include/Pythia8/PartonVertex.h

0001 // PartonVertex.h is a part of the PYTHIA event generator.
0002 // Copyright (C) 2024 Torbjorn Sjostrand.
0003 // PYTHIA is licenced under the GNU GPL v2 or later, see COPYING for details.
0004 // Please respect the MCnet Guidelines, see GUIDELINES for details.
0005
0006 // Header file for vertex information during the parton-level evolution.
0007
0008 #ifndef Pythia8_PartonVertex_H
0009 #define Pythia8_PartonVertex_H
0010
0011 #include "Pythia8/Basics.h"
0012 #include "Pythia8/Event.h"
0013 #include "Pythia8/Info.h"
0014 #include "Pythia8/PhysicsBase.h"
0015 #include "Pythia8/PythiaStdlib.h"
0016 #include "Pythia8/Settings.h"
0017
0018 namespace Pythia8 {
0019
0020 //==========================================================================
0021
0022 // The PartonVertex class sets parton-level vertex information.
0023
0024 class PartonVertex : public PhysicsBase {
0025
0026 public:
0027
0028   // Constructor.
0029   PartonVertex() : doVertex(), modeVertex(), epsPhi(), epsRat(), rProton(),
0030     rProton2(), pTmin(), widthEmission(), bNow(), bHalf(), xMax(), yMax(),
0031     zWtMax() {}
0032
0033   // Destructor.
0034   virtual ~PartonVertex() {}
0035
0036   // Initialize a few parameters from Settings.
0037   virtual void init();
0038
0039   // Select vertex for a beam particle.
0040   virtual void vertexBeam( int iBeam, vector<int>& iRemn, vector<int>& iInit,
0041     Event& event);
0042
0043   // Select vertex for an MPI.
0044   virtual void vertexMPI( int iBeg, int nAdd, double bNowIn, Event& event);
0045
0046   // Select vertex for an FSR branching.
0047   virtual void vertexFSR( int iNow, Event& event);
0048
0049   // Select vertex for an ISR branching.
0050   virtual void vertexISR( int iNow, Event& event);
0051
0052   // Propagate parton vertex information to hadrons.
0053   virtual void vertexHadrons( int nBefFrag, Event& event);
0054
0055 private:
0056
0057   // Data related to currently implemented models.
0058   bool   doVertex;
0059   int    modeVertex;
0060   double epsPhi, epsRat, rProton, rProton2, pTmin, widthEmission;
0061
0062   // Current values.
0063   double bNow, bHalf, xMax, yMax, zWtMax;
0064
0065 };
0066
0067 //==========================================================================
0068
0069 } // end namespace Pythia8
0070
0071 #endif // Pythia8_PartonVertex_H