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>> 27 // $Id: G4XPDGElastic.cc,v 1.3 2006/06/29 20:42:42 gunter Exp $ //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // PDG Elastic cross section 30 // PDG Elastic cross section
30 // PDG fits, Phys.Rev. D50 (1994), 1335 31 // PDG fits, Phys.Rev. D50 (1994), 1335
31 // 32 //
32 // 33 //
33 // ------------------------------------------- 34 // -------------------------------------------------------------------
34 35
35 #include "globals.hh" 36 #include "globals.hh"
36 #include "G4ios.hh" 37 #include "G4ios.hh"
37 #include "G4Log.hh" <<
38 #include "G4Pow.hh" <<
39 #include "G4SystemOfUnits.hh" <<
40 #include "G4XPDGElastic.hh" 38 #include "G4XPDGElastic.hh"
41 #include "G4KineticTrack.hh" 39 #include "G4KineticTrack.hh"
42 #include "G4ParticleDefinition.hh" 40 #include "G4ParticleDefinition.hh"
43 #include "G4DataVector.hh" 41 #include "G4DataVector.hh"
44 42
45 #include "G4AntiProton.hh" 43 #include "G4AntiProton.hh"
46 #include "G4AntiNeutron.hh" 44 #include "G4AntiNeutron.hh"
47 #include "G4Proton.hh" 45 #include "G4Proton.hh"
48 #include "G4Neutron.hh" 46 #include "G4Neutron.hh"
49 #include "G4PionPlus.hh" 47 #include "G4PionPlus.hh"
50 #include "G4PionMinus.hh" 48 #include "G4PionMinus.hh"
51 #include "G4KaonMinus.hh" 49 #include "G4KaonMinus.hh"
52 #include "G4KaonPlus.hh" 50 #include "G4KaonPlus.hh"
53 51
54 const G4double G4XPDGElastic::_lowLimit = 5. * 52 const G4double G4XPDGElastic::_lowLimit = 5. * GeV;
55 const G4double G4XPDGElastic::_highLimit = DBL 53 const G4double G4XPDGElastic::_highLimit = DBL_MAX;
56 54
57 // Parameters of the PDG Elastic cross-section 55 // Parameters of the PDG Elastic cross-section fit (Rev. Particle Properties, 1998)
58 // Columns are: lower and higher fit range, X, 56 // Columns are: lower and higher fit range, X, Y1, Y2
59 const G4int G4XPDGElastic::nPar = 7; 57 const G4int G4XPDGElastic::nPar = 7;
60 // p pi+ 58 // p pi+
61 const G4double G4XPDGElastic::pPiPlusPDGFit[7] 59 const G4double G4XPDGElastic::pPiPlusPDGFit[7] = { 2., 200., 0., 11.4, -0.4, 0.079, 0. };
62 // p pi- 60 // p pi-
63 const G4double G4XPDGElastic::pPiMinusPDGFit[7 61 const G4double G4XPDGElastic::pPiMinusPDGFit[7] = { 2., 360., 1.76, 11.2, -0.64, 0.043, 0. };
64 // p K+ 62 // p K+
65 const G4double G4XPDGElastic::pKPlusPDGFit[7] 63 const G4double G4XPDGElastic::pKPlusPDGFit[7] = { 2., 175., 5.0, 8.1, -1.8, 0.16, -1.3 };
66 // p K- 64 // p K-
67 const G4double G4XPDGElastic::pKMinusPDGFit[7] 65 const G4double G4XPDGElastic::pKMinusPDGFit[7] = { 2., 175., 7.3, 0., 0., 0.29, -2.40 };
68 // p p 66 // p p
69 const G4double G4XPDGElastic::ppPDGFit[7] = 67 const G4double G4XPDGElastic::ppPDGFit[7] = { 2., 2100., 11.9, 26.9, -1.21, 0.169, -1.85 };
70 // p pbar 68 // p pbar
71 const G4double G4XPDGElastic::ppbarPDGFit[7] = 69 const G4double G4XPDGElastic::ppbarPDGFit[7] = { 5., 1730000., 10.2, 52.7, -1.16, 0.125, -1.28 };
72 // n pbar 70 // n pbar
73 const G4double G4XPDGElastic::npbarPDGFit[7] = 71 const G4double G4XPDGElastic::npbarPDGFit[7] = { 1.1, 5.55, 36.5, 0., 0., 0., -11.9 };
74 72
75 73
76 G4XPDGElastic::G4XPDGElastic() 74 G4XPDGElastic::G4XPDGElastic()
77 { 75 {
78 const G4ParticleDefinition * proton = G4Prot << 76 G4String proton = G4Proton::ProtonDefinition()->GetParticleName();
79 const G4ParticleDefinition * neutron = G4Neu << 77 G4String neutron = G4Neutron::NeutronDefinition()->GetParticleName();
80 const G4ParticleDefinition * piPlus = G4Pion << 78 G4String piPlus = G4PionPlus::PionPlusDefinition()->GetParticleName();
81 const G4ParticleDefinition * piMinus = G4Pio << 79 G4String piMinus = G4PionMinus::PionMinusDefinition()->GetParticleName();
82 const G4ParticleDefinition * KPlus = G4KaonP << 80 G4String KPlus = G4KaonPlus::KaonPlusDefinition()->GetParticleName();
83 const G4ParticleDefinition * KMinus = G4Kaon << 81 G4String KMinus = G4KaonMinus::KaonMinusDefinition()->GetParticleName();
84 const G4ParticleDefinition * antiproton = G4 << 82 G4String antiproton = G4AntiProton::AntiProtonDefinition()->GetParticleName();
85 83
86 std::pair<const G4ParticleDefinition *,const << 84 std::pair<G4String,G4String> pp(proton,proton);
87 std::pair<const G4ParticleDefinition *,const << 85 std::pair<G4String,G4String> pn(proton,neutron);
88 std::pair<const G4ParticleDefinition *,const << 86 std::pair<G4String,G4String> piPlusp(piPlus,proton);
89 std::pair<const G4ParticleDefinition *,const << 87 std::pair<G4String,G4String> piMinusp(piMinus,proton);
90 std::pair<const G4ParticleDefinition *,const << 88 std::pair<G4String,G4String> KPlusp(KPlus,proton);
91 std::pair<const G4ParticleDefinition *,const << 89 std::pair<G4String,G4String> KMinusp(KMinus,proton);
92 std::pair<const G4ParticleDefinition *,const << 90 std::pair<G4String,G4String> nn(neutron,neutron);
93 std::pair<const G4ParticleDefinition *,const << 91 std::pair<G4String,G4String> ppbar(proton,antiproton);
94 std::pair<const G4ParticleDefinition *,const << 92 std::pair<G4String,G4String> npbar(antiproton,neutron);
95 93
96 std::vector<G4double> ppData; 94 std::vector<G4double> ppData;
97 std::vector<G4double> pPiPlusData; 95 std::vector<G4double> pPiPlusData;
98 std::vector<G4double> pPiMinusData; 96 std::vector<G4double> pPiMinusData;
99 std::vector<G4double> pKPlusData; 97 std::vector<G4double> pKPlusData;
100 std::vector<G4double> pKMinusData; 98 std::vector<G4double> pKMinusData;
101 std::vector<G4double> ppbarData; 99 std::vector<G4double> ppbarData;
102 std::vector<G4double> npbarData; 100 std::vector<G4double> npbarData;
103 101
104 G4int i; 102 G4int i;
105 for (i=0; i<2; i++) 103 for (i=0; i<2; i++)
106 { 104 {
107 ppData.push_back(ppPDGFit[i] * GeV); 105 ppData.push_back(ppPDGFit[i] * GeV);
108 pPiPlusData.push_back(pPiPlusPDGFit[i] * 106 pPiPlusData.push_back(pPiPlusPDGFit[i] * GeV);
109 pPiMinusData.push_back(pPiMinusPDGFit[i] 107 pPiMinusData.push_back(pPiMinusPDGFit[i] * GeV);
110 pKPlusData.push_back(pKPlusPDGFit[i] * G 108 pKPlusData.push_back(pKPlusPDGFit[i] * GeV);
111 pKMinusData.push_back(pKMinusPDGFit[i] * 109 pKMinusData.push_back(pKMinusPDGFit[i] * GeV);
112 ppbarData.push_back(ppbarPDGFit[i] * GeV 110 ppbarData.push_back(ppbarPDGFit[i] * GeV);
113 npbarData.push_back(npbarPDGFit[i] * GeV 111 npbarData.push_back(npbarPDGFit[i] * GeV);
114 } 112 }
115 113
116 for (i=2; i<nPar; i++) 114 for (i=2; i<nPar; i++)
117 { 115 {
118 ppData.push_back(ppPDGFit[i]); 116 ppData.push_back(ppPDGFit[i]);
119 pPiPlusData.push_back(pPiPlusPDGFit[i]); 117 pPiPlusData.push_back(pPiPlusPDGFit[i]);
120 pPiMinusData.push_back(pPiMinusPDGFit[i] 118 pPiMinusData.push_back(pPiMinusPDGFit[i]);
121 pKPlusData.push_back(pKPlusPDGFit[i]); 119 pKPlusData.push_back(pKPlusPDGFit[i]);
122 pKMinusData.push_back(pKMinusPDGFit[i]); 120 pKMinusData.push_back(pKMinusPDGFit[i]);
123 ppbarData.push_back(ppbarPDGFit[i]); 121 ppbarData.push_back(ppbarPDGFit[i]);
124 npbarData.push_back(npbarPDGFit[i]); 122 npbarData.push_back(npbarPDGFit[i]);
125 } 123 }
126 124
127 xMap[nn] = ppData; 125 xMap[nn] = ppData;
128 xMap[pp] = ppData; 126 xMap[pp] = ppData;
129 xMap[pn] = std::move(ppData); << 127 xMap[pn] = ppData;
130 xMap[piPlusp] = std::move(pPiPlusData); << 128 xMap[piPlusp] = pPiPlusData;
131 xMap[piMinusp] = std::move(pPiMinusData); << 129 xMap[piMinusp] = pPiMinusData;
132 xMap[KPlusp] = std::move(pKPlusData); << 130 xMap[KPlusp] = pKPlusData;
133 xMap[KMinusp] = std::move(pKMinusData); << 131 xMap[KMinusp] = pKMinusData;
134 xMap[ppbar] = std::move(ppbarData); << 132 xMap[ppbar] = ppbarData;
135 xMap[npbar] = std::move(npbarData); << 133 xMap[npbar] = npbarData;
136 } 134 }
137 135
138 136
139 G4XPDGElastic::~G4XPDGElastic() 137 G4XPDGElastic::~G4XPDGElastic()
140 { } 138 { }
141 139
142 140
143 G4bool G4XPDGElastic::operator==(const G4XPDGE 141 G4bool G4XPDGElastic::operator==(const G4XPDGElastic &right) const
144 { 142 {
145 return (this == (G4XPDGElastic *) &right); 143 return (this == (G4XPDGElastic *) &right);
146 } 144 }
147 145
148 146
149 G4bool G4XPDGElastic::operator!=(const G4XPDGE 147 G4bool G4XPDGElastic::operator!=(const G4XPDGElastic &right) const
150 { 148 {
151 return (this != (G4XPDGElastic *) &right); 149 return (this != (G4XPDGElastic *) &right);
152 } 150 }
153 151
154 152
155 G4double G4XPDGElastic::CrossSection(const G4K 153 G4double G4XPDGElastic::CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
156 { 154 {
157 // Elastic Cross-section fit, 1994 Review of 155 // Elastic Cross-section fit, 1994 Review of Particle Properties, (1994), 1
158 156
159 G4double sigma = 0.; 157 G4double sigma = 0.;
160 158
161 const G4ParticleDefinition* def1 = trk1.GetD << 159 G4ParticleDefinition* def1 = trk1.GetDefinition();
162 const G4ParticleDefinition* def2 = trk2.GetD << 160 G4ParticleDefinition* def2 = trk2.GetDefinition();
>> 161 G4String name1 = def1->GetParticleName();
>> 162 G4String name2 = def2->GetParticleName();
163 163
164 G4double sqrtS = (trk1.Get4Momentum() + trk2 164 G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
165 G4double m_1 = def1->GetPDGMass(); << 165 G4double m1 = def1->GetPDGMass();
166 G4double m_2 = def2->GetPDGMass(); << 166 G4double m2 = def2->GetPDGMass();
167 G4double m_max = std::max(m_1,m_2); << 167 G4double m = std::max(m1,m2);
168 // if (m1 > m) m = m1; 168 // if (m1 > m) m = m1;
169 169
170 G4double pLab = 0.; 170 G4double pLab = 0.;
171 171
172 if (m_max > 0. && sqrtS > (m_1 + m_2)) << 172 if (m > 0. && sqrtS > (m1 + m2))
173 { 173 {
174 pLab = std::sqrt( (sqrtS*sqrtS - (m_1+m_ << 174 pLab = std::sqrt( (sqrtS*sqrtS - (m1+m2)*(m1+m2) ) * (sqrtS*sqrtS - (m1-m2)*(m1-m2)) ) / (2*m);
175 175
176 // The PDG fit formula requires p in GeV 176 // The PDG fit formula requires p in GeV/c
177 177
>> 178 G4double enc1 = def1->GetPDGEncoding();
>> 179 G4double enc2 = def2->GetPDGEncoding();
>> 180 G4double coeff = -1.;
>> 181 if ( (enc1 < 0 && enc2 >0) || (enc2 < 0 && enc1 >0) ) coeff = 1.;
>> 182
178 // Order the pair: first is the lower ma 183 // Order the pair: first is the lower mass particle, second is the higher mass one
179 std::pair<const G4ParticleDefinition *,c << 184 std::pair<G4String,G4String> trkPair(def1->GetParticleName(),def2->GetParticleName());
180 if (def1->GetPDGMass() > def2->GetPDGMas 185 if (def1->GetPDGMass() > def2->GetPDGMass())
181 trkPair = std::pair<const G4ParticleDefiniti << 186 trkPair = std::pair<G4String,G4String>(def2->GetParticleName(),def1->GetParticleName());
182 187
183 std::vector<G4double> data; 188 std::vector<G4double> data;
184 G4double pMinFit = 0.; 189 G4double pMinFit = 0.;
185 G4double pMaxFit = 0.; 190 G4double pMaxFit = 0.;
186 G4double aFit = 0.; 191 G4double aFit = 0.;
187 G4double bFit = 0.; 192 G4double bFit = 0.;
188 G4double cFit = 0.; 193 G4double cFit = 0.;
189 G4double dFit = 0.; 194 G4double dFit = 0.;
190 G4double nFit = 0.; 195 G4double nFit = 0.;
191 196
192 // Debug 197 // Debug
193 // G4cout << "Map has " << xMap.size() << 198 // G4cout << "Map has " << xMap.size() << " elements" << G4endl;
194 // Debug end 199 // Debug end
195 200
196 if (xMap.find(trkPair) != xMap.end()) 201 if (xMap.find(trkPair) != xMap.end())
197 { 202 {
198 PairDoubleMap::const_iterator iter; 203 PairDoubleMap::const_iterator iter;
199 for (iter = xMap.begin(); iter != xMap.end 204 for (iter = xMap.begin(); iter != xMap.end(); ++iter)
200 { 205 {
201 std::pair<const G4ParticleDefinition * << 206 std::pair<G4String,G4String> thePair = (*iter).first;
202 if (thePair == trkPair) 207 if (thePair == trkPair)
203 { 208 {
204 data = (*iter).second; 209 data = (*iter).second;
205 pMinFit = data[0]; 210 pMinFit = data[0];
206 pMaxFit = data[1]; 211 pMaxFit = data[1];
207 aFit = data[2]; 212 aFit = data[2];
208 bFit = data[3]; 213 bFit = data[3];
209 cFit = data[5]; 214 cFit = data[5];
210 dFit = data[6]; 215 dFit = data[6];
211 nFit = data[4]; 216 nFit = data[4];
212 217
213 if (pLab < pMinFit) return 0.0; 218 if (pLab < pMinFit) return 0.0;
214 if (pLab > pMaxFit ) 219 if (pLab > pMaxFit )
215 G4cout << "WARNING! G4XPDGElastic::PDG 220 G4cout << "WARNING! G4XPDGElastic::PDGElastic "
216 << trk1.GetDefinition()->GetParticleN 221 << trk1.GetDefinition()->GetParticleName() << "-"
217 << trk2.GetDefinition()->GetParticleN 222 << trk2.GetDefinition()->GetParticleName()
218 << " elastic cross section: momentum 223 << " elastic cross section: momentum "
219 << pLab / GeV << " GeV outside valid 224 << pLab / GeV << " GeV outside valid fit range "
220 << pMinFit /GeV << "-" << pMaxFit / G 225 << pMinFit /GeV << "-" << pMaxFit / GeV
221 << G4endl; 226 << G4endl;
222 227
223 pLab /= GeV; 228 pLab /= GeV;
224 if (pLab > 0.) 229 if (pLab > 0.)
225 { 230 {
226 G4double logP = G4Log(pLab); << 231 G4double logP = std::log(pLab);
227 sigma = aFit + bFit * G4Pow::GetInst << 232 sigma = aFit + bFit * std::pow(pLab, nFit) + cFit * logP*logP + dFit * logP;
228 sigma = sigma * millibarn; 233 sigma = sigma * millibarn;
229 } 234 }
230 } 235 }
231 } 236 }
232 } 237 }
233 else 238 else
234 { 239 {
235 G4cout << "G4XPDGElastic::CrossSection - D 240 G4cout << "G4XPDGElastic::CrossSection - Data not found in Map" << G4endl;
236 } 241 }
237 } 242 }
238 243
239 if (sigma < 0.) 244 if (sigma < 0.)
240 { 245 {
241 G4cout << "WARNING! G4XPDGElastic::PDGEl 246 G4cout << "WARNING! G4XPDGElastic::PDGElastic "
242 << def1->GetParticleName() << "-" << de << 247 << name1 << "-" << name2
243 << " elastic cross section: momentum " 248 << " elastic cross section: momentum "
244 << pLab << " GeV, negative cross sectio 249 << pLab << " GeV, negative cross section "
245 << sigma / millibarn << " mb set to 0" 250 << sigma / millibarn << " mb set to 0" << G4endl;
246 sigma = 0.; 251 sigma = 0.;
247 } 252 }
248 253
249 return sigma; 254 return sigma;
250 } 255 }
251 256
252 257
253 G4String G4XPDGElastic::Name() const 258 G4String G4XPDGElastic::Name() const
254 { 259 {
255 G4String name = "PDGElastic "; 260 G4String name = "PDGElastic ";
256 return name; 261 return name;
257 } 262 }
258 263
259 264
260 G4bool G4XPDGElastic::IsValid(G4double e) cons 265 G4bool G4XPDGElastic::IsValid(G4double e) const
261 { 266 {
262 G4bool answer = InLimits(e,_lowLimit,_highLi 267 G4bool answer = InLimits(e,_lowLimit,_highLimit);
263 268
264 return answer; 269 return answer;
265 } 270 }
266 271
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