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G4XMesonBaryonElastic.cc
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27 
28 #include "globals.hh"
29 #include "G4ios.hh"
30 #include "G4XMesonBaryonElastic.hh"
31 #include "G4KineticTrack.hh"
32 #include "G4Gamma.hh"
33 #include "G4PionPlus.hh"
34 #include "G4Proton.hh"
35 #include "G4XAqmElastic.hh"
36 #include "G4XPDGElastic.hh"
37 
39 {
40  // As a first approximation the model is assumed to be valid over
41  // the entire energy range
42  lowLimit = 0.;
44 }
45 
46 
48 { }
49 
50 
52 {
53  return (this == (G4XMesonBaryonElastic *) &right);
54 }
55 
56 
58 {
59  return (this != (G4XMesonBaryonElastic *) &right);
60 }
61 
62 
64 {
65  G4double sigma;
66 
67  // No gamma-baryon elastic scattering
68  const G4ParticleDefinition* defLight = FindLightParticle(trk1,trk2);
69  if (defLight == G4Gamma::GammaDefinition())
70  {
71  sigma = 0;
72  }
73  else
74  {
75 
76  G4LorentzVector p41 = trk1.Get4Momentum();
77  G4ThreeVector p3 = trk1.GetPosition();
79 
80  G4KineticTrack piTrk(def,
81  trk1.GetFormationTime(),
82  p3,
83  (G4LorentzVector&)p41);
84 
85  G4LorentzVector p42 = trk2.Get4Momentum();
87  trk2.GetFormationTime(),
88  (G4ThreeVector)trk2.GetPosition(),
89  (G4LorentzVector&)p42);
90 
91  G4XAqmElastic aqm;
92  G4double xAqmDummy = aqm.CrossSection(piTrk,pTrk);
93  G4double xAqm = aqm.CrossSection(trk1,trk2);
94  G4double factor = 1.;
95  if (xAqmDummy != 0.0)
96  {
97  factor = xAqm / xAqmDummy;
98  }
100 
101  sigma = pdg.CrossSection(piTrk,pTrk);
102  sigma = sigma * factor;
103  }
104 
105  return sigma;
106 }
107 
108 
110 {
111  G4String name("MesonBaryonElasticCrossSection");
112  return name;
113 }
114 
115 
116 
118 {
119  G4bool answer = InLimits(e,lowLimit,highLimit);
120 
121  return answer;
122 }