include/Geant4/G4INCLCrossSectionsTruncatedMultiPions.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 /** \file G4INCLCrossSectionsTruncatedMultiPions.hh
0039  * \brief Truncated multipion cross sections
0040  *
0041  * \date 10th December 2014
0042  * \author Davide Mancusi
0043  */
0044
0045 #ifndef G4INCLCROSSSECTIONSTRUNCATEDMULTIPIONS_HH
0046 #define G4INCLCROSSSECTIONSTRUNCATEDMULTIPIONS_HH
0047
0048 #include "G4INCLCrossSectionsMultiPions.hh"
0049 #include <limits>
0050
0051 namespace G4INCL {
0052   /// \brief Truncated multipion cross sections
0053
0054   class CrossSectionsTruncatedMultiPions : public CrossSectionsMultiPions {
0055     public:
0056       CrossSectionsTruncatedMultiPions(const G4int nPi=std::numeric_limits<G4int>::max());
0057
0058       /** \brief Elastic particle-particle cross section
0059        *
0060        * The elastic pi-N cross section is calculated by difference:
0061        *   elastic = total - inelastic(pion production) - delta,
0062        * but we need to use the unmodified piNToDelta cross section, or else we
0063        * will violate the cross-section sum.
0064        *
0065        * This modification is only necessary for piN collisions.
0066        */
0067       virtual G4double elastic(Particle const * const p1, Particle const * const p2);
0068
0069       /// \brief Cross section for Delta production - piN Channel
0070       virtual G4double piNToDelta(Particle const * const p1, Particle const * const p2);
0071
0072       /// \brief Cross section for X pion production - piN Channel
0073       virtual G4double piNToxPiN(const G4int xpi, Particle const * const p1, Particle const * const p2);
0074
0075       /// \brief Cross section for X pion production - NN Channel
0076       virtual G4double NNToxPiNN(const G4int xpi, Particle const * const p1, Particle const * const p2);
0077
0078     protected:
0079
0080       /// \brief Maximum number of pions produced in TruncatedMultiPion collisions
0081       const G4int nMaxPi;
0082
0083   };
0084 }
0085
0086 #endif