include/Geant4/G4INCLPhaseSpaceGenerator.hh

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0025 //
0026 // INCL++ intra-nuclear cascade model
0027 // Alain Boudard, CEA-Saclay, France
0028 // Joseph Cugnon, University of Liege, Belgium
0029 // Jean-Christophe David, CEA-Saclay, France
0030 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
0031 // Sylvie Leray, CEA-Saclay, France
0032 // Davide Mancusi, CEA-Saclay, France
0033 //
0034 #define INCLXX_IN_GEANT4_MODE 1
0035
0036 #include "globals.hh"
0037
0038 #ifndef G4INCLPHASESPACEGENERATOR_HH
0039 #define G4INCLPHASESPACEGENERATOR_HH 1
0040
0041 #include "G4INCLIPhaseSpaceGenerator.hh"
0042 #include "G4INCLConfig.hh"
0043
0044 namespace G4INCL {
0045   namespace PhaseSpaceGenerator {
0046     /// \brief Generate an event in the CM system
0047     void generate(const G4double sqrtS, ParticleList &particles);
0048
0049     /** \brief Generate a biased event in the CM system
0050      *
0051      * This method first generates a "flat" event by calling generate(). The
0052      * particles are subsequently rotated in such a way that one of them
0053      * (identified by the parameter index) is biased towards the collisionAxis
0054      * with an exponential distribution of the form
0055      * \f[
0056      * \exp(B\cdot t)
0057      * \f]
0058      * where \f$t\f$ is the usual Mandelstam variable. The incoming momentum
0059      * is taken to be the momentum of particles[index] at the moment of the
0060      * call.
0061      *
0062      * \param sqrtS total energy in the centre of mass, in MeV
0063      * \param particles list of particles for which the event will be generated
0064      *        (modified on exit)
0065      * \param index index of the particle to be biased; all the other particles
0066      *        will follow
0067      * \param slope slope \f$B\f$ of the angular distribution: \f$\exp(Bt)\f$,
0068      *        in (GeV/c)^(-2)
0069      */
0070     void generateBiased(const G4double sqrtS, ParticleList &particles, const size_t index, const G4double slope);
0071
0072     void setPhaseSpaceGenerator(IPhaseSpaceGenerator *g);
0073
0074     IPhaseSpaceGenerator *getPhaseSpaceGenerator();
0075
0076     void deletePhaseSpaceGenerator();
0077
0078     void initialize(Config const * const theConfig);
0079   }
0080 }
0081
0082 #endif