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948d10f4 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | // Implementation of AliDecayer using Pythia8 | |
19 | // Author: andreas.morsch@cern.ch | |
20 | #include <TMath.h> | |
21 | #include <TPDGCode.h> | |
b584e2f5 | 22 | #include <TLorentzVector.h> |
774ceaaf | 23 | #include <TClonesArray.h> |
24 | #include <TParticle.h> | |
b584e2f5 | 25 | #include "AliTPythia8.h" |
948d10f4 | 26 | #include "AliDecayerPythia8.h" |
27 | #include "ParticleData.h" | |
28 | ||
29 | ClassImp(AliDecayerPythia8) | |
30 | ||
ad720100 | 31 | Bool_t AliDecayerPythia8::fgInit = kFALSE; |
32 | ||
948d10f4 | 33 | AliDecayerPythia8::AliDecayerPythia8(): |
b584e2f5 | 34 | TVirtualMCDecayer(), |
710f5272 | 35 | fPythia8(AliTPythia8::Instance()), |
b584e2f5 | 36 | fDebug(0), |
37 | fDecay(kAll), | |
38 | fHeavyFlavour(kTRUE) | |
948d10f4 | 39 | { |
40 | // Constructor | |
b584e2f5 | 41 | fPythia8->Pythia8()->readString("SoftQCD:elastic = on"); |
42 | fPythia8->Pythia8()->init(); | |
948d10f4 | 43 | } |
44 | ||
b584e2f5 | 45 | //___________________________________________________________________________ |
46 | void AliDecayerPythia8::Decay(Int_t pdg, TLorentzVector* p) | |
47 | { | |
48 | // Decay a single particle | |
49 | ClearEvent(); | |
50 | AppendParticle(pdg, p); | |
51 | Int_t idPart = fPythia8->Pythia8()->event[0].id(); | |
52 | fPythia8->Pythia8()->particleData.mayDecay(idPart,kTRUE); | |
53 | fPythia8->Pythia8()->moreDecays(); | |
54 | if (fDebug > 0) fPythia8->EventListing(); | |
55 | } | |
56 | ||
57 | //___________________________________________________________________________ | |
58 | Int_t AliDecayerPythia8::ImportParticles(TClonesArray *particles) | |
59 | { | |
774ceaaf | 60 | //import the decay products into particles array |
61 | const Float_t kconvT=0.001/2.999792458e8; // mm/c to seconds conversion | |
62 | const Float_t kconvL=1./10; // mm to cm conversion | |
63 | int np = fPythia8->ImportParticles(particles, "All"); | |
64 | // pythia assigns decay time in mm/c, convert to seconds | |
65 | for (int ip=1;ip<np;ip++) { | |
66 | TParticle* prod = (TParticle*)particles->At(ip); | |
67 | if (!prod) continue; | |
68 | prod->SetProductionVertex(prod->Vx()*kconvL,prod->Vy()*kconvL,prod->Vz()*kconvL,kconvT*prod->T()); | |
69 | } | |
70 | return np; | |
b584e2f5 | 71 | } |
72 | ||
73 | ||
ad720100 | 74 | void AliDecayerPythia8::Init() |
75 | { | |
76 | // Initialisation | |
77 | // | |
78 | if (!fgInit) { | |
79 | fgInit = kTRUE; | |
80 | // fPythia->SetDecayTable(); | |
81 | } | |
82 | ||
83 | // Switch on heavy flavor decays | |
84 | ||
85 | Int_t j; | |
86 | Int_t heavy[14] = {411, 421, 431, 4122, 4132, 4232, 4332, 511, 521, 531, 5122, 5132, 5232, 5332}; | |
87 | // fPythia->ResetDecayTable(); | |
88 | for (j=0; j < 14; j++) { | |
89 | if (fDecay == kNoDecayHeavy) { | |
710f5272 | 90 | fPythia8->ReadString(Form("%d:onMode = off", heavy[j])); |
ad720100 | 91 | } else { |
710f5272 | 92 | fPythia8->ReadString(Form("%d:onMode = on", heavy[j])); |
ad720100 | 93 | } |
94 | } | |
95 | ||
96 | ||
97 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. | |
98 | ||
99 | if (fDecay != kNeutralPion) { | |
710f5272 | 100 | fPythia8->ReadString("111:onMode = off"); |
ad720100 | 101 | } else { |
710f5272 | 102 | fPythia8->ReadString("111:onMode = on"); |
ad720100 | 103 | } |
104 | ||
710f5272 | 105 | fPythia8->ReadString("310:onMode = off"); |
106 | fPythia8->ReadString("3112:onMode = off"); | |
107 | fPythia8->ReadString("3212:onMode = off"); | |
108 | fPythia8->ReadString("3222:onMode = off"); | |
109 | fPythia8->ReadString("3312:onMode = off"); | |
110 | fPythia8->ReadString("3322:onMode = off"); | |
111 | fPythia8->ReadString("3334:onMode = off"); | |
ad720100 | 112 | // .. Force decay channels |
113 | ForceDecay(); | |
114 | } | |
115 | ||
948d10f4 | 116 | void AliDecayerPythia8::ForceDecay() |
117 | { | |
b7227478 | 118 | // |
948d10f4 | 119 | // Force a particle decay mode |
120 | // Switch heavy flavour production off if requested | |
121 | if (!fHeavyFlavour) SwitchOffHeavyFlavour(); | |
122 | // | |
123 | Decay_t decay = fDecay; | |
710f5272 | 124 | fPythia8->ReadString("HadronLevel:Decay = on"); |
948d10f4 | 125 | |
126 | if (decay == kNoDecayHeavy) return; | |
127 | ||
128 | // | |
129 | // select mode | |
948d10f4 | 130 | switch (decay) |
131 | { | |
132 | case kHardMuons: | |
ad720100 | 133 | // B0 -> mu X |
710f5272 | 134 | fPythia8->ReadString("511:onMode = off"); |
135 | fPythia8->ReadString("511:onIfAny = 13 443 100443"); | |
ad720100 | 136 | // B+/- -> mu X |
710f5272 | 137 | fPythia8->ReadString("521:onMode = off"); |
138 | fPythia8->ReadString("521:onIfAny = 13 443 100443"); | |
ad720100 | 139 | // Bs -> mu X |
710f5272 | 140 | fPythia8->ReadString("531:onMode = off"); |
141 | fPythia8->ReadString("531:onIfAny = 13 443 100443"); | |
ad720100 | 142 | // Lambda_b -> mu X |
710f5272 | 143 | fPythia8->ReadString("5122:onMode = off"); |
144 | fPythia8->ReadString("5122:onIfAny = 13 443 100443"); | |
ad720100 | 145 | // Sigma_b- -> mu X |
710f5272 | 146 | fPythia8->ReadString("5132:onMode = off"); |
147 | fPythia8->ReadString("5132:onIfAny = 13 443 100443"); | |
ad720100 | 148 | // Sigma_b0 -> mu X |
710f5272 | 149 | fPythia8->ReadString("5232:onMode = off"); |
150 | fPythia8->ReadString("5232:onIfAny = 13 443 100443"); | |
ad720100 | 151 | // Omega_b -> mu X |
710f5272 | 152 | fPythia8->ReadString("5332:onMode = off"); |
153 | fPythia8->ReadString("5332:onIfAny = 13 443 100443"); | |
ad720100 | 154 | // Psi' -> mu+ mu- |
710f5272 | 155 | fPythia8->ReadString("100443:onMode = off"); |
156 | fPythia8->ReadString("100443:onIfAny = 443"); | |
ad720100 | 157 | // Psi -> mu+ mu- |
710f5272 | 158 | fPythia8->ReadString("443:onMode = off"); |
159 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
ad720100 | 160 | // D+/- -> mu X |
710f5272 | 161 | fPythia8->ReadString("411:onMode = off"); |
162 | fPythia8->ReadString("411:onIfAll = 13"); | |
ad720100 | 163 | // D0 -> mu X |
710f5272 | 164 | fPythia8->ReadString("421:onMode = off"); |
165 | fPythia8->ReadString("421:onIfAll = 13"); | |
ad720100 | 166 | // D_s -> mu X |
710f5272 | 167 | fPythia8->ReadString("431:onMode = off"); |
168 | fPythia8->ReadString("431:onIfAll = 13"); | |
ad720100 | 169 | // Lambda_c -> mu X |
710f5272 | 170 | fPythia8->ReadString("4122:onMode = off"); |
171 | fPythia8->ReadString("4122:onIfAll = 13"); | |
ad720100 | 172 | // Sigma_c -> mu X |
710f5272 | 173 | fPythia8->ReadString("4132:onMode = off"); |
174 | fPythia8->ReadString("4132:onIfAll = 13"); | |
ad720100 | 175 | // Sigma_c+ -> mu X |
710f5272 | 176 | fPythia8->ReadString("4232:onMode = off"); |
177 | fPythia8->ReadString("4232:onIfAll = 13"); | |
ad720100 | 178 | // Omega_c -> mu X |
710f5272 | 179 | fPythia8->ReadString("4332:onMode = off"); |
180 | fPythia8->ReadString("4332:onIfAll = 13"); | |
b7227478 | 181 | |
948d10f4 | 182 | break; |
183 | case kChiToJpsiGammaToMuonMuon: | |
b7227478 | 184 | // Chi_1c -> J/Psi Gamma |
710f5272 | 185 | fPythia8->ReadString("20443:onMode = off"); |
186 | fPythia8->ReadString("20443:onIfAll = 443 22"); | |
b7227478 | 187 | // Chi_2c -> J/Psi Gamma |
710f5272 | 188 | fPythia8->ReadString("445:onMode = off"); |
189 | fPythia8->ReadString("445:onIfAll = 443 22"); | |
b7227478 | 190 | // J/Psi -> mu+ mu- |
710f5272 | 191 | fPythia8->ReadString("443:onMode = off"); |
192 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
948d10f4 | 193 | break; |
194 | case kChiToJpsiGammaToElectronElectron: | |
b7227478 | 195 | // Chi_1c -> J/Psi Gamma |
710f5272 | 196 | fPythia8->ReadString("20443:onMode = off"); |
197 | fPythia8->ReadString("20443:onIfAll = 443 22"); | |
b7227478 | 198 | // Chi_2c -> J/Psi Gamma |
710f5272 | 199 | fPythia8->ReadString("445:onMode = off"); |
200 | fPythia8->ReadString("445:onIfAll = 443 22"); | |
b7227478 | 201 | // J/Psi -> e+ e- |
710f5272 | 202 | fPythia8->ReadString("443:onMode = off"); |
203 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
948d10f4 | 204 | break; |
205 | ||
206 | case kBSemiMuonic: | |
ad720100 | 207 | // B0 -> mu X |
710f5272 | 208 | fPythia8->ReadString("511:onMode = off"); |
209 | fPythia8->ReadString("511:onIfAny = 13"); | |
ad720100 | 210 | // B+/- -> mu X |
710f5272 | 211 | fPythia8->ReadString("521:onMode = off"); |
212 | fPythia8->ReadString("521:onIfAny = 13"); | |
ad720100 | 213 | // B_s -> mu X |
710f5272 | 214 | fPythia8->ReadString("531:onMode = off"); |
215 | fPythia8->ReadString("531:onIfAny = 13"); | |
ad720100 | 216 | // Lambda_b -> mu X |
710f5272 | 217 | fPythia8->ReadString("5122:onMode = off"); |
218 | fPythia8->ReadString("5122:onIfAny = 13"); | |
ad720100 | 219 | // Sigma_b -> mu X |
710f5272 | 220 | fPythia8->ReadString("5132:onMode = off"); |
221 | fPythia8->ReadString("5132:onIfAny = 13"); | |
ad720100 | 222 | // Sigma_b0 -> mu X |
710f5272 | 223 | fPythia8->ReadString("5232:onMode = off"); |
224 | fPythia8->ReadString("5232:onIfAny = 13"); | |
ad720100 | 225 | // Omega_b -> mu X |
710f5272 | 226 | fPythia8->ReadString("5332:onMode = off"); |
227 | fPythia8->ReadString("5332:onIfAny = 13"); | |
948d10f4 | 228 | break; |
229 | case kSemiMuonic: | |
ad720100 | 230 | // D+- -> mu X |
710f5272 | 231 | fPythia8->ReadString("411:onMode = off"); |
232 | fPythia8->ReadString("411:onIfAll = 13"); | |
ad720100 | 233 | // D0 -> mu X |
710f5272 | 234 | fPythia8->ReadString("421:onMode = off"); |
235 | fPythia8->ReadString("421:onIfAll = 13"); | |
ad720100 | 236 | // D_s -> mu X |
710f5272 | 237 | fPythia8->ReadString("431:onMode = off"); |
238 | fPythia8->ReadString("431:onIfAll = 13"); | |
ad720100 | 239 | // Lambda_c -> mu X |
710f5272 | 240 | fPythia8->ReadString("4122:onMode = off"); |
241 | fPythia8->ReadString("4122:onIfAll = 13"); | |
ad720100 | 242 | // Sigma_c -> mu X |
710f5272 | 243 | fPythia8->ReadString("4132:onMode = off"); |
244 | fPythia8->ReadString("4132:onIfAll = 13"); | |
ad720100 | 245 | // Sigma -> mu X |
710f5272 | 246 | fPythia8->ReadString("4232:onMode = off"); |
247 | fPythia8->ReadString("4232:onIfAll = 13"); | |
ad720100 | 248 | // Omega_c -> mu X |
710f5272 | 249 | fPythia8->ReadString("4332:onMode = off"); |
250 | fPythia8->ReadString("4332:onIfAll = 13"); | |
ad720100 | 251 | // B0 -> mu X |
710f5272 | 252 | fPythia8->ReadString("511:onMode = off"); |
253 | fPythia8->ReadString("511:onIfAny = 13"); | |
ad720100 | 254 | // B+/- -> mu X |
710f5272 | 255 | fPythia8->ReadString("521:onMode = off"); |
256 | fPythia8->ReadString("521:onIfAny = 13"); | |
ad720100 | 257 | // B_s -> mu X |
710f5272 | 258 | fPythia8->ReadString("531:onMode = off"); |
259 | fPythia8->ReadString("531:onIfAny = 13"); | |
ad720100 | 260 | // Lambda_c -> mu X |
710f5272 | 261 | fPythia8->ReadString("5122:onMode = off"); |
262 | fPythia8->ReadString("5122:onIfAny = 13"); | |
ad720100 | 263 | // Sigma_c -> mu X |
710f5272 | 264 | fPythia8->ReadString("5132:onMode = off"); |
265 | fPythia8->ReadString("5132:onIfAny = 13"); | |
ad720100 | 266 | // Sigma_c -> mu X |
710f5272 | 267 | fPythia8->ReadString("5232:onMode = off"); |
268 | fPythia8->ReadString("5232:onIfAny = 13"); | |
ad720100 | 269 | // Omega_c -> mu X |
710f5272 | 270 | fPythia8->ReadString("5332:onMode = off"); |
271 | fPythia8->ReadString("5332:onIfAny = 13"); | |
b7227478 | 272 | |
38a19176 | 273 | break; |
274 | case kJpsiDiMuon: | |
275 | // J/Psi-> mu+ mu- | |
710f5272 | 276 | fPythia8->ReadString("443:onMode = off"); |
277 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
948d10f4 | 278 | break; |
279 | case kDiMuon: | |
ad720100 | 280 | // Rho -> mu+ mu- |
710f5272 | 281 | fPythia8->ReadString("113:onMode = off"); |
282 | fPythia8->ReadString("113:onIfAll = 13 13"); | |
ad720100 | 283 | // Eta-> mu+ mu- |
710f5272 | 284 | fPythia8->ReadString("221:onMode = off"); |
285 | fPythia8->ReadString("221:onIfAll = 13 13"); | |
ad720100 | 286 | // omega-> mu+ mu- |
710f5272 | 287 | fPythia8->ReadString("223:onMode = off"); |
288 | fPythia8->ReadString("223:onIfAll = 13 13"); | |
ad720100 | 289 | // phi-> mu+ mu- |
710f5272 | 290 | fPythia8->ReadString("333:onMode = off"); |
291 | fPythia8->ReadString("333:onIfAll = 13 13"); | |
ad720100 | 292 | // J/Psi-> mu+ mu- |
710f5272 | 293 | fPythia8->ReadString("443:onMode = off"); |
294 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
ad720100 | 295 | // Psi'-> mu+ mu- |
710f5272 | 296 | fPythia8->ReadString("100443:onMode = off"); |
297 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
ad720100 | 298 | // Ups-> mu+ mu- |
710f5272 | 299 | fPythia8->ReadString("553:onMode = off"); |
300 | fPythia8->ReadString("553:onIfAll = 13 13"); | |
ad720100 | 301 | // Ups'-> mu+ mu- |
710f5272 | 302 | fPythia8->ReadString("100553:onMode = off"); |
303 | fPythia8->ReadString("100553:onIfAll = 13 13"); | |
ad720100 | 304 | // Ups''-> mu+ mu- |
710f5272 | 305 | fPythia8->ReadString("200553:onMode = off"); |
306 | fPythia8->ReadString("200553:onIfAll = 13 13"); | |
948d10f4 | 307 | break; |
308 | case kBSemiElectronic: | |
ad720100 | 309 | // B0 - > e+ e- |
710f5272 | 310 | fPythia8->ReadString("511:onMode = off"); |
311 | fPythia8->ReadString("511:onIfAny = 11"); | |
ad720100 | 312 | // B+- -> e+ e- |
710f5272 | 313 | fPythia8->ReadString("521:onMode = off"); |
314 | fPythia8->ReadString("521:onIfAny = 11"); | |
ad720100 | 315 | // B_s -> e+ e- |
710f5272 | 316 | fPythia8->ReadString("531:onMode = off"); |
317 | fPythia8->ReadString("531:onIfAny = 11"); | |
ad720100 | 318 | // Lambda_b -> e+ e- |
710f5272 | 319 | fPythia8->ReadString("5122:onMode = off"); |
320 | fPythia8->ReadString("5122:onIfAny = 11"); | |
ad720100 | 321 | // Sigma_b -> e+ e- |
710f5272 | 322 | fPythia8->ReadString("5132:onMode = off"); |
323 | fPythia8->ReadString("5132:onIfAny = 11"); | |
ad720100 | 324 | // Sigma_b -> e+ e- |
710f5272 | 325 | fPythia8->ReadString("5232:onMode = off"); |
326 | fPythia8->ReadString("5232:onIfAny = 11"); | |
ad720100 | 327 | // Omega_b ->e+ e- |
710f5272 | 328 | fPythia8->ReadString("5332:onMode = off"); |
329 | fPythia8->ReadString("5332:onIfAny = 11"); | |
948d10f4 | 330 | break; |
331 | case kSemiElectronic: | |
ad720100 | 332 | // D+/- -> e X |
710f5272 | 333 | fPythia8->ReadString("411:onMode = off"); |
334 | fPythia8->ReadString("411:onIfAll = 11"); | |
ad720100 | 335 | // D0 -> e X |
710f5272 | 336 | fPythia8->ReadString("421:onMode = off"); |
337 | fPythia8->ReadString("421:onIfAll = 11"); | |
ad720100 | 338 | // D_s ->e X |
710f5272 | 339 | fPythia8->ReadString("431:onMode = off"); |
340 | fPythia8->ReadString("431:onIfAll = 11"); | |
ad720100 | 341 | // Lambda_c -> e X |
710f5272 | 342 | fPythia8->ReadString("4122:onMode = off"); |
343 | fPythia8->ReadString("4122:onIfAll = 11"); | |
ad720100 | 344 | // Sigma_c -> e X |
710f5272 | 345 | fPythia8->ReadString("4132:onMode = off"); |
346 | fPythia8->ReadString("4132:onIfAll = 11"); | |
ad720100 | 347 | // Sigma_c -> e X |
710f5272 | 348 | fPythia8->ReadString("4232:onMode = off"); |
349 | fPythia8->ReadString("4232:onIfAll = 11"); | |
ad720100 | 350 | // Omega_c -> e X |
710f5272 | 351 | fPythia8->ReadString("4332:onMode = off"); |
352 | fPythia8->ReadString("4332:onIfAll = 11"); | |
ad720100 | 353 | // B0 -> e X |
710f5272 | 354 | fPythia8->ReadString("511:onMode = off"); |
355 | fPythia8->ReadString("511:onIfAny = 11"); | |
ad720100 | 356 | // B+/- -> e X |
710f5272 | 357 | fPythia8->ReadString("521:onMode = off"); |
358 | fPythia8->ReadString("521:onIfAny = 11"); | |
ad720100 | 359 | // B_s -> e X |
710f5272 | 360 | fPythia8->ReadString("531:onMode = off"); |
361 | fPythia8->ReadString("531:onIfAny = 11"); | |
ad720100 | 362 | // Lambda_b -> e X |
710f5272 | 363 | fPythia8->ReadString("5122:onMode = off"); |
364 | fPythia8->ReadString("5122:onIfAny = 11"); | |
ad720100 | 365 | // Sigma_b -> e X |
710f5272 | 366 | fPythia8->ReadString("5132:onMode = off"); |
367 | fPythia8->ReadString("5132:onIfAny = 11"); | |
ad720100 | 368 | // Sigma_b -> e X |
710f5272 | 369 | fPythia8->ReadString("5232:onMode = off"); |
370 | fPythia8->ReadString("5232:onIfAny = 11"); | |
ad720100 | 371 | // Omega_b -> e X |
710f5272 | 372 | fPythia8->ReadString("5332:onMode = off"); |
373 | fPythia8->ReadString("5332:onIfAny = 11"); | |
948d10f4 | 374 | break; |
375 | case kDiElectron: | |
ad720100 | 376 | // Rho -> e+e- |
710f5272 | 377 | fPythia8->ReadString("113:onMode = off"); |
378 | fPythia8->ReadString("113:onIfAll = 11 11"); | |
ad720100 | 379 | // Eta -> e+e- |
710f5272 | 380 | fPythia8->ReadString("221:onMode = off"); |
381 | fPythia8->ReadString("221:onIfAll = 11 11"); | |
ad720100 | 382 | // omega -> e+e- |
710f5272 | 383 | fPythia8->ReadString("223:onMode = off"); |
384 | fPythia8->ReadString("223:onIfAll = 11 11"); | |
ad720100 | 385 | // phi -> e+e- |
710f5272 | 386 | fPythia8->ReadString("333:onMode = off"); |
387 | fPythia8->ReadString("333:onIfAll = 11 11"); | |
ad720100 | 388 | // J/Psi -> e+e- |
710f5272 | 389 | fPythia8->ReadString("443:onMode = off"); |
390 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
ad720100 | 391 | // Psi' -> e+e- |
710f5272 | 392 | fPythia8->ReadString("100443:onMode = off"); |
393 | fPythia8->ReadString("100443:onIfAll = 11 11"); | |
ad720100 | 394 | // Ups -> e+e- |
710f5272 | 395 | fPythia8->ReadString("553:onMode = off"); |
396 | fPythia8->ReadString("553:onIfAll = 11 11"); | |
ad720100 | 397 | // Ups' -> e+e- |
710f5272 | 398 | fPythia8->ReadString("100553:onMode = off"); |
399 | fPythia8->ReadString("100553:onIfAll = 11 11"); | |
ad720100 | 400 | // Ups'' -> e+e- |
710f5272 | 401 | fPythia8->ReadString("200553:onMode = off"); |
402 | fPythia8->ReadString("200553:onIfAll = 11 11"); | |
948d10f4 | 403 | break; |
404 | case kBJpsiDiMuon: | |
ad720100 | 405 | // B0 -> J/Psi (Psi') X |
710f5272 | 406 | fPythia8->ReadString("511:onMode = off"); |
407 | fPythia8->ReadString("511:onIfAny = 443 100443"); | |
ad720100 | 408 | // B+/- -> J/Psi (Psi') X |
710f5272 | 409 | fPythia8->ReadString("521:onMode = off"); |
410 | fPythia8->ReadString("521:onIfAny = 443 100443"); | |
ad720100 | 411 | // B_s -> J/Psi (Psi') X |
710f5272 | 412 | fPythia8->ReadString("531:onMode = off"); |
413 | fPythia8->ReadString("531:onIfAny = 443 100443"); | |
ad720100 | 414 | // Lambda_b -> J/Psi (Psi') X |
710f5272 | 415 | fPythia8->ReadString("5122:onMode = off"); |
416 | fPythia8->ReadString("5122:onIfAny = 443 100443"); | |
b7227478 | 417 | // |
ad720100 | 418 | // J/Psi -> mu+ mu- |
710f5272 | 419 | fPythia8->ReadString("443:onMode = off"); |
420 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
ad720100 | 421 | // Psi' -> mu+ mu- |
710f5272 | 422 | fPythia8->ReadString("100443:onMode = off"); |
423 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
948d10f4 | 424 | break; |
425 | case kBPsiPrimeDiMuon: | |
ad720100 | 426 | // B0 -> Psi' X |
710f5272 | 427 | fPythia8->ReadString("511:onMode = off"); |
428 | fPythia8->ReadString("511:onIfAny = 100443"); | |
ad720100 | 429 | // B+/- -> Psi' X |
710f5272 | 430 | fPythia8->ReadString("521:onMode = off"); |
431 | fPythia8->ReadString("521:onIfAny = 100443"); | |
ad720100 | 432 | // B_s -> Psi' X |
710f5272 | 433 | fPythia8->ReadString("531:onMode = off"); |
434 | fPythia8->ReadString("531:onIfAny = 100443"); | |
ad720100 | 435 | // Lambda_b -> Psi' X |
710f5272 | 436 | fPythia8->ReadString("5122:onMode = off"); |
437 | fPythia8->ReadString("5122:onIfAny = 100443"); | |
b7227478 | 438 | // |
ad720100 | 439 | // Psi' -> mu+ mu- |
710f5272 | 440 | fPythia8->ReadString("100443:onMode = off"); |
441 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
948d10f4 | 442 | break; |
443 | case kBJpsiDiElectron: | |
ad720100 | 444 | // B0 -> Psi X |
710f5272 | 445 | fPythia8->ReadString("511:onMode = off"); |
446 | fPythia8->ReadString("511:onIfAny = 443"); | |
ad720100 | 447 | // B+/- -> Psi X |
710f5272 | 448 | fPythia8->ReadString("521:onMode = off"); |
449 | fPythia8->ReadString("521:onIfAny = 443"); | |
ad720100 | 450 | // B_s -> Psi X |
710f5272 | 451 | fPythia8->ReadString("531:onMode = off"); |
452 | fPythia8->ReadString("531:onIfAny = 443"); | |
ad720100 | 453 | // Lambda_b -> Psi X |
710f5272 | 454 | fPythia8->ReadString("5122:onMode = off"); |
455 | fPythia8->ReadString("5122:onIfAny = 443"); | |
b7227478 | 456 | // |
ad720100 | 457 | // Psi -> mu+ mu- |
710f5272 | 458 | fPythia8->ReadString("443:onMode = off"); |
459 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
b7227478 | 460 | |
948d10f4 | 461 | break; |
462 | case kBJpsi: | |
ad720100 | 463 | // B0 -> Psi X |
710f5272 | 464 | fPythia8->ReadString("511:onMode = off"); |
465 | fPythia8->ReadString("511:onIfAny = 443"); | |
ad720100 | 466 | // B+/- -> Psi X |
710f5272 | 467 | fPythia8->ReadString("521:onMode = off"); |
468 | fPythia8->ReadString("521:onIfAny = 443"); | |
ad720100 | 469 | // B_s -> Psi X |
710f5272 | 470 | fPythia8->ReadString("531:onMode = off"); |
471 | fPythia8->ReadString("531:onIfAny = 443"); | |
ad720100 | 472 | // Lambda_b -> Psi X |
710f5272 | 473 | fPythia8->ReadString("5122:onMode = off"); |
474 | fPythia8->ReadString("5122:onIfAny = 443"); | |
948d10f4 | 475 | break; |
476 | case kBPsiPrimeDiElectron: | |
ad720100 | 477 | // B0 -> Psi' X |
710f5272 | 478 | fPythia8->ReadString("511:onMode = off"); |
479 | fPythia8->ReadString("511:onIfAny = 100443"); | |
ad720100 | 480 | // B+/- -> Psi' X |
710f5272 | 481 | fPythia8->ReadString("521:onMode = off"); |
482 | fPythia8->ReadString("521:onIfAny = 100443"); | |
ad720100 | 483 | // B_s -> Psi' X |
710f5272 | 484 | fPythia8->ReadString("531:onMode = off"); |
485 | fPythia8->ReadString("531:onIfAny = 100443"); | |
ad720100 | 486 | // Lambda_b -> Psi' X |
710f5272 | 487 | fPythia8->ReadString("5122:onMode = off"); |
488 | fPythia8->ReadString("5122:onIfAny = 100443"); | |
b7227478 | 489 | // |
ad720100 | 490 | // Psi' -> mu+ mu- |
710f5272 | 491 | fPythia8->ReadString("100443:onMode = off"); |
492 | fPythia8->ReadString("100443:onIfAll = 11 11"); | |
948d10f4 | 493 | break; |
494 | case kPiToMu: | |
ad720100 | 495 | // pi -> mu nu |
710f5272 | 496 | fPythia8->ReadString("211:onMode = off"); |
497 | fPythia8->ReadString("211:onIfAny = 13"); | |
948d10f4 | 498 | break; |
499 | case kKaToMu: | |
ad720100 | 500 | // K -> mu nu |
710f5272 | 501 | fPythia8->ReadString("321:onMode = off"); |
502 | fPythia8->ReadString("321:onIfAny = 13"); | |
948d10f4 | 503 | break; |
504 | case kAllMuonic: | |
ad720100 | 505 | // pi/K -> mu |
710f5272 | 506 | fPythia8->ReadString("211:onMode = off"); |
507 | fPythia8->ReadString("211:onIfAny = 13"); | |
508 | fPythia8->ReadString("321:onMode = off"); | |
509 | fPythia8->ReadString("321:onIfAny = 13"); | |
948d10f4 | 510 | break; |
511 | case kWToMuon: | |
ad720100 | 512 | // W -> mu X |
710f5272 | 513 | fPythia8->ReadString("24:onMode = off"); |
514 | fPythia8->ReadString("24:onIfAny = 13"); | |
948d10f4 | 515 | break; |
516 | case kWToCharm: | |
ad720100 | 517 | // W -> c X |
710f5272 | 518 | fPythia8->ReadString("24:onMode = off"); |
519 | fPythia8->ReadString("24:onIfAny = 4"); | |
948d10f4 | 520 | break; |
521 | case kWToCharmToMuon: | |
ad720100 | 522 | // W -> c X |
710f5272 | 523 | fPythia8->ReadString("24:onMode = off"); |
524 | fPythia8->ReadString("24:onIfAny = 4"); | |
ad720100 | 525 | // D+- -> mu X |
710f5272 | 526 | fPythia8->ReadString("411:onMode = off"); |
527 | fPythia8->ReadString("411:onIfAll = 13"); | |
ad720100 | 528 | // D0 -> mu X |
710f5272 | 529 | fPythia8->ReadString("421:onMode = off"); |
530 | fPythia8->ReadString("421:onIfAll = 13"); | |
ad720100 | 531 | // D_s -> mu X |
710f5272 | 532 | fPythia8->ReadString("431:onMode = off"); |
533 | fPythia8->ReadString("431:onIfAll = 13"); | |
ad720100 | 534 | // Lambda_c -> mu X |
710f5272 | 535 | fPythia8->ReadString("4122:onMode = off"); |
536 | fPythia8->ReadString("4122:onIfAll = 13"); | |
ad720100 | 537 | // Sigma_c -> mu X |
710f5272 | 538 | fPythia8->ReadString("4132:onMode = off"); |
539 | fPythia8->ReadString("4132:onIfAll = 13"); | |
ad720100 | 540 | // Sigma_c -> mu X |
710f5272 | 541 | fPythia8->ReadString("4232:onMode = off"); |
542 | fPythia8->ReadString("4232:onIfAll = 13"); | |
ad720100 | 543 | // Omega_c -> mu X |
710f5272 | 544 | fPythia8->ReadString("4332:onMode = off"); |
545 | fPythia8->ReadString("4332:onIfAll = 13"); | |
948d10f4 | 546 | break; |
547 | case kZDiMuon: | |
ad720100 | 548 | // Z -> mu+ mu- |
710f5272 | 549 | fPythia8->ReadString("23:onMode = off"); |
550 | fPythia8->ReadString("23:onIfAll = 13 13"); | |
948d10f4 | 551 | break; |
552 | case kZDiElectron: | |
ad720100 | 553 | // Z -> e+ e- |
710f5272 | 554 | fPythia8->ReadString("23:onMode = off"); |
555 | fPythia8->ReadString("23:onIfAll = 11 11"); | |
948d10f4 | 556 | break; |
557 | case kHadronicD: | |
558 | ForceHadronicD(1); | |
559 | break; | |
560 | case kHadronicDWithout4Bodies: | |
561 | ForceHadronicD(0); | |
562 | break; | |
563 | case kPhiKK: | |
ad720100 | 564 | // Phi-> K+ K- |
710f5272 | 565 | fPythia8->ReadString("333:onMode = off"); |
566 | fPythia8->ReadString("333:onIfAll = 321 321"); | |
948d10f4 | 567 | break; |
568 | case kOmega: | |
ad720100 | 569 | // Omega -> Lambda K |
710f5272 | 570 | fPythia8->ReadString("3334:onMode = off"); |
571 | fPythia8->ReadString("3334:onIfAll = 3122 321 "); | |
51da44a9 | 572 | break; |
d3553100 | 573 | case kLambda: |
574 | // Lambda -> p pi- | |
710f5272 | 575 | fPythia8->ReadString("3122:onMode = off"); |
576 | fPythia8->ReadString("3122:onIfAll = 2212 211 "); | |
51da44a9 | 577 | break; |
482c0e0c | 578 | case kBeautyUpgrade: |
710f5272 | 579 | fPythia8->ReadString("5122:onMode = off"); |
580 | fPythia8->ReadString("4122:onMode = off"); | |
581 | fPythia8->ReadString("5122:onIfAll = 4122"); | |
582 | fPythia8->ReadString("4122:onIfAll = 3122"); | |
e549a63e | 583 | break; |
948d10f4 | 584 | case kAll: |
585 | break; | |
586 | case kNoDecay: | |
710f5272 | 587 | fPythia8->ReadString("HadronLevel:Decay = off"); |
948d10f4 | 588 | break; |
589 | case kNoDecayHeavy: | |
1fefb2d4 | 590 | case kNoDecayBeauty: |
948d10f4 | 591 | case kNeutralPion: |
9610308a | 592 | case kPsiPrimeJpsiDiElectron: |
7d09f746 | 593 | case kElectronEM: |
594 | case kGammaEM: | |
595 | case kDiElectronEM: | |
948d10f4 | 596 | break; |
597 | } | |
598 | } | |
599 | ||
600 | Float_t AliDecayerPythia8::GetPartialBranchingRatio(Int_t ipart) | |
601 | { | |
602 | // Get the partial branching ration for the forced decay channels | |
603 | ||
710f5272 | 604 | Pythia8::Pythia* thePythia = fPythia8->Pythia8(); |
b584e2f5 | 605 | Pythia8::ParticleData & table = thePythia->particleData; |
606 | Pythia8::ParticleDataEntry* pd = table.particleDataEntryPtr(ipart); | |
607 | ||
608 | Int_t nc = pd->sizeChannels(); | |
948d10f4 | 609 | Float_t br = 0.; |
610 | // | |
611 | // Loop over decay channels | |
612 | for (Int_t ic = 0; ic < nc; ic++) { | |
b584e2f5 | 613 | Pythia8::DecayChannel& decCh = pd->channel(ic); |
b7227478 | 614 | for (Int_t i = 0; i < decCh.multiplicity(); i++) { |
948d10f4 | 615 | br += decCh.bRatio(); |
616 | } | |
617 | } | |
618 | return (br); | |
619 | } | |
620 | ||
621 | ||
948d10f4 | 622 | Float_t AliDecayerPythia8::GetLifetime(Int_t kf) |
623 | { | |
624 | // Return lifetime of particle | |
710f5272 | 625 | Pythia8::Pythia* thePythia = fPythia8->Pythia8(); |
b584e2f5 | 626 | Pythia8::ParticleData& table = thePythia->particleData; |
948d10f4 | 627 | Float_t tau = table.tau0(kf); |
b584e2f5 | 628 | return (tau); |
948d10f4 | 629 | } |
630 | ||
631 | void AliDecayerPythia8::SwitchOffHeavyFlavour() | |
632 | { | |
633 | // Switch off heavy flavour production | |
634 | // | |
635 | // Maximum number of quark flavours used in pdf | |
710f5272 | 636 | fPythia8->ReadString("PDFinProcess:nQuarkIn = 3"); |
948d10f4 | 637 | // Maximum number of flavors that can be used in showers |
710f5272 | 638 | fPythia8->ReadString("SpaceShower:nQuarkIn = 3"); |
639 | fPythia8->ReadString("TimeShower:nGammaToQuark = 3"); | |
640 | fPythia8->ReadString("TimeShower:nGluonToQuark = 3"); | |
948d10f4 | 641 | } |
642 | ||
643 | ||
644 | void AliDecayerPythia8::ForceHadronicD(Int_t optUse4Bodies) | |
645 | { | |
646 | // | |
647 | // Force golden D decay modes | |
648 | // | |
ad720100 | 649 | // K* -> K pi |
710f5272 | 650 | fPythia8->ReadString("313:onMode = off"); |
651 | fPythia8->ReadString("313:onIfAll = 321 211"); | |
948d10f4 | 652 | // for Ds -> Phi pi+ |
710f5272 | 653 | fPythia8->ReadString("333:onMode = off"); |
654 | fPythia8->ReadString("333:onIfAll = 321 321"); | |
948d10f4 | 655 | // for D0 -> rho0 pi+ k- |
710f5272 | 656 | fPythia8->ReadString("113:onMode = off"); |
657 | fPythia8->ReadString("113:onIfAll = 211 211"); | |
948d10f4 | 658 | // for Lambda_c -> Delta++ K- |
710f5272 | 659 | fPythia8->ReadString("2224:onMode = off"); |
660 | fPythia8->ReadString("2224:onIfAll = 2212 211"); | |
00a8ca0b | 661 | // for Lambda_c -> Lambda(1520) K- |
710f5272 | 662 | fPythia8->ReadString("3124:onMode = off"); |
663 | fPythia8->ReadString("3124:onIfAll = 2212 321"); | |
948d10f4 | 664 | |
665 | ||
710f5272 | 666 | fPythia8->ReadString("411:onMode = off"); |
667 | fPythia8->ReadString("421:onMode = off"); | |
668 | fPythia8->ReadString("431:onMode = off"); | |
669 | fPythia8->ReadString("4112:onMode = off"); | |
670 | fPythia8->ReadString("4122:onMode = off"); | |
b7227478 | 671 | |
ad720100 | 672 | // D+/- -> K pi pi |
710f5272 | 673 | fPythia8->ReadString("411:onIfMatch = 321 211 211"); |
d3553100 | 674 | // D+/- -> K* pi |
710f5272 | 675 | fPythia8->ReadString("411:onIfMatch = 313 211"); |
00a8ca0b | 676 | // D0 -> K pi |
710f5272 | 677 | fPythia8->ReadString("421:onIfMatch = 321 211"); |
ad720100 | 678 | |
b7227478 | 679 | if (optUse4Bodies) { |
ad720100 | 680 | // D0 -> K pi pi pi |
710f5272 | 681 | fPythia8->ReadString("421:onIfMatch = 321 211 211 211"); |
ad720100 | 682 | // D0 -> K pi rho |
710f5272 | 683 | fPythia8->ReadString("421:onIfMatch = 321 211 113"); |
00a8ca0b | 684 | // D0 -> K*0 pi pi |
710f5272 | 685 | fPythia8->ReadString("421:onIfMatch = 313 211 211"); |
b7227478 | 686 | } |
948d10f4 | 687 | |
ad720100 | 688 | // D_s -> K K* |
710f5272 | 689 | fPythia8->ReadString("431:onIfMatch = 321 313"); |
ad720100 | 690 | // D_s -> Phi pi |
710f5272 | 691 | fPythia8->ReadString("431:onIfMatch = 333 211"); |
b7227478 | 692 | |
ad720100 | 693 | // Lambda_c -> p K* |
710f5272 | 694 | fPythia8->ReadString("4122:onIfMatch = 2212 313"); |
ad720100 | 695 | // Lambda_c -> Delta K |
710f5272 | 696 | fPythia8->ReadString("4122:onIfMatch = 2224 321"); |
00a8ca0b | 697 | // Lambda_c -> Lambda(1520) pi |
710f5272 | 698 | fPythia8->ReadString("4122:onIfMatch = 3124 211"); |
ad720100 | 699 | // Lambda_c -> p K pi |
710f5272 | 700 | fPythia8->ReadString("4122:onIfMatch = 2212 321 211"); |
00a8ca0b | 701 | // Lambda_c -> Lambda pi |
710f5272 | 702 | fPythia8->ReadString("4122:onIfMatch = 3122 211"); |
b7227478 | 703 | |
948d10f4 | 704 | } |
705 | ||
b584e2f5 | 706 | //___________________________________________________________________________ |
707 | void AliDecayerPythia8::ReadDecayTable() | |
708 | { | |
709 | //to read a decay table (not yet implemented) | |
710 | } | |
711 | ||
712 | ||
713 | //___________________________________________________________________________ | |
714 | void AliDecayerPythia8::AppendParticle(Int_t pdg, TLorentzVector* p) | |
715 | { | |
716 | // Append a particle to the stack | |
717 | fPythia8->Pythia8()->event.append(pdg, 11, 0, 0, p->Px(), p->Py(), p->Pz(), p->E(), p->M()); | |
718 | } | |
719 | ||
720 | ||
721 | //___________________________________________________________________________ | |
722 | void AliDecayerPythia8::ClearEvent() | |
723 | { | |
724 | // Clear the event stack | |
725 | fPythia8->Pythia8()->event.clear(); | |
726 | } | |
727 |