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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 | $Log$ | |
b9d0a01d | 18 | Revision 1.52.4.4 2002/10/10 16:40:08 hristov |
19 | Updating VirtualMC to v3-09-02 | |
20 | ||
21 | Revision 1.62 2002/09/24 10:00:01 morsch | |
22 | CheckTrigger() corrected. | |
23 | ||
6ae1960b | 24 | Revision 1.61 2002/07/30 09:52:38 morsch |
25 | Call SetGammaPhiRange() and SetGammaEtaRange() in the constructor. | |
26 | ||
a7f29b20 | 27 | Revision 1.60 2002/07/19 14:49:03 morsch |
28 | Typo corrected. | |
29 | ||
438003bb | 30 | Revision 1.59 2002/07/19 14:35:36 morsch |
31 | Count total number of trials. Print mean Q, x1, x2. | |
32 | ||
8a8f459f | 33 | Revision 1.58 2002/07/17 10:04:09 morsch |
34 | SetYHard method added. | |
35 | ||
35967770 | 36 | Revision 1.57 2002/05/22 13:22:53 morsch |
37 | Process kPyMbNonDiffr added. | |
38 | ||
5f42cc16 | 39 | Revision 1.56 2002/04/26 10:30:01 morsch |
40 | Option kPyBeautyPbMNR added. (N. Carrer). | |
41 | ||
c0acde67 | 42 | Revision 1.55 2002/04/17 10:23:56 morsch |
43 | Coding Rule violations corrected. | |
44 | ||
6d4dd317 | 45 | Revision 1.54 2002/03/28 11:49:10 morsch |
46 | Pass status code in SetTrack. | |
47 | ||
5ec84200 | 48 | Revision 1.53 2002/03/25 14:51:13 morsch |
49 | New stack-fill and count options introduced (N. Carrer). | |
50 | ||
0d7c70a0 | 51 | Revision 1.51 2002/03/06 08:46:57 morsch |
52 | - Loop until np-1 | |
53 | - delete dyn. alloc. arrays (N. Carrer) | |
54 | ||
b9817493 | 55 | Revision 1.50 2002/03/03 13:48:50 morsch |
56 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
57 | NLO calculations (Nicola Carrer). | |
58 | ||
fbd1348b | 59 | Revision 1.49 2002/02/08 16:50:50 morsch |
60 | Add name and title in constructor. | |
61 | ||
8b31bfac | 62 | Revision 1.48 2001/12/20 11:44:28 morsch |
63 | Add kinematic bias for direct gamma production. | |
64 | ||
b2bb450d | 65 | Revision 1.47 2001/12/19 14:45:00 morsch |
66 | Store number of trials in header. | |
67 | ||
fd8fb861 | 68 | Revision 1.46 2001/12/19 10:36:19 morsch |
69 | Add possibility if jet kinematic biasing. | |
70 | ||
988b118b | 71 | Revision 1.45 2001/11/28 08:06:52 morsch |
72 | Use fMaxLifeTime parameter. | |
73 | ||
8cdfd303 | 74 | Revision 1.44 2001/11/27 13:13:07 morsch |
75 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
76 | It can be set via SetMaximumLifetime(..). | |
77 | ||
47fc6bd5 | 78 | Revision 1.43 2001/10/21 18:35:56 hristov |
79 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
80 | ||
2685bf00 | 81 | Revision 1.42 2001/10/15 08:21:55 morsch |
82 | Vertex truncation settings moved to AliGenMC. | |
83 | ||
4c07486d | 84 | Revision 1.41 2001/10/08 08:45:42 morsch |
85 | Possibility of vertex cut added. | |
86 | ||
a0b2b296 | 87 | Revision 1.40 2001/09/25 11:30:23 morsch |
88 | Pass event vertex to header. | |
89 | ||
c5d36e84 | 90 | Revision 1.39 2001/07/27 17:09:36 morsch |
91 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
92 | to delegate either to local stack or to stack owned by AliRun. | |
93 | (Piotr Skowronski, A.M.) | |
94 | ||
a99cf51f | 95 | Revision 1.38 2001/07/13 10:58:54 morsch |
96 | - Some coded moved to AliGenMC | |
97 | - Improved handling of secondary vertices. | |
98 | ||
fff02fee | 99 | Revision 1.37 2001/06/28 11:17:28 morsch |
100 | SetEventListRange setter added. Events in specified range are listed for | |
101 | debugging. (Yuri Kharlov) | |
102 | ||
11dfaf8d | 103 | Revision 1.36 2001/03/30 07:05:49 morsch |
104 | Final print-out in finish run. | |
105 | Write parton system for jet-production (preliminary solution). | |
106 | ||
9be6226f | 107 | Revision 1.35 2001/03/09 13:03:40 morsch |
108 | Process_t and Struc_Func_t moved to AliPythia.h | |
109 | ||
f1a48a38 | 110 | Revision 1.34 2001/02/14 15:50:40 hristov |
111 | The last particle in event marked using SetHighWaterMark | |
112 | ||
28adac24 | 113 | Revision 1.33 2001/01/30 09:23:12 hristov |
114 | Streamers removed (R.Brun) | |
115 | ||
a8a6107b | 116 | Revision 1.32 2001/01/26 19:55:51 hristov |
117 | Major upgrade of AliRoot code | |
118 | ||
2ab0c725 | 119 | Revision 1.31 2001/01/17 10:54:31 hristov |
120 | Better protection against FPE | |
121 | ||
0f9e52a3 | 122 | Revision 1.30 2000/12/18 08:55:35 morsch |
123 | Make AliPythia dependent generartors work with new scheme of random number generation | |
124 | ||
3356c022 | 125 | Revision 1.29 2000/12/04 11:22:03 morsch |
126 | Init of sRandom as in 1.15 | |
127 | ||
097ec7c1 | 128 | Revision 1.28 2000/12/02 11:41:39 morsch |
129 | Use SetRandom() to initialize random number generator in constructor. | |
130 | ||
1ed25e11 | 131 | Revision 1.27 2000/11/30 20:29:02 morsch |
132 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
133 | ||
ad1df918 | 134 | Revision 1.26 2000/11/30 07:12:50 alibrary |
135 | Introducing new Rndm and QA classes | |
136 | ||
65fb704d | 137 | Revision 1.25 2000/10/18 19:11:27 hristov |
138 | Division by zero fixed | |
139 | ||
919c2096 | 140 | Revision 1.24 2000/09/18 10:41:35 morsch |
141 | Add possibility to use nuclear structure functions from PDF library V8. | |
142 | ||
811826d8 | 143 | Revision 1.23 2000/09/14 14:05:40 morsch |
144 | dito | |
145 | ||
819f84ad | 146 | Revision 1.22 2000/09/14 14:02:22 morsch |
147 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
148 | - Correct handling of fForceDecay == all. | |
149 | ||
4451ef92 | 150 | Revision 1.21 2000/09/12 14:14:55 morsch |
151 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
152 | ||
00d6ce7d | 153 | Revision 1.20 2000/09/06 14:29:33 morsch |
154 | Use AliPythia for event generation an AliDecayPythia for decays. | |
155 | Correct handling of "nodecay" option | |
156 | ||
18edb254 | 157 | Revision 1.19 2000/07/11 18:24:56 fca |
158 | Coding convention corrections + few minor bug fixes | |
159 | ||
aee8290b | 160 | Revision 1.18 2000/06/30 12:40:34 morsch |
161 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
162 | Geant units (cm). | |
163 | ||
1512e357 | 164 | Revision 1.17 2000/06/09 20:34:07 morsch |
165 | All coding rule violations except RS3 corrected | |
166 | ||
f87cfe57 | 167 | Revision 1.16 2000/05/15 15:04:20 morsch |
168 | The full event is written for fNtrack = -1 | |
169 | Coding rule violations corrected. | |
170 | ||
5ddeb374 | 171 | Revision 1.15 2000/04/26 10:14:24 morsch |
172 | Particles array has one entry more than pythia particle list. Upper bound of | |
173 | particle loop changed to np-1 (R. Guernane, AM) | |
174 | ||
2a0e6f5b | 175 | Revision 1.14 2000/04/05 08:36:13 morsch |
176 | Check status code of particles in Pythia event | |
177 | to avoid double counting as partonic state and final state particle. | |
178 | ||
23211d3e | 179 | Revision 1.13 1999/11/09 07:38:48 fca |
180 | Changes for compatibility with version 2.23 of ROOT | |
181 | ||
084c1b4a | 182 | Revision 1.12 1999/11/03 17:43:20 fca |
183 | New version from G.Martinez & A.Morsch | |
184 | ||
886b6f73 | 185 | Revision 1.11 1999/09/29 09:24:14 fca |
186 | Introduction of the Copyright and cvs Log | |
4c039060 | 187 | */ |
188 | ||
6d4dd317 | 189 | // |
190 | // Generator using the TPythia interface (via AliPythia) | |
191 | // to generate pp collisions. | |
192 | // Using SetNuclei() also nuclear modifications to the structure functions | |
193 | // can be taken into account. This makes, of course, only sense for the | |
194 | // generation of the products of hard processes (heavy flavor, jets ...) | |
195 | // | |
196 | // andreas.morsch@cern.ch | |
197 | // | |
198 | ||
199 | ||
fe4da5cc | 200 | #include "AliGenPythia.h" |
fff02fee | 201 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 202 | #include "AliDecayerPythia.h" |
fe4da5cc | 203 | #include "AliRun.h" |
204 | #include "AliPythia.h" | |
18edb254 | 205 | #include "AliPDG.h" |
1578254f | 206 | #include <TParticle.h> |
18edb254 | 207 | #include <TSystem.h> |
f87cfe57 | 208 | |
fe4da5cc | 209 | ClassImp(AliGenPythia) |
210 | ||
211 | AliGenPythia::AliGenPythia() | |
fff02fee | 212 | :AliGenMC() |
fe4da5cc | 213 | { |
18edb254 | 214 | // Default Constructor |
2685bf00 | 215 | fParticles = 0; |
216 | fPythia = 0; | |
988b118b | 217 | fDecayer = new AliDecayerPythia(); |
11dfaf8d | 218 | SetEventListRange(); |
988b118b | 219 | SetJetPhiRange(); |
220 | SetJetEtaRange(); | |
a7f29b20 | 221 | SetGammaPhiRange(); |
222 | SetGammaEtaRange(); | |
fe4da5cc | 223 | } |
224 | ||
225 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 226 | :AliGenMC(npart) |
fe4da5cc | 227 | { |
228 | // default charm production at 5. 5 TeV | |
229 | // semimuonic decay | |
230 | // structure function GRVHO | |
231 | // | |
8b31bfac | 232 | fName = "Pythia"; |
233 | fTitle= "Particle Generator using PYTHIA"; | |
fe4da5cc | 234 | fXsection = 0.; |
811826d8 | 235 | fNucA1=0; |
236 | fNucA2=0; | |
fe4da5cc | 237 | SetProcess(); |
238 | SetStrucFunc(); | |
886b6f73 | 239 | SetForceDecay(); |
fe4da5cc | 240 | SetPtHard(); |
8a8f459f | 241 | SetYHard(); |
fe4da5cc | 242 | SetEnergyCMS(); |
18edb254 | 243 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 244 | // Set random number generator |
097ec7c1 | 245 | sRandom=fRandom; |
fff02fee | 246 | fFlavorSelect = 0; |
247 | // Produced particles | |
248 | fParticles = new TClonesArray("TParticle",1000); | |
c5d36e84 | 249 | fEventVertex.Set(3); |
988b118b | 250 | SetEventListRange(); |
251 | SetJetPhiRange(); | |
252 | SetJetEtaRange(); | |
a7f29b20 | 253 | SetGammaPhiRange(); |
254 | SetGammaEtaRange(); | |
719b6b8a | 255 | // Options determining what to keep in the stack (Heavy flavour generation) |
256 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor | |
257 | fFeedDownOpt = kTRUE; // allow feed down from higher family | |
258 | // Fragmentation on/off | |
259 | fFragmentation = kTRUE; | |
260 | // Default counting mode | |
261 | fCountMode = kCountAll; | |
fe4da5cc | 262 | } |
263 | ||
f87cfe57 | 264 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
265 | { | |
266 | // copy constructor | |
6d4dd317 | 267 | Pythia.Copy(*this); |
f87cfe57 | 268 | } |
269 | ||
fe4da5cc | 270 | AliGenPythia::~AliGenPythia() |
271 | { | |
5ddeb374 | 272 | // Destructor |
fe4da5cc | 273 | } |
274 | ||
11dfaf8d | 275 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
276 | { | |
277 | // Set a range of event numbers, for which a table | |
278 | // of generated particle will be printed | |
279 | fDebugEventFirst = eventFirst; | |
280 | fDebugEventLast = eventLast; | |
281 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
282 | } | |
283 | ||
fe4da5cc | 284 | void AliGenPythia::Init() |
285 | { | |
5ddeb374 | 286 | // Initialisation |
18edb254 | 287 | SetMC(AliPythia::Instance()); |
fe4da5cc | 288 | fPythia=(AliPythia*) fgMCEvGen; |
289 | // | |
290 | fParentWeight=1./Float_t(fNpart); | |
291 | // | |
292 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 293 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 294 | fDecayer->Init(); |
00d6ce7d | 295 | |
18edb254 | 296 | |
fe4da5cc | 297 | fPythia->SetCKIN(3,fPtHardMin); |
35967770 | 298 | fPythia->SetCKIN(4,fPtHardMax); |
299 | fPythia->SetCKIN(7,fYHardMin); | |
300 | fPythia->SetCKIN(8,fYHardMax); | |
301 | ||
811826d8 | 302 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
719b6b8a | 303 | // Fragmentation? |
304 | if (fFragmentation) { | |
305 | fPythia->SetMSTP(111,1); | |
306 | } else { | |
307 | fPythia->SetMSTP(111,0); | |
308 | } | |
309 | ||
fe4da5cc | 310 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 311 | |
312 | // fPythia->Pylist(0); | |
313 | // fPythia->Pystat(2); | |
fe4da5cc | 314 | // Parent and Children Selection |
315 | switch (fProcess) | |
316 | { | |
f1a48a38 | 317 | case kPyCharm: |
f1a48a38 | 318 | case kPyCharmUnforced: |
fbd1348b | 319 | case kPyCharmPbMNR: |
b2bb450d | 320 | fParentSelect[0] = 411; |
321 | fParentSelect[1] = 421; | |
322 | fParentSelect[2] = 431; | |
323 | fParentSelect[3] = 4122; | |
8b31bfac | 324 | fFlavorSelect = 4; |
fe4da5cc | 325 | break; |
719b6b8a | 326 | case kPyD0PbMNR: |
327 | fParentSelect[0] = 421; | |
5f42cc16 | 328 | fFlavorSelect = 4; |
719b6b8a | 329 | break; |
f1a48a38 | 330 | case kPyBeauty: |
c0acde67 | 331 | case kPyBeautyPbMNR: |
fff02fee | 332 | fParentSelect[0]= 511; |
333 | fParentSelect[1]= 521; | |
334 | fParentSelect[2]= 531; | |
335 | fParentSelect[3]= 5122; | |
336 | fParentSelect[4]= 5132; | |
337 | fParentSelect[5]= 5232; | |
338 | fParentSelect[6]= 5332; | |
339 | fFlavorSelect = 5; | |
fe4da5cc | 340 | break; |
f1a48a38 | 341 | case kPyBeautyUnforced: |
fff02fee | 342 | fParentSelect[0] = 511; |
343 | fParentSelect[1] = 521; | |
344 | fParentSelect[2] = 531; | |
345 | fParentSelect[3] = 5122; | |
346 | fParentSelect[4] = 5132; | |
347 | fParentSelect[5] = 5232; | |
348 | fParentSelect[6] = 5332; | |
349 | fFlavorSelect = 5; | |
fe4da5cc | 350 | break; |
f1a48a38 | 351 | case kPyJpsiChi: |
352 | case kPyJpsi: | |
fff02fee | 353 | fParentSelect[0] = 443; |
fe4da5cc | 354 | break; |
f1a48a38 | 355 | case kPyMb: |
5f42cc16 | 356 | case kPyMbNonDiffr: |
f1a48a38 | 357 | case kPyJets: |
358 | case kPyDirectGamma: | |
5be1fe76 | 359 | break; |
fe4da5cc | 360 | } |
8a8f459f | 361 | // |
362 | // This counts the total number of calls to Pyevnt() per run. | |
363 | fTrialsRun = 0; | |
364 | fQ = 0.; | |
365 | fX1 = 0.; | |
366 | fX2 = 0.; | |
438003bb | 367 | fNev = 0 ; |
8a8f459f | 368 | // |
fff02fee | 369 | AliGenMC::Init(); |
fe4da5cc | 370 | } |
371 | ||
372 | void AliGenPythia::Generate() | |
373 | { | |
5ddeb374 | 374 | // Generate one event |
00d6ce7d | 375 | fDecayer->ForceDecay(); |
a0b2b296 | 376 | |
9be6226f | 377 | Float_t polar[3] = {0,0,0}; |
378 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 379 | Float_t p[3]; |
5be1fe76 | 380 | // converts from mm/c to s |
381 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 382 | // |
fe4da5cc | 383 | Int_t nt=0; |
384 | Int_t jev=0; | |
7921755b | 385 | Int_t j, kf; |
fe4da5cc | 386 | fTrials=0; |
fff02fee | 387 | |
fd8fb861 | 388 | // Set collision vertex position |
aee8290b | 389 | if(fVertexSmear==kPerEvent) { |
1512e357 | 390 | fPythia->SetMSTP(151,1); |
fe4da5cc | 391 | for (j=0;j<3;j++) { |
fff02fee | 392 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 393 | } |
aee8290b | 394 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 395 | fPythia->SetMSTP(151,0); |
fe4da5cc | 396 | } |
fff02fee | 397 | // event loop |
fe4da5cc | 398 | while(1) |
399 | { | |
084c1b4a | 400 | fPythia->Pyevnt(); |
11dfaf8d | 401 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
402 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 403 | fTrials++; |
47fc6bd5 | 404 | |
fff02fee | 405 | fPythia->ImportParticles(fParticles,"All"); |
406 | ||
407 | // | |
408 | // | |
409 | // | |
410 | Int_t i; | |
411 | ||
412 | Int_t np = fParticles->GetEntriesFast(); | |
a0b2b296 | 413 | if (np == 0 ) continue; |
414 | // Get event vertex and discard the event if the Z coord. is too big | |
4c07486d | 415 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
416 | Float_t distz = iparticle->Vz()/10.; | |
417 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
a0b2b296 | 418 | // |
4c07486d | 419 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
420 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
421 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
a0b2b296 | 422 | // |
fff02fee | 423 | Int_t* pParent = new Int_t[np]; |
424 | Int_t* pSelected = new Int_t[np]; | |
425 | Int_t* trackIt = new Int_t[np]; | |
b9817493 | 426 | for (i=0; i< np; i++) { |
fff02fee | 427 | pParent[i] = -1; |
428 | pSelected[i] = 0; | |
719b6b8a | 429 | trackIt[i] = 0; |
fff02fee | 430 | } |
8a8f459f | 431 | |
719b6b8a | 432 | Int_t nc = 0; // Total n. of selected particles |
433 | Int_t nParents = 0; // Selected parents | |
434 | Int_t nTkbles = 0; // Trackable particles | |
a7f29b20 | 435 | if (fProcess != kPyMb && fProcess != kPyJets && |
436 | fProcess != kPyDirectGamma && | |
5f42cc16 | 437 | fProcess != kPyMbNonDiffr) { |
fd8fb861 | 438 | |
b9817493 | 439 | for (i = 0; i<np; i++) { |
c5d36e84 | 440 | iparticle = (TParticle *) fParticles->At(i); |
23211d3e | 441 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 442 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 443 | // No initial state partons |
2a0e6f5b | 444 | if (ks==21) continue; |
fe4da5cc | 445 | // |
fff02fee | 446 | // Heavy Flavor Selection |
5be1fe76 | 447 | // |
fff02fee | 448 | // quark ? |
449 | kf = TMath::Abs(kf); | |
450 | Int_t kfl = kf; | |
451 | // meson ? | |
452 | if (kfl > 10) kfl/=100; | |
453 | // baryon | |
454 | if (kfl > 10) kfl/=10; | |
455 | if (kfl > 10) kfl/=10; | |
456 | ||
457 | Int_t ipa = iparticle->GetFirstMother()-1; | |
458 | Int_t kfMo = 0; | |
459 | ||
460 | if (ipa > -1) { | |
461 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
462 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
463 | } | |
719b6b8a | 464 | // What to keep in Stack? |
465 | Bool_t flavorOK = kFALSE; | |
466 | Bool_t selectOK = kFALSE; | |
467 | if (fFeedDownOpt) { | |
468 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; | |
469 | } else { | |
470 | if (kfl > fFlavorSelect) { | |
471 | nc = -1; | |
472 | break; | |
473 | } | |
474 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
475 | } | |
476 | switch (fStackFillOpt) { | |
477 | case kFlavorSelection: | |
478 | selectOK = kTRUE; | |
479 | break; | |
480 | case kParentSelection: | |
481 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; | |
482 | break; | |
483 | } | |
484 | if (flavorOK && selectOK) { | |
5be1fe76 | 485 | // |
fff02fee | 486 | // Heavy flavor hadron or quark |
fe4da5cc | 487 | // |
fff02fee | 488 | // Kinematic seletion on final state heavy flavor mesons |
489 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
490 | { | |
719b6b8a | 491 | continue; |
fff02fee | 492 | } |
493 | pSelected[i] = 1; | |
719b6b8a | 494 | if (ParentSelected(kf)) ++nParents; // Update parent count |
fff02fee | 495 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
496 | } else { | |
497 | // Kinematic seletion on decay products | |
498 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
499 | && !KinematicSelection(iparticle, 1)) | |
500 | { | |
719b6b8a | 501 | continue; |
fff02fee | 502 | } |
fe4da5cc | 503 | // |
fff02fee | 504 | // Decay products |
505 | // Select if mother was selected and is not tracked | |
506 | ||
507 | if (pSelected[ipa] && | |
508 | !trackIt[ipa] && // mother will be tracked ? | |
509 | kfMo != 5 && // mother is b-quark, don't store fragments | |
510 | kfMo != 4 && // mother is c-quark, don't store fragments | |
511 | kf != 92) // don't store string | |
512 | { | |
fe4da5cc | 513 | // |
fff02fee | 514 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 515 | // |
5be1fe76 | 516 | // |
47fc6bd5 | 517 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
fff02fee | 518 | { |
519 | Int_t ipF = iparticle->GetFirstDaughter(); | |
520 | Int_t ipL = iparticle->GetLastDaughter(); | |
521 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
522 | } | |
523 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
524 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
525 | } | |
526 | } | |
527 | if (pSelected[i] == -1) pSelected[i] = 0; | |
528 | if (!pSelected[i]) continue; | |
719b6b8a | 529 | // Count quarks only if you did not include fragmentation |
530 | if (fFragmentation && kf <= 10) continue; | |
fff02fee | 531 | nc++; |
532 | // Decision on tracking | |
533 | trackIt[i] = 0; | |
534 | // | |
535 | // Track final state particle | |
536 | if (ks == 1) trackIt[i] = 1; | |
537 | // Track semi-stable particles | |
8cdfd303 | 538 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
fff02fee | 539 | // Track particles selected by process if undecayed. |
540 | if (fForceDecay == kNoDecay) { | |
541 | if (ParentSelected(kf)) trackIt[i] = 1; | |
542 | } else { | |
543 | if (ParentSelected(kf)) trackIt[i] = 0; | |
544 | } | |
719b6b8a | 545 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
fff02fee | 546 | // |
547 | // | |
548 | ||
549 | } // particle selection loop | |
719b6b8a | 550 | if (nc > 0) { |
b9817493 | 551 | for (i = 0; i<np; i++) { |
fff02fee | 552 | if (!pSelected[i]) continue; |
553 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
554 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
5ec84200 | 555 | Int_t ks = iparticle->GetStatusCode(); |
a0b2b296 | 556 | p[0] = iparticle->Px(); |
557 | p[1] = iparticle->Py(); | |
558 | p[2] = iparticle->Pz(); | |
559 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
560 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
561 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
562 | Float_t tof = kconv*iparticle->T(); | |
563 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fff02fee | 564 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a99cf51f | 565 | SetTrack(fTrackIt*trackIt[i] , |
5ec84200 | 566 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
fff02fee | 567 | pParent[i] = nt; |
a99cf51f | 568 | KeepTrack(nt); |
fff02fee | 569 | } // SetTrack loop |
570 | } | |
571 | } else { | |
572 | nc = GenerateMB(); | |
5be1fe76 | 573 | } // mb ? |
fff02fee | 574 | |
b9817493 | 575 | if (pParent) delete[] pParent; |
576 | if (pSelected) delete[] pSelected; | |
577 | if (trackIt) delete[] trackIt; | |
578 | ||
fe4da5cc | 579 | if (nc > 0) { |
719b6b8a | 580 | switch (fCountMode) { |
581 | case kCountAll: | |
582 | // printf(" Count all \n"); | |
583 | jev += nc; | |
584 | break; | |
585 | case kCountParents: | |
586 | // printf(" Count parents \n"); | |
587 | jev += nParents; | |
588 | break; | |
589 | case kCountTrackables: | |
590 | // printf(" Count trackable \n"); | |
591 | jev += nTkbles; | |
592 | break; | |
593 | } | |
5ddeb374 | 594 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 595 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 596 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
8a8f459f | 597 | |
598 | fQ += fPythia->GetVINT(51); | |
599 | fX1 += fPythia->GetVINT(41); | |
600 | fX2 += fPythia->GetVINT(42); | |
601 | fTrialsRun += fTrials; | |
602 | fNev++; | |
fd8fb861 | 603 | MakeHeader(); |
fe4da5cc | 604 | break; |
605 | } | |
606 | } | |
607 | } // event loop | |
a99cf51f | 608 | SetHighWaterMark(nt); |
fe4da5cc | 609 | // adjust weight due to kinematic selection |
610 | AdjustWeights(); | |
611 | // get cross-section | |
612 | fXsection=fPythia->GetPARI(1); | |
613 | } | |
614 | ||
fff02fee | 615 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 616 | { |
5ec84200 | 617 | // |
618 | // Min Bias selection and other global selections | |
619 | // | |
fff02fee | 620 | Int_t i, kf, nt, iparent; |
621 | Int_t nc = 0; | |
622 | Float_t p[3]; | |
623 | Float_t polar[3] = {0,0,0}; | |
624 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 625 | // converts from mm/c to s |
626 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 627 | |
fff02fee | 628 | Int_t np = fParticles->GetEntriesFast(); |
629 | Int_t* pParent = new Int_t[np]; | |
b9817493 | 630 | for (i=0; i< np; i++) pParent[i] = -1; |
b2bb450d | 631 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
988b118b | 632 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
633 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
634 | if (!CheckTrigger(jet1, jet2)) return 0; | |
635 | } | |
636 | ||
b9817493 | 637 | for (i = 0; i<np; i++) { |
fff02fee | 638 | Int_t trackIt = 0; |
639 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
640 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
641 | Int_t ks = iparticle->GetStatusCode(); | |
642 | Int_t km = iparticle->GetFirstMother(); | |
fff02fee | 643 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
644 | (ks != 1) || | |
645 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
646 | nc++; | |
647 | if (ks == 1) trackIt = 1; | |
648 | Int_t ipa = iparticle->GetFirstMother()-1; | |
35967770 | 649 | |
fff02fee | 650 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
35967770 | 651 | |
fe4da5cc | 652 | // |
fff02fee | 653 | // store track information |
a0b2b296 | 654 | p[0] = iparticle->Px(); |
655 | p[1] = iparticle->Py(); | |
656 | p[2] = iparticle->Pz(); | |
657 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
658 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
659 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
fff02fee | 660 | Float_t tof=kconv*iparticle->T(); |
a99cf51f | 661 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
35967770 | 662 | tof, kPPrimary, nt, 1., ks); |
a99cf51f | 663 | KeepTrack(nt); |
fff02fee | 664 | pParent[i] = nt; |
665 | } // select particle | |
666 | } // particle loop | |
667 | ||
668 | if (pParent) delete[] pParent; | |
fe4da5cc | 669 | |
fff02fee | 670 | printf("\n I've put %i particles on the stack \n",nc); |
fff02fee | 671 | return nc; |
672 | } | |
fe4da5cc | 673 | |
fe4da5cc | 674 | |
fff02fee | 675 | void AliGenPythia::FinishRun() |
676 | { | |
677 | // Print x-section summary | |
678 | fPythia->Pystat(1); | |
8a8f459f | 679 | fQ /= fNev; |
680 | fX1 /= fNev; | |
681 | fX2 /= fNev; | |
682 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); | |
683 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); | |
684 | ||
685 | ||
fe4da5cc | 686 | } |
fff02fee | 687 | |
fe4da5cc | 688 | void AliGenPythia::AdjustWeights() |
689 | { | |
5ddeb374 | 690 | // Adjust the weights after generation of all events |
691 | // | |
5ddeb374 | 692 | TParticle *part; |
fe4da5cc | 693 | Int_t ntrack=gAlice->GetNtrack(); |
694 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 695 | part= gAlice->Particle(i); |
5ddeb374 | 696 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 697 | } |
698 | } | |
811826d8 | 699 | |
700 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
701 | { | |
702 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
703 | fNucA1 = a1; | |
704 | fNucA2 = a2; | |
705 | } | |
fff02fee | 706 | |
707 | ||
6d4dd317 | 708 | void AliGenPythia::MakeHeader() const |
fff02fee | 709 | { |
710 | // Builds the event header, to be called after each event | |
711 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
c5d36e84 | 712 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
fd8fb861 | 713 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
c5d36e84 | 714 | header->SetPrimaryVertex(fEventVertex); |
715 | gAlice->SetGenEventHeader(header); | |
fff02fee | 716 | } |
811826d8 | 717 | |
988b118b | 718 | |
5ec84200 | 719 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) const |
988b118b | 720 | { |
721 | // Check the kinematic trigger condition | |
722 | // | |
b2bb450d | 723 | Double_t eta[2]; |
724 | eta[0] = jet1->Eta(); | |
725 | eta[1] = jet2->Eta(); | |
726 | Double_t phi[2]; | |
727 | phi[0] = jet1->Phi(); | |
728 | phi[1] = jet2->Phi(); | |
729 | Int_t pdg[2]; | |
730 | pdg[0] = jet1->GetPdgCode(); | |
731 | pdg[1] = jet2->GetPdgCode(); | |
988b118b | 732 | Bool_t triggered = kFALSE; |
b2bb450d | 733 | |
734 | if (fProcess == kPyJets) { | |
735 | //Check eta range first... | |
6ae1960b | 736 | if ( |
737 | ((eta[0] < fEtaMaxJet && eta[0] > fEtaMinJet) && | |
738 | (phi[0] < fPhiMaxJet && phi[0] > fPhiMinJet)) | |
739 | ||
740 | || | |
741 | ||
742 | ((eta[1] < fEtaMaxJet && eta[1] > fEtaMinJet) && | |
743 | (phi[1] < fPhiMaxJet && phi[1] > fPhiMinJet)) | |
744 | ) | |
b2bb450d | 745 | { |
6ae1960b | 746 | triggered = kTRUE; |
b2bb450d | 747 | } |
748 | } else { | |
749 | Int_t ij = 0; | |
750 | Int_t ig = 1; | |
751 | if (pdg[0] == kGamma) { | |
752 | ij = 1; | |
753 | ig = 0; | |
754 | } | |
755 | //Check eta range first... | |
756 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
757 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
758 | { | |
759 | //Eta is okay, now check phi range | |
760 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
761 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
762 | { | |
763 | triggered = kTRUE; | |
764 | } | |
765 | } | |
988b118b | 766 | } |
767 | return triggered; | |
768 | } | |
811826d8 | 769 | |
f87cfe57 | 770 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
771 | { | |
772 | // Assignment operator | |
773 | return *this; | |
774 | } | |
fe4da5cc | 775 | |
776 | ||
811826d8 | 777 | |
a8a6107b | 778 | #ifdef never |
18edb254 | 779 | void AliGenPythia::Streamer(TBuffer &R__b) |
780 | { | |
781 | // Stream an object of class AliGenPythia. | |
782 | ||
783 | if (R__b.IsReading()) { | |
784 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
785 | AliGenerator::Streamer(R__b); | |
786 | R__b >> (Int_t&)fProcess; | |
787 | R__b >> (Int_t&)fStrucFunc; | |
788 | R__b >> (Int_t&)fForceDecay; | |
789 | R__b >> fEnergyCMS; | |
790 | R__b >> fKineBias; | |
791 | R__b >> fTrials; | |
792 | fParentSelect.Streamer(R__b); | |
793 | fChildSelect.Streamer(R__b); | |
794 | R__b >> fXsection; | |
795 | // (AliPythia::Instance())->Streamer(R__b); | |
796 | R__b >> fPtHardMin; | |
797 | R__b >> fPtHardMax; | |
798 | // if (fDecayer) fDecayer->Streamer(R__b); | |
799 | } else { | |
800 | R__b.WriteVersion(AliGenPythia::IsA()); | |
801 | AliGenerator::Streamer(R__b); | |
802 | R__b << (Int_t)fProcess; | |
803 | R__b << (Int_t)fStrucFunc; | |
804 | R__b << (Int_t)fForceDecay; | |
805 | R__b << fEnergyCMS; | |
806 | R__b << fKineBias; | |
807 | R__b << fTrials; | |
808 | fParentSelect.Streamer(R__b); | |
809 | fChildSelect.Streamer(R__b); | |
810 | R__b << fXsection; | |
811 | // R__b << fPythia; | |
812 | R__b << fPtHardMin; | |
813 | R__b << fPtHardMax; | |
814 | // fDecayer->Streamer(R__b); | |
815 | } | |
816 | } | |
a8a6107b | 817 | #endif |
18edb254 | 818 |