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26 26
27 27
28 #include "G4NeutrinoElectronCcXsc.hh" 28 #include "G4NeutrinoElectronCcXsc.hh"
29 #include "G4PhysicalConstants.hh" 29 #include "G4PhysicalConstants.hh"
30 #include "G4SystemOfUnits.hh" 30 #include "G4SystemOfUnits.hh"
31 #include "G4DynamicParticle.hh" 31 #include "G4DynamicParticle.hh"
32 #include "G4ParticleTable.hh" 32 #include "G4ParticleTable.hh"
33 #include "G4IonTable.hh" 33 #include "G4IonTable.hh"
34 #include "G4HadTmpUtil.hh" 34 #include "G4HadTmpUtil.hh"
35 #include "G4NistManager.hh" 35 #include "G4NistManager.hh"
36 36
37 #include "G4MuonMinus.hh" 37 #include "G4MuonMinus.hh"
38 #include "G4TauMinus.hh" 38 #include "G4TauMinus.hh"
39 39
40 using namespace std; 40 using namespace std;
41 using namespace CLHEP; 41 using namespace CLHEP;
42 42
43 G4NeutrinoElectronCcXsc::G4NeutrinoElectronCcX 43 G4NeutrinoElectronCcXsc::G4NeutrinoElectronCcXsc()
44 : G4VCrossSectionDataSet("NuElectronCcXsc") 44 : G4VCrossSectionDataSet("NuElectronCcXsc")
45 { 45 {
46 // PDG2016: Gf=1.1663787(6)e-5*(hc)^3/GeV^2 46 // PDG2016: Gf=1.1663787(6)e-5*(hc)^3/GeV^2
47 // fCofXsc = Gf*Gf*MeC2*2/pi 47 // fCofXsc = Gf*Gf*MeC2*2/pi
48 48
49 fCofXsc = 1.36044e-22; 49 fCofXsc = 1.36044e-22;
50 fCofXsc *= hbarc*hbarc*electron_mass_c2; 50 fCofXsc *= hbarc*hbarc*electron_mass_c2;
51 fCofXsc /= halfpi; 51 fCofXsc /= halfpi;
52 52
53 // G4cout<<"fCofXsc = "<<fCofXsc*GeV/cm2<<" 53 // G4cout<<"fCofXsc = "<<fCofXsc*GeV/cm2<<" cm2/GeV"<<G4endl;
54 54
55 // G4cout<<"hbarc = "<<hbarc/MeV/fermi<<" Me 55 // G4cout<<"hbarc = "<<hbarc/MeV/fermi<<" MeV*fermi"<<G4endl;
56 56
57 // PDG2016: sin^2 theta Weinberg 57 // PDG2016: sin^2 theta Weinberg
58 58
59 fSin2tW = 0.23129; // 0.2312; 59 fSin2tW = 0.23129; // 0.2312;
60 60
61 fCutEnergy = 0.; // default value 61 fCutEnergy = 0.; // default value
62 62
63 fBiasingFactor = 1.; // default as physics 63 fBiasingFactor = 1.; // default as physics
64 64
65 theMuonMinus = G4MuonMinus::MuonMinus(); 65 theMuonMinus = G4MuonMinus::MuonMinus();
66 theTauMinus = G4TauMinus::TauMinus(); 66 theTauMinus = G4TauMinus::TauMinus();
67 } 67 }
68 68
69 G4NeutrinoElectronCcXsc::~G4NeutrinoElectronCc 69 G4NeutrinoElectronCcXsc::~G4NeutrinoElectronCcXsc()
70 {} 70 {}
71 71
72 ////////////////////////////////////////////// 72 //////////////////////////////////////////////////////
73 73
74 G4bool 74 G4bool
75 G4NeutrinoElectronCcXsc::IsElementApplicable( 75 G4NeutrinoElectronCcXsc::IsElementApplicable( const G4DynamicParticle* aPart, G4int, const G4Material*)
76 { 76 {
77 G4bool result = false; 77 G4bool result = false;
78 G4String pName = aPart->GetDefinition()->Get 78 G4String pName = aPart->GetDefinition()->GetParticleName();
79 G4double minEnergy = 0., energy = aPart->Get 79 G4double minEnergy = 0., energy = aPart->GetTotalEnergy();
80 G4double fmass, emass = electron_mass_c2; 80 G4double fmass, emass = electron_mass_c2;
81 81
82 if( pName == "anti_nu_e" || pName == "n << 82 if( pName == "nu_mu" || pName == "anti_nu_mu" ) fmass = theMuonMinus->GetPDGMass();
83 else if( pName == "nu_tau" || pName == "ant 83 else if( pName == "nu_tau" || pName == "anti_nu_tau" ) fmass = theTauMinus->GetPDGMass();
84 else fmass = emass; 84 else fmass = emass;
85 85
86 minEnergy = (fmass-emass)*(fmass+emass)/emas 86 minEnergy = (fmass-emass)*(fmass+emass)/emass;
87 87
88 if( ( pName == "nu_mu" || pName == "anti_nu 88 if( ( pName == "nu_mu" || pName == "anti_nu_mu" ||
89 pName == "nu_tau" || pName == "anti_nu 89 pName == "nu_tau" || pName == "anti_nu_tau" ) &&
90 energy > minEnergy 90 energy > minEnergy )
91 { 91 {
92 result = true; 92 result = true;
93 } 93 }
94 return result; 94 return result;
95 } 95 }
96 96
97 ////////////////////////////////////////////// 97 ////////////////////////////////////////////////////
98 98
99 G4double G4NeutrinoElectronCcXsc:: 99 G4double G4NeutrinoElectronCcXsc::
100 GetElementCrossSection(const G4DynamicParticle 100 GetElementCrossSection(const G4DynamicParticle* aPart, G4int ZZ,
101 const G4Material*) 101 const G4Material*)
102 { 102 {
103 G4double result = 0., totS, fmass, fmass2, e 103 G4double result = 0., totS, fmass, fmass2, emass=electron_mass_c2, emass2;
104 104
105 G4double energy = aPart->GetTotalEnergy(); 105 G4double energy = aPart->GetTotalEnergy();
106 G4String pName = aPart->GetDefinition()->G 106 G4String pName = aPart->GetDefinition()->GetParticleName();
107 107
108 emass2 = emass*emass; 108 emass2 = emass*emass;
109 totS = 2.*energy*emass + emass2; 109 totS = 2.*energy*emass + emass2;
110 110
111 if( pName == "anti_nu_e" || pName == "nu_mu" << 111 if( pName == "nu_mu")
112 { 112 {
113 fmass = theMuonMinus->GetPDGMass(); 113 fmass = theMuonMinus->GetPDGMass();
114 fmass2 = fmass*fmass; 114 fmass2 = fmass*fmass;
115 result = (1. - fmass2/totS)*(1. - fmass2/t 115 result = (1. - fmass2/totS)*(1. - fmass2/totS);
116 } 116 }
117 else if( pName == "anti_nu_mu") 117 else if( pName == "anti_nu_mu")
118 { 118 {
119 fmass = theMuonMinus->GetPDGMass(); 119 fmass = theMuonMinus->GetPDGMass();
120 fmass2 = fmass*fmass; 120 fmass2 = fmass*fmass;
121 121
122 result = (1.+ emass2/totS)*(1.+ fmass2/to 122 result = (1.+ emass2/totS)*(1.+ fmass2/totS);
123 result += (1.- emass2/totS)*(1.- fmass2/to 123 result += (1.- emass2/totS)*(1.- fmass2/totS)/3.;
124 result *= 0.25*(1. - fmass2/totS)*(1. - fm 124 result *= 0.25*(1. - fmass2/totS)*(1. - fmass2/totS);
125 } 125 }
126 else if( pName == "nu_tau") 126 else if( pName == "nu_tau")
127 { 127 {
128 fmass = theTauMinus->GetPDGMass(); 128 fmass = theTauMinus->GetPDGMass();
129 fmass2 = fmass*fmass; 129 fmass2 = fmass*fmass;
130 result = (1. - fmass2/totS)*(1. - fmass2/t 130 result = (1. - fmass2/totS)*(1. - fmass2/totS);
131 } 131 }
132 else if( pName == "anti_nu_tau") 132 else if( pName == "anti_nu_tau")
133 { 133 {
134 fmass = theTauMinus->GetPDGMass(); 134 fmass = theTauMinus->GetPDGMass();
135 fmass2 = fmass*fmass; 135 fmass2 = fmass*fmass;
136 136
137 result = (1.+ emass2/totS)*(1.+ fmass2/to 137 result = (1.+ emass2/totS)*(1.+ fmass2/totS);
138 result += (1.- emass2/totS)*(1.- fmass2/to 138 result += (1.- emass2/totS)*(1.- fmass2/totS)/3.;
139 result *= 0.25*(1. - fmass2/totS)*(1. - fm 139 result *= 0.25*(1. - fmass2/totS)*(1. - fmass2/totS);
140 } 140 }
141 else 141 else
142 { 142 {
143 return result; 143 return result;
144 } 144 }
145 // if( energy <= electron_mass_c2 ) return r 145 // if( energy <= electron_mass_c2 ) return result;
146 146
147 G4double aa = 1.; <<
148 G4double bb = 1.7; <<
149 G4double gw = 2.141*GeV; <<
150 G4double dd = 5000.; <<
151 G4double mw = 80.385*GeV; <<
152 <<
153 if( energy > 50.*GeV ) <<
154 { <<
155 result *= bb; <<
156 result /= 1.+ aa*totS/mw/mw; <<
157 <<
158 if( pName == "anti_nu_e") <<
159 { <<
160 result *= 1. + dd*gw*gw*totS/( (totS-mw* <<
161 } <<
162 } <<
163 result *= fCofXsc; //*energy; 147 result *= fCofXsc; //*energy;
164 result *= energy + 0.5*emass; 148 result *= energy + 0.5*emass;
165 result *= ZZ; // incoherent sum over all e 149 result *= ZZ; // incoherent sum over all element electrons
166 150
167 result *= fBiasingFactor; // biasing up, if 151 result *= fBiasingFactor; // biasing up, if set >1
168 152
169 return result; 153 return result;
170 } 154 }
171 155
172 156