChannel.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4INCLNKToNKChannel.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// INCL++ intra-nuclear cascade model
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// Alain Boudard, CEA-Saclay, France
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// Joseph Cugnon, University of Liege, Belgium
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// Jean-Christophe David, CEA-Saclay, France
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// Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
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// Sylvie Leray, CEA-Saclay, France
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// Davide Mancusi, CEA-Saclay, France
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//
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#define INCLXX_IN_GEANT4_MODE 1
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#include "
globals.hh
"
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#include "
G4INCLNKToNKChannel.hh
"
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#include "
G4INCLKinematicsUtils.hh
"
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#include "
G4INCLBinaryCollisionAvatar.hh
"
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#include "
G4INCLRandom.hh
"
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#include "
G4INCLGlobals.hh
"
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#include "
G4INCLLogger.hh
"
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#include <algorithm>
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#include "
G4INCLPhaseSpaceGenerator.hh
"
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namespace
G4INCL {
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NKToNKChannel::NKToNKChannel
(
Particle
*p1,
Particle
*p2)
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: particle1(p1), particle2(p2)
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{}
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NKToNKChannel::~NKToNKChannel
(){}
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void
NKToNKChannel::fillFinalState
(
FinalState
*
fs
) {
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Particle
*
nucleon
;
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Particle
*kaon;
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if
(
particle1
->
isNucleon
()){
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nucleon =
particle1
;
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kaon =
particle2
;
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}
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else
{
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nucleon =
particle2
;
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kaon =
particle1
;
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}
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// assert(ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType()) == 0);
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if
(kaon->
getType
() ==
KZero
){
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nucleon->
setType
(
Neutron
);
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kaon->
setType
(
KPlus
);
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}
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else
{
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nucleon->
setType
(
Proton
);
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kaon->
setType
(
KZero
);
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}
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ThreeVector
mom_kaon;
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// const G4double pLab = KinematicsUtils::momentumInLab(kaon,nucleon);
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/* if(pLab==0) mom_kaon = Random::normVector();
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else{
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const G4double x = kaon->getMomentum().getX();
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const G4double y = kaon->getMomentum().getY();
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const G4double z = kaon->getMomentum().getZ();
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const G4double r = std::sqrt(x*x+y*y+z*z);
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const G4double rho = std::sqrt(x*x+y*y);
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const G4double b = 12. * pLab/2375.; // correspond to the forward slope description at 2375 MeV/c in K- p elastic
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const G4double cos_theta = std::log(Random::shoot()*(std::exp(b)-std::exp(-b))+std::exp(-b))/b;
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const G4double sin_theta = std::sqrt(1-cos_theta*cos_theta);
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const G4double cos_phi = std::cos(Random::shoot()*Math::twoPi);
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const G4double sin_phi = std::sqrt(1-cos_phi*cos_phi);
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if(rho == 0) mom_kaon = ThreeVector(sin_theta*cos_phi,sin_theta*sin_phi,cos_theta);
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// Rotation in the direction of the incident kaon
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const G4double px = x/r*cos_theta - y/rho*sin_theta*cos_phi + z/r*x/rho*sin_theta*sin_phi;
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const G4double py = y/r*cos_theta + x/rho*sin_theta*cos_phi + z/r*y/rho*sin_theta*sin_phi;
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const G4double pz = z/r*cos_theta - rho/r*sin_theta*sin_phi;
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mom_kaon = ThreeVector(px,py,pz);
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}*/
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mom_kaon =
Random::normVector
();
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G4double
norm
=
KinematicsUtils::momentumInCM
(kaon,nucleon);
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kaon->
setMomentum
(mom_kaon*norm);
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nucleon->
setMomentum
(-mom_kaon*norm);
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kaon->
adjustEnergyFromMomentum
();
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nucleon->
adjustEnergyFromMomentum
();
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fs->
addModifiedParticle
(nucleon);
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fs->
addModifiedParticle
(kaon);
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}
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}
geant4
tree
geant4-10.6-release
source
processes
hadronic
models
inclxx
incl_physics
src
G4INCLNKToNKChannel.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:45
using
1.8.2 with
ECCE GitHub integration