source: trunk/source/processes/hadronic/models/parton_string/diffraction/src/G4FTFParameters.cc@ 1089

Last change on this file since 1089 was 1007, checked in by garnier, 17 years ago

update to geant4.9.2
File size: 14.4 KB
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25//
26//
27// $Id: G4FTFParameters.cc,v 1.4 2008/12/18 13:02:00 gunter Exp $
28// GEANT4 tag $Name: geant4-09-02 $
29//
30
31#include "G4FTFParameters.hh"
32
33G4FTFParameters::G4FTFParameters()
34{;}
35
36
37G4FTFParameters::~G4FTFParameters()
38{;}
39//**********************************************************************************************
40
41G4FTFParameters::G4FTFParameters(const G4ParticleDefinition * particle,
42 G4double theA,
43 G4double theZ,
44 G4double s)
45 {
46 G4int PDGcode = particle->GetPDGEncoding();
47 G4int absPDGcode = std::abs(PDGcode);
48 G4double Elab = (s - 2*0.88*GeV*GeV)/(2*0.939*GeV)/GeV;
49 G4double Plab = std::sqrt(Elab * Elab - 0.88);
50
51 G4double LogPlab = std::log( Plab );
52 G4double sqrLogPlab = LogPlab * LogPlab;
53
54//G4cout<<"G4FTFParameters Plab "<<Plab<<G4endl;
55
56 G4int NumberOfTargetProtons = (G4int) theZ;
57 G4int NumberOfTargetNeutrons = (G4int) theA- (G4int) theZ;
58 G4int NumberOfTargetNucleons = NumberOfTargetProtons + NumberOfTargetNeutrons;
59
60 G4double Xtotal, Xelastic;
61
62 if( absPDGcode > 1000 ) //------Projectile is baryon --------
63 {
64 G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab;
65 G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab;
66
67 G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
68 G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
69
70 Xtotal = ( NumberOfTargetProtons * XtotPP +
71 NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons;
72 Xelastic = ( NumberOfTargetProtons * XelPP +
73 NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons;
74 }
75 else if( PDGcode == 211 ) //------Projectile is PionPlus -------
76 {
77 G4double XtotPiP = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab;
78 G4double XtotPiN = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab;
79
80 G4double XelPiP = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab;
81 G4double XelPiN = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab;
82
83 Xtotal = ( NumberOfTargetProtons * XtotPiP +
84 NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
85 Xelastic = ( NumberOfTargetProtons * XelPiP +
86 NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
87 }
88 else if( PDGcode == -211 ) //------Projectile is PionMinus -------
89 {
90 G4double XtotPiP = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab;
91 G4double XtotPiN = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab;
92
93 G4double XelPiP = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab;
94 G4double XelPiN = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab;
95
96 Xtotal = ( NumberOfTargetProtons * XtotPiP +
97 NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
98 Xelastic = ( NumberOfTargetProtons * XelPiP +
99 NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
100 }
101
102 else if( PDGcode == 111 ) //------Projectile is PionZero -------
103 {
104 G4double XtotPiP =(16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab + //Pi+
105 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab)/2; //Pi-
106
107 G4double XtotPiN =(33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab + //Pi+
108 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
109
110 G4double XelPiP =( 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab + //Pi+
111 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
112 G4double XelPiN =( 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab + //Pi+
113 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
114
115 Xtotal = ( NumberOfTargetProtons * XtotPiP +
116 NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
117 Xelastic = ( NumberOfTargetProtons * XelPiP +
118 NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
119 }
120 else if( PDGcode == 321 ) //------Projectile is KaonPlus -------
121 {
122 G4double XtotKP = 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab;
123 G4double XtotKN = 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab;
124
125 G4double XelKP = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab;
126 G4double XelKN = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab;
127
128 Xtotal = ( NumberOfTargetProtons * XtotKP +
129 NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
130 Xelastic = ( NumberOfTargetProtons * XelKP +
131 NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
132 }
133 else if( PDGcode ==-321 ) //------Projectile is KaonMinus ------
134 {
135 G4double XtotKP = 32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab;
136 G4double XtotKN = 25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab;
137
138 G4double XelKP = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab;
139 G4double XelKN = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab;
140
141 Xtotal = ( NumberOfTargetProtons * XtotKP +
142 NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
143 Xelastic = ( NumberOfTargetProtons * XelKP +
144 NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
145 }
146 else if( PDGcode == 311 ) //------Projectile is KaonZero ------
147 {
148 G4double XtotKP =( 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab + //K+
149 32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab)/2; //K-
150 G4double XtotKN =( 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab + //K+
151 25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab)/2; //K-
152
153 G4double XelKP =( 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab + //K+
154 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab)/2; //K-
155 G4double XelKN =( 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab + //K+
156 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab)/2; //K-
157 Xtotal = ( NumberOfTargetProtons * XtotKP +
158 NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
159 Xelastic = ( NumberOfTargetProtons * XelKP +
160 NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
161 }
162 else //------Projectile is undefined, Nucleon assumed
163 {
164 G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab;
165 G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab;
166
167 G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
168 G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
169
170 Xtotal = ( NumberOfTargetProtons * XtotPP +
171 NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons;
172 Xelastic = ( NumberOfTargetProtons * XelPP +
173 NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons;
174 };
175
176// Xtotal and Xelastic in mb
177
178//----------- Geometrical parameters ------------------------------------------------
179 SetTotalCrossSection(Xtotal);
180 SetElastisCrossSection(Xelastic);
181 SetInelasticCrossSection(Xtotal-Xelastic);
182
183// // Interactions with elastic ans inelastic collisions
184 SetProbabilityOfElasticScatt(Xtotal, Xelastic);
185 SetRadiusOfHNinteractions2(Xtotal/pi/10.);
186//
187/* //==== No elastic scattering ============================
188 SetProbabilityOfElasticScatt(Xtotal, 0.);
189 SetRadiusOfHNinteractions2((Xtotal-Xelastic)/pi/10.);
190*/ //=======================================================
191
192//G4cout<<" Rnn "<<Xtotal/pi/10.<<" "<<Xtotal/pi/10.*fermi*fermi<<G4endl;
193//G4cout<<"G4FTFParameters Xt Xel MeV "<<Xtotal<<" "<<Xelastic<<" "<<GeV<<G4endl;
194
195//-----------------------------------------------------------------------------------
196 SetSlope( Xtotal*Xtotal/16./pi/Xelastic/0.3894 ); // Slope parameter of elastic scattering
197 // (GeV/c)^(-2))
198//G4cout<<"G4FTFParameters Slope "<<GetSlope()<<G4endl;
199//-----------------------------------------------------------------------------------
200 SetGamma0( GetSlope()*Xtotal/10./2./pi );
201
202//----------- Parameters of elastic scattering --------------------------------------
203 // Gaussian parametrization of
204 // elastic scattering amplitude assumed
205 SetAvaragePt2ofElasticScattering(1./(Xtotal*Xtotal/16./pi/Xelastic/0.3894)*GeV*GeV);
206
207//----------- Parameters of excitations ---------------------------------------------
208 if( absPDGcode > 1000 ) //------Projectile is baryon --------
209 {
210 SetProjMinDiffMass(1.1); // GeV
211 SetProjMinNonDiffMass(1.1); // GeV
212 SetProbabilityOfProjDiff(0.95*std::pow(s/GeV/GeV,-0.35)); // 40/32 X-dif/X-inel
213
214 SetTarMinDiffMass(1.1); // GeV
215 SetTarMinNonDiffMass(1.1); // GeV
216 SetProbabilityOfTarDiff(0.95*std::pow(s/GeV/GeV,-0.35)); // 40/32 X-dif/X-inel
217
218 SetAveragePt2(0.3); // GeV^2
219 }
220 else if( absPDGcode == 211 || PDGcode == 111) //------Projectile is Pion -----------
221 {
222 SetProjMinDiffMass(0.5); // GeV
223 SetProjMinNonDiffMass(0.3); // GeV
224 SetProbabilityOfProjDiff(0.62*std::pow(s/GeV/GeV,-0.51)); // 40/32 X-dif/X-inel
225
226 SetTarMinDiffMass(1.1); // GeV
227 SetTarMinNonDiffMass(1.1); // GeV
228 SetProbabilityOfTarDiff(0.62*std::pow(s/GeV/GeV,-0.51)); // 40/32 X-dif/X-inel
229
230/*
231SetProjMinDiffMass(0.5);
232SetProjMinNonDiffMass(0.3); // Uzhi 12.06.08
233SetProbabilityOfProjDiff(0.05);
234SetProbabilityOfTarDiff(0.05);
235*/
236 SetAveragePt2(0.3); // GeV^2
237 }
238 else if( absPDGcode == 321 || PDGcode == -311) //------Projectile is Kaon -----------
239 {
240 SetProjMinDiffMass(0.7); // GeV 1.1
241 SetProjMinNonDiffMass(0.7); // GeV
242 SetProbabilityOfProjDiff(0.85*std::pow(s/GeV/GeV,-0.5)); // 40/32 X-dif/X-inel
243
244 SetTarMinDiffMass(1.1); // GeV
245 SetTarMinNonDiffMass(1.1); // GeV
246 SetProbabilityOfTarDiff(0.85*std::pow(s/GeV/GeV,-0.5)); // 40/32 X-dif/X-inel
247
248 SetAveragePt2(0.3); // GeV^2
249 }
250 else //------Projectile is undefined,
251 //------Nucleon assumed
252 {
253 SetProjMinDiffMass((particle->GetPDGMass()+160.*MeV)/GeV);
254 SetProjMinNonDiffMass((particle->GetPDGMass()+160.*MeV)/GeV);
255 SetProbabilityOfProjDiff(0.95*std::pow(s/GeV/GeV,-0.35)); // 40/32 X-dif/X-inel
256
257 SetTarMinDiffMass(1.1); // GeV
258 SetTarMinNonDiffMass(1.1); // GeV
259 SetProbabilityOfTarDiff(0.95*std::pow(s/GeV/GeV,-0.35)); // 40/32 X-dif/X-inel
260
261 SetAveragePt2(0.3); // GeV^2
262 };
263
264
265//G4cout<<"G4FTFParameters Out"<<G4endl;
266
267 }
268//**********************************************************************************************
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