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26 // 26 //
>> 27 // $Id: G4FTFAnnihilation.cc 91914 2015-08-11 07:00:39Z gcosmo $
27 // 28 //
28 29
29 // ------------------------------------------- 30 // ------------------------------------------------------------
30 // GEANT 4 class implemetation file 31 // GEANT 4 class implemetation file
31 // 32 //
32 // ---------------- G4FTFAnnihilation --- 33 // ---------------- G4FTFAnnihilation --------------
33 // by V. Uzhinsky, Spring 2011. 34 // by V. Uzhinsky, Spring 2011.
34 // Take a projectile and a targ 35 // Take a projectile and a target
35 // make annihilation or re-orangement o 36 // make annihilation or re-orangement of quarks and anti-quarks.
36 // Ideas of Quark-Gluon-String model my A. 37 // Ideas of Quark-Gluon-String model my A. Capella and A.B. Kaidalov
37 // are implemented. 38 // are implemented.
38 // ------------------------------------------- 39 // ---------------------------------------------------------------------
39 40
40 #include "globals.hh" 41 #include "globals.hh"
41 #include "Randomize.hh" 42 #include "Randomize.hh"
42 #include "G4PhysicalConstants.hh" 43 #include "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh" 44 #include "G4SystemOfUnits.hh"
44 45
45 #include "G4DiffractiveSplitableHadron.hh" 46 #include "G4DiffractiveSplitableHadron.hh"
46 #include "G4DiffractiveExcitation.hh" 47 #include "G4DiffractiveExcitation.hh"
47 #include "G4FTFParameters.hh" 48 #include "G4FTFParameters.hh"
48 #include "G4ElasticHNScattering.hh" 49 #include "G4ElasticHNScattering.hh"
49 #include "G4FTFAnnihilation.hh" 50 #include "G4FTFAnnihilation.hh"
50 51
51 #include "G4LorentzRotation.hh" 52 #include "G4LorentzRotation.hh"
52 #include "G4RotationMatrix.hh" 53 #include "G4RotationMatrix.hh"
53 #include "G4ThreeVector.hh" 54 #include "G4ThreeVector.hh"
54 #include "G4ParticleDefinition.hh" 55 #include "G4ParticleDefinition.hh"
55 #include "G4VSplitableHadron.hh" 56 #include "G4VSplitableHadron.hh"
56 #include "G4ExcitedString.hh" 57 #include "G4ExcitedString.hh"
57 #include "G4ParticleTable.hh" 58 #include "G4ParticleTable.hh"
58 #include "G4Neutron.hh" 59 #include "G4Neutron.hh"
59 #include "G4ParticleDefinition.hh" 60 #include "G4ParticleDefinition.hh"
60 61
61 #include "G4Exp.hh" 62 #include "G4Exp.hh"
62 #include "G4Log.hh" 63 #include "G4Log.hh"
63 #include "G4Pow.hh" 64 #include "G4Pow.hh"
64 65
>> 66 //#include "G4ios.hh"
65 //#include "UZHI_diffraction.hh" 67 //#include "UZHI_diffraction.hh"
66 68
67 #include "G4ParticleTable.hh" <<
68 69
69 //============================================ 70 //============================================================================
70 71
71 //#define debugFTFannih << 72 //define debugFTFannih
72 73
73 74
74 //============================================ 75 //============================================================================
75 76
76 G4FTFAnnihilation::G4FTFAnnihilation() {} 77 G4FTFAnnihilation::G4FTFAnnihilation() {}
77 78
78 79
79 //============================================ 80 //============================================================================
80 81
81 G4FTFAnnihilation::~G4FTFAnnihilation() {} 82 G4FTFAnnihilation::~G4FTFAnnihilation() {}
82 83
83 84
84 //============================================ 85 //============================================================================
85 86
86 G4bool G4FTFAnnihilation::Annihilate( G4VSplit 87 G4bool G4FTFAnnihilation::Annihilate( G4VSplitableHadron* projectile,
87 G4VSplit 88 G4VSplitableHadron* target,
88 G4VSplit 89 G4VSplitableHadron*& AdditionalString,
89 G4FTFPar 90 G4FTFParameters* theParameters ) const {
90 91
91 #ifdef debugFTFannih 92 #ifdef debugFTFannih
92 G4cout << "---------------------------- Anni 93 G4cout << "---------------------------- Annihilation----------------" << G4endl;
93 #endif 94 #endif
94 95
95 CommonVariables common; <<
96 <<
97 // Projectile parameters 96 // Projectile parameters
98 common.Pprojectile = projectile->Get4Momentu << 97 G4LorentzVector Pprojectile = projectile->Get4Momentum();
99 G4int ProjectilePDGcode = projectile->GetDef 98 G4int ProjectilePDGcode = projectile->GetDefinition()->GetPDGEncoding();
100 if ( ProjectilePDGcode > 0 ) { 99 if ( ProjectilePDGcode > 0 ) {
101 target->SetStatus( 3 ); << 100 target->SetStatus( 3 ); // 2->3 Uzhi Oct 2014
102 return false; 101 return false;
103 } 102 }
104 G4double M0projectile2 = common.Pprojectile. << 103 //G4double M0projectile = Pprojectile.mag();
>> 104 //G4double M0projectile2 = projectile->GetDefinition()->GetPDGMass() *
>> 105 // projectile->GetDefinition()->GetPDGMass();
>> 106 G4double M0projectile2 = Pprojectile.mag2();
105 107
106 // Target parameters 108 // Target parameters
107 G4int TargetPDGcode = target->GetDefinition( 109 G4int TargetPDGcode = target->GetDefinition()->GetPDGEncoding();
108 common.Ptarget = target->Get4Momentum(); << 110 G4LorentzVector Ptarget = target->Get4Momentum();
109 G4double M0target2 = common.Ptarget.mag2(); << 111 //G4double M0target = Ptarget.mag();
>> 112 //G4double M0target2 = target->GetDefinition()->GetPDGMass() *
>> 113 // target->GetDefinition()->GetPDGMass();
>> 114 G4double M0target2 = Ptarget.mag2();
110 115
111 #ifdef debugFTFannih 116 #ifdef debugFTFannih
112 G4cout << "PDG codes " << ProjectilePDGcode 117 G4cout << "PDG codes " << ProjectilePDGcode << " " << TargetPDGcode << G4endl
113 << "Pprojec " << common.Pprojectile < << 118 << "Pprojec " << Pprojectile << " " << Pprojectile.mag() << G4endl
114 << "Ptarget " << common.Ptarget << << 119 << "Ptarget " << Ptarget << " " << Ptarget.mag() << G4endl
115 << "M0 proj target " << std::sqrt( M0 120 << "M0 proj target " << std::sqrt( M0projectile2 )
116 << " " << std::sqrt( M0target2 ) << G 121 << " " << std::sqrt( M0target2 ) << G4endl;
117 #endif 122 #endif
118 123
>> 124 G4double AveragePt2 = theParameters->GetAveragePt2();
>> 125
119 // Kinematical properties of the interaction 126 // Kinematical properties of the interactions
120 G4LorentzVector Psum = common.Pprojectile + << 127 G4LorentzVector Psum; // 4-momentum in CMS
121 common.S = Psum.mag2(); << 128 Psum = Pprojectile + Ptarget;
122 common.SqrtS = std::sqrt( common.S ); << 129 G4double S = Psum.mag2();
>> 130
123 #ifdef debugFTFannih 131 #ifdef debugFTFannih
124 G4cout << "Psum SqrtS S " << Psum << " " << << 132 G4cout << "Psum SqrtS S " << Psum << " " << std::sqrt( S ) << " " << S << G4endl;
125 #endif 133 #endif
126 134
127 // Transform momenta to cms and then rotate 135 // Transform momenta to cms and then rotate parallel to z axis
128 G4LorentzRotation toCms( -1*Psum.boostVector 136 G4LorentzRotation toCms( -1*Psum.boostVector() );
129 G4LorentzVector Ptmp( toCms*common.Pprojecti << 137 G4LorentzVector Ptmp = toCms*Pprojectile;
130 toCms.rotateZ( -1*Ptmp.phi() ); 138 toCms.rotateZ( -1*Ptmp.phi() );
131 toCms.rotateY( -1*Ptmp.theta() ); 139 toCms.rotateY( -1*Ptmp.theta() );
132 common.toLab = toCms.inverse(); << 140 G4LorentzRotation toLab( toCms.inverse() );
133 <<
134 if ( G4UniformRand() <= G4Pow::GetInstance() <<
135 common.RotateStrings = true; <<
136 common.RandomRotation.rotateZ( 2.0*pi*G4Un <<
137 common.RandomRotation.rotateY( std::acos( <<
138 common.RandomRotation.rotateZ( 2.0*pi*G4Un <<
139 } <<
140 141
>> 142 G4double SqrtS = std::sqrt( S );
>> 143 G4double maxPtSquare;
>> 144 G4double X_a( 0.0 ), X_b( 0.0 ), X_c( 0.0 ), X_d( 0.0 );
141 G4double MesonProdThreshold = projectile->Ge 145 G4double MesonProdThreshold = projectile->GetDefinition()->GetPDGMass() +
142 target->GetDef 146 target->GetDefinition()->GetPDGMass() +
143 ( 2.0*140.0 + 147 ( 2.0*140.0 + 16.0 )*MeV; // 2 Mpi + DeltaE
144 G4double Prel2 = sqr(common.S) + sqr(M0proje << 148 G4double Prel2 = S*S + M0projectile2*M0projectile2 + M0target2*M0target2 -
145 - 2.0*( common.S*(M0project << 149 2.0*S*M0projectile2 - 2.0*S*M0target2 - 2.0*M0projectile2*M0target2;
146 Prel2 /= common.S; << 150 Prel2 /= S;
147 G4double X_a = 0.0, X_b = 0.0, X_c = 0.0, X_ << 151 //G4cout << "Prel2 " << Prel2 << G4endl;
148 if ( Prel2 <= 0.0 ) { << 152 if ( Prel2 <= 0.0 ) { // *MeV*MeV 1600.
149 // Annihilation at rest! Values are copied 153 // Annihilation at rest! Values are copied from Parameters
150 X_a = 625.1; // mb // 3-shirt diagram << 154 X_a = 625.1; // mb // 3-shirt diagram
151 X_b = 0.0; // mb // anti-quark-quark << 155 X_b = 0.0; // 9.780 12 Dec. 2012; // mb // anti-quark-quark annihilation
152 X_c = 49.989; // mb // 2 Q-Qbar string << 156 X_c = 49.989; // mb
153 X_d = 6.614; // mb // One Q-Qbar strin << 157 X_d = 6.614; // mb
>> 158
154 #ifdef debugFTFannih 159 #ifdef debugFTFannih
155 G4cout << "Annih at Rest X a b c d " << X_ 160 G4cout << "Annih at Rest X a b c d " << X_a << " " << X_b << " " << X_c << " " << X_d
156 << G4endl; 161 << G4endl;
157 #endif 162 #endif
>> 163
158 } else { // Annihilation in flight! 164 } else { // Annihilation in flight!
159 G4double FlowF = 1.0 / std::sqrt( Prel2 )* 165 G4double FlowF = 1.0 / std::sqrt( Prel2 )*GeV;
>> 166
160 // Process cross sections 167 // Process cross sections
161 X_a = 25.0*FlowF; // mb 3-shirt diagram 168 X_a = 25.0*FlowF; // mb 3-shirt diagram
162 if ( common.SqrtS < MesonProdThreshold ) { << 169 if ( SqrtS < MesonProdThreshold ) {
163 X_b = 3.13 + 140.0*G4Pow::GetInstance()- << 170 X_b = 3.13 + 140.0*G4Pow::GetInstance()->powA( ( MesonProdThreshold - SqrtS )/GeV, 2.5 );
164 } else { 171 } else {
165 X_b = 6.8*GeV / common.SqrtS; // mb ant << 172 X_b = 6.8*GeV / SqrtS; // mb anti-quark-quark annihilation
166 } 173 }
167 if ( projectile->GetDefinition()->GetPDGMa 174 if ( projectile->GetDefinition()->GetPDGMass() + target->GetDefinition()->GetPDGMass()
168 > common.SqrtS ) { << 175 > SqrtS ) {
169 X_b = 0.0; 176 X_b = 0.0;
170 } 177 }
171 // This can be in an interaction of low en 178 // This can be in an interaction of low energy anti-baryon with off-shell nuclear nucleon
172 X_c = 2.0 * FlowF * sqr( projectile->GetDe 179 X_c = 2.0 * FlowF * sqr( projectile->GetDefinition()->GetPDGMass() +
173 target->GetDefini << 180 target->GetDefinition()->GetPDGMass() ) / S; // mb re-arrangement of
174 << 181 // 2 quarks and 2 anti-quarks
175 X_d = 23.3*GeV*GeV / common.S; // mb anti- << 182 X_d = 23.3*GeV*GeV / S; // mb anti-quark-quark string creation
>> 183
176 #ifdef debugFTFannih 184 #ifdef debugFTFannih
177 G4cout << "Annih in Flight X a b c d " << 185 G4cout << "Annih in Flight X a b c d " << X_a << " " << X_b << " " << X_c << " " << X_d
178 << G4endl << "SqrtS MesonProdThresh << 186 << G4endl << "SqrtS MesonProdThreshold " << SqrtS << " " << MesonProdThreshold
179 << G4endl; 187 << G4endl;
180 #endif 188 #endif
>> 189
181 } 190 }
182 191
183 G4bool isUnknown = false; << 192 if ((ProjectilePDGcode == -2212 || ProjectilePDGcode == -2214)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
184 if ( TargetPDGcode == 2212 || TargetPDGcod << 193 X_b *= 5.0; X_c *= 5.0; X_d *= 6.0; // Pbar P
185 if ( ProjectilePDGcode == -2212 || << 194 } else if ((ProjectilePDGcode == -2212 || ProjectilePDGcode == -2214)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
186 X_b *= 5.0; X_c *= 5.0; X_d *= 6.0; // << 195 X_b *= 4.0; X_c *= 4.0; X_d *= 4.0; // Pbar N
187 } else if ( ProjectilePDGcode == -2112 || << 196 } else if ((ProjectilePDGcode == -2112 || ProjectilePDGcode == -2114)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
188 X_b *= 4.0; X_c *= 4.0; X_d *= 4.0; // << 197 X_b *= 4.0; X_c *= 4.0; X_d *= 4.0; // NeutrBar P
189 } else if ( ProjectilePDGcode == -3122 ) { << 198 } else if ((ProjectilePDGcode == -2112 || ProjectilePDGcode == -2114)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
190 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // << 199 X_b *= 5.0; X_c *= 5.0; X_d *= 6.0; // NeutrBar N
191 } else if ( ProjectilePDGcode == -3112 ) { << 200 } else if ((ProjectilePDGcode == -3122 || ProjectilePDGcode == -3124)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
192 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // << 201 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // LambdaBar P
193 } else if ( ProjectilePDGcode == -3212 ) { << 202 } else if ((ProjectilePDGcode == -3122 || ProjectilePDGcode == -3124)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
194 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // << 203 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // LambdaBar N
195 } else if ( ProjectilePDGcode == -3222 ) { << 204 } else if ((ProjectilePDGcode == -3112 || ProjectilePDGcode == -3114)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
196 X_b *= 4.0; X_c *= 4.0; X_d *= 2.0; // << 205 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // Sigma-Bar P
197 } else if ( ProjectilePDGcode == -3312 ) { << 206 } else if ((ProjectilePDGcode == -3112 || ProjectilePDGcode == -3114)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
198 X_b *= 1.0; X_c *= 1.0; X_d *= 0.0; // << 207 X_b *= 4.0; X_c *= 4.0; X_d *= 2.0; // Sigma-Bar N
199 } else if ( ProjectilePDGcode == -3322 ) { << 208 } else if ((ProjectilePDGcode == -3212 || ProjectilePDGcode == -3214)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
200 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // << 209 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // Sigma0Bar P
201 } else if ( ProjectilePDGcode == -3334 ) { << 210 } else if ((ProjectilePDGcode == -3212 || ProjectilePDGcode == -3214)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
202 X_b *= 0.0; X_c *= 0.0; X_d *= 0.0; // << 211 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // Sigma0Bar N
203 } else { << 212 } else if ((ProjectilePDGcode == -3222 || ProjectilePDGcode == -3224)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
204 isUnknown = true; << 213 X_b *= 4.0; X_c *= 4.0; X_d *= 2.0; // Sigma+Bar P
205 } << 214 } else if ((ProjectilePDGcode == -3222 || ProjectilePDGcode == -3224)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
206 } else if ( TargetPDGcode == 2112 || Targe << 215 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // Sigma+Bar N
207 if ( ProjectilePDGcode == -2212 || << 216 } else if ((ProjectilePDGcode == -3312 || ProjectilePDGcode == -3314)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
208 X_b *= 4.0; X_c *= 4.0; X_d *= 4.0; // << 217 X_b *= 1.0; X_c *= 1.0; X_d *= 0.0; // Xi-Bar P
209 } else if ( ProjectilePDGcode == -2112 || << 218 } else if ((ProjectilePDGcode == -3312 || ProjectilePDGcode == -3314)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
210 X_b *= 5.0; X_c *= 5.0; X_d *= 6.0; // << 219 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // Xi-Bar N
211 } else if ( ProjectilePDGcode == -3122 ) { << 220 } else if ((ProjectilePDGcode == -3322 || ProjectilePDGcode == -3324)&& ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
212 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // << 221 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // Xi0Bar P
213 } else if ( ProjectilePDGcode == -3112 ) { << 222 } else if ((ProjectilePDGcode == -3322 || ProjectilePDGcode == -3324)&& ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
214 X_b *= 4.0; X_c *= 4.0; X_d *= 2.0; // << 223 X_b *= 1.0; X_c *= 1.0; X_d *= 0.0; // Xi0Bar N
215 } else if ( ProjectilePDGcode == -3212 ) { << 224 } else if ( ProjectilePDGcode == -3334 && ( TargetPDGcode == 2212 || TargetPDGcode == 2214 ) ) {
216 X_b *= 3.0; X_c *= 3.0; X_d *= 2.0; // << 225 X_b *= 0.0; X_c *= 0.0; X_d *= 0.0; // Omega-Bar P
217 } else if ( ProjectilePDGcode == -3222 ) { << 226 } else if ( ProjectilePDGcode == -3334 && ( TargetPDGcode == 2112 || TargetPDGcode == 2114 ) ) {
218 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // << 227 X_b *= 0.0; X_c *= 0.0; X_d *= 0.0; // Omega-Bar N
219 } else if ( ProjectilePDGcode == -3312 ) { <<
220 X_b *= 2.0; X_c *= 2.0; X_d *= 0.0; // <<
221 } else if ( ProjectilePDGcode == -3322 ) { <<
222 X_b *= 1.0; X_c *= 1.0; X_d *= 0.0; // <<
223 } else if ( ProjectilePDGcode == -3334 ) { <<
224 X_b *= 0.0; X_c *= 0.0; X_d *= 0.0; // <<
225 } else { <<
226 isUnknown = true; <<
227 } <<
228 } else { 228 } else {
229 isUnknown = true; <<
230 } <<
231 if ( isUnknown ) { <<
232 G4cout << "Unknown anti-baryon for FTF ann 229 G4cout << "Unknown anti-baryon for FTF annihilation: PDGcodes - "
233 << ProjectilePDGcode << " " << Targ 230 << ProjectilePDGcode << " " << TargetPDGcode << G4endl;
234 } 231 }
235 232
236 #ifdef debugFTFannih 233 #ifdef debugFTFannih
237 G4cout << "Annih Actual X a b c d " << X_a < 234 G4cout << "Annih Actual X a b c d " << X_a << " " << X_b << " " << X_c << " " << X_d << G4endl;
238 #endif 235 #endif
239 236
240 G4double Xannihilation = X_a + X_b + X_c + X 237 G4double Xannihilation = X_a + X_b + X_c + X_d;
241 238
242 // Projectile unpacking 239 // Projectile unpacking
243 UnpackBaryon( ProjectilePDGcode, common.AQ[0 << 240 G4int AQ[3];
>> 241 UnpackBaryon( ProjectilePDGcode, AQ[0], AQ[1], AQ[2] );
244 242
245 // Target unpacking 243 // Target unpacking
246 UnpackBaryon( TargetPDGcode, common.Q[0], co << 244 G4int Q[3];
>> 245 UnpackBaryon( TargetPDGcode, Q[0], Q[1], Q[2] );
247 246
248 G4double Ksi = G4UniformRand(); 247 G4double Ksi = G4UniformRand();
249 248
250 if ( Ksi < X_a / Xannihilation ) { 249 if ( Ksi < X_a / Xannihilation ) {
251 return Create3QuarkAntiQuarkStrings( proje <<
252 } <<
253 <<
254 G4int resultCode = 99; <<
255 if ( Ksi < (X_a + X_b) / Xannihilation ) { <<
256 resultCode = Create1DiquarkAntiDiquarkStri <<
257 if ( resultCode == 0 ) { <<
258 return true; <<
259 } else if ( resultCode == 99 ) { <<
260 return false; <<
261 } <<
262 } <<
263 <<
264 if ( Ksi < ( X_a + X_b + X_c ) / Xannihilati <<
265 resultCode = Create2QuarkAntiQuarkStrings( <<
266 if ( resultCode == 0 ) { <<
267 return true; <<
268 } else if ( resultCode == 99 ) { <<
269 return false; <<
270 } <<
271 } <<
272 <<
273 if ( Ksi < ( X_a + X_b + X_c + X_d ) / Xanni <<
274 return Create1QuarkAntiQuarkString( projec <<
275 } <<
276 <<
277 return true; <<
278 } <<
279 <<
280 <<
281 //-------------------------------------------- <<
282 <<
283 G4bool G4FTFAnnihilation:: <<
284 Create3QuarkAntiQuarkStrings( G4VSplitableHadr <<
285 G4VSplitableHadr <<
286 G4VSplitableHadr <<
287 G4FTFParameters* <<
288 G4FTFAnnihilatio <<
289 // Simulation of 3 anti-quark - quark string <<
290 <<
291 #ifdef debugFTFannih <<
292 G4cout << "Process a, 3 shirt diagram" << G4 <<
293 #endif <<
294 250
295 // Sampling kinematical properties of quark. << 251 // Simulation of 3 anti-quark-quark strings creation
>> 252 // Sampling of anti-quark order in projectile
296 253
297 const G4int maxNumberOfLoops = 1000; << 254 #ifdef debugFTFannih
298 G4double MassQ2 = 0.0; // Simp << 255 G4cout << "Process a, 3 shirt diagram" << G4endl;
299 // In p << 256 #endif
300 G4double Quark_Xs[6]; <<
301 G4ThreeVector Quark_Mom[6]; <<
302 <<
303 G4double Alfa_R = 0.5; <<
304 G4double AveragePt2 = 200.0*200.0, maxPtSqua <<
305 G4double ScaleFactor = 1.0; <<
306 G4double Alfa = 0.0, Beta = 0.0; <<
307 <<
308 G4int NumberOfTries = 0, loopCounter = 0; <<
309 <<
310 do { <<
311 // Sampling X's of anti-baryon and baryon <<
312 G4double x1 = 0.0, x2 = 0.0, x3 = 0.0; <<
313 G4double Product = 1.0; <<
314 for ( G4int iCase = 0; iCase < 2; ++iCase <<
315 257
316 G4double r1 = G4UniformRand(), r2 = G4Un << 258 G4int SampledCase = G4RandFlat::shootInt( G4long( 6 ) );
317 if ( Alfa_R == 1.0 ) { <<
318 x1 = 1.0 - std::sqrt( r1 ); <<
319 x2 = (1.0 - x1) * r2; <<
320 } else { <<
321 x1 = sqr( r1 ); <<
322 x2 = (1.0 - x1) * sqr( std::sin( pi/2. <<
323 } <<
324 x3 = 1.0 - x1 - x2; <<
325 259
326 G4int index = iCase*3; // 0 for anti-ba << 260 G4int Tmp1( 0 ), Tmp2( 0 );
327 Quark_Xs[index] = x1; Quark_Xs[index+1] << 261 if ( SampledCase == 0 ) {
328 Product *= (x1*x2*x3); << 262 } else if ( SampledCase == 1 ) {
329 } << 263 Tmp1 = AQ[1]; AQ[1] = AQ[2]; AQ[2] = Tmp1;
>> 264 } else if ( SampledCase == 2 ) {
>> 265 Tmp1 = AQ[0]; AQ[0] = AQ[1]; AQ[1] = Tmp1;
>> 266 } else if ( SampledCase == 3 ) {
>> 267 Tmp1 = AQ[0]; Tmp2 = AQ[1]; AQ[0] = AQ[2]; AQ[1] = Tmp1; AQ[2] = Tmp2;
>> 268 } else if ( SampledCase == 4 ) {
>> 269 Tmp1 = AQ[0]; Tmp2 = AQ[1]; AQ[0] = Tmp2; AQ[1] = AQ[2]; AQ[2] = Tmp1;
>> 270 } else if ( SampledCase == 5 ) {
>> 271 Tmp1 = AQ[0]; Tmp2 = AQ[1]; AQ[0] = AQ[2]; AQ[1] = Tmp2; AQ[2] = Tmp1;
>> 272 }
330 273
331 if ( Product == 0.0 ) continue; << 274 // Set the string properties
332 275
333 ++NumberOfTries; << 276 //G4cout << "String 1 " << AQ[0] << " " << Q[0] << G4endl;
334 if ( NumberOfTries == 100*(NumberOfTries/1 << 277 projectile->SplitUp();
335 // After a large number of tries, it is << 278 projectile->SetFirstParton( AQ[0] );
336 ScaleFactor /= 2.0; << 279 projectile->SetSecondParton( Q[0] );
337 AveragePt2 *= ScaleFactor; << 280 projectile->SetStatus( 0 );
338 } <<
339 281
340 G4ThreeVector PtSum( 0.0, 0.0, 0.0 ); << 282 //G4cout << "String 2 " << Q[1] << " " << AQ[1] << G4endl;
341 for ( G4int i = 0; i < 6; ++i ) { << 283 target->SplitUp();
342 Quark_Mom [i] = GaussianPt( AveragePt2, << 284 target->SetFirstParton( Q[1] );
343 PtSum += Quark_Mom[i]; << 285 target->SetSecondParton( AQ[1] );
>> 286 target->SetStatus( 0 );
>> 287
>> 288 //G4cout << "String 3 " << AQ[2] << " " << Q[2] << G4endl;
>> 289 AdditionalString = new G4DiffractiveSplitableHadron();
>> 290 AdditionalString->SplitUp();
>> 291 AdditionalString->SetFirstParton( AQ[2] );
>> 292 AdditionalString->SetSecondParton( Q[2] );
>> 293 AdditionalString->SetStatus( 0 );
>> 294 //G4cout << G4endl << "*AdditionalString in Annih" << AdditionalString << G4endl;
>> 295
>> 296 // Sampling kinematical properties
>> 297 // 1 string AQ[0]-Q[0]// 2 string AQ[1]-Q[1]// 3 string AQ[2]-Q[2]
>> 298
>> 299 G4ThreeVector Quark_Mom[6];
>> 300 G4double ModMom2[6]; //ModMom[6]
>> 301
>> 302 AveragePt2 = 200.0*200.0; maxPtSquare = S;
>> 303
>> 304 G4double SumMt( 0.0 );
>> 305 G4double MassQ2 = 0.0; // 100.0*100.0*MeV*MeV;
>> 306 G4int NumberOfTries( 0 );
>> 307 G4double ScaleFactor( 1.0 );
>> 308
>> 309 const G4int maxNumberOfLoops = 1000;
>> 310 G4int loopCounter = 0;
>> 311 do {
>> 312 NumberOfTries++;
>> 313 if ( NumberOfTries == 100*(NumberOfTries/100) ) {
>> 314 // At large number of tries it would be better to reduce the values of <Pt^2>
>> 315 ScaleFactor /= 2.0;
>> 316 AveragePt2 *= ScaleFactor;
>> 317 }
>> 318 G4ThreeVector PtSum( 0.0, 0.0, 0.0 );
>> 319 for ( G4int i = 0; i < 6; i++ ) {
>> 320 Quark_Mom [i] = GaussianPt( AveragePt2, maxPtSquare );
>> 321 PtSum += Quark_Mom[i];
>> 322 }
>> 323 PtSum /= 6.0;
>> 324 SumMt = 0.0;
>> 325 for( G4int i = 0; i < 6; i++ ) {
>> 326 Quark_Mom[i] -= PtSum;
>> 327 //ModMom[i] = Quark_Mom[i].mag();
>> 328 ModMom2[i] = Quark_Mom[i].mag2();
>> 329 SumMt += std::sqrt( ModMom2[i] + MassQ2 );
>> 330 }
>> 331 } while ( ( SumMt > SqrtS ) &&
>> 332 ++loopCounter < maxNumberOfLoops ); /* Loop checking, 10.08.2015, A.Ribon */
>> 333 if ( loopCounter >= maxNumberOfLoops ) {
>> 334 return false;
344 } 335 }
345 336
346 PtSum /= 6.0; << 337 G4double WminusTarget( 0.0 ), WplusProjectile( 0.0 );
347 Alfa = 0.0; Beta = 0.0; <<
348 338
349 for ( G4int i = 0; i < 6; ++i ) { // Loop << 339 // Closed is variant with sampling of Xs at minimum
350 Quark_Mom[i] -= PtSum; << 340 //G4double SumMod_anti = ModMom[0] + ModMom[1] + ModMom[2];
351 << 341 //Quark_Mom[0].setZ( ModMom[0]/SumMod_anti );
352 G4double val = ( Quark_Mom[i].mag2() + M << 342 //Quark_Mom[1].setZ( ModMom[1]/SumMod_anti );
353 if ( i < 3 ) { // anti-baryon << 343 //Quark_Mom[2].setZ( ModMom[2]/SumMod_anti );
354 Alfa += val; << 344 //G4double SumMod_bary = ModMom[3] + ModMom[4] + ModMom[5];
355 } else { // baryon (iCase == 1) << 345 //Quark_Mom[3].setZ( ModMom[3]/SumMod_bary );
356 Beta += val; << 346 //Quark_Mom[4].setZ( ModMom[4]/SumMod_bary );
>> 347 //Quark_Mom[5].setZ( ModMom[5]/SumMod_bary );
>> 348 //G4double Alfa = SumMod_anti*SumMod_anti;
>> 349 //G4double Beta = SumMod_bary*SumMod_bary;
>> 350 //G4double DecayMomentum2 = S*S + Alfa*Alfa + Beta*Beta
>> 351 // - 2.0*S*Alfa - 2.0*S*Beta - 2.0*Alfa*Beta;
>> 352 //WminusTarget = ( S - Alfa + Beta + std::sqrt( DecayMomentum2 ) )/2.0/SqrtS;
>> 353 //WplusProjectile = SqrtS - Beta/WminusTarget;
>> 354 // Closed is variant with sampling of Xs at minimum
>> 355
>> 356 // Sampling X's of anti-baryon
>> 357 G4double Alfa_R = 0.5;
>> 358 NumberOfTries = 0;
>> 359 ScaleFactor = 1.0;
>> 360 G4bool Succes( true );
>> 361
>> 362 loopCounter = 0;
>> 363 do {
>> 364
>> 365 Succes = true;
>> 366 NumberOfTries++;
>> 367 if ( NumberOfTries == 100*(NumberOfTries/100) ) {
>> 368 // At large number of tries it would be better to reduce the values of Pt's
>> 369 ScaleFactor /= 2.0;
357 } 370 }
358 } <<
359 <<
360 } while ( ( std::sqrt( Alfa ) + std::sqrt( B <<
361 ++loopCounter < maxNumberOfLoops ) <<
362 371
363 if ( loopCounter >= maxNumberOfLoops ) { << 372 if ( Alfa_R == 1.0 ) {
364 return false; << 373 G4double Xaq1 = 1.0 - std::sqrt( G4UniformRand() );
365 } << 374 G4double Xaq2 = (1.0 - Xaq1) * G4UniformRand();
366 << 375 G4double Xaq3 = 1.0 - Xaq1 - Xaq2;
367 G4double DecayMomentum2 = sqr(common.S) + sq << 376 Quark_Mom[0].setZ( Xaq1 ); Quark_Mom[1].setZ( Xaq2 ); Quark_Mom[2].setZ( Xaq3 );
368 - 2.0*( common.S*( <<
369 <<
370 G4double WminusTarget = 0.0, WplusProjectile <<
371 WminusTarget = ( common.S - Alfa + Beta + st <<
372 WplusProjectile = common.SqrtS - Beta/Wminus <<
373 <<
374 for ( G4int iCase = 0; iCase < 2; ++iCase ) <<
375 G4int index = iCase*3; // <<
376 G4double w = WplusProjectile; // <<
377 if ( iCase == 1 ) w = - WminusTarget; // <<
378 for ( G4int i = 0; i < 3; ++i ) { <<
379 G4double Pz = w * Quark_Xs[index+i] / 2. <<
380 ( Quark_Mom[index+i].mag2( <<
381 ( 2.0 * w * Quark_Xs[index <<
382 Quark_Mom[index+i].setZ( Pz ); <<
383 } <<
384 } <<
385 <<
386 // Sampling of anti-quark order in projectil <<
387 G4int SampledCase = (G4int)G4RandFlat::shoot <<
388 G4int Tmp1 = 0, Tmp2 = 0; <<
389 switch ( SampledCase ) { <<
390 case 1 : Tmp1 = common.AQ[1]; common.AQ[1] <<
391 case 2 : Tmp1 = common.AQ[0]; common.AQ[0] <<
392 case 3 : Tmp1 = common.AQ[0]; Tmp2 <<
393 common.AQ[1] = Tmp1; comm <<
394 case 4 : Tmp1 = common.AQ[0]; Tmp2 <<
395 common.AQ[1] = common.AQ[2]; comm <<
396 case 5 : Tmp1 = common.AQ[0]; Tmp2 <<
397 common.AQ[1] = Tmp2; comm <<
398 } <<
399 <<
400 // Set the string properties <<
401 // An anti quark - quark pair can have the q <<
402 // or a vector meson: the last digit of the <<
403 // For simplicity only scalar is considered <<
404 G4int NewCode = 0, antiQuark = 0, quark = 0; <<
405 G4ParticleDefinition* TestParticle = nullptr <<
406 for ( G4int iString = 0; iString < 3; ++iStr <<
407 if ( iString == 0 ) { <<
408 antiQuark = common.AQ[0]; quark = commo <<
409 projectile->SetFirstParton( antiQuark ); <<
410 projectile->SetSecondParton( quark ); <<
411 projectile->SetStatus( 0 ); <<
412 } else if ( iString == 1 ) { <<
413 quark = common.Q[1]; antiQuark = common <<
414 target->SetFirstParton( quark ); <<
415 target->SetSecondParton( antiQuark ); <<
416 target->SetStatus( 0 ); <<
417 } else { // iString == 2 <<
418 antiQuark = common.AQ[2]; quark = commo <<
419 } <<
420 G4int absAntiQuark = std::abs( antiQuark ) <<
421 G4double aKsi = G4UniformRand(); <<
422 if ( absAntiQuark == absQuark ) { <<
423 if ( absAntiQuark != 3 ) { // Not yet c <<
424 NewCode = 111; // Pi0-meson <<
425 if ( aKsi < 0.5 ) { <<
426 NewCode = 221; // Eta -meso <<
427 if ( aKsi < 0.25 ) { <<
428 NewCode = 331; // Eta'-meso <<
429 } <<
430 } <<
431 } else { <<
432 NewCode = 221; // Eta -meso <<
433 if ( aKsi < 0.5 ) { <<
434 NewCode = 331; // Eta'-meso <<
435 } <<
436 } <<
437 } else { // Vector mesons - rho, omega, p <<
438 if ( absAntiQuark > absQuark ) { <<
439 NewCode = absAntiQuark*100 + absQuark* <<
440 } else { 377 } else {
441 NewCode = absQuark*100 + absAntiQuark* << 378 G4double Xaq1 = sqr( G4UniformRand() );
>> 379 G4double Xaq2 = (1.0 - Xaq1)*sqr( std::sin( pi/2.0*G4UniformRand() ) );
>> 380 G4double Xaq3 = 1.0 - Xaq1 - Xaq2;
>> 381 Quark_Mom[0].setZ( Xaq1 ); Quark_Mom[1].setZ( Xaq2 ); Quark_Mom[2].setZ( Xaq3 );
442 } 382 }
443 } <<
444 if ( iString == 2 ) AdditionalString = new <<
445 TestParticle = G4ParticleTable::GetParticl <<
446 if ( ! TestParticle ) return false; <<
447 if ( iString == 0 ) { <<
448 projectile->SetDefinition( TestParticle <<
449 theParameters->SetProjMinDiffMass( 0.5 ) <<
450 theParameters->SetProjMinNonDiffMass( 0. <<
451 } else if ( iString == 1 ) { <<
452 target->SetDefinition( TestParticle ); <<
453 theParameters->SetTarMinDiffMass( 0.5 ); <<
454 theParameters->SetTarMinNonDiffMass( 0.5 <<
455 } else { // iString == 2 <<
456 AdditionalString->SetDefinition( TestPar <<
457 AdditionalString->SetFirstParton( common <<
458 AdditionalString->SetSecondParton( commo <<
459 AdditionalString->SetStatus( 0 ); <<
460 } <<
461 } // End of the for loop over the 3 string <<
462 <<
463 // 1st string AQ[0]-Q[0], 2nd string AQ[1]-Q <<
464 383
465 G4LorentzVector Pstring1, Pstring2, Pstring3 << 384 // Sampling X's of baryon
466 G4int QuarkOrder[3] = { 0 }; << 385 if ( Alfa_R == 1.0 ) {
467 G4double YstringMax = 0.0, YstringMin = 0.0; << 386 G4double Xq1 = 1.0 - std::sqrt( G4UniformRand() );
468 for ( G4int i = 0; i < 3; ++i ) { << 387 G4double Xq2 = (1.0 - Xq1) * G4UniformRand();
469 G4ThreeVector tmp = Quark_Mom[i] + Quark_M << 388 G4double Xq3 = 1.0 - Xq1 - Xq2;
470 G4LorentzVector Pstring( tmp, std::sqrt( Q << 389 Quark_Mom[3].setZ( Xq1 ); Quark_Mom[4].setZ( Xq2 ); Quark_Mom[5].setZ( Xq3 );
471 std::sqrt( Q <<
472 // Add protection for rapidity = 0.5*ln( <<
473 G4double Ystring = 0.0; <<
474 if ( Pstring.e() > 1.0e-30 ) { <<
475 if ( Pstring.e() + Pstring.pz() < 1.0e-3 <<
476 Ystring = -1.0e30; // A very large n <<
477 if ( Pstring.e() - Pstring.pz() < 1.0e <<
478 Ystring = 1.0e30; // A very large p <<
479 } else { // Normal case <<
480 Ystring = Pstring.rapidity(); <<
481 } <<
482 } <<
483 } <<
484 // Keep ordering in rapidity: "1" highest, <<
485 if ( i == 0 ) { <<
486 Pstring1 = Pstring; YstringMax = Yst <<
487 QuarkOrder[0] = 0; <<
488 } else if ( i == 1 ) { <<
489 if ( Ystring > YstringMax ) { <<
490 Pstring2 = Pstring1; YstringMin = Yst <<
491 Pstring1 = Pstring; YstringMax = Yst <<
492 QuarkOrder[0] = 1; QuarkOrder[1] = 0; <<
493 } else { <<
494 Pstring2 = Pstring; YstringMin = Yst <<
495 QuarkOrder[1] = 1; <<
496 } <<
497 } else { // i == 2 <<
498 if ( Ystring > YstringMax ) { <<
499 Pstring3 = Pstring2; <<
500 Pstring2 = Pstring1; <<
501 Pstring1 = Pstring; <<
502 QuarkOrder[1] = QuarkOrder[0]; <<
503 QuarkOrder[2] = QuarkOrder[1]; <<
504 QuarkOrder[0] = 2; <<
505 } else if ( Ystring > YstringMin ) { <<
506 Pstring3 = Pstring2; <<
507 Pstring2 = Pstring; <<
508 } else { 390 } else {
509 Pstring3 = Pstring; << 391 G4double Xq1 = sqr( G4UniformRand() );
510 QuarkOrder[2] = 2; << 392 G4double Xq2 = (1.0 - Xq1) * sqr( std::sin( pi/2.0*G4UniformRand() ) );
>> 393 G4double Xq3 = 1.0 - Xq1 - Xq2;
>> 394 Quark_Mom[3].setZ( Xq1 ); Quark_Mom[4].setZ( Xq2 ); Quark_Mom[5].setZ( Xq3 );
511 } 395 }
512 } <<
513 } <<
514 <<
515 G4LorentzVector Quark_4Mom[6]; <<
516 for ( G4int i = 0; i < 6; ++i ) { <<
517 Quark_4Mom[i] = G4LorentzVector( Quark_Mom <<
518 if ( common.RotateStrings ) Quark_4Mom[i] <<
519 Quark_4Mom[i].transform( common.toLab ); <<
520 } <<
521 <<
522 projectile->Splitting(); <<
523 projectile->GetNextAntiParton()->Set4Momentu <<
524 projectile->GetNextParton()->Set4Momentum( Q <<
525 <<
526 target->Splitting(); <<
527 target->GetNextParton()->Set4Momentum( Quark <<
528 target->GetNextAntiParton()->Set4Momentum( Q <<
529 <<
530 AdditionalString->Splitting(); <<
531 AdditionalString->GetNextAntiParton()->Set4M <<
532 AdditionalString->GetNextParton()->Set4Momen <<
533 <<
534 common.Pprojectile = Pstring1; // <<
535 common.Ptarget = Pstring3; // <<
536 G4LorentzVector LeftString( Pstring2 ); // <<
537 <<
538 if ( common.RotateStrings ) { <<
539 common.Pprojectile *= common.RandomRotatio <<
540 common.Ptarget *= common.RandomRotatio <<
541 LeftString *= common.RandomRotatio <<
542 } <<
543 <<
544 common.Pprojectile.transform( common.toLab ) <<
545 common.Ptarget.transform( common.toLab ); <<
546 LeftString.transform( common.toLab ); <<
547 <<
548 // Calculation of the creation time <<
549 // Creation time and position of target nucl <<
550 projectile->SetTimeOfCreation( target->GetTi <<
551 projectile->SetPosition( target->GetPosition <<
552 AdditionalString->SetTimeOfCreation( target- <<
553 AdditionalString->SetPosition( target->GetPo <<
554 <<
555 projectile->Set4Momentum( common.Pprojectile <<
556 AdditionalString->Set4Momentum( LeftString ) <<
557 target->Set4Momentum( common.Ptarget ); <<
558 <<
559 projectile->IncrementCollisionCount( 1 ); <<
560 AdditionalString->IncrementCollisionCount( 1 <<
561 target->IncrementCollisionCount( 1 ); <<
562 396
563 return true; << 397 G4double Alfa( 0.0 ), Beta( 0.0 );
564 } << 398 for ( G4int i = 0; i < 3; i++ ) { // For Anti-baryon
565 << 399 if ( Quark_Mom[i].getZ() != 0.0 ) {
566 << 400 Alfa += ( ScaleFactor * ModMom2[i] + MassQ2 ) / Quark_Mom[i].getZ();
567 //-------------------------------------------- << 401 } else {
568 << 402 Succes = false;
569 G4int G4FTFAnnihilation:: << 403 }
570 Create1DiquarkAntiDiquarkString( G4VSplitableH << 404 }
571 G4VSplitableH << 405 for ( G4int i = 3; i < 6; i++ ) { // For baryon
572 G4FTFAnnihila << 406 if ( Quark_Mom[i].getZ() != 0.0 ) {
573 // Simulation of anti-diquark-diquark string << 407 Beta += ( ScaleFactor * ModMom2[i] + MassQ2 ) / Quark_Mom[i].getZ();
574 // This method returns an integer code - ins << 408 } else {
575 // "0" : successfully ended and nothing el << 409 Succes = false;
576 // "1" : successfully completed, but the w << 410 }
577 // "99" : unsuccessfully ended, nothing els << 411 }
578 412
579 #ifdef debugFTFannih << 413 if ( ! Succes ) continue;
580 G4cout << "Process b, quark - anti-quark ann <<
581 #endif <<
582 414
583 G4int CandidatsN = 0, CandAQ[9][2] = {}, Can << 415 if ( std::sqrt( Alfa ) + std::sqrt( Beta ) > SqrtS ) {
584 for ( G4int iAQ = 0; iAQ < 3; ++iAQ ) { // << 416 Succes = false;
585 for ( G4int iQ = 0; iQ < 3; ++iQ ) { // << 417 continue;
586 if ( -common.AQ[iAQ] == common.Q[iQ] ) { <<
587 // Here "0", "1", "2" means, respectiv <<
588 // of the (anti-baryon) projectile or <<
589 if ( iAQ == 0 ) { CandAQ[CandidatsN][0 <<
590 if ( iAQ == 1 ) { CandAQ[CandidatsN][0 <<
591 if ( iAQ == 2 ) { CandAQ[CandidatsN][0 <<
592 if ( iQ == 0 ) { CandQ[CandidatsN][0] <<
593 if ( iQ == 1 ) { CandQ[CandidatsN][0] <<
594 if ( iQ == 2 ) { CandQ[CandidatsN][0] <<
595 ++CandidatsN; <<
596 } 418 }
597 } <<
598 } <<
599 419
600 // Remaining two (anti-)quarks that form the << 420 G4double DecayMomentum2 = S*S + Alfa*Alfa + Beta*Beta
601 G4int LeftAQ1 = 0, LeftAQ2 = 0, LeftQ1 = 0, << 421 - 2.0*S*Alfa - 2.0*S*Beta - 2.0*Alfa*Beta;
602 if ( CandidatsN != 0 ) { << 422
603 G4int SampledCase = (G4int)G4RandFlat::sho << 423 WminusTarget = ( S - Alfa + Beta + std::sqrt( DecayMomentum2 ) ) / 2.0 / SqrtS;
604 LeftAQ1 = common.AQ[ CandAQ[SampledCase][0 << 424 WplusProjectile = SqrtS - Beta/WminusTarget;
605 LeftAQ2 = common.AQ[ CandAQ[SampledCase][1 <<
606 LeftQ1 = common.Q[ CandQ[SampledCase][0] <<
607 LeftQ2 = common.Q[ CandQ[SampledCase][1] <<
608 <<
609 // Build anti-diquark and diquark : the la <<
610 // of anti-quark - anti-quark and quark - <<
611 // or quarks are different. For simplicity <<
612 G4int Anti_DQ = 0, DQ = 0; <<
613 if ( std::abs( LeftAQ1 ) > std::abs( LeftA <<
614 Anti_DQ = 1000*LeftAQ1 + 100*LeftAQ2 - 3 <<
615 } else { <<
616 Anti_DQ = 1000*LeftAQ2 + 100*LeftAQ1 - 3 <<
617 } <<
618 if ( std::abs( LeftQ1 ) > std::abs( LeftQ2 <<
619 DQ = 1000*LeftQ1 + 100*LeftQ2 + 3; <<
620 } else { <<
621 DQ = 1000*LeftQ2 + 100*LeftQ1 + 3; <<
622 } <<
623 425
624 // Set the string properties << 426 } while ( ( ! Succes ) &&
625 projectile->SetFirstParton( DQ ); << 427 ++loopCounter < maxNumberOfLoops ); /* Loop checking, 10.08.2015, A.Ribon */
626 projectile->SetSecondParton( Anti_DQ ); << 428 if ( loopCounter >= maxNumberOfLoops ) {
627 << 429 return false;
628 // It is assumed that quark and di-quark m <<
629 G4LorentzVector Pquark = G4LorentzVector( <<
630 G4LorentzVector Paquark = G4LorentzVector( <<
631 <<
632 if ( common.RotateStrings ) { <<
633 Pquark *= common.RandomRotation; <<
634 Paquark *= common.RandomRotation; <<
635 } 430 }
636 431
637 Pquark.transform( common.toLab ); << 432 G4double SqrtScaleF = std::sqrt( ScaleFactor );
638 Paquark.transform( common.toLab ); << 433 for ( G4int i = 0; i < 3; i++ ) {
639 << 434 G4double Pz = WplusProjectile * Quark_Mom[i].getZ() / 2.0 -
640 projectile->GetNextParton()->Set4Momentum( << 435 ( ScaleFactor * ModMom2[i] + MassQ2 ) /
641 projectile->GetNextAntiParton()->Set4Momen << 436 ( 2.0 * WplusProjectile * Quark_Mom[i].getZ() );
642 << 437 Quark_Mom[i].setZ( Pz );
643 projectile->Splitting(); << 438 if ( ScaleFactor != 1.0 ) {
644 << 439 Quark_Mom[i].setX( SqrtScaleF * Quark_Mom[i].getX() );
645 projectile->SetStatus( 0 ); << 440 Quark_Mom[i].setY( SqrtScaleF * Quark_Mom[i].getY() );
646 target->SetStatus( 4 ); // The target nuc << 441 }
647 common.Pprojectile.setPx( 0.0 ); << 442 }
648 common.Pprojectile.setPy( 0.0 ); << 443 for ( G4int i = 3; i < 6; i++ ) {
649 common.Pprojectile.setPz( 0.0 ); << 444 G4double Pz = -WminusTarget * Quark_Mom[i].getZ() / 2.0 +
650 common.Pprojectile.setE( common.SqrtS ); << 445 ( ScaleFactor * ModMom2[i] + MassQ2 ) /
651 common.Pprojectile.transform( common.toLab << 446 ( 2.0 * WminusTarget * Quark_Mom[i].getZ() );
>> 447 Quark_Mom[i].setZ( Pz );
>> 448 if ( ScaleFactor != 1.0 ) {
>> 449 Quark_Mom[i].setX( SqrtScaleF * Quark_Mom[i].getX() );
>> 450 Quark_Mom[i].setY( SqrtScaleF * Quark_Mom[i].getY() );
>> 451 }
>> 452 }
>> 453 //G4cout << "Sum AQ " << Quark_Mom[0] + Quark_Mom[1] + Quark_Mom[2] << G4endl
>> 454 // << "Sum Q " << Quark_Mom[3] + Quark_Mom[4] + Quark_Mom[5] << G4endl;
>> 455
>> 456 G4ThreeVector tmp = Quark_Mom[0] + Quark_Mom[3];
>> 457 G4LorentzVector Pstring1( tmp, std::sqrt( Quark_Mom[0].mag2() + MassQ2 ) +
>> 458 std::sqrt( Quark_Mom[3].mag2() + MassQ2 ) );
>> 459 G4double Ystring1 = Pstring1.rapidity();
>> 460
>> 461 //G4cout << "Mom 1 string " << G4endl << Quark_Mom[0] << G4endl << Quark_Mom[3] << G4endl
>> 462 // << tmp << " " << tmp.mag() << G4endl;
>> 463 //G4cout << "1 str " << Pstring1 << " " << Pstring1.mag() << " " << Ystring1 << G4endl;
>> 464
>> 465 tmp = Quark_Mom[1] + Quark_Mom[4];
>> 466 G4LorentzVector Pstring2( tmp, std::sqrt( Quark_Mom[1].mag2() + MassQ2 ) +
>> 467 std::sqrt( Quark_Mom[4].mag2() + MassQ2 ) );
>> 468 G4double Ystring2 = Pstring2.rapidity();
>> 469
>> 470 //G4cout << "Mom 2 string " << G4endl << Quark_Mom[1] << G4endl << Quark_Mom[4] << G4endl
>> 471 // << tmp << " " << tmp.mag() << G4endl;
>> 472 //G4cout << "2 str " << Pstring2 << " " << Pstring2.mag() << " " << Ystring2 << G4endl;
>> 473
>> 474 tmp = Quark_Mom[2] + Quark_Mom[5];
>> 475 G4LorentzVector Pstring3( tmp, std::sqrt( Quark_Mom[2].mag2() + MassQ2 ) +
>> 476 std::sqrt( Quark_Mom[5].mag2() + MassQ2 ) );
>> 477 G4double Ystring3 = Pstring3.rapidity();
>> 478
>> 479 //G4cout << "Mom 3 string " << G4endl << Quark_Mom[2] << G4endl << Quark_Mom[5] << G4endl
>> 480 // << tmp << " " << tmp.mag() << G4endl;
>> 481 //G4cout << "3 str " << Pstring3 << " " << Pstring3.mag() << " " << Ystring3 << G4endl
>> 482 // << "SumE " << Pstring1.e() + Pstring2.e() + Pstring3.e() << G4endl
>> 483 // << Pstring1.mag() << " " <<Pstring2.mag() << " " << Pstring3.mag() << G4endl;
>> 484 //G4int Uzhi; G4cin >> Uzhi;
>> 485
>> 486 G4LorentzVector LeftString( 0.0, 0.0, 0.0, 0.0 );
>> 487 if ( Ystring1 > Ystring2 && Ystring2 > Ystring3 ) {
>> 488 Pprojectile = Pstring1;
>> 489 LeftString = Pstring2;
>> 490 Ptarget = Pstring3;
>> 491 }
>> 492 if ( Ystring1 > Ystring3 && Ystring3 > Ystring2 ) {
>> 493 Pprojectile = Pstring1;
>> 494 LeftString = Pstring3;
>> 495 Ptarget = Pstring2;
>> 496 }
>> 497
>> 498 if ( Ystring2 > Ystring1 && Ystring1 > Ystring3 ) {
>> 499 Pprojectile = Pstring2;
>> 500 LeftString = Pstring1;
>> 501 Ptarget = Pstring3;
>> 502 }
>> 503 if ( Ystring2 > Ystring3 && Ystring3 > Ystring1 ) {
>> 504 Pprojectile = Pstring2;
>> 505 LeftString = Pstring3;
>> 506 Ptarget = Pstring1;
>> 507 }
>> 508
>> 509 if ( Ystring3 > Ystring1 && Ystring1 > Ystring2 ) {
>> 510 Pprojectile = Pstring3;
>> 511 LeftString = Pstring1;
>> 512 Ptarget = Pstring2;
>> 513 }
>> 514 if ( Ystring3 > Ystring2 && Ystring2 > Ystring1 ) {
>> 515 Pprojectile = Pstring3;
>> 516 LeftString = Pstring2;
>> 517 Ptarget = Pstring1;
>> 518 }
>> 519 //G4cout << "SumP " << Pprojectile + LeftString + Ptarget << " " << SqrtS << G4endl;
>> 520
>> 521 Pprojectile.transform( toLab );
>> 522 LeftString.transform( toLab );
>> 523 Ptarget.transform( toLab );
>> 524 //G4cout << "SumP " << Pprojectile + LeftString + Ptarget << " " << SqrtS << G4endl;
652 525
653 // Calculation of the creation time 526 // Calculation of the creation time
654 // Creation time and position of target nu <<
655 projectile->SetTimeOfCreation( target->Get 527 projectile->SetTimeOfCreation( target->GetTimeOfCreation() );
656 projectile->SetPosition( target->GetPositi 528 projectile->SetPosition( target->GetPosition() );
657 projectile->Set4Momentum( common.Pprojecti << 529 AdditionalString->SetTimeOfCreation( target->GetTimeOfCreation() );
658 << 530 AdditionalString->SetPosition( target->GetPosition() );
>> 531 // Creation time and position of target nucleon were determined in
>> 532 // ReggeonCascade() of G4FTFModel
>> 533
>> 534 //G4cout << "Mproj " << Pprojectile.mag() << G4endl << "Mtarg " << Ptarget.mag() << G4endl;
>> 535 projectile->Set4Momentum( Pprojectile );
>> 536 AdditionalString->Set4Momentum( LeftString );
>> 537 target->Set4Momentum( Ptarget );
659 projectile->IncrementCollisionCount( 1 ); 538 projectile->IncrementCollisionCount( 1 );
>> 539 AdditionalString->IncrementCollisionCount( 1 );
660 target->IncrementCollisionCount( 1 ); 540 target->IncrementCollisionCount( 1 );
661 541
662 return 0; // Completed successfully: noth << 542 return true;
663 } // End of if ( CandidatsN != 0 ) <<
664 543
665 // If we allow the string to interact with o << 544 } // End of if ( Ksi < X_a / Xannihilation )
666 // set up MinDiffrMass in Parameters, and as <<
667 <<
668 return 1; // Successfully ended, but the wo <<
669 } <<
670 545
>> 546 // Simulation of anti-diquark-diquark string creation
671 547
672 //-------------------------------------------- << 548 if ( Ksi < (X_a + X_b) / Xannihilation ) {
673 549
674 G4int G4FTFAnnihilation:: << 550 #ifdef debugFTFannih
675 Create2QuarkAntiQuarkStrings( G4VSplitableHadr << 551 G4cout << "Process b, quark - anti-quark annihilation, di-q - anti-di-q string" << G4endl;
676 G4VSplitableHadr << 552 #endif
677 G4FTFParameters* <<
678 G4FTFAnnihilatio <<
679 // Simulation of 2 anti-quark-quark strings <<
680 // This method returns an integer code - ins <<
681 // "0" : successfully ended and nothing el <<
682 // "1" : successfully completed, but the w <<
683 // "99" : unsuccessfully ended, nothing els <<
684 553
685 #ifdef debugFTFannih << 554 G4int CandidatsN( 0 ), CandAQ[9][2], CandQ[9][2];
686 G4cout << "Process c, quark - anti-quark and << 555 G4int LeftAQ1( 0 ), LeftAQ2( 0 ), LeftQ1( 0 ), LeftQ2( 0 );
687 << G4endl; <<
688 #endif <<
689 556
690 // Sampling kinematical properties: 1st stri << 557 for ( G4int iAQ = 0; iAQ < 3; iAQ++ ) {
691 G4ThreeVector Quark_Mom[4]; << 558 for ( G4int iQ = 0; iQ < 3; iQ++ ) {
692 G4double Quark_Xs[4]; << 559 if ( -AQ[iAQ] == Q[iQ] ) {
693 G4double AveragePt2 = 200.0*200.0, maxPtSqua << 560 if ( iAQ == 0 ) { CandAQ[CandidatsN][0] = 1; CandAQ[CandidatsN][1] = 2; }
694 G4int NumberOfTries = 0, loopCounter = 0; << 561 if ( iAQ == 1 ) { CandAQ[CandidatsN][0] = 0; CandAQ[CandidatsN][1] = 2; }
695 const G4int maxNumberOfLoops = 1000; << 562 if ( iAQ == 2 ) { CandAQ[CandidatsN][0] = 0; CandAQ[CandidatsN][1] = 1; }
696 G4double Alfa = 0.0, Beta = 0.0; << 563 if ( iQ == 0 ) { CandQ[CandidatsN][0] = 1; CandQ[CandidatsN][1] = 2; }
697 G4double WminusTarget = 0.0, WplusProjectile << 564 if ( iQ == 1 ) { CandQ[CandidatsN][0] = 0; CandQ[CandidatsN][1] = 2; }
698 do { << 565 if ( iQ == 2 ) { CandQ[CandidatsN][0] = 0; CandQ[CandidatsN][1] = 1; }
699 // Sampling X's of the 2 quarks and 2 anti << 566 CandidatsN++;
700 <<
701 G4double Product = 1.0; <<
702 for ( G4int iCase = 0; iCase < 2; ++iCase <<
703 G4double x = 0.0, r = G4UniformRand(); <<
704 if ( Alfa_R == 1.0 ) { <<
705 if ( iCase == 0 ) { // first string <<
706 x = std::sqrt( r ); <<
707 } else { // second string <<
708 x = 1.0 - std::sqrt( r ); <<
709 } 567 }
710 } else { <<
711 x = sqr( std::sin( pi/2.0*r ) ); <<
712 } 568 }
713 G4int index = iCase*2; // 0 for the fir <<
714 Quark_Xs[index] = x ; Quark_Xs[index+1] <<
715 Product *= x*(1.0-x); <<
716 } 569 }
>> 570 //G4cout << "CandidatsN " << CandidatsN << G4endl;
717 571
718 if ( Product == 0.0 ) continue; << 572 if ( CandidatsN != 0 ) {
>> 573 G4int SampledCase = G4RandFlat::shootInt( G4long( CandidatsN ) );
>> 574 LeftAQ1 = AQ[ CandAQ[SampledCase][0] ];
>> 575 LeftAQ2 = AQ[ CandAQ[SampledCase][1] ];
>> 576 LeftQ1 = Q[ CandQ[SampledCase][0] ];
>> 577 LeftQ2 = Q[ CandQ[SampledCase][1] ];
>> 578
>> 579 // Build anti-diquark and diquark
>> 580 G4int Anti_DQ( 0 ), DQ( 0 );
>> 581 if ( std::abs( LeftAQ1 ) > std::abs( LeftAQ2 ) ) {
>> 582 Anti_DQ = 1000*LeftAQ1 + 100*LeftAQ2 - 3; // 1
>> 583 } else {
>> 584 Anti_DQ = 1000*LeftAQ2 + 100*LeftAQ1 - 3; // 1
>> 585 }
>> 586 //if ( G4UniformRand() > 0.5 ) Anti_DQ -= 2;
>> 587 if ( std::abs( LeftQ1 ) > std::abs( LeftQ2 ) ) {
>> 588 DQ = 1000*LeftQ1 + 100*LeftQ2 + 3; // 1
>> 589 } else {
>> 590 DQ = 1000*LeftQ2 + 100*LeftQ1 + 3; // 1
>> 591 }
>> 592 // if ( G4UniformRand() > 0.5 ) DQ += 2;
719 593
720 ++NumberOfTries; << 594 // Set the string properties
721 if ( NumberOfTries == 100*(NumberOfTries/1 << 595 //G4cout << "Left ADiQ DiQ " << Anti_DQ << " " << DQ << G4endl;
722 // After a large number of tries, it is << 596 projectile->SplitUp();
723 ScaleFactor /= 2.0; << 597 //projectile->SetFirstParton( Anti_DQ );
724 AveragePt2 *= ScaleFactor; << 598 //projectile->SetSecondParton( DQ );
725 } << 599 projectile->SetFirstParton( DQ );
>> 600 projectile->SetSecondParton( Anti_DQ );
>> 601 projectile->SetStatus( 0 );
>> 602 target->SetStatus( 4 ); // The target nucleon has annihilated 3->4 Uzhi Oct 2014
>> 603 Pprojectile.setPx( 0.0 );
>> 604 Pprojectile.setPy( 0.0 );
>> 605 Pprojectile.setPz( 0.0 );
>> 606 Pprojectile.setE( SqrtS );
>> 607 Pprojectile.transform( toLab );
>> 608
>> 609 // Calculation of the creation time
>> 610 projectile->SetTimeOfCreation( target->GetTimeOfCreation() );
>> 611 projectile->SetPosition( target->GetPosition() );
>> 612 // Creation time and position of target nucleon were determined in
>> 613 // ReggeonCascade() of G4FTFModel
>> 614
>> 615 //G4cout << "Mproj " << Pprojectile.mag() << G4endl
>> 616 // << "Mtarg " << Ptarget.mag() << G4endl;
>> 617 projectile->Set4Momentum( Pprojectile );
726 618
727 G4ThreeVector PtSum( 0.0, 0.0, 0.0 ); << 619 projectile->IncrementCollisionCount( 1 );
728 for( G4int i = 0; i < 4; ++i ) { << 620 target->IncrementCollisionCount( 1 );
729 Quark_Mom[i] = GaussianPt( AveragePt2, m <<
730 PtSum += Quark_Mom[i]; <<
731 } <<
732 621
733 PtSum /= 4.0; << 622 return true;
734 for ( G4int i = 0; i < 4; ++i ) { <<
735 Quark_Mom[i] -= PtSum; <<
736 } 623 }
737 624
738 Alfa = 0.0; Beta = 0.0; << 625 } // End of if ( Ksi < (X_a + X_b) / Xannihilation )
739 for ( G4int iCase = 0; iCase < 2; ++iCase <<
740 G4int index = iCase * 2; <<
741 for ( G4int i = 0; i < 2; ++i ) { <<
742 G4double val = ( Quark_Mom[index+i]. <<
743 if ( iCase == 0 ) { // first string <<
744 Alfa += val; <<
745 } else { // second strin <<
746 Beta += val; <<
747 } <<
748 } <<
749 } <<
750 626
751 } while ( ( std::sqrt( Alfa ) + std::sqrt( B << 627 if ( Ksi < ( X_a + X_b + X_c ) / Xannihilation ) {
752 ++loopCounter < maxNumberOfLoops ) <<
753 628
754 if ( loopCounter >= maxNumberOfLoops ) { << 629 // Simulation of 2 anti-quark-quark strings creation
755 return 99; // unsuccessfully ended, nothi <<
756 } <<
757 630
758 G4double DecayMomentum2 = sqr(common.S) + sq << 631 #ifdef debugFTFannih
759 - 2.0*( common.S*( << 632 G4cout << "Process c, quark - anti-quark and string junctions annihilation, 2 strings left."
760 WminusTarget = ( common.S - Alfa + Beta + st << 633 << G4endl;
761 WplusProjectile = common.SqrtS - Beta/Wminus << 634 #endif
762 <<
763 for ( G4int iCase = 0; iCase < 2; ++iCase ) <<
764 G4int index = iCase*2; // 0 for the first <<
765 for ( G4int i = 0; i < 2; ++i ) { <<
766 G4double w = WplusProjectile; / <<
767 if ( iCase == 1 ) w = - WminusTarget; / <<
768 G4double Pz = w * Quark_Xs[index+i] / 2. <<
769 - ( Quark_Mom[index+i].mag <<
770 ( 2.0 * w * Quark_Xs[ind <<
771 Quark_Mom[index+i].setZ( Pz ); <<
772 } <<
773 } <<
774 635
775 G4int CandidatsN = 0, CandAQ[9][2] = {}, Can << 636 G4int CandidatsN( 0 ), CandAQ[9][2], CandQ[9][2];
776 G4int LeftAQ1 = 0, LeftAQ2 = 0, LeftQ1 = 0, << 637 G4int LeftAQ1( 0 ), LeftAQ2( 0 ), LeftQ1( 0 ), LeftQ2( 0 );
777 for ( G4int iAQ = 0; iAQ < 3; ++iAQ ) { // <<
778 for ( G4int iQ = 0; iQ < 3; ++iQ ) { // <<
779 if ( -common.AQ[iAQ] == common.Q[iQ] ) { <<
780 // Here "0", "1", "2" means, respectiv <<
781 // of the (anti-baryon) projectile or <<
782 if ( iAQ == 0 ) { CandAQ[CandidatsN][0 <<
783 if ( iAQ == 1 ) { CandAQ[CandidatsN][0 <<
784 if ( iAQ == 2 ) { CandAQ[CandidatsN][0 <<
785 if ( iQ == 0 ) { CandQ[CandidatsN][0] <<
786 if ( iQ == 1 ) { CandQ[CandidatsN][0] <<
787 if ( iQ == 2 ) { CandQ[CandidatsN][0] <<
788 ++CandidatsN; <<
789 } <<
790 } <<
791 } <<
792 638
793 if ( CandidatsN != 0 ) { << 639 for ( G4int iAQ = 0; iAQ < 3; iAQ++ ) {
794 G4int SampledCase = (G4int)G4RandFlat::sho << 640 for ( G4int iQ = 0; iQ < 3; iQ++ ) {
795 LeftAQ1 = common.AQ[ CandAQ[SampledCase][0 << 641 if ( -AQ[iAQ] == Q[iQ] ) {
796 LeftAQ2 = common.AQ[ CandAQ[SampledCase][1 << 642 if ( iAQ == 0 ) { CandAQ[CandidatsN][0] = 1; CandAQ[CandidatsN][1] = 2; }
797 if ( G4UniformRand() < 0.5 ) { << 643 if ( iAQ == 1 ) { CandAQ[CandidatsN][0] = 0; CandAQ[CandidatsN][1] = 2; }
798 LeftQ1 = common.Q[ CandQ[SampledCase][0] << 644 if ( iAQ == 2 ) { CandAQ[CandidatsN][0] = 0; CandAQ[CandidatsN][1] = 1; }
799 LeftQ2 = common.Q[ CandQ[SampledCase][1] << 645 if ( iQ == 0 ) { CandQ[CandidatsN][0] = 1; CandQ[CandidatsN][1] = 2; }
800 } else { << 646 if ( iQ == 1 ) { CandQ[CandidatsN][0] = 0; CandQ[CandidatsN][1] = 2; }
801 LeftQ2 = common.Q[ CandQ[SampledCase][0] << 647 if ( iQ == 2 ) { CandQ[CandidatsN][0] = 0; CandQ[CandidatsN][1] = 1; }
802 LeftQ1 = common.Q[ CandQ[SampledCase][1] << 648 CandidatsN++;
>> 649 }
>> 650 }
803 } 651 }
>> 652 //G4cout << "CandidatsN " << CandidatsN << G4endl;
804 653
805 // Set the string properties << 654 if ( CandidatsN != 0 ) {
806 // An anti quark - quark pair can have the << 655 G4int SampledCase = G4RandFlat::shootInt( G4long( CandidatsN ) );
807 // or a vector meson: the last digit of th << 656 LeftAQ1 = AQ[ CandAQ[SampledCase][0] ];
808 // For simplicity only scalar is considere << 657 LeftAQ2 = AQ[ CandAQ[SampledCase][1] ];
809 G4int NewCode = 0, antiQuark = 0, quark = << 658 if ( G4UniformRand() < 0.5 ) {
810 G4ParticleDefinition* TestParticle = nullp << 659 LeftQ1 = Q[ CandQ[SampledCase][0] ];
811 for ( G4int iString = 0; iString < 2; ++iS << 660 LeftQ2 = Q[ CandQ[SampledCase][1] ];
812 if ( iString == 0 ) { << 661 } else {
813 antiQuark = LeftAQ1; quark = LeftQ1; << 662 LeftQ2 = Q[ CandQ[SampledCase][0] ];
814 projectile->SetFirstParton( antiQuark << 663 LeftQ1 = Q[ CandQ[SampledCase][1] ];
815 projectile->SetSecondParton( quark ); <<
816 projectile->SetStatus( 0 ); <<
817 } else { // iString == 1 <<
818 quark = LeftQ2; antiQuark = LeftAQ2; <<
819 target->SetFirstParton( quark ); <<
820 target->SetSecondParton( antiQuark ); <<
821 target->SetStatus( 0 ); <<
822 } 664 }
823 G4int absAntiQuark = std::abs( antiQuark << 665
824 G4double aKsi = G4UniformRand(); << 666 // Set the string properties
825 if ( absAntiQuark == absQuark ) { << 667 //G4cout << "String 1 " << LeftAQ1 << " " << LeftQ1 << G4endl;
826 if ( absAntiQuark != 3 ) { << 668 projectile->SplitUp();
827 NewCode = 111; // Pi0-meson << 669 projectile->SetFirstParton( LeftAQ1 );
828 if ( aKsi < 0.5 ) { << 670 projectile->SetSecondParton( LeftQ1 );
829 NewCode = 221; // Eta -meso << 671 projectile->SetStatus( 0 );
830 if ( aKsi < 0.25 ) { << 672 //G4cout << "String 2 " << LeftAQ2 << " " << LeftQ2 << G4endl;
831 NewCode = 331; // Eta'-meso << 673 target->SplitUp();
832 } << 674 target->SetFirstParton( LeftQ2 );
833 } << 675 target->SetSecondParton( LeftAQ2 );
>> 676 target->SetStatus( 0 );
>> 677
>> 678 // Sampling kinematical properties
>> 679 // 1 string LeftAQ1-LeftQ1// 2 string LeftAQ2-LeftQ2
>> 680 G4ThreeVector Quark_Mom[4];
>> 681 G4double ModMom2[4]; //ModMom[4],
>> 682
>> 683 AveragePt2 = 200.0*200.0; maxPtSquare = S;
>> 684
>> 685 G4double SumMt( 0.0 );
>> 686 G4double MassQ2 = 0.0; //100.0*100.0*MeV*MeV;
>> 687 G4int NumberOfTries( 0 );
>> 688 G4double ScaleFactor( 1.0 );
>> 689
>> 690 const G4int maxNumberOfLoops = 1000;
>> 691 G4int loopCounter = 0;
>> 692 do {
>> 693 NumberOfTries++;
>> 694 if ( NumberOfTries == 100*(NumberOfTries/100) ) {
>> 695 // At large number of tries it would be better to reduce the values of <Pt^2>
>> 696 ScaleFactor /= 2.0;
>> 697 AveragePt2 *= ScaleFactor;
>> 698 }
>> 699 G4ThreeVector PtSum( 0.0, 0.0, 0.0 );
>> 700 for( G4int i = 0; i < 4; i++ ) {
>> 701 Quark_Mom[i] = GaussianPt( AveragePt2, maxPtSquare );
>> 702 PtSum += Quark_Mom[i];
>> 703 }
>> 704 PtSum /= 4.0;
>> 705 SumMt = 0.0;
>> 706 for ( G4int i = 0; i < 4; i++ ) {
>> 707 Quark_Mom[i] -= PtSum;
>> 708 //ModMom[i] = Quark_Mom[i].mag();
>> 709 ModMom2[i] = Quark_Mom[i].mag2();
>> 710 SumMt += std::sqrt( ModMom2[i] + MassQ2 );
>> 711 }
>> 712 } while ( ( SumMt > SqrtS ) &&
>> 713 ++loopCounter < maxNumberOfLoops ); /* Loop checking, 10.08.2015, A.Ribon */
>> 714 if ( loopCounter >= maxNumberOfLoops ) {
>> 715 return false;
>> 716 }
>> 717
>> 718 G4double WminusTarget( 0.0 ), WplusProjectile( 0.0 );
>> 719
>> 720 // Sampling X's of anti-baryon
>> 721 G4double Alfa_R = 0.5;
>> 722 NumberOfTries = 0;
>> 723 ScaleFactor = 1.0;
>> 724 G4bool Succes( true );
>> 725
>> 726 loopCounter = 0;
>> 727 do {
>> 728
>> 729 Succes = true;
>> 730 NumberOfTries++;
>> 731 if ( NumberOfTries == 100*(NumberOfTries/100) ) {
>> 732 // At large number of tries it would be better to reduce the values of Pt's
>> 733 ScaleFactor /= 2.0;
>> 734 }
>> 735
>> 736 if ( Alfa_R == 1.0 ) {
>> 737 G4double Xaq1 = std::sqrt( G4UniformRand() );
>> 738 G4double Xaq2 = 1.0 - Xaq1;
>> 739 Quark_Mom[0].setZ( Xaq1 ); Quark_Mom[1].setZ( Xaq2 );
834 } else { 740 } else {
835 NewCode = 221; // Eta -meso << 741 G4double Xaq1 = sqr( std::sin( pi/2.0*G4UniformRand() ) );
836 if ( aKsi < 0.5 ) { << 742 G4double Xaq2 = 1.0 - Xaq1;
837 NewCode = 331; // Eta'-meso << 743 Quark_Mom[0].setZ( Xaq1 ); Quark_Mom[1].setZ( Xaq2 );
838 } <<
839 } 744 }
840 } else { << 745
841 if ( absAntiQuark > absQuark ) { << 746 // Sampling X's of baryon ------------
842 NewCode = absAntiQuark*100 + absQuar << 747 if ( Alfa_R == 1.0 ) {
843 } else { << 748 G4double Xq1 = 1.0 - std::sqrt( G4UniformRand() );
844 NewCode = absQuark*100 + absAntiQuar << 749 G4double Xq2 = 1.0 - Xq1;
>> 750 Quark_Mom[2].setZ( Xq1 ); Quark_Mom[3].setZ( Xq2 );
>> 751 } else {
>> 752 G4double Xq1 = sqr( std::sin( pi/2.0*G4UniformRand() ) );
>> 753 G4double Xq2 = 1.0 - Xq1;
>> 754 Quark_Mom[2].setZ( Xq1 ); Quark_Mom[3].setZ( Xq2 );
845 } 755 }
846 } <<
847 TestParticle = G4ParticleTable::GetParti <<
848 if ( ! TestParticle ) return 99; // uns <<
849 if ( iString == 0 ) { <<
850 projectile->SetDefinition( TestParticl <<
851 theParameters->SetProjMinDiffMass( 0.5 <<
852 theParameters->SetProjMinNonDiffMass( <<
853 } else { // iString == 1 <<
854 target->SetDefinition( TestParticle ); <<
855 theParameters->SetTarMinDiffMass( 0.5 <<
856 theParameters->SetTarMinNonDiffMass( 0 <<
857 } <<
858 } // End of loop over the 2 string cases <<
859 756
860 G4int QuarkOrder[2]; << 757 G4double Alfa( 0.0 ), Beta( 0.0 );
861 G4LorentzVector Pstring1, Pstring2; << 758 for ( G4int i = 0; i < 2; i++ ) { // For Anti-baryon
862 G4double Ystring1 = 0.0, Ystring2 = 0.0; << 759 if ( Quark_Mom[i].getZ() != 0.0 ) {
863 << 760 Alfa += ( ScaleFactor * ModMom2[i] + MassQ2 ) / Quark_Mom[i].getZ();
864 for ( G4int iCase = 0; iCase < 2; ++iCase << 761 } else {
865 G4ThreeVector tmp = Quark_Mom[iCase] + Q << 762 Succes = false;
866 G4LorentzVector Pstring( tmp, std::sqrt( <<
867 std::sqrt( <<
868 // Add protection for rapidity = 0.5*ln <<
869 G4double Ystring = 0.0; <<
870 if ( Pstring.e() > 1.0e-30 ) { <<
871 if ( Pstring.e() + Pstring.pz() < 1.0e <<
872 Ystring = -1.0e30; // A very large <<
873 if ( Pstring.e() - Pstring.pz() < 1. <<
874 Ystring = 1.0e30; // A very large <<
875 } else { // Normal case <<
876 Ystring = Pstring.rapidity(); <<
877 } 763 }
>> 764 }
>> 765 for ( G4int i = 2; i < 4; i++ ) { // For baryon
>> 766 if ( Quark_Mom[i].getZ() != 0.0 ) {
>> 767 Beta += ( ScaleFactor * ModMom2[i] + MassQ2 ) / Quark_Mom[i].getZ();
>> 768 } else {
>> 769 Succes = false;
>> 770 }
>> 771 }
>> 772
>> 773 if ( ! Succes ) continue;
>> 774
>> 775 if ( std::sqrt( Alfa ) + std::sqrt( Beta ) > SqrtS ) {
>> 776 Succes = false;
>> 777 continue;
878 } 778 }
>> 779
>> 780 G4double DecayMomentum2 = S*S + Alfa*Alfa + Beta*Beta
>> 781 - 2.0*S*Alfa - 2.0*S*Beta - 2.0*Alfa*Beta;
>> 782 WminusTarget = ( S - Alfa + Beta + std::sqrt( DecayMomentum2 ) ) / 2.0 / SqrtS;
>> 783 WplusProjectile = SqrtS - Beta/WminusTarget;
>> 784
>> 785 } while ( ( ! Succes ) &&
>> 786 ++loopCounter < maxNumberOfLoops ); /* Loop checking, 10.08.2015, A.Ribon */
>> 787 if ( loopCounter >= maxNumberOfLoops ) {
>> 788 return false;
>> 789 }
>> 790
>> 791 G4double SqrtScaleF = std::sqrt( ScaleFactor );
>> 792
>> 793 for ( G4int i = 0; i < 2; i++ ) {
>> 794 G4double Pz = WplusProjectile * Quark_Mom[i].getZ() / 2.0 -
>> 795 ( ScaleFactor * ModMom2[i] + MassQ2 ) /
>> 796 ( 2.0 * WplusProjectile * Quark_Mom[i].getZ() );
>> 797 Quark_Mom[i].setZ( Pz );
>> 798 if ( ScaleFactor != 1.0 ) {
>> 799 Quark_Mom[i].setX( SqrtScaleF * Quark_Mom[i].getX() );
>> 800 Quark_Mom[i].setY( SqrtScaleF * Quark_Mom[i].getY() );
>> 801 }
>> 802 //G4cout << "Anti Q " << i << " " << Quark_Mom[i] << G4endl;
879 } 803 }
880 if ( iCase == 0 ) { // For the first st << 804 for ( G4int i = 2; i < 4; i++ ) {
881 Pstring1 = Pstring; Ystring1 = Ystring << 805 G4double Pz = -WminusTarget * Quark_Mom[i].getZ() / 2.0 +
882 } else { // For the second s << 806 ( ScaleFactor * ModMom2[i] + MassQ2 ) /
883 Pstring2 = Pstring; Ystring2 = Ystring << 807 ( 2.0 * WminusTarget * Quark_Mom[i].getZ() );
>> 808 Quark_Mom[i].setZ( Pz );
>> 809 if ( ScaleFactor != 1.0 ) {
>> 810 Quark_Mom[i].setX( SqrtScaleF * Quark_Mom[i].getX() );
>> 811 Quark_Mom[i].setY( SqrtScaleF * Quark_Mom[i].getY() );
>> 812 }
>> 813 //G4cout << "Bary Q " << i << " " << Quark_Mom[i] << G4endl;
884 } 814 }
885 } << 815 //G4cout << "Sum AQ " << Quark_Mom[0] + Quark_Mom[1] << G4endl
886 if ( Ystring1 > Ystring2 ) { << 816 // << "Sum Q " << Quark_Mom[2] + Quark_Mom[3] << G4endl;
887 common.Pprojectile = Pstring1; common.P <<
888 QuarkOrder[0] = 0; QuarkOrder[1] = 1; <<
889 } else { <<
890 common.Pprojectile = Pstring2; common.P <<
891 QuarkOrder[0] = 1; QuarkOrder[1] = 0; <<
892 } <<
893 <<
894 if ( common.RotateStrings ) { <<
895 common.Pprojectile *= common.RandomRotat <<
896 common.Ptarget *= common.RandomRotat <<
897 } <<
898 817
899 common.Pprojectile.transform( common.toLab << 818 G4ThreeVector tmp = Quark_Mom[0] + Quark_Mom[2];
900 common.Ptarget.transform( common.toLab ); << 819 G4LorentzVector Pstring1( tmp, std::sqrt( Quark_Mom[0].mag2() + MassQ2 ) +
901 << 820 std::sqrt( Quark_Mom[2].mag2() + MassQ2 ) );
902 G4LorentzVector Quark_4Mom[4]; << 821 G4double Ystring1 = Pstring1.rapidity();
903 for ( G4int i = 0; i < 4; ++i ) { << 822
904 Quark_4Mom[i] = G4LorentzVector( Quark_M << 823 //G4cout << "Mom 1 string " << G4endl << Quark_Mom[0] << G4endl << Quark_Mom[2] << G4endl
905 if ( common.RotateStrings ) Quark_4Mom[i << 824 // << tmp << " " << tmp.mag() << G4endl;
906 Quark_4Mom[i].transform( common.toLab ); << 825 //G4cout << "1 str " << Pstring1 << " " << Pstring1.mag() << " " << Ystring1 << G4endl;
907 } << 826
>> 827 tmp = Quark_Mom[1] + Quark_Mom[3];
>> 828 G4LorentzVector Pstring2( tmp, std::sqrt( Quark_Mom[1].mag2() + MassQ2 ) +
>> 829 std::sqrt( Quark_Mom[3].mag2() + MassQ2 ) );
>> 830 G4double Ystring2 = Pstring2.rapidity();
>> 831
>> 832 //G4cout << "Mom 2 string " << G4endl <<Quark_Mom[1] << G4endl << Quark_Mom[3] << G4endl
>> 833 // << tmp << " " << tmp.mag() << G4endl;
>> 834 //G4cout << "2 str " << Pstring2 << " " << Pstring2.mag() << " " << Ystring2 << G4endl;
>> 835
>> 836 if ( Ystring1 > Ystring2 ) {
>> 837 Pprojectile = Pstring1;
>> 838 Ptarget = Pstring2;
>> 839 } else {
>> 840 Pprojectile = Pstring2;
>> 841 Ptarget = Pstring1;
>> 842 }
908 843
909 projectile->Splitting(); << 844 //G4cout << "SumP CMS " << Pprojectile + Ptarget << " " << SqrtS << G4endl;
910 projectile->GetNextAntiParton()->Set4Momen << 845 Pprojectile.transform( toLab );
911 projectile->GetNextParton()->Set4Momentum( << 846 Ptarget.transform( toLab );
912 << 847 //G4cout << " SumP Lab " << Pprojectile + Ptarget << " " << SqrtS << G4endl;
913 target->Splitting(); << 848
914 target->GetNextParton()->Set4Momentum( Qua << 849 // Calculation of the creation time
915 target->GetNextAntiParton()->Set4Momentum( << 850 projectile->SetTimeOfCreation( target->GetTimeOfCreation() );
>> 851 projectile->SetPosition( target->GetPosition() );
>> 852 // Creation time and position of target nucleon were determined in
>> 853 // ReggeonCascade() of G4FTFModel
>> 854 //G4cout << "Mproj " << Pprojectile.mag() << G4endl << "Mtarg " << Ptarget.mag() << G4endl;
>> 855 projectile->Set4Momentum( Pprojectile );
>> 856 target->Set4Momentum( Ptarget );
>> 857 projectile->IncrementCollisionCount( 1 );
>> 858 target->IncrementCollisionCount( 1 );
916 859
917 // Calculation of the creation time << 860 return true;
918 // Creation time and position of target nu <<
919 projectile->SetTimeOfCreation( target->Get <<
920 projectile->SetPosition( target->GetPositi <<
921 projectile->Set4Momentum( common.Pprojecti <<
922 target->Set4Momentum( common.Ptarget ); <<
923 <<
924 projectile->IncrementCollisionCount( 1 ); <<
925 target->IncrementCollisionCount( 1 ); <<
926 861
927 return 0; // Completed successfully: noth << 862 } // End of if ( CandidatsN != 0 )
928 } // End of if ( CandidatsN != 0 ) <<
929 863
930 return 1; // Successfully ended, but the wo << 864 } // End of if ( Ksi < ( X_a + X_b + X_c ) / Xannihilation )
931 } <<
932 865
>> 866 // Simulation of anti-quark-quark string creation
933 867
934 //-------------------------------------------- << 868 if ( Ksi < ( X_a + X_b + X_c + X_d ) / Xannihilation ) {
935 869
936 G4bool G4FTFAnnihilation:: << 870 #ifdef debugFTFannih
937 Create1QuarkAntiQuarkString( G4VSplitableHadro << 871 G4cout << "Process d, only 1 quark - anti-quark string" << G4endl;
938 G4VSplitableHadro << 872 #endif
939 G4FTFParameters* <<
940 G4FTFAnnihilation <<
941 // Simulation of anti-quark - quark string c <<
942 873
943 #ifdef debugFTFannih << 874 G4int CandidatsN( 0 ), CandAQ[36], CandQ[36];
944 G4cout << "Process d, only 1 quark - anti-qu << 875 G4int LeftAQ( 0 ), LeftQ( 0 );
945 #endif <<
946 876
947 // Determine the set of candidates anti-quar << 877 for ( G4int iAQ1 = 0; iAQ1 < 3; iAQ1++ ) {
948 // Here "0", "1", "2" means, respectively, " << 878 for ( G4int iAQ2 = 0; iAQ2 < 3; iAQ2++ ) {
949 // of the (anti-baryon) projectile or (nucle << 879 if ( iAQ1 != iAQ2 ) {
950 G4int CandidatsN = 0, CandAQ[36], CandQ[36]; << 880 for ( G4int iQ1 = 0; iQ1 < 3; iQ1++ ) {
951 G4int LeftAQ = 0, LeftQ = 0; << 881 for ( G4int iQ2 = 0; iQ2 < 3; iQ2++ ) {
952 for ( G4int iAQ1 = 0; iAQ1 < 3; ++iAQ1 ) { << 882 if ( iQ1 != iQ2 ) {
953 for ( G4int iAQ2 = 0; iAQ2 < 3; ++iAQ2 ) { << 883 if ( -AQ[iAQ1] == Q[iQ1] && -AQ[iAQ2] == Q[iQ2] ) {
954 if ( iAQ1 != iAQ2 ) { << 884 if ( iAQ1 == 0 && iAQ2 == 1 ) { CandAQ[CandidatsN] = 2; }
955 for ( G4int iQ1 = 0; iQ1 < 3; ++iQ1 ) << 885 if ( iAQ1 == 1 && iAQ2 == 0 ) { CandAQ[CandidatsN] = 2; }
956 for ( G4int iQ2 = 0; iQ2 < 3; ++iQ2 << 886
957 if ( iQ1 != iQ2 ) { << 887 if ( iAQ1 == 0 && iAQ2 == 2 ) { CandAQ[CandidatsN] = 1; }
958 if ( -common.AQ[iAQ1] == common. << 888 if ( iAQ1 == 2 && iAQ2 == 0 ) { CandAQ[CandidatsN] = 1; }
959 if ( ( iAQ1 == 0 && i << 889
960 CandAQ[CandidatsN] = 2; << 890 if ( iAQ1 == 1 && iAQ2 == 2 ) { CandAQ[CandidatsN] = 0; }
961 } else if ( ( iAQ1 == 0 && i << 891 if ( iAQ1 == 2 && iAQ2 == 1 ) { CandAQ[CandidatsN] = 0; }
962 CandAQ[CandidatsN] = 1; << 892
963 } else if ( ( iAQ1 == 1 && i << 893 if ( iQ1 == 0 && iQ2 == 1 ) { CandQ[CandidatsN] = 2; }
964 CandAQ[CandidatsN] = 0; << 894 if ( iQ1 == 1 && iQ2 == 0 ) { CandQ[CandidatsN] = 2; }
965 } << 895
966 if ( ( iQ1 == 0 && << 896 if ( iQ1 == 0 && iQ2 == 2 ) { CandQ[CandidatsN] = 1; }
967 CandQ[CandidatsN] = 2; << 897 if ( iQ1 == 2 && iQ2 == 0 ) { CandQ[CandidatsN] = 1; }
968 } else if ( ( iQ1 == 0 && << 898
969 CandQ[CandidatsN] = 1; << 899 if ( iQ1 == 1 && iQ2 == 2 ) { CandQ[CandidatsN] = 0; }
970 } else if ( ( iQ1 == 1 && << 900 if ( iQ1 == 2 && iQ2 == 1 ) { CandQ[CandidatsN] = 0; }
971 CandQ[CandidatsN] = 0; << 901 CandidatsN++;
972 } 902 }
973 ++CandidatsN; <<
974 } 903 }
975 } 904 }
976 } 905 }
977 } 906 }
978 } 907 }
979 } 908 }
980 } <<
981 <<
982 if ( CandidatsN != 0 ) { <<
983 G4int SampledCase = (G4int)G4RandFlat::sho <<
984 LeftAQ = common.AQ[ CandAQ[SampledCase] ]; <<
985 LeftQ = common.Q[ CandQ[SampledCase] ]; <<
986 <<
987 // Set the string properties <<
988 projectile->SetFirstParton( LeftQ ); <<
989 projectile->SetSecondParton( LeftAQ ); <<
990 projectile->SetStatus( 0 ); <<
991 G4int aAQ = std::abs( LeftAQ ), aQ = std:: <<
992 G4int NewCode = 0; <<
993 G4double aKsi = G4UniformRand(); <<
994 // The string can have the quantum number <<
995 // of the PDG code is, respectively, 1 and <<
996 if ( aAQ == aQ ) { <<
997 if ( aAQ != 3 ) { <<
998 NewCode = 111; // Pi0-meson <<
999 if ( aKsi < 0.5 ) { <<
1000 NewCode = 221; // Eta -meson <<
1001 if ( aKsi < 0.25 ) { <<
1002 NewCode = 331; // Eta'-meson <<
1003 } <<
1004 } <<
1005 } else { <<
1006 NewCode = 221; // Eta -meson <<
1007 if ( aKsi < 0.5 ) { <<
1008 NewCode = 331; // Eta'-meson <<
1009 } <<
1010 } <<
1011 } else { <<
1012 if ( aAQ > aQ ) { <<
1013 NewCode = aAQ*100 + aQ*10 + 1; NewCod <<
1014 } else { <<
1015 NewCode = aQ*100 + aAQ*10 + 1; NewCod <<
1016 } <<
1017 } <<
1018 <<
1019 G4ParticleDefinition* TestParticle = G4Pa <<
1020 if ( ! TestParticle ) return false; <<
1021 projectile->SetDefinition( TestParticle ) <<
1022 theParameters->SetProjMinDiffMass( 0.5 ); <<
1023 theParameters->SetProjMinNonDiffMass( 0.5 <<
1024 <<
1025 target->SetStatus( 4 ); // The target nu <<
1026 common.Pprojectile.setPx( 0.0 ); <<
1027 common.Pprojectile.setPy( 0.0 ); <<
1028 common.Pprojectile.setPz( 0.0 ); <<
1029 common.Pprojectile.setE( common.SqrtS ); <<
1030 <<
1031 common.Pprojectile.transform( common.toLa <<
1032 909
1033 G4LorentzVector Pquark = G4LorentzVector << 910 if ( CandidatsN != 0 ) {
1034 G4LorentzVector Paquark = G4LorentzVector << 911 G4int SampledCase = G4RandFlat::shootInt( G4long( CandidatsN ) );
1035 << 912 LeftAQ = AQ[ CandAQ[SampledCase] ];
1036 if ( common.RotateStrings ) { << 913 LeftQ = Q[ CandQ[SampledCase] ];
1037 Pquark *= common.RandomRotation; Paquar << 914 //G4cout << "Left Aq Q " << LeftAQ << " " << LeftQ << G4endl;
1038 } << 915
1039 Pquark.transform(common.toLab); projecti << 916 // Set the string properties
1040 Paquark.transform(common.toLab); projecti << 917 projectile->SplitUp();
1041 << 918 //projectile->SetFirstParton( LeftAQ );
1042 projectile->Splitting(); << 919 //projectile->SetSecondParton( LeftQ );
>> 920 projectile->SetFirstParton( LeftQ );
>> 921 projectile->SetSecondParton( LeftAQ );
>> 922 projectile->SetStatus( 0 );
>> 923 target->SetStatus( 4 ); // The target nucleon has annihilated 3->4 Uzhi Oct 2014
>> 924 Pprojectile.setPx( 0.0 );
>> 925 Pprojectile.setPy( 0.0 );
>> 926 Pprojectile.setPz( 0.0 );
>> 927 Pprojectile.setE( SqrtS );
>> 928 Pprojectile.transform( toLab );
>> 929
>> 930 // Calculation of the creation time
>> 931 projectile->SetTimeOfCreation( target->GetTimeOfCreation() );
>> 932 projectile->SetPosition( target->GetPosition() );
>> 933 // Creation time and position of target nucleon were determined in
>> 934 // ReggeonCascade() of G4FTFModel
1043 935
1044 // Calculation of the creation time << 936 //G4cout << "Mproj " << Pprojectile.mag() << G4endl << "Mtarg " << Ptarget.mag() << G4endl;
1045 // Creation time and position of target n << 937 projectile->Set4Momentum( Pprojectile );
1046 projectile->SetTimeOfCreation( target->Ge <<
1047 projectile->SetPosition( target->GetPosit <<
1048 projectile->Set4Momentum( common.Pproject <<
1049 938
1050 projectile->IncrementCollisionCount( 1 ); << 939 projectile->IncrementCollisionCount( 1 );
1051 target->IncrementCollisionCount( 1 ); << 940 target->IncrementCollisionCount( 1 );
>> 941 return true;
>> 942 }
1052 943
1053 return true; << 944 } // End of if ( Ksi < ( X_a + X_b + X_c + X_d ) / Xannihilation )
1054 } // End of if ( CandidatsN != 0 ) <<
1055 945
>> 946 //G4cout << "Pr Y " << Pprojectile.rapidity() << " Tr Y " << Ptarget.rapidity() << G4endl;
1056 return true; 947 return true;
1057 } 948 }
1058 949
1059 950
1060 //=========================================== 951 //============================================================================
1061 952
1062 G4double G4FTFAnnihilation::ChooseX( G4double 953 G4double G4FTFAnnihilation::ChooseX( G4double /* Alpha */, G4double /* Beta */ ) const {
1063 // If for sampling Xs other values of Alfa 954 // If for sampling Xs other values of Alfa and Beta instead of 0.5 will be
1064 // chosen the method will be implemented 955 // chosen the method will be implemented
1065 //G4double tmp = Alpha*Beta; 956 //G4double tmp = Alpha*Beta;
1066 //tmp *= 1.0; 957 //tmp *= 1.0;
1067 return 0.5; 958 return 0.5;
1068 } 959 }
1069 960
1070 961
>> 962
1071 //=========================================== 963 //============================================================================
1072 964
1073 G4ThreeVector G4FTFAnnihilation::GaussianPt( 965 G4ThreeVector G4FTFAnnihilation::GaussianPt( G4double AveragePt2, G4double maxPtSquare ) const {
1074 // @@ this method is used in FTFModel as w 966 // @@ this method is used in FTFModel as well. Should go somewhere common!
1075 G4double Pt2 = 0.0; << 967 G4double Pt2( 0.0 );
1076 if ( AveragePt2 <= 0.0 ) { 968 if ( AveragePt2 <= 0.0 ) {
1077 Pt2 = 0.0; 969 Pt2 = 0.0;
1078 } else { 970 } else {
1079 Pt2 = -AveragePt2 * G4Log( 1.0 + G4Unifor 971 Pt2 = -AveragePt2 * G4Log( 1.0 + G4UniformRand() *
1080 ( G4E 972 ( G4Exp( -maxPtSquare/AveragePt2 ) -1.0 ) );
1081 } 973 }
1082 G4double Pt = std::sqrt( Pt2 ); 974 G4double Pt = std::sqrt( Pt2 );
1083 G4double phi = G4UniformRand() * twopi; 975 G4double phi = G4UniformRand() * twopi;
1084 return G4ThreeVector ( Pt*std::cos( phi ), 976 return G4ThreeVector ( Pt*std::cos( phi ), Pt*std::sin( phi ), 0.0 );
1085 } 977 }
1086 978
1087 979
1088 //=========================================== 980 //============================================================================
1089 981
1090 void G4FTFAnnihilation::UnpackBaryon( G4int I 982 void G4FTFAnnihilation::UnpackBaryon( G4int IdPDG, G4int& Q1, G4int& Q2, G4int& Q3 ) const {
1091 G4int AbsId = std::abs( IdPDG ); 983 G4int AbsId = std::abs( IdPDG );
1092 Q1 = AbsId / 1000; 984 Q1 = AbsId / 1000;
1093 Q2 = ( AbsId % 1000 ) / 100; 985 Q2 = ( AbsId % 1000 ) / 100;
1094 Q3 = ( AbsId % 100 ) / 10; 986 Q3 = ( AbsId % 100 ) / 10;
1095 if ( IdPDG < 0 ) { Q1 = -Q1; Q2 = -Q2; Q3 = 987 if ( IdPDG < 0 ) { Q1 = -Q1; Q2 = -Q2; Q3 = -Q3; } // Anti-baryon
1096 return; 988 return;
1097 } 989 }
1098 990
1099 991
1100 //=========================================== 992 //============================================================================
1101 993
1102 G4FTFAnnihilation::G4FTFAnnihilation( const G 994 G4FTFAnnihilation::G4FTFAnnihilation( const G4FTFAnnihilation& ) {
1103 throw G4HadronicException( __FILE__, __LINE 995 throw G4HadronicException( __FILE__, __LINE__,
1104 "G4FTFAnnihilati << 996 "G4FTFAnnihilation copy contructor not meant to be called" );
1105 } 997 }
1106 998
1107 999
1108 //=========================================== 1000 //============================================================================
1109 1001
1110 const G4FTFAnnihilation & G4FTFAnnihilation:: 1002 const G4FTFAnnihilation & G4FTFAnnihilation::operator=( const G4FTFAnnihilation& ) {
1111 throw G4HadronicException( __FILE__, __LINE 1003 throw G4HadronicException( __FILE__, __LINE__,
1112 "G4FTFAnnihilati 1004 "G4FTFAnnihilation = operator not meant to be called" );
1113 } 1005 }
1114 1006
1115 1007
1116 //=========================================== 1008 //============================================================================
1117 1009
1118 G4bool G4FTFAnnihilation::operator==( const G << 1010 int G4FTFAnnihilation::operator==( const G4FTFAnnihilation& ) const {
1119 throw G4HadronicException( __FILE__, __LINE 1011 throw G4HadronicException( __FILE__, __LINE__,
1120 "G4FTFAnnihilati 1012 "G4FTFAnnihilation == operator not meant to be called" );
1121 } 1013 }
1122 1014
1123 1015
1124 //=========================================== 1016 //============================================================================
1125 1017
1126 G4bool G4FTFAnnihilation::operator!=( const G << 1018 int G4FTFAnnihilation::operator!=( const G4FTFAnnihilation& ) const {
1127 throw G4HadronicException( __FILE__, __LINE 1019 throw G4HadronicException( __FILE__, __LINE__,
1128 "G4DiffractiveEx 1020 "G4DiffractiveExcitation != operator not meant to be called" );
1129 } 1021 }
1130 1022