Gabriele Cosmo
100 lines
4.0 KiB
C++
100 lines
4.0 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4LundStringFragmentation.cc,v 1.2 2003/11/03 17:54:53 hpw Exp $
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// GEANT4 tag $Name: geant4-06-00 $
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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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// History: first implementation, Maxim Komogorov, 10-Jul-1998
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// -----------------------------------------------------------------------------
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#include "G4LundStringFragmentation.hh"
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#include "Randomize.hh"
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// Class G4LundStringFragmentation
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//****************************************************************************************
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G4LundStringFragmentation::G4LundStringFragmentation()
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{
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}
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// G4LundStringFragmentation::G4LundStringFragmentation(G4double sigmaPt)
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// : G4VLongitudinalStringDecay(sigmaPt)
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// {
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// }
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G4LundStringFragmentation::G4LundStringFragmentation(const G4LundStringFragmentation &) : G4VLongitudinalStringDecay()
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{
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}
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G4LundStringFragmentation::~G4LundStringFragmentation()
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{
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}
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//****************************************************************************************
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const G4LundStringFragmentation & G4LundStringFragmentation::operator=(const G4LundStringFragmentation &)
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4LundStringFragmentation::operator= meant to not be accessable");
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return *this;
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}
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int G4LundStringFragmentation::operator==(const G4LundStringFragmentation &right) const
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{
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return !memcmp(this, &right, sizeof(G4LundStringFragmentation));
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}
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int G4LundStringFragmentation::operator!=(const G4LundStringFragmentation &right) const
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{
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return memcmp(this, &right, sizeof(G4LundStringFragmentation));
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}
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//****************************************************************************************
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G4double G4LundStringFragmentation::GetLightConeZ(G4double zmin, G4double zmax, G4int , G4ParticleDefinition* pHadron, G4double Px, G4double Py)
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{
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const G4double alund = 0.7/GeV/GeV;
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// If blund get restored, you MUST adapt the calculation of zOfMaxyf.
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// const G4double blund = 1;
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G4double z, yf;
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G4double Mass = pHadron->GetPDGMass();
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G4double Mt2 = Px*Px + Py*Py + Mass*Mass;
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G4double zOfMaxyf=alund*Mt2/(alund*Mt2 + 1.);
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G4double maxYf=(1-zOfMaxyf)/zOfMaxyf * exp(-alund*Mt2/zOfMaxyf);
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do
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{
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z = zmin + G4UniformRand()*(zmax-zmin);
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// yf = pow(1. - z, blund)/z*exp(-alund*Mt2/z);
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yf = (1-z)/z * exp(-alund*Mt2/z);
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}
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while (G4UniformRand()*maxYf > yf);
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return z;
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}
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//****************************************************************************************
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