]>
Commit | Line | Data |
---|---|---|
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> | |
22 | #include <TLorentzVector.h> | |
23 | #include <TClonesArray.h> | |
24 | #include <TParticle.h> | |
25 | #include "AliTPythia8.h" | |
26 | #include "AliDecayerPythia8.h" | |
27 | #include "ParticleData.h" | |
28 | ||
29 | ClassImp(AliDecayerPythia8) | |
30 | ||
31 | Bool_t AliDecayerPythia8::fgInit = kFALSE; | |
32 | ||
33 | AliDecayerPythia8::AliDecayerPythia8(): | |
34 | TVirtualMCDecayer(), | |
35 | fPythia8(AliTPythia8::Instance()), | |
36 | fDebug(0), | |
37 | fDecay(kAll), | |
38 | fHeavyFlavour(kTRUE) | |
39 | { | |
40 | // Constructor | |
41 | fPythia8->Pythia8()->readString("SoftQCD:elastic = on"); | |
42 | fPythia8->Pythia8()->init(); | |
43 | } | |
44 | ||
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 | { | |
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; | |
71 | } | |
72 | ||
73 | ||
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) { | |
90 | fPythia8->ReadString(Form("%d:onMode = off", heavy[j])); | |
91 | } else { | |
92 | fPythia8->ReadString(Form("%d:onMode = on", heavy[j])); | |
93 | } | |
94 | } | |
95 | ||
96 | ||
97 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. | |
98 | ||
99 | if (fDecay != kNeutralPion) { | |
100 | fPythia8->ReadString("111:onMode = off"); | |
101 | } else { | |
102 | fPythia8->ReadString("111:onMode = on"); | |
103 | } | |
104 | ||
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"); | |
112 | // .. Force decay channels | |
113 | ForceDecay(); | |
114 | } | |
115 | ||
116 | void AliDecayerPythia8::ForceDecay() | |
117 | { | |
118 | // | |
119 | // Force a particle decay mode | |
120 | // Switch heavy flavour production off if requested | |
121 | if (!fHeavyFlavour) SwitchOffHeavyFlavour(); | |
122 | // | |
123 | Decay_t decay = fDecay; | |
124 | fPythia8->ReadString("HadronLevel:Decay = on"); | |
125 | ||
126 | if (decay == kNoDecayHeavy) return; | |
127 | ||
128 | // | |
129 | // select mode | |
130 | switch (decay) | |
131 | { | |
132 | case kHardMuons: | |
133 | // B0 -> mu X | |
134 | fPythia8->ReadString("511:onMode = off"); | |
135 | fPythia8->ReadString("511:onIfAny = 13 443 100443"); | |
136 | // B+/- -> mu X | |
137 | fPythia8->ReadString("521:onMode = off"); | |
138 | fPythia8->ReadString("521:onIfAny = 13 443 100443"); | |
139 | // Bs -> mu X | |
140 | fPythia8->ReadString("531:onMode = off"); | |
141 | fPythia8->ReadString("531:onIfAny = 13 443 100443"); | |
142 | // Lambda_b -> mu X | |
143 | fPythia8->ReadString("5122:onMode = off"); | |
144 | fPythia8->ReadString("5122:onIfAny = 13 443 100443"); | |
145 | // Sigma_b- -> mu X | |
146 | fPythia8->ReadString("5132:onMode = off"); | |
147 | fPythia8->ReadString("5132:onIfAny = 13 443 100443"); | |
148 | // Sigma_b0 -> mu X | |
149 | fPythia8->ReadString("5232:onMode = off"); | |
150 | fPythia8->ReadString("5232:onIfAny = 13 443 100443"); | |
151 | // Omega_b -> mu X | |
152 | fPythia8->ReadString("5332:onMode = off"); | |
153 | fPythia8->ReadString("5332:onIfAny = 13 443 100443"); | |
154 | // Psi' -> mu+ mu- | |
155 | fPythia8->ReadString("100443:onMode = off"); | |
156 | fPythia8->ReadString("100443:onIfAny = 443"); | |
157 | // Psi -> mu+ mu- | |
158 | fPythia8->ReadString("443:onMode = off"); | |
159 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
160 | // D+/- -> mu X | |
161 | fPythia8->ReadString("411:onMode = off"); | |
162 | fPythia8->ReadString("411:onIfAll = 13"); | |
163 | // D0 -> mu X | |
164 | fPythia8->ReadString("421:onMode = off"); | |
165 | fPythia8->ReadString("421:onIfAll = 13"); | |
166 | // D_s -> mu X | |
167 | fPythia8->ReadString("431:onMode = off"); | |
168 | fPythia8->ReadString("431:onIfAll = 13"); | |
169 | // Lambda_c -> mu X | |
170 | fPythia8->ReadString("4122:onMode = off"); | |
171 | fPythia8->ReadString("4122:onIfAll = 13"); | |
172 | // Sigma_c -> mu X | |
173 | fPythia8->ReadString("4132:onMode = off"); | |
174 | fPythia8->ReadString("4132:onIfAll = 13"); | |
175 | // Sigma_c+ -> mu X | |
176 | fPythia8->ReadString("4232:onMode = off"); | |
177 | fPythia8->ReadString("4232:onIfAll = 13"); | |
178 | // Omega_c -> mu X | |
179 | fPythia8->ReadString("4332:onMode = off"); | |
180 | fPythia8->ReadString("4332:onIfAll = 13"); | |
181 | ||
182 | break; | |
183 | case kChiToJpsiGammaToMuonMuon: | |
184 | // Chi_1c -> J/Psi Gamma | |
185 | fPythia8->ReadString("20443:onMode = off"); | |
186 | fPythia8->ReadString("20443:onIfAll = 443 22"); | |
187 | // Chi_2c -> J/Psi Gamma | |
188 | fPythia8->ReadString("445:onMode = off"); | |
189 | fPythia8->ReadString("445:onIfAll = 443 22"); | |
190 | // J/Psi -> mu+ mu- | |
191 | fPythia8->ReadString("443:onMode = off"); | |
192 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
193 | break; | |
194 | case kChiToJpsiGammaToElectronElectron: | |
195 | // Chi_1c -> J/Psi Gamma | |
196 | fPythia8->ReadString("20443:onMode = off"); | |
197 | fPythia8->ReadString("20443:onIfAll = 443 22"); | |
198 | // Chi_2c -> J/Psi Gamma | |
199 | fPythia8->ReadString("445:onMode = off"); | |
200 | fPythia8->ReadString("445:onIfAll = 443 22"); | |
201 | // J/Psi -> e+ e- | |
202 | fPythia8->ReadString("443:onMode = off"); | |
203 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
204 | break; | |
205 | ||
206 | case kBSemiMuonic: | |
207 | // B0 -> mu X | |
208 | fPythia8->ReadString("511:onMode = off"); | |
209 | fPythia8->ReadString("511:onIfAny = 13"); | |
210 | // B+/- -> mu X | |
211 | fPythia8->ReadString("521:onMode = off"); | |
212 | fPythia8->ReadString("521:onIfAny = 13"); | |
213 | // B_s -> mu X | |
214 | fPythia8->ReadString("531:onMode = off"); | |
215 | fPythia8->ReadString("531:onIfAny = 13"); | |
216 | // Lambda_b -> mu X | |
217 | fPythia8->ReadString("5122:onMode = off"); | |
218 | fPythia8->ReadString("5122:onIfAny = 13"); | |
219 | // Sigma_b -> mu X | |
220 | fPythia8->ReadString("5132:onMode = off"); | |
221 | fPythia8->ReadString("5132:onIfAny = 13"); | |
222 | // Sigma_b0 -> mu X | |
223 | fPythia8->ReadString("5232:onMode = off"); | |
224 | fPythia8->ReadString("5232:onIfAny = 13"); | |
225 | // Omega_b -> mu X | |
226 | fPythia8->ReadString("5332:onMode = off"); | |
227 | fPythia8->ReadString("5332:onIfAny = 13"); | |
228 | break; | |
229 | case kSemiMuonic: | |
230 | // D+- -> mu X | |
231 | fPythia8->ReadString("411:onMode = off"); | |
232 | fPythia8->ReadString("411:onIfAll = 13"); | |
233 | // D0 -> mu X | |
234 | fPythia8->ReadString("421:onMode = off"); | |
235 | fPythia8->ReadString("421:onIfAll = 13"); | |
236 | // D_s -> mu X | |
237 | fPythia8->ReadString("431:onMode = off"); | |
238 | fPythia8->ReadString("431:onIfAll = 13"); | |
239 | // Lambda_c -> mu X | |
240 | fPythia8->ReadString("4122:onMode = off"); | |
241 | fPythia8->ReadString("4122:onIfAll = 13"); | |
242 | // Sigma_c -> mu X | |
243 | fPythia8->ReadString("4132:onMode = off"); | |
244 | fPythia8->ReadString("4132:onIfAll = 13"); | |
245 | // Sigma -> mu X | |
246 | fPythia8->ReadString("4232:onMode = off"); | |
247 | fPythia8->ReadString("4232:onIfAll = 13"); | |
248 | // Omega_c -> mu X | |
249 | fPythia8->ReadString("4332:onMode = off"); | |
250 | fPythia8->ReadString("4332:onIfAll = 13"); | |
251 | // B0 -> mu X | |
252 | fPythia8->ReadString("511:onMode = off"); | |
253 | fPythia8->ReadString("511:onIfAny = 13"); | |
254 | // B+/- -> mu X | |
255 | fPythia8->ReadString("521:onMode = off"); | |
256 | fPythia8->ReadString("521:onIfAny = 13"); | |
257 | // B_s -> mu X | |
258 | fPythia8->ReadString("531:onMode = off"); | |
259 | fPythia8->ReadString("531:onIfAny = 13"); | |
260 | // Lambda_c -> mu X | |
261 | fPythia8->ReadString("5122:onMode = off"); | |
262 | fPythia8->ReadString("5122:onIfAny = 13"); | |
263 | // Sigma_c -> mu X | |
264 | fPythia8->ReadString("5132:onMode = off"); | |
265 | fPythia8->ReadString("5132:onIfAny = 13"); | |
266 | // Sigma_c -> mu X | |
267 | fPythia8->ReadString("5232:onMode = off"); | |
268 | fPythia8->ReadString("5232:onIfAny = 13"); | |
269 | // Omega_c -> mu X | |
270 | fPythia8->ReadString("5332:onMode = off"); | |
271 | fPythia8->ReadString("5332:onIfAny = 13"); | |
272 | ||
273 | break; | |
274 | case kJpsiDiMuon: | |
275 | // J/Psi-> mu+ mu- | |
276 | fPythia8->ReadString("443:onMode = off"); | |
277 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
278 | break; | |
279 | case kDiMuon: | |
280 | // Rho -> mu+ mu- | |
281 | fPythia8->ReadString("113:onMode = off"); | |
282 | fPythia8->ReadString("113:onIfAll = 13 13"); | |
283 | // Eta-> mu+ mu- | |
284 | fPythia8->ReadString("221:onMode = off"); | |
285 | fPythia8->ReadString("221:onIfAll = 13 13"); | |
286 | // omega-> mu+ mu- | |
287 | fPythia8->ReadString("223:onMode = off"); | |
288 | fPythia8->ReadString("223:onIfAll = 13 13"); | |
289 | // phi-> mu+ mu- | |
290 | fPythia8->ReadString("333:onMode = off"); | |
291 | fPythia8->ReadString("333:onIfAll = 13 13"); | |
292 | // J/Psi-> mu+ mu- | |
293 | fPythia8->ReadString("443:onMode = off"); | |
294 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
295 | // Psi'-> mu+ mu- | |
296 | fPythia8->ReadString("100443:onMode = off"); | |
297 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
298 | // Ups-> mu+ mu- | |
299 | fPythia8->ReadString("553:onMode = off"); | |
300 | fPythia8->ReadString("553:onIfAll = 13 13"); | |
301 | // Ups'-> mu+ mu- | |
302 | fPythia8->ReadString("100553:onMode = off"); | |
303 | fPythia8->ReadString("100553:onIfAll = 13 13"); | |
304 | // Ups''-> mu+ mu- | |
305 | fPythia8->ReadString("200553:onMode = off"); | |
306 | fPythia8->ReadString("200553:onIfAll = 13 13"); | |
307 | break; | |
308 | case kBSemiElectronic: | |
309 | // B0 - > e+ e- | |
310 | fPythia8->ReadString("511:onMode = off"); | |
311 | fPythia8->ReadString("511:onIfAny = 11"); | |
312 | // B+- -> e+ e- | |
313 | fPythia8->ReadString("521:onMode = off"); | |
314 | fPythia8->ReadString("521:onIfAny = 11"); | |
315 | // B_s -> e+ e- | |
316 | fPythia8->ReadString("531:onMode = off"); | |
317 | fPythia8->ReadString("531:onIfAny = 11"); | |
318 | // Lambda_b -> e+ e- | |
319 | fPythia8->ReadString("5122:onMode = off"); | |
320 | fPythia8->ReadString("5122:onIfAny = 11"); | |
321 | // Sigma_b -> e+ e- | |
322 | fPythia8->ReadString("5132:onMode = off"); | |
323 | fPythia8->ReadString("5132:onIfAny = 11"); | |
324 | // Sigma_b -> e+ e- | |
325 | fPythia8->ReadString("5232:onMode = off"); | |
326 | fPythia8->ReadString("5232:onIfAny = 11"); | |
327 | // Omega_b ->e+ e- | |
328 | fPythia8->ReadString("5332:onMode = off"); | |
329 | fPythia8->ReadString("5332:onIfAny = 11"); | |
330 | break; | |
331 | case kSemiElectronic: | |
332 | // D+/- -> e X | |
333 | fPythia8->ReadString("411:onMode = off"); | |
334 | fPythia8->ReadString("411:onIfAll = 11"); | |
335 | // D0 -> e X | |
336 | fPythia8->ReadString("421:onMode = off"); | |
337 | fPythia8->ReadString("421:onIfAll = 11"); | |
338 | // D_s ->e X | |
339 | fPythia8->ReadString("431:onMode = off"); | |
340 | fPythia8->ReadString("431:onIfAll = 11"); | |
341 | // Lambda_c -> e X | |
342 | fPythia8->ReadString("4122:onMode = off"); | |
343 | fPythia8->ReadString("4122:onIfAll = 11"); | |
344 | // Sigma_c -> e X | |
345 | fPythia8->ReadString("4132:onMode = off"); | |
346 | fPythia8->ReadString("4132:onIfAll = 11"); | |
347 | // Sigma_c -> e X | |
348 | fPythia8->ReadString("4232:onMode = off"); | |
349 | fPythia8->ReadString("4232:onIfAll = 11"); | |
350 | // Omega_c -> e X | |
351 | fPythia8->ReadString("4332:onMode = off"); | |
352 | fPythia8->ReadString("4332:onIfAll = 11"); | |
353 | // B0 -> e X | |
354 | fPythia8->ReadString("511:onMode = off"); | |
355 | fPythia8->ReadString("511:onIfAny = 11"); | |
356 | // B+/- -> e X | |
357 | fPythia8->ReadString("521:onMode = off"); | |
358 | fPythia8->ReadString("521:onIfAny = 11"); | |
359 | // B_s -> e X | |
360 | fPythia8->ReadString("531:onMode = off"); | |
361 | fPythia8->ReadString("531:onIfAny = 11"); | |
362 | // Lambda_b -> e X | |
363 | fPythia8->ReadString("5122:onMode = off"); | |
364 | fPythia8->ReadString("5122:onIfAny = 11"); | |
365 | // Sigma_b -> e X | |
366 | fPythia8->ReadString("5132:onMode = off"); | |
367 | fPythia8->ReadString("5132:onIfAny = 11"); | |
368 | // Sigma_b -> e X | |
369 | fPythia8->ReadString("5232:onMode = off"); | |
370 | fPythia8->ReadString("5232:onIfAny = 11"); | |
371 | // Omega_b -> e X | |
372 | fPythia8->ReadString("5332:onMode = off"); | |
373 | fPythia8->ReadString("5332:onIfAny = 11"); | |
374 | break; | |
375 | case kDiElectron: | |
376 | // Rho -> e+e- | |
377 | fPythia8->ReadString("113:onMode = off"); | |
378 | fPythia8->ReadString("113:onIfAll = 11 11"); | |
379 | // Eta -> e+e- | |
380 | fPythia8->ReadString("221:onMode = off"); | |
381 | fPythia8->ReadString("221:onIfAll = 11 11"); | |
382 | // omega -> e+e- | |
383 | fPythia8->ReadString("223:onMode = off"); | |
384 | fPythia8->ReadString("223:onIfAll = 11 11"); | |
385 | // phi -> e+e- | |
386 | fPythia8->ReadString("333:onMode = off"); | |
387 | fPythia8->ReadString("333:onIfAll = 11 11"); | |
388 | // J/Psi -> e+e- | |
389 | fPythia8->ReadString("443:onMode = off"); | |
390 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
391 | // Psi' -> e+e- | |
392 | fPythia8->ReadString("100443:onMode = off"); | |
393 | fPythia8->ReadString("100443:onIfAll = 11 11"); | |
394 | // Ups -> e+e- | |
395 | fPythia8->ReadString("553:onMode = off"); | |
396 | fPythia8->ReadString("553:onIfAll = 11 11"); | |
397 | // Ups' -> e+e- | |
398 | fPythia8->ReadString("100553:onMode = off"); | |
399 | fPythia8->ReadString("100553:onIfAll = 11 11"); | |
400 | // Ups'' -> e+e- | |
401 | fPythia8->ReadString("200553:onMode = off"); | |
402 | fPythia8->ReadString("200553:onIfAll = 11 11"); | |
403 | break; | |
404 | case kBJpsiDiMuon: | |
405 | // B0 -> J/Psi (Psi') X | |
406 | fPythia8->ReadString("511:onMode = off"); | |
407 | fPythia8->ReadString("511:onIfAny = 443 100443"); | |
408 | // B+/- -> J/Psi (Psi') X | |
409 | fPythia8->ReadString("521:onMode = off"); | |
410 | fPythia8->ReadString("521:onIfAny = 443 100443"); | |
411 | // B_s -> J/Psi (Psi') X | |
412 | fPythia8->ReadString("531:onMode = off"); | |
413 | fPythia8->ReadString("531:onIfAny = 443 100443"); | |
414 | // Lambda_b -> J/Psi (Psi') X | |
415 | fPythia8->ReadString("5122:onMode = off"); | |
416 | fPythia8->ReadString("5122:onIfAny = 443 100443"); | |
417 | // | |
418 | // J/Psi -> mu+ mu- | |
419 | fPythia8->ReadString("443:onMode = off"); | |
420 | fPythia8->ReadString("443:onIfAll = 13 13"); | |
421 | // Psi' -> mu+ mu- | |
422 | fPythia8->ReadString("100443:onMode = off"); | |
423 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
424 | break; | |
425 | case kBPsiPrimeDiMuon: | |
426 | // B0 -> Psi' X | |
427 | fPythia8->ReadString("511:onMode = off"); | |
428 | fPythia8->ReadString("511:onIfAny = 100443"); | |
429 | // B+/- -> Psi' X | |
430 | fPythia8->ReadString("521:onMode = off"); | |
431 | fPythia8->ReadString("521:onIfAny = 100443"); | |
432 | // B_s -> Psi' X | |
433 | fPythia8->ReadString("531:onMode = off"); | |
434 | fPythia8->ReadString("531:onIfAny = 100443"); | |
435 | // Lambda_b -> Psi' X | |
436 | fPythia8->ReadString("5122:onMode = off"); | |
437 | fPythia8->ReadString("5122:onIfAny = 100443"); | |
438 | // | |
439 | // Psi' -> mu+ mu- | |
440 | fPythia8->ReadString("100443:onMode = off"); | |
441 | fPythia8->ReadString("100443:onIfAll = 13 13"); | |
442 | break; | |
443 | case kBJpsiDiElectron: | |
444 | // B0 -> Psi X | |
445 | fPythia8->ReadString("511:onMode = off"); | |
446 | fPythia8->ReadString("511:onIfAny = 443"); | |
447 | // B+/- -> Psi X | |
448 | fPythia8->ReadString("521:onMode = off"); | |
449 | fPythia8->ReadString("521:onIfAny = 443"); | |
450 | // B_s -> Psi X | |
451 | fPythia8->ReadString("531:onMode = off"); | |
452 | fPythia8->ReadString("531:onIfAny = 443"); | |
453 | // Lambda_b -> Psi X | |
454 | fPythia8->ReadString("5122:onMode = off"); | |
455 | fPythia8->ReadString("5122:onIfAny = 443"); | |
456 | // | |
457 | // Psi -> mu+ mu- | |
458 | fPythia8->ReadString("443:onMode = off"); | |
459 | fPythia8->ReadString("443:onIfAll = 11 11"); | |
460 | ||
461 | break; | |
462 | case kBJpsi: | |
463 | // B0 -> Psi X | |
464 | fPythia8->ReadString("511:onMode = off"); | |
465 | fPythia8->ReadString("511:onIfAny = 443"); | |
466 | // B+/- -> Psi X | |
467 | fPythia8->ReadString("521:onMode = off"); | |
468 | fPythia8->ReadString("521:onIfAny = 443"); | |
469 | // B_s -> Psi X | |
470 | fPythia8->ReadString("531:onMode = off"); | |
471 | fPythia8->ReadString("531:onIfAny = 443"); | |
472 | // Lambda_b -> Psi X | |
473 | fPythia8->ReadString("5122:onMode = off"); | |
474 | fPythia8->ReadString("5122:onIfAny = 443"); | |
475 | break; | |
476 | case kBPsiPrimeDiElectron: | |
477 | // B0 -> Psi' X | |
478 | fPythia8->ReadString("511:onMode = off"); | |
479 | fPythia8->ReadString("511:onIfAny = 100443"); | |
480 | // B+/- -> Psi' X | |
481 | fPythia8->ReadString("521:onMode = off"); | |
482 | fPythia8->ReadString("521:onIfAny = 100443"); | |
483 | // B_s -> Psi' X | |
484 | fPythia8->ReadString("531:onMode = off"); | |
485 | fPythia8->ReadString("531:onIfAny = 100443"); | |
486 | // Lambda_b -> Psi' X | |
487 | fPythia8->ReadString("5122:onMode = off"); | |
488 | fPythia8->ReadString("5122:onIfAny = 100443"); | |
489 | // | |
490 | // Psi' -> mu+ mu- | |
491 | fPythia8->ReadString("100443:onMode = off"); | |
492 | fPythia8->ReadString("100443:onIfAll = 11 11"); | |
493 | break; | |
494 | case kPiToMu: | |
495 | // pi -> mu nu | |
496 | fPythia8->ReadString("211:onMode = off"); | |
497 | fPythia8->ReadString("211:onIfAny = 13"); | |
498 | break; | |
499 | case kKaToMu: | |
500 | // K -> mu nu | |
501 | fPythia8->ReadString("321:onMode = off"); | |
502 | fPythia8->ReadString("321:onIfAny = 13"); | |
503 | break; | |
504 | case kAllMuonic: | |
505 | // pi/K -> mu | |
506 | fPythia8->ReadString("211:onMode = off"); | |
507 | fPythia8->ReadString("211:onIfAny = 13"); | |
508 | fPythia8->ReadString("321:onMode = off"); | |
509 | fPythia8->ReadString("321:onIfAny = 13"); | |
510 | break; | |
511 | case kWToMuon: | |
512 | // W -> mu X | |
513 | fPythia8->ReadString("24:onMode = off"); | |
514 | fPythia8->ReadString("24:onIfAny = 13"); | |
515 | break; | |
516 | case kWToCharm: | |
517 | // W -> c X | |
518 | fPythia8->ReadString("24:onMode = off"); | |
519 | fPythia8->ReadString("24:onIfAny = 4"); | |
520 | break; | |
521 | case kWToCharmToMuon: | |
522 | // W -> c X | |
523 | fPythia8->ReadString("24:onMode = off"); | |
524 | fPythia8->ReadString("24:onIfAny = 4"); | |
525 | // D+- -> mu X | |
526 | fPythia8->ReadString("411:onMode = off"); | |
527 | fPythia8->ReadString("411:onIfAll = 13"); | |
528 | // D0 -> mu X | |
529 | fPythia8->ReadString("421:onMode = off"); | |
530 | fPythia8->ReadString("421:onIfAll = 13"); | |
531 | // D_s -> mu X | |
532 | fPythia8->ReadString("431:onMode = off"); | |
533 | fPythia8->ReadString("431:onIfAll = 13"); | |
534 | // Lambda_c -> mu X | |
535 | fPythia8->ReadString("4122:onMode = off"); | |
536 | fPythia8->ReadString("4122:onIfAll = 13"); | |
537 | // Sigma_c -> mu X | |
538 | fPythia8->ReadString("4132:onMode = off"); | |
539 | fPythia8->ReadString("4132:onIfAll = 13"); | |
540 | // Sigma_c -> mu X | |
541 | fPythia8->ReadString("4232:onMode = off"); | |
542 | fPythia8->ReadString("4232:onIfAll = 13"); | |
543 | // Omega_c -> mu X | |
544 | fPythia8->ReadString("4332:onMode = off"); | |
545 | fPythia8->ReadString("4332:onIfAll = 13"); | |
546 | break; | |
547 | case kZDiMuon: | |
548 | // Z -> mu+ mu- | |
549 | fPythia8->ReadString("23:onMode = off"); | |
550 | fPythia8->ReadString("23:onIfAll = 13 13"); | |
551 | break; | |
552 | case kZDiElectron: | |
553 | // Z -> e+ e- | |
554 | fPythia8->ReadString("23:onMode = off"); | |
555 | fPythia8->ReadString("23:onIfAll = 11 11"); | |
556 | break; | |
557 | case kHadronicD: | |
558 | ForceHadronicD(1); | |
559 | break; | |
560 | case kHadronicDWithout4Bodies: | |
561 | ForceHadronicD(0); | |
562 | break; | |
563 | case kPhiKK: | |
564 | // Phi-> K+ K- | |
565 | fPythia8->ReadString("333:onMode = off"); | |
566 | fPythia8->ReadString("333:onIfAll = 321 321"); | |
567 | break; | |
568 | case kOmega: | |
569 | // Omega -> Lambda K | |
570 | fPythia8->ReadString("3334:onMode = off"); | |
571 | fPythia8->ReadString("3334:onIfAll = 3122 321 "); | |
572 | break; | |
573 | case kLambda: | |
574 | // Lambda -> p pi- | |
575 | fPythia8->ReadString("3122:onMode = off"); | |
576 | fPythia8->ReadString("3122:onIfAll = 2212 211 "); | |
577 | break; | |
578 | case kBeautyUpgrade: | |
579 | fPythia8->ReadString("5122:onMode = off"); | |
580 | fPythia8->ReadString("4122:onMode = off"); | |
581 | fPythia8->ReadString("5122:onIfAll = 4122"); | |
582 | fPythia8->ReadString("4122:onIfAll = 3122"); | |
583 | break; | |
584 | case kAll: | |
585 | break; | |
586 | case kNoDecay: | |
587 | fPythia8->ReadString("HadronLevel:Decay = off"); | |
588 | break; | |
589 | case kNoDecayHeavy: | |
590 | case kNoDecayBeauty: | |
591 | case kNeutralPion: | |
592 | case kPsiPrimeJpsiDiElectron: | |
593 | case kElectronEM: | |
594 | case kGammaEM: | |
595 | case kDiElectronEM: | |
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 | ||
604 | Pythia8::Pythia* thePythia = fPythia8->Pythia8(); | |
605 | Pythia8::ParticleData & table = thePythia->particleData; | |
606 | Pythia8::ParticleDataEntry* pd = table.particleDataEntryPtr(ipart); | |
607 | ||
608 | Int_t nc = pd->sizeChannels(); | |
609 | Float_t br = 0.; | |
610 | // | |
611 | // Loop over decay channels | |
612 | for (Int_t ic = 0; ic < nc; ic++) { | |
613 | Pythia8::DecayChannel& decCh = pd->channel(ic); | |
614 | for (Int_t i = 0; i < decCh.multiplicity(); i++) { | |
615 | br += decCh.bRatio(); | |
616 | } | |
617 | } | |
618 | return (br); | |
619 | } | |
620 | ||
621 | ||
622 | Float_t AliDecayerPythia8::GetLifetime(Int_t kf) | |
623 | { | |
624 | // Return lifetime of particle | |
625 | Pythia8::Pythia* thePythia = fPythia8->Pythia8(); | |
626 | Pythia8::ParticleData& table = thePythia->particleData; | |
627 | Float_t tau = table.tau0(kf); | |
628 | return (tau); | |
629 | } | |
630 | ||
631 | void AliDecayerPythia8::SwitchOffHeavyFlavour() | |
632 | { | |
633 | // Switch off heavy flavour production | |
634 | // | |
635 | // Maximum number of quark flavours used in pdf | |
636 | fPythia8->ReadString("PDFinProcess:nQuarkIn = 3"); | |
637 | // Maximum number of flavors that can be used in showers | |
638 | fPythia8->ReadString("SpaceShower:nQuarkIn = 3"); | |
639 | fPythia8->ReadString("TimeShower:nGammaToQuark = 3"); | |
640 | fPythia8->ReadString("TimeShower:nGluonToQuark = 3"); | |
641 | } | |
642 | ||
643 | ||
644 | void AliDecayerPythia8::ForceHadronicD(Int_t optUse4Bodies) | |
645 | { | |
646 | // | |
647 | // Force golden D decay modes | |
648 | // | |
649 | // K* -> K pi | |
650 | fPythia8->ReadString("313:onMode = off"); | |
651 | fPythia8->ReadString("313:onIfAll = 321 211"); | |
652 | // for Ds -> Phi pi+ | |
653 | fPythia8->ReadString("333:onMode = off"); | |
654 | fPythia8->ReadString("333:onIfAll = 321 321"); | |
655 | // for D0 -> rho0 pi+ k- | |
656 | fPythia8->ReadString("113:onMode = off"); | |
657 | fPythia8->ReadString("113:onIfAll = 211 211"); | |
658 | // for Lambda_c -> Delta++ K- | |
659 | fPythia8->ReadString("2224:onMode = off"); | |
660 | fPythia8->ReadString("2224:onIfAll = 2212 211"); | |
661 | // for Lambda_c -> Lambda(1520) K- | |
662 | fPythia8->ReadString("3124:onMode = off"); | |
663 | fPythia8->ReadString("3124:onIfAll = 2212 321"); | |
664 | ||
665 | ||
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"); | |
671 | ||
672 | // D+/- -> K pi pi | |
673 | fPythia8->ReadString("411:onIfMatch = 321 211 211"); | |
674 | // D+/- -> K* pi | |
675 | fPythia8->ReadString("411:onIfMatch = 313 211"); | |
676 | // D0 -> K pi | |
677 | fPythia8->ReadString("421:onIfMatch = 321 211"); | |
678 | ||
679 | if (optUse4Bodies) { | |
680 | // D0 -> K pi pi pi | |
681 | fPythia8->ReadString("421:onIfMatch = 321 211 211 211"); | |
682 | // D0 -> K pi rho | |
683 | fPythia8->ReadString("421:onIfMatch = 321 211 113"); | |
684 | // D0 -> K*0 pi pi | |
685 | fPythia8->ReadString("421:onIfMatch = 313 211 211"); | |
686 | } | |
687 | ||
688 | // D_s -> K K* | |
689 | fPythia8->ReadString("431:onIfMatch = 321 313"); | |
690 | // D_s -> Phi pi | |
691 | fPythia8->ReadString("431:onIfMatch = 333 211"); | |
692 | ||
693 | // Lambda_c -> p K* | |
694 | fPythia8->ReadString("4122:onIfMatch = 2212 313"); | |
695 | // Lambda_c -> Delta K | |
696 | fPythia8->ReadString("4122:onIfMatch = 2224 321"); | |
697 | // Lambda_c -> Lambda(1520) pi | |
698 | fPythia8->ReadString("4122:onIfMatch = 3124 211"); | |
699 | // Lambda_c -> p K pi | |
700 | fPythia8->ReadString("4122:onIfMatch = 2212 321 211"); | |
701 | // Lambda_c -> Lambda pi | |
702 | fPythia8->ReadString("4122:onIfMatch = 3122 211"); | |
703 | ||
704 | } | |
705 | ||
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 |