Gabriele Cosmo
217 lines
6.9 KiB
C++
217 lines
6.9 KiB
C++
//
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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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//
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// ------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// ---------------- G4FragmentingString ----------------
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// by Gunter Folger, September 2001.
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// class for an excited string used in Fragmention
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// ------------------------------------------------------------
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// G4FragmentingString
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#include "G4FragmentingString.hh"
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#include "G4ExcitedString.hh"
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//---------------------------------------------------------------------------------
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//---------------------------------------------------------------------------------
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G4FragmentingString::G4FragmentingString(const G4FragmentingString &old)
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{
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LeftParton=old.LeftParton;
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RightParton=old.RightParton;
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Ptleft=old.Ptleft;
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Ptright=old.Ptright;
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Pplus=old.Pplus;
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Pminus=old.Pminus;
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decaying=old.decaying;
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}
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//---------------------------------------------------------------------------------
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G4FragmentingString::G4FragmentingString(const G4ExcitedString &excited)
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{
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LeftParton=excited.GetLeftParton()->GetDefinition();
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RightParton=excited.GetRightParton()->GetDefinition();
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Ptleft=excited.GetLeftParton()->Get4Momentum().vect();
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Ptleft.setZ(0.);
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Ptright=excited.GetRightParton()->Get4Momentum().vect();
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Ptright.setZ(0.);
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G4LorentzVector P=excited.Get4Momentum();
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Pplus =P.e() + P.pz();
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Pminus=P.e() - P.pz();
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decaying=None;
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}
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//---------------------------------------------------------------------------------
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G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
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G4ParticleDefinition * newdecay,
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const G4LorentzVector *momentum)
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{
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decaying=None;
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if ( old.decaying == Left )
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{
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RightParton= old.RightParton;
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Ptright = old.Ptright;
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LeftParton = newdecay;
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Ptleft = old.Ptleft - momentum->vect();
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Ptleft.setZ(0.);
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} else if ( old.decaying == Right )
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{
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RightParton = newdecay;
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Ptright = old.Ptright - momentum->vect();
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Ptright.setZ(0.);
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LeftParton = old.LeftParton;
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Ptleft = old.Ptleft;
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} else
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined");
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}
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Pplus = old.Pplus - (momentum->e() + momentum->pz());
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Pminus = old.Pminus - (momentum->e() - momentum->pz());
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//G4double Eold=0.5 * (old.Pplus + old.Pminus);
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//G4double Enew=0.5 * (Pplus + Pminus);
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}
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//---------------------------------------------------------------------------------
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G4FragmentingString::~G4FragmentingString()
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{}
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//---------------------------------------------------------------------------------
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void G4FragmentingString::SetLeftPartonStable()
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{
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theStableParton=GetLeftParton();
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theDecayParton=GetRightParton();
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decaying=Right;
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}
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//---------------------------------------------------------------------------------
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void G4FragmentingString::SetRightPartonStable()
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{
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theStableParton=GetRightParton();
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theDecayParton=GetLeftParton();
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decaying=Left;
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}
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//---------------------------------------------------------------------------------
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G4int G4FragmentingString::GetDecayDirection() const
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{
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if (decaying == Left ) return +1;
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else if (decaying == Right) return -1;
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else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::GetDecayDirection: decay side UNdefined!");
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return 0;
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}
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//---------------------------------------------------------------------------------
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G4bool G4FragmentingString::FourQuarkString() const
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{
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return LeftParton->GetParticleSubType()== "di_quark"
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&& RightParton->GetParticleSubType()== "di_quark";
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}
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//---------------------------------------------------------------------------------
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G4bool G4FragmentingString::DecayIsQuark()
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{
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return theDecayParton->GetParticleSubType()== "quark";
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}
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G4bool G4FragmentingString::StableIsQuark()
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{
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return theStableParton->GetParticleSubType()== "quark";
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}
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//---------------------------------------------------------------------------------
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G4ThreeVector G4FragmentingString::StablePt()
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{
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if (decaying == Left ) return Ptright;
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else if (decaying == Right ) return Ptleft;
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else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
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return G4ThreeVector();
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}
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G4ThreeVector G4FragmentingString::DecayPt()
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{
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if (decaying == Left ) return Ptleft;
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else if (decaying == Right ) return Ptright;
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else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
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return G4ThreeVector();
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}
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//---------------------------------------------------------------------------------
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G4double G4FragmentingString::LightConePlus()
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{
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return Pplus;
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}
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G4double G4FragmentingString::LightConeMinus()
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{
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return Pminus;
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}
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G4double G4FragmentingString::LightConeDecay()
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{
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if (decaying == Left ) return Pplus;
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else if (decaying == Right ) return Pminus;
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else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
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return 0;
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}
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//---------------------------------------------------------------------------------
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G4LorentzVector G4FragmentingString::Get4Momentum() const
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{
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G4LorentzVector momentum(Ptleft+Ptright,0);
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momentum.setPz(0.5*(Pplus-Pminus));
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momentum.setE(0.5*(Pplus+Pminus));
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return momentum;
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}
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G4double G4FragmentingString::Mass2() const
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{
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return Pplus*Pminus - (Ptleft+Ptright).mag2();
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}
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G4double G4FragmentingString::Mass() const
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{
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return std::sqrt(this->Mass2());
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}
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