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4c039060 | 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 | /* | |
17 | $Log$ | |
438003bb | 18 | Revision 1.59 2002/07/19 14:35:36 morsch |
19 | Count total number of trials. Print mean Q, x1, x2. | |
20 | ||
8a8f459f | 21 | Revision 1.58 2002/07/17 10:04:09 morsch |
22 | SetYHard method added. | |
23 | ||
35967770 | 24 | Revision 1.57 2002/05/22 13:22:53 morsch |
25 | Process kPyMbNonDiffr added. | |
26 | ||
5f42cc16 | 27 | Revision 1.56 2002/04/26 10:30:01 morsch |
28 | Option kPyBeautyPbMNR added. (N. Carrer). | |
29 | ||
c0acde67 | 30 | Revision 1.55 2002/04/17 10:23:56 morsch |
31 | Coding Rule violations corrected. | |
32 | ||
6d4dd317 | 33 | Revision 1.54 2002/03/28 11:49:10 morsch |
34 | Pass status code in SetTrack. | |
35 | ||
5ec84200 | 36 | Revision 1.53 2002/03/25 14:51:13 morsch |
37 | New stack-fill and count options introduced (N. Carrer). | |
38 | ||
0d7c70a0 | 39 | Revision 1.51 2002/03/06 08:46:57 morsch |
40 | - Loop until np-1 | |
41 | - delete dyn. alloc. arrays (N. Carrer) | |
42 | ||
b9817493 | 43 | Revision 1.50 2002/03/03 13:48:50 morsch |
44 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
45 | NLO calculations (Nicola Carrer). | |
46 | ||
fbd1348b | 47 | Revision 1.49 2002/02/08 16:50:50 morsch |
48 | Add name and title in constructor. | |
49 | ||
8b31bfac | 50 | Revision 1.48 2001/12/20 11:44:28 morsch |
51 | Add kinematic bias for direct gamma production. | |
52 | ||
b2bb450d | 53 | Revision 1.47 2001/12/19 14:45:00 morsch |
54 | Store number of trials in header. | |
55 | ||
fd8fb861 | 56 | Revision 1.46 2001/12/19 10:36:19 morsch |
57 | Add possibility if jet kinematic biasing. | |
58 | ||
988b118b | 59 | Revision 1.45 2001/11/28 08:06:52 morsch |
60 | Use fMaxLifeTime parameter. | |
61 | ||
8cdfd303 | 62 | Revision 1.44 2001/11/27 13:13:07 morsch |
63 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
64 | It can be set via SetMaximumLifetime(..). | |
65 | ||
47fc6bd5 | 66 | Revision 1.43 2001/10/21 18:35:56 hristov |
67 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
68 | ||
2685bf00 | 69 | Revision 1.42 2001/10/15 08:21:55 morsch |
70 | Vertex truncation settings moved to AliGenMC. | |
71 | ||
4c07486d | 72 | Revision 1.41 2001/10/08 08:45:42 morsch |
73 | Possibility of vertex cut added. | |
74 | ||
a0b2b296 | 75 | Revision 1.40 2001/09/25 11:30:23 morsch |
76 | Pass event vertex to header. | |
77 | ||
c5d36e84 | 78 | Revision 1.39 2001/07/27 17:09:36 morsch |
79 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
80 | to delegate either to local stack or to stack owned by AliRun. | |
81 | (Piotr Skowronski, A.M.) | |
82 | ||
a99cf51f | 83 | Revision 1.38 2001/07/13 10:58:54 morsch |
84 | - Some coded moved to AliGenMC | |
85 | - Improved handling of secondary vertices. | |
86 | ||
fff02fee | 87 | Revision 1.37 2001/06/28 11:17:28 morsch |
88 | SetEventListRange setter added. Events in specified range are listed for | |
89 | debugging. (Yuri Kharlov) | |
90 | ||
11dfaf8d | 91 | Revision 1.36 2001/03/30 07:05:49 morsch |
92 | Final print-out in finish run. | |
93 | Write parton system for jet-production (preliminary solution). | |
94 | ||
9be6226f | 95 | Revision 1.35 2001/03/09 13:03:40 morsch |
96 | Process_t and Struc_Func_t moved to AliPythia.h | |
97 | ||
f1a48a38 | 98 | Revision 1.34 2001/02/14 15:50:40 hristov |
99 | The last particle in event marked using SetHighWaterMark | |
100 | ||
28adac24 | 101 | Revision 1.33 2001/01/30 09:23:12 hristov |
102 | Streamers removed (R.Brun) | |
103 | ||
a8a6107b | 104 | Revision 1.32 2001/01/26 19:55:51 hristov |
105 | Major upgrade of AliRoot code | |
106 | ||
2ab0c725 | 107 | Revision 1.31 2001/01/17 10:54:31 hristov |
108 | Better protection against FPE | |
109 | ||
0f9e52a3 | 110 | Revision 1.30 2000/12/18 08:55:35 morsch |
111 | Make AliPythia dependent generartors work with new scheme of random number generation | |
112 | ||
3356c022 | 113 | Revision 1.29 2000/12/04 11:22:03 morsch |
114 | Init of sRandom as in 1.15 | |
115 | ||
097ec7c1 | 116 | Revision 1.28 2000/12/02 11:41:39 morsch |
117 | Use SetRandom() to initialize random number generator in constructor. | |
118 | ||
1ed25e11 | 119 | Revision 1.27 2000/11/30 20:29:02 morsch |
120 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
121 | ||
ad1df918 | 122 | Revision 1.26 2000/11/30 07:12:50 alibrary |
123 | Introducing new Rndm and QA classes | |
124 | ||
65fb704d | 125 | Revision 1.25 2000/10/18 19:11:27 hristov |
126 | Division by zero fixed | |
127 | ||
919c2096 | 128 | Revision 1.24 2000/09/18 10:41:35 morsch |
129 | Add possibility to use nuclear structure functions from PDF library V8. | |
130 | ||
811826d8 | 131 | Revision 1.23 2000/09/14 14:05:40 morsch |
132 | dito | |
133 | ||
819f84ad | 134 | Revision 1.22 2000/09/14 14:02:22 morsch |
135 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
136 | - Correct handling of fForceDecay == all. | |
137 | ||
4451ef92 | 138 | Revision 1.21 2000/09/12 14:14:55 morsch |
139 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
140 | ||
00d6ce7d | 141 | Revision 1.20 2000/09/06 14:29:33 morsch |
142 | Use AliPythia for event generation an AliDecayPythia for decays. | |
143 | Correct handling of "nodecay" option | |
144 | ||
18edb254 | 145 | Revision 1.19 2000/07/11 18:24:56 fca |
146 | Coding convention corrections + few minor bug fixes | |
147 | ||
aee8290b | 148 | Revision 1.18 2000/06/30 12:40:34 morsch |
149 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
150 | Geant units (cm). | |
151 | ||
1512e357 | 152 | Revision 1.17 2000/06/09 20:34:07 morsch |
153 | All coding rule violations except RS3 corrected | |
154 | ||
f87cfe57 | 155 | Revision 1.16 2000/05/15 15:04:20 morsch |
156 | The full event is written for fNtrack = -1 | |
157 | Coding rule violations corrected. | |
158 | ||
5ddeb374 | 159 | Revision 1.15 2000/04/26 10:14:24 morsch |
160 | Particles array has one entry more than pythia particle list. Upper bound of | |
161 | particle loop changed to np-1 (R. Guernane, AM) | |
162 | ||
2a0e6f5b | 163 | Revision 1.14 2000/04/05 08:36:13 morsch |
164 | Check status code of particles in Pythia event | |
165 | to avoid double counting as partonic state and final state particle. | |
166 | ||
23211d3e | 167 | Revision 1.13 1999/11/09 07:38:48 fca |
168 | Changes for compatibility with version 2.23 of ROOT | |
169 | ||
084c1b4a | 170 | Revision 1.12 1999/11/03 17:43:20 fca |
171 | New version from G.Martinez & A.Morsch | |
172 | ||
886b6f73 | 173 | Revision 1.11 1999/09/29 09:24:14 fca |
174 | Introduction of the Copyright and cvs Log | |
4c039060 | 175 | */ |
176 | ||
6d4dd317 | 177 | // |
178 | // Generator using the TPythia interface (via AliPythia) | |
179 | // to generate pp collisions. | |
180 | // Using SetNuclei() also nuclear modifications to the structure functions | |
181 | // can be taken into account. This makes, of course, only sense for the | |
182 | // generation of the products of hard processes (heavy flavor, jets ...) | |
183 | // | |
184 | // andreas.morsch@cern.ch | |
185 | // | |
186 | ||
187 | ||
fe4da5cc | 188 | #include "AliGenPythia.h" |
fff02fee | 189 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 190 | #include "AliDecayerPythia.h" |
fe4da5cc | 191 | #include "AliRun.h" |
192 | #include "AliPythia.h" | |
18edb254 | 193 | #include "AliPDG.h" |
1578254f | 194 | #include <TParticle.h> |
18edb254 | 195 | #include <TSystem.h> |
f87cfe57 | 196 | |
fe4da5cc | 197 | ClassImp(AliGenPythia) |
198 | ||
199 | AliGenPythia::AliGenPythia() | |
fff02fee | 200 | :AliGenMC() |
fe4da5cc | 201 | { |
18edb254 | 202 | // Default Constructor |
2685bf00 | 203 | fParticles = 0; |
204 | fPythia = 0; | |
988b118b | 205 | fDecayer = new AliDecayerPythia(); |
11dfaf8d | 206 | SetEventListRange(); |
988b118b | 207 | SetJetPhiRange(); |
208 | SetJetEtaRange(); | |
fe4da5cc | 209 | } |
210 | ||
211 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 212 | :AliGenMC(npart) |
fe4da5cc | 213 | { |
214 | // default charm production at 5. 5 TeV | |
215 | // semimuonic decay | |
216 | // structure function GRVHO | |
217 | // | |
8b31bfac | 218 | fName = "Pythia"; |
219 | fTitle= "Particle Generator using PYTHIA"; | |
fe4da5cc | 220 | fXsection = 0.; |
811826d8 | 221 | fNucA1=0; |
222 | fNucA2=0; | |
fe4da5cc | 223 | SetProcess(); |
224 | SetStrucFunc(); | |
886b6f73 | 225 | SetForceDecay(); |
fe4da5cc | 226 | SetPtHard(); |
8a8f459f | 227 | SetYHard(); |
fe4da5cc | 228 | SetEnergyCMS(); |
18edb254 | 229 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 230 | // Set random number generator |
097ec7c1 | 231 | sRandom=fRandom; |
fff02fee | 232 | fFlavorSelect = 0; |
233 | // Produced particles | |
234 | fParticles = new TClonesArray("TParticle",1000); | |
c5d36e84 | 235 | fEventVertex.Set(3); |
988b118b | 236 | SetEventListRange(); |
237 | SetJetPhiRange(); | |
238 | SetJetEtaRange(); | |
719b6b8a | 239 | // Options determining what to keep in the stack (Heavy flavour generation) |
240 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor | |
241 | fFeedDownOpt = kTRUE; // allow feed down from higher family | |
242 | // Fragmentation on/off | |
243 | fFragmentation = kTRUE; | |
244 | // Default counting mode | |
245 | fCountMode = kCountAll; | |
fe4da5cc | 246 | } |
247 | ||
f87cfe57 | 248 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
249 | { | |
250 | // copy constructor | |
6d4dd317 | 251 | Pythia.Copy(*this); |
f87cfe57 | 252 | } |
253 | ||
fe4da5cc | 254 | AliGenPythia::~AliGenPythia() |
255 | { | |
5ddeb374 | 256 | // Destructor |
fe4da5cc | 257 | } |
258 | ||
11dfaf8d | 259 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
260 | { | |
261 | // Set a range of event numbers, for which a table | |
262 | // of generated particle will be printed | |
263 | fDebugEventFirst = eventFirst; | |
264 | fDebugEventLast = eventLast; | |
265 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
266 | } | |
267 | ||
fe4da5cc | 268 | void AliGenPythia::Init() |
269 | { | |
5ddeb374 | 270 | // Initialisation |
18edb254 | 271 | SetMC(AliPythia::Instance()); |
fe4da5cc | 272 | fPythia=(AliPythia*) fgMCEvGen; |
273 | // | |
274 | fParentWeight=1./Float_t(fNpart); | |
275 | // | |
276 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 277 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 278 | fDecayer->Init(); |
00d6ce7d | 279 | |
18edb254 | 280 | |
fe4da5cc | 281 | fPythia->SetCKIN(3,fPtHardMin); |
35967770 | 282 | fPythia->SetCKIN(4,fPtHardMax); |
283 | fPythia->SetCKIN(7,fYHardMin); | |
284 | fPythia->SetCKIN(8,fYHardMax); | |
285 | ||
811826d8 | 286 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
719b6b8a | 287 | // Fragmentation? |
288 | if (fFragmentation) { | |
289 | fPythia->SetMSTP(111,1); | |
290 | } else { | |
291 | fPythia->SetMSTP(111,0); | |
292 | } | |
293 | ||
fe4da5cc | 294 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 295 | |
296 | // fPythia->Pylist(0); | |
297 | // fPythia->Pystat(2); | |
fe4da5cc | 298 | // Parent and Children Selection |
299 | switch (fProcess) | |
300 | { | |
f1a48a38 | 301 | case kPyCharm: |
f1a48a38 | 302 | case kPyCharmUnforced: |
fbd1348b | 303 | case kPyCharmPbMNR: |
b2bb450d | 304 | fParentSelect[0] = 411; |
305 | fParentSelect[1] = 421; | |
306 | fParentSelect[2] = 431; | |
307 | fParentSelect[3] = 4122; | |
8b31bfac | 308 | fFlavorSelect = 4; |
fe4da5cc | 309 | break; |
719b6b8a | 310 | case kPyD0PbMNR: |
311 | fParentSelect[0] = 421; | |
5f42cc16 | 312 | fFlavorSelect = 4; |
719b6b8a | 313 | break; |
f1a48a38 | 314 | case kPyBeauty: |
c0acde67 | 315 | case kPyBeautyPbMNR: |
fff02fee | 316 | fParentSelect[0]= 511; |
317 | fParentSelect[1]= 521; | |
318 | fParentSelect[2]= 531; | |
319 | fParentSelect[3]= 5122; | |
320 | fParentSelect[4]= 5132; | |
321 | fParentSelect[5]= 5232; | |
322 | fParentSelect[6]= 5332; | |
323 | fFlavorSelect = 5; | |
fe4da5cc | 324 | break; |
f1a48a38 | 325 | case kPyBeautyUnforced: |
fff02fee | 326 | fParentSelect[0] = 511; |
327 | fParentSelect[1] = 521; | |
328 | fParentSelect[2] = 531; | |
329 | fParentSelect[3] = 5122; | |
330 | fParentSelect[4] = 5132; | |
331 | fParentSelect[5] = 5232; | |
332 | fParentSelect[6] = 5332; | |
333 | fFlavorSelect = 5; | |
fe4da5cc | 334 | break; |
f1a48a38 | 335 | case kPyJpsiChi: |
336 | case kPyJpsi: | |
fff02fee | 337 | fParentSelect[0] = 443; |
fe4da5cc | 338 | break; |
f1a48a38 | 339 | case kPyMb: |
5f42cc16 | 340 | case kPyMbNonDiffr: |
f1a48a38 | 341 | case kPyJets: |
342 | case kPyDirectGamma: | |
5be1fe76 | 343 | break; |
fe4da5cc | 344 | } |
8a8f459f | 345 | // |
346 | // This counts the total number of calls to Pyevnt() per run. | |
347 | fTrialsRun = 0; | |
348 | fQ = 0.; | |
349 | fX1 = 0.; | |
350 | fX2 = 0.; | |
438003bb | 351 | fNev = 0 ; |
8a8f459f | 352 | // |
fff02fee | 353 | AliGenMC::Init(); |
fe4da5cc | 354 | } |
355 | ||
356 | void AliGenPythia::Generate() | |
357 | { | |
5ddeb374 | 358 | // Generate one event |
00d6ce7d | 359 | fDecayer->ForceDecay(); |
a0b2b296 | 360 | |
9be6226f | 361 | Float_t polar[3] = {0,0,0}; |
362 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 363 | Float_t p[3]; |
5be1fe76 | 364 | // converts from mm/c to s |
365 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 366 | // |
fe4da5cc | 367 | Int_t nt=0; |
368 | Int_t jev=0; | |
7921755b | 369 | Int_t j, kf; |
fe4da5cc | 370 | fTrials=0; |
fff02fee | 371 | |
fd8fb861 | 372 | // Set collision vertex position |
aee8290b | 373 | if(fVertexSmear==kPerEvent) { |
1512e357 | 374 | fPythia->SetMSTP(151,1); |
fe4da5cc | 375 | for (j=0;j<3;j++) { |
fff02fee | 376 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 377 | } |
aee8290b | 378 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 379 | fPythia->SetMSTP(151,0); |
fe4da5cc | 380 | } |
fff02fee | 381 | // event loop |
fe4da5cc | 382 | while(1) |
383 | { | |
084c1b4a | 384 | fPythia->Pyevnt(); |
11dfaf8d | 385 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
386 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 387 | fTrials++; |
47fc6bd5 | 388 | |
fff02fee | 389 | fPythia->ImportParticles(fParticles,"All"); |
390 | ||
391 | // | |
392 | // | |
393 | // | |
394 | Int_t i; | |
395 | ||
396 | Int_t np = fParticles->GetEntriesFast(); | |
a0b2b296 | 397 | if (np == 0 ) continue; |
398 | // Get event vertex and discard the event if the Z coord. is too big | |
4c07486d | 399 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
400 | Float_t distz = iparticle->Vz()/10.; | |
401 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
a0b2b296 | 402 | // |
4c07486d | 403 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
404 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
405 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
a0b2b296 | 406 | // |
fff02fee | 407 | Int_t* pParent = new Int_t[np]; |
408 | Int_t* pSelected = new Int_t[np]; | |
409 | Int_t* trackIt = new Int_t[np]; | |
b9817493 | 410 | for (i=0; i< np; i++) { |
fff02fee | 411 | pParent[i] = -1; |
412 | pSelected[i] = 0; | |
719b6b8a | 413 | trackIt[i] = 0; |
fff02fee | 414 | } |
8a8f459f | 415 | |
719b6b8a | 416 | Int_t nc = 0; // Total n. of selected particles |
417 | Int_t nParents = 0; // Selected parents | |
418 | Int_t nTkbles = 0; // Trackable particles | |
5f42cc16 | 419 | if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma && |
420 | fProcess != kPyMbNonDiffr) { | |
fd8fb861 | 421 | |
b9817493 | 422 | for (i = 0; i<np; i++) { |
c5d36e84 | 423 | iparticle = (TParticle *) fParticles->At(i); |
23211d3e | 424 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 425 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 426 | // No initial state partons |
2a0e6f5b | 427 | if (ks==21) continue; |
fe4da5cc | 428 | // |
fff02fee | 429 | // Heavy Flavor Selection |
5be1fe76 | 430 | // |
fff02fee | 431 | // quark ? |
432 | kf = TMath::Abs(kf); | |
433 | Int_t kfl = kf; | |
434 | // meson ? | |
435 | if (kfl > 10) kfl/=100; | |
436 | // baryon | |
437 | if (kfl > 10) kfl/=10; | |
438 | if (kfl > 10) kfl/=10; | |
439 | ||
440 | Int_t ipa = iparticle->GetFirstMother()-1; | |
441 | Int_t kfMo = 0; | |
442 | ||
443 | if (ipa > -1) { | |
444 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
445 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
446 | } | |
719b6b8a | 447 | // What to keep in Stack? |
448 | Bool_t flavorOK = kFALSE; | |
449 | Bool_t selectOK = kFALSE; | |
450 | if (fFeedDownOpt) { | |
451 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; | |
452 | } else { | |
453 | if (kfl > fFlavorSelect) { | |
454 | nc = -1; | |
455 | break; | |
456 | } | |
457 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
458 | } | |
459 | switch (fStackFillOpt) { | |
460 | case kFlavorSelection: | |
461 | selectOK = kTRUE; | |
462 | break; | |
463 | case kParentSelection: | |
464 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; | |
465 | break; | |
466 | } | |
467 | if (flavorOK && selectOK) { | |
5be1fe76 | 468 | // |
fff02fee | 469 | // Heavy flavor hadron or quark |
fe4da5cc | 470 | // |
fff02fee | 471 | // Kinematic seletion on final state heavy flavor mesons |
472 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
473 | { | |
719b6b8a | 474 | continue; |
fff02fee | 475 | } |
476 | pSelected[i] = 1; | |
719b6b8a | 477 | if (ParentSelected(kf)) ++nParents; // Update parent count |
fff02fee | 478 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
479 | } else { | |
480 | // Kinematic seletion on decay products | |
481 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
482 | && !KinematicSelection(iparticle, 1)) | |
483 | { | |
719b6b8a | 484 | continue; |
fff02fee | 485 | } |
fe4da5cc | 486 | // |
fff02fee | 487 | // Decay products |
488 | // Select if mother was selected and is not tracked | |
489 | ||
490 | if (pSelected[ipa] && | |
491 | !trackIt[ipa] && // mother will be tracked ? | |
492 | kfMo != 5 && // mother is b-quark, don't store fragments | |
493 | kfMo != 4 && // mother is c-quark, don't store fragments | |
494 | kf != 92) // don't store string | |
495 | { | |
fe4da5cc | 496 | // |
fff02fee | 497 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 498 | // |
5be1fe76 | 499 | // |
47fc6bd5 | 500 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
fff02fee | 501 | { |
502 | Int_t ipF = iparticle->GetFirstDaughter(); | |
503 | Int_t ipL = iparticle->GetLastDaughter(); | |
504 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
505 | } | |
506 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
507 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
508 | } | |
509 | } | |
510 | if (pSelected[i] == -1) pSelected[i] = 0; | |
511 | if (!pSelected[i]) continue; | |
719b6b8a | 512 | // Count quarks only if you did not include fragmentation |
513 | if (fFragmentation && kf <= 10) continue; | |
fff02fee | 514 | nc++; |
515 | // Decision on tracking | |
516 | trackIt[i] = 0; | |
517 | // | |
518 | // Track final state particle | |
519 | if (ks == 1) trackIt[i] = 1; | |
520 | // Track semi-stable particles | |
8cdfd303 | 521 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
fff02fee | 522 | // Track particles selected by process if undecayed. |
523 | if (fForceDecay == kNoDecay) { | |
524 | if (ParentSelected(kf)) trackIt[i] = 1; | |
525 | } else { | |
526 | if (ParentSelected(kf)) trackIt[i] = 0; | |
527 | } | |
719b6b8a | 528 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
fff02fee | 529 | // |
530 | // | |
531 | ||
532 | } // particle selection loop | |
719b6b8a | 533 | if (nc > 0) { |
b9817493 | 534 | for (i = 0; i<np; i++) { |
fff02fee | 535 | if (!pSelected[i]) continue; |
536 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
537 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
5ec84200 | 538 | Int_t ks = iparticle->GetStatusCode(); |
a0b2b296 | 539 | p[0] = iparticle->Px(); |
540 | p[1] = iparticle->Py(); | |
541 | p[2] = iparticle->Pz(); | |
542 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
543 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
544 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
545 | Float_t tof = kconv*iparticle->T(); | |
546 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fff02fee | 547 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a99cf51f | 548 | SetTrack(fTrackIt*trackIt[i] , |
5ec84200 | 549 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
fff02fee | 550 | pParent[i] = nt; |
a99cf51f | 551 | KeepTrack(nt); |
fff02fee | 552 | } // SetTrack loop |
553 | } | |
554 | } else { | |
555 | nc = GenerateMB(); | |
5be1fe76 | 556 | } // mb ? |
fff02fee | 557 | |
b9817493 | 558 | if (pParent) delete[] pParent; |
559 | if (pSelected) delete[] pSelected; | |
560 | if (trackIt) delete[] trackIt; | |
561 | ||
fe4da5cc | 562 | if (nc > 0) { |
719b6b8a | 563 | switch (fCountMode) { |
564 | case kCountAll: | |
565 | // printf(" Count all \n"); | |
566 | jev += nc; | |
567 | break; | |
568 | case kCountParents: | |
569 | // printf(" Count parents \n"); | |
570 | jev += nParents; | |
571 | break; | |
572 | case kCountTrackables: | |
573 | // printf(" Count trackable \n"); | |
574 | jev += nTkbles; | |
575 | break; | |
576 | } | |
5ddeb374 | 577 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 578 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 579 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
8a8f459f | 580 | |
581 | fQ += fPythia->GetVINT(51); | |
582 | fX1 += fPythia->GetVINT(41); | |
583 | fX2 += fPythia->GetVINT(42); | |
584 | fTrialsRun += fTrials; | |
585 | fNev++; | |
fd8fb861 | 586 | MakeHeader(); |
fe4da5cc | 587 | break; |
588 | } | |
589 | } | |
590 | } // event loop | |
a99cf51f | 591 | SetHighWaterMark(nt); |
fe4da5cc | 592 | // adjust weight due to kinematic selection |
593 | AdjustWeights(); | |
594 | // get cross-section | |
595 | fXsection=fPythia->GetPARI(1); | |
596 | } | |
597 | ||
fff02fee | 598 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 599 | { |
5ec84200 | 600 | // |
601 | // Min Bias selection and other global selections | |
602 | // | |
fff02fee | 603 | Int_t i, kf, nt, iparent; |
604 | Int_t nc = 0; | |
605 | Float_t p[3]; | |
606 | Float_t polar[3] = {0,0,0}; | |
607 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 608 | // converts from mm/c to s |
609 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 610 | |
fff02fee | 611 | Int_t np = fParticles->GetEntriesFast(); |
612 | Int_t* pParent = new Int_t[np]; | |
b9817493 | 613 | for (i=0; i< np; i++) pParent[i] = -1; |
b2bb450d | 614 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
988b118b | 615 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
616 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
617 | if (!CheckTrigger(jet1, jet2)) return 0; | |
618 | } | |
619 | ||
b9817493 | 620 | for (i = 0; i<np; i++) { |
fff02fee | 621 | Int_t trackIt = 0; |
622 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
623 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
624 | Int_t ks = iparticle->GetStatusCode(); | |
625 | Int_t km = iparticle->GetFirstMother(); | |
fff02fee | 626 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
627 | (ks != 1) || | |
628 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
629 | nc++; | |
630 | if (ks == 1) trackIt = 1; | |
631 | Int_t ipa = iparticle->GetFirstMother()-1; | |
35967770 | 632 | |
fff02fee | 633 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
35967770 | 634 | |
fe4da5cc | 635 | // |
fff02fee | 636 | // store track information |
a0b2b296 | 637 | p[0] = iparticle->Px(); |
638 | p[1] = iparticle->Py(); | |
639 | p[2] = iparticle->Pz(); | |
640 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
641 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
642 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
fff02fee | 643 | Float_t tof=kconv*iparticle->T(); |
a99cf51f | 644 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
35967770 | 645 | tof, kPPrimary, nt, 1., ks); |
a99cf51f | 646 | KeepTrack(nt); |
fff02fee | 647 | pParent[i] = nt; |
648 | } // select particle | |
649 | } // particle loop | |
650 | ||
651 | if (pParent) delete[] pParent; | |
fe4da5cc | 652 | |
fff02fee | 653 | printf("\n I've put %i particles on the stack \n",nc); |
fff02fee | 654 | return nc; |
655 | } | |
fe4da5cc | 656 | |
fe4da5cc | 657 | |
fff02fee | 658 | void AliGenPythia::FinishRun() |
659 | { | |
660 | // Print x-section summary | |
661 | fPythia->Pystat(1); | |
8a8f459f | 662 | fQ /= fNev; |
663 | fX1 /= fNev; | |
664 | fX2 /= fNev; | |
665 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); | |
666 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); | |
667 | ||
668 | ||
fe4da5cc | 669 | } |
fff02fee | 670 | |
fe4da5cc | 671 | void AliGenPythia::AdjustWeights() |
672 | { | |
5ddeb374 | 673 | // Adjust the weights after generation of all events |
674 | // | |
5ddeb374 | 675 | TParticle *part; |
fe4da5cc | 676 | Int_t ntrack=gAlice->GetNtrack(); |
677 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 678 | part= gAlice->Particle(i); |
5ddeb374 | 679 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 680 | } |
681 | } | |
811826d8 | 682 | |
683 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
684 | { | |
685 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
686 | fNucA1 = a1; | |
687 | fNucA2 = a2; | |
688 | } | |
fff02fee | 689 | |
690 | ||
6d4dd317 | 691 | void AliGenPythia::MakeHeader() const |
fff02fee | 692 | { |
693 | // Builds the event header, to be called after each event | |
694 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
c5d36e84 | 695 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
fd8fb861 | 696 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
c5d36e84 | 697 | header->SetPrimaryVertex(fEventVertex); |
698 | gAlice->SetGenEventHeader(header); | |
fff02fee | 699 | } |
811826d8 | 700 | |
988b118b | 701 | |
5ec84200 | 702 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) const |
988b118b | 703 | { |
704 | // Check the kinematic trigger condition | |
705 | // | |
b2bb450d | 706 | Double_t eta[2]; |
707 | eta[0] = jet1->Eta(); | |
708 | eta[1] = jet2->Eta(); | |
709 | Double_t phi[2]; | |
710 | phi[0] = jet1->Phi(); | |
711 | phi[1] = jet2->Phi(); | |
712 | Int_t pdg[2]; | |
713 | pdg[0] = jet1->GetPdgCode(); | |
714 | pdg[1] = jet2->GetPdgCode(); | |
988b118b | 715 | Bool_t triggered = kFALSE; |
b2bb450d | 716 | |
717 | if (fProcess == kPyJets) { | |
718 | //Check eta range first... | |
719 | if ((eta[0] < fEtaMaxJet && eta[0] > fEtaMinJet) || | |
720 | (eta[1] < fEtaMaxJet && eta[1] > fEtaMinJet)) | |
721 | { | |
722 | //Eta is okay, now check phi range | |
723 | if ((phi[0] < fPhiMaxJet && phi[0] > fPhiMinJet) || | |
724 | (phi[1] < fPhiMaxJet && phi[1] > fPhiMinJet)) | |
725 | { | |
726 | triggered = kTRUE; | |
727 | } | |
728 | } | |
729 | } else { | |
730 | Int_t ij = 0; | |
731 | Int_t ig = 1; | |
732 | if (pdg[0] == kGamma) { | |
733 | ij = 1; | |
734 | ig = 0; | |
735 | } | |
736 | //Check eta range first... | |
737 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
738 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
739 | { | |
740 | //Eta is okay, now check phi range | |
741 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
742 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
743 | { | |
744 | triggered = kTRUE; | |
745 | } | |
746 | } | |
988b118b | 747 | } |
b2bb450d | 748 | |
749 | ||
988b118b | 750 | return triggered; |
751 | } | |
811826d8 | 752 | |
f87cfe57 | 753 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
754 | { | |
755 | // Assignment operator | |
756 | return *this; | |
757 | } | |
fe4da5cc | 758 | |
759 | ||
811826d8 | 760 | |
a8a6107b | 761 | #ifdef never |
18edb254 | 762 | void AliGenPythia::Streamer(TBuffer &R__b) |
763 | { | |
764 | // Stream an object of class AliGenPythia. | |
765 | ||
766 | if (R__b.IsReading()) { | |
767 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
768 | AliGenerator::Streamer(R__b); | |
769 | R__b >> (Int_t&)fProcess; | |
770 | R__b >> (Int_t&)fStrucFunc; | |
771 | R__b >> (Int_t&)fForceDecay; | |
772 | R__b >> fEnergyCMS; | |
773 | R__b >> fKineBias; | |
774 | R__b >> fTrials; | |
775 | fParentSelect.Streamer(R__b); | |
776 | fChildSelect.Streamer(R__b); | |
777 | R__b >> fXsection; | |
778 | // (AliPythia::Instance())->Streamer(R__b); | |
779 | R__b >> fPtHardMin; | |
780 | R__b >> fPtHardMax; | |
781 | // if (fDecayer) fDecayer->Streamer(R__b); | |
782 | } else { | |
783 | R__b.WriteVersion(AliGenPythia::IsA()); | |
784 | AliGenerator::Streamer(R__b); | |
785 | R__b << (Int_t)fProcess; | |
786 | R__b << (Int_t)fStrucFunc; | |
787 | R__b << (Int_t)fForceDecay; | |
788 | R__b << fEnergyCMS; | |
789 | R__b << fKineBias; | |
790 | R__b << fTrials; | |
791 | fParentSelect.Streamer(R__b); | |
792 | fChildSelect.Streamer(R__b); | |
793 | R__b << fXsection; | |
794 | // R__b << fPythia; | |
795 | R__b << fPtHardMin; | |
796 | R__b << fPtHardMax; | |
797 | // fDecayer->Streamer(R__b); | |
798 | } | |
799 | } | |
a8a6107b | 800 | #endif |
18edb254 | 801 |