]>
Commit | Line | Data |
---|---|---|
8d2cd130 | 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 | $Log$ | |
1d568bc2 | 18 | Revision 1.5 2003/04/04 08:12:56 morsch |
19 | Boost for assymmetric systems added. | |
20 | ||
1a626d4e | 21 | Revision 1.4 2003/04/01 20:39:00 morsch |
22 | Pycell configurable. | |
23 | ||
592f8307 | 24 | Revision 1.3 2003/03/31 15:47:16 morsch |
25 | Unhandled cases added. | |
26 | ||
aabc7187 | 27 | Revision 1.2 2003/03/27 09:28:38 morsch |
28 | Charm production process configuration for pPb and pp added | |
29 | (A. Dainese, N. Carrer) | |
30 | ||
adf4d898 | 31 | Revision 1.1 2003/03/15 15:00:48 morsch |
32 | Classed imported from EVGEN. | |
33 | ||
8d2cd130 | 34 | Revision 1.69 2003/01/14 10:50:19 alibrary |
35 | Cleanup of STEER coding conventions | |
36 | ||
37 | Revision 1.68 2002/12/11 09:16:16 morsch | |
38 | Use GetJets to fill header. | |
39 | ||
40 | Revision 1.67 2002/12/09 15:24:09 morsch | |
41 | Same trigger routine can use Pycell or Pyclus. | |
42 | ||
43 | Revision 1.66 2002/12/09 08:22:56 morsch | |
44 | UA1 jet finder (Pycell) for software triggering added. | |
45 | ||
46 | Revision 1.65 2002/11/19 08:57:10 morsch | |
47 | Configuration of pt-kick added. | |
48 | ||
49 | Revision 1.64 2002/11/15 00:43:06 morsch | |
50 | Changes for kPyJets | |
51 | - initial and final state g-radiation + pt-kick default | |
52 | - trigger based on parton clusters (using pyclus) | |
53 | - trigger jets are stored in header. | |
54 | ||
55 | Revision 1.63 2002/10/14 14:55:35 hristov | |
56 | Merging the VirtualMC branch to the main development branch (HEAD) | |
57 | ||
58 | Revision 1.52.4.4 2002/10/10 16:40:08 hristov | |
59 | Updating VirtualMC to v3-09-02 | |
60 | ||
61 | Revision 1.62 2002/09/24 10:00:01 morsch | |
62 | CheckTrigger() corrected. | |
63 | ||
64 | Revision 1.61 2002/07/30 09:52:38 morsch | |
65 | Call SetGammaPhiRange() and SetGammaEtaRange() in the constructor. | |
66 | ||
67 | Revision 1.60 2002/07/19 14:49:03 morsch | |
68 | Typo corrected. | |
69 | ||
70 | Revision 1.59 2002/07/19 14:35:36 morsch | |
71 | Count total number of trials. Print mean Q, x1, x2. | |
72 | ||
73 | Revision 1.58 2002/07/17 10:04:09 morsch | |
74 | SetYHard method added. | |
75 | ||
76 | Revision 1.57 2002/05/22 13:22:53 morsch | |
77 | Process kPyMbNonDiffr added. | |
78 | ||
79 | Revision 1.56 2002/04/26 10:30:01 morsch | |
80 | Option kPyBeautyPbMNR added. (N. Carrer). | |
81 | ||
82 | Revision 1.55 2002/04/17 10:23:56 morsch | |
83 | Coding Rule violations corrected. | |
84 | ||
85 | Revision 1.54 2002/03/28 11:49:10 morsch | |
86 | Pass status code in SetTrack. | |
87 | ||
88 | Revision 1.53 2002/03/25 14:51:13 morsch | |
89 | New stack-fill and count options introduced (N. Carrer). | |
90 | ||
91 | Revision 1.51 2002/03/06 08:46:57 morsch | |
92 | - Loop until np-1 | |
93 | - delete dyn. alloc. arrays (N. Carrer) | |
94 | ||
95 | Revision 1.50 2002/03/03 13:48:50 morsch | |
96 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
97 | NLO calculations (Nicola Carrer). | |
98 | ||
99 | Revision 1.49 2002/02/08 16:50:50 morsch | |
100 | Add name and title in constructor. | |
101 | ||
102 | Revision 1.48 2001/12/20 11:44:28 morsch | |
103 | Add kinematic bias for direct gamma production. | |
104 | ||
105 | Revision 1.47 2001/12/19 14:45:00 morsch | |
106 | Store number of trials in header. | |
107 | ||
108 | Revision 1.46 2001/12/19 10:36:19 morsch | |
109 | Add possibility if jet kinematic biasing. | |
110 | ||
111 | Revision 1.45 2001/11/28 08:06:52 morsch | |
112 | Use fMaxLifeTime parameter. | |
113 | ||
114 | Revision 1.44 2001/11/27 13:13:07 morsch | |
115 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
116 | It can be set via SetMaximumLifetime(..). | |
117 | ||
118 | Revision 1.43 2001/10/21 18:35:56 hristov | |
119 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
120 | ||
121 | Revision 1.42 2001/10/15 08:21:55 morsch | |
122 | Vertex truncation settings moved to AliGenMC. | |
123 | ||
124 | Revision 1.41 2001/10/08 08:45:42 morsch | |
125 | Possibility of vertex cut added. | |
126 | ||
127 | Revision 1.40 2001/09/25 11:30:23 morsch | |
128 | Pass event vertex to header. | |
129 | ||
130 | Revision 1.39 2001/07/27 17:09:36 morsch | |
131 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
132 | to delegate either to local stack or to stack owned by AliRun. | |
133 | (Piotr Skowronski, A.M.) | |
134 | ||
135 | Revision 1.38 2001/07/13 10:58:54 morsch | |
136 | - Some coded moved to AliGenMC | |
137 | - Improved handling of secondary vertices. | |
138 | ||
139 | Revision 1.37 2001/06/28 11:17:28 morsch | |
140 | SetEventListRange setter added. Events in specified range are listed for | |
141 | debugging. (Yuri Kharlov) | |
142 | ||
143 | Revision 1.36 2001/03/30 07:05:49 morsch | |
144 | Final print-out in finish run. | |
145 | Write parton system for jet-production (preliminary solution). | |
146 | ||
147 | Revision 1.35 2001/03/09 13:03:40 morsch | |
148 | Process_t and Struc_Func_t moved to AliPythia.h | |
149 | ||
150 | Revision 1.34 2001/02/14 15:50:40 hristov | |
151 | The last particle in event marked using SetHighWaterMark | |
152 | ||
153 | Revision 1.33 2001/01/30 09:23:12 hristov | |
154 | Streamers removed (R.Brun) | |
155 | ||
156 | Revision 1.32 2001/01/26 19:55:51 hristov | |
157 | Major upgrade of AliRoot code | |
158 | ||
159 | Revision 1.31 2001/01/17 10:54:31 hristov | |
160 | Better protection against FPE | |
161 | ||
162 | Revision 1.30 2000/12/18 08:55:35 morsch | |
163 | Make AliPythia dependent generartors work with new scheme of random number generation | |
164 | ||
165 | Revision 1.29 2000/12/04 11:22:03 morsch | |
166 | Init of sRandom as in 1.15 | |
167 | ||
168 | Revision 1.28 2000/12/02 11:41:39 morsch | |
169 | Use SetRandom() to initialize random number generator in constructor. | |
170 | ||
171 | Revision 1.27 2000/11/30 20:29:02 morsch | |
172 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
173 | ||
174 | Revision 1.26 2000/11/30 07:12:50 alibrary | |
175 | Introducing new Rndm and QA classes | |
176 | ||
177 | Revision 1.25 2000/10/18 19:11:27 hristov | |
178 | Division by zero fixed | |
179 | ||
180 | Revision 1.24 2000/09/18 10:41:35 morsch | |
181 | Add possibility to use nuclear structure functions from PDF library V8. | |
182 | ||
183 | Revision 1.23 2000/09/14 14:05:40 morsch | |
184 | dito | |
185 | ||
186 | Revision 1.22 2000/09/14 14:02:22 morsch | |
187 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
188 | - Correct handling of fForceDecay == all. | |
189 | ||
190 | Revision 1.21 2000/09/12 14:14:55 morsch | |
191 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
192 | ||
193 | Revision 1.20 2000/09/06 14:29:33 morsch | |
194 | Use AliPythia for event generation an AliDecayPythia for decays. | |
195 | Correct handling of "nodecay" option | |
196 | ||
197 | Revision 1.19 2000/07/11 18:24:56 fca | |
198 | Coding convention corrections + few minor bug fixes | |
199 | ||
200 | Revision 1.18 2000/06/30 12:40:34 morsch | |
201 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
202 | Geant units (cm). | |
203 | ||
204 | Revision 1.17 2000/06/09 20:34:07 morsch | |
205 | All coding rule violations except RS3 corrected | |
206 | ||
207 | Revision 1.16 2000/05/15 15:04:20 morsch | |
208 | The full event is written for fNtrack = -1 | |
209 | Coding rule violations corrected. | |
210 | ||
211 | Revision 1.15 2000/04/26 10:14:24 morsch | |
212 | Particles array has one entry more than pythia particle list. Upper bound of | |
213 | particle loop changed to np-1 (R. Guernane, AM) | |
214 | ||
215 | Revision 1.14 2000/04/05 08:36:13 morsch | |
216 | Check status code of particles in Pythia event | |
217 | to avoid double counting as partonic state and final state particle. | |
218 | ||
219 | Revision 1.13 1999/11/09 07:38:48 fca | |
220 | Changes for compatibility with version 2.23 of ROOT | |
221 | ||
222 | Revision 1.12 1999/11/03 17:43:20 fca | |
223 | New version from G.Martinez & A.Morsch | |
224 | ||
225 | Revision 1.11 1999/09/29 09:24:14 fca | |
226 | Introduction of the Copyright and cvs Log | |
227 | */ | |
228 | ||
229 | // | |
230 | // Generator using the TPythia interface (via AliPythia) | |
231 | // to generate pp collisions. | |
232 | // Using SetNuclei() also nuclear modifications to the structure functions | |
233 | // can be taken into account. This makes, of course, only sense for the | |
234 | // generation of the products of hard processes (heavy flavor, jets ...) | |
235 | // | |
236 | // andreas.morsch@cern.ch | |
237 | // | |
238 | ||
239 | #include <TDatabasePDG.h> | |
240 | #include <TParticle.h> | |
241 | #include <TPDGCode.h> | |
242 | #include <TSystem.h> | |
243 | #include <TTree.h> | |
244 | ||
245 | #include "AliConst.h" | |
246 | #include "AliDecayerPythia.h" | |
247 | #include "AliGenPythia.h" | |
248 | #include "AliGenPythiaEventHeader.h" | |
249 | #include "AliPythia.h" | |
250 | #include "AliRun.h" | |
251 | ||
252 | ClassImp(AliGenPythia) | |
253 | ||
254 | AliGenPythia::AliGenPythia() | |
255 | :AliGenMC() | |
256 | { | |
257 | // Default Constructor | |
258 | fParticles = 0; | |
259 | fPythia = 0; | |
260 | fDecayer = new AliDecayerPythia(); | |
261 | SetEventListRange(); | |
262 | SetJetPhiRange(); | |
263 | SetJetEtaRange(); | |
264 | SetJetEtRange(); | |
265 | SetGammaPhiRange(); | |
266 | SetGammaEtaRange(); | |
267 | SetPtKick(); | |
1d568bc2 | 268 | fSetNuclei = kFALSE; |
8d2cd130 | 269 | } |
270 | ||
271 | AliGenPythia::AliGenPythia(Int_t npart) | |
272 | :AliGenMC(npart) | |
273 | { | |
274 | // default charm production at 5. 5 TeV | |
275 | // semimuonic decay | |
276 | // structure function GRVHO | |
277 | // | |
278 | fName = "Pythia"; | |
279 | fTitle= "Particle Generator using PYTHIA"; | |
280 | fXsection = 0.; | |
8d2cd130 | 281 | SetProcess(); |
282 | SetStrucFunc(); | |
283 | SetForceDecay(); | |
284 | SetPtHard(); | |
285 | SetYHard(); | |
286 | SetEnergyCMS(); | |
287 | fDecayer = new AliDecayerPythia(); | |
288 | // Set random number generator | |
289 | sRandom=fRandom; | |
290 | fFlavorSelect = 0; | |
291 | // Produced particles | |
292 | fParticles = new TClonesArray("TParticle",1000); | |
293 | fEventVertex.Set(3); | |
294 | SetEventListRange(); | |
295 | SetJetPhiRange(); | |
296 | SetJetEtaRange(); | |
297 | SetJetEtRange(); | |
298 | SetGammaPhiRange(); | |
299 | SetGammaEtaRange(); | |
300 | SetJetReconstructionMode(); | |
301 | SetPtKick(); | |
302 | // Options determining what to keep in the stack (Heavy flavour generation) | |
303 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor | |
304 | fFeedDownOpt = kTRUE; // allow feed down from higher family | |
305 | // Fragmentation on/off | |
306 | fFragmentation = kTRUE; | |
307 | // Default counting mode | |
308 | fCountMode = kCountAll; | |
592f8307 | 309 | // Pycel |
310 | SetPycellParameters(); | |
1d568bc2 | 311 | fSetNuclei = kFALSE; |
8d2cd130 | 312 | } |
313 | ||
314 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) | |
315 | { | |
316 | // copy constructor | |
317 | Pythia.Copy(*this); | |
318 | } | |
319 | ||
320 | AliGenPythia::~AliGenPythia() | |
321 | { | |
322 | // Destructor | |
323 | } | |
324 | ||
592f8307 | 325 | void AliGenPythia::SetPycellParameters(Float_t etamax, Int_t neta, Int_t nphi, |
326 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) | |
327 | { | |
328 | // Set pycell parameters | |
329 | fPycellEtaMax = etamax; | |
330 | fPycellNEta = neta; | |
331 | fPycellNPhi = nphi; | |
332 | fPycellThreshold = thresh; | |
333 | fPycellEtSeed = etseed; | |
334 | fPycellMinEtJet = minet; | |
335 | fPycellMaxRadius = r; | |
336 | } | |
337 | ||
338 | ||
339 | ||
8d2cd130 | 340 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
341 | { | |
342 | // Set a range of event numbers, for which a table | |
343 | // of generated particle will be printed | |
344 | fDebugEventFirst = eventFirst; | |
345 | fDebugEventLast = eventLast; | |
346 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
347 | } | |
348 | ||
349 | void AliGenPythia::Init() | |
350 | { | |
351 | // Initialisation | |
352 | ||
353 | SetMC(AliPythia::Instance()); | |
354 | fPythia=(AliPythia*) fgMCEvGen; | |
355 | // | |
356 | fParentWeight=1./Float_t(fNpart); | |
357 | // | |
358 | // Forward Paramters to the AliPythia object | |
359 | fDecayer->SetForceDecay(fForceDecay); | |
360 | fDecayer->Init(); | |
361 | ||
362 | ||
363 | fPythia->SetCKIN(3,fPtHardMin); | |
364 | fPythia->SetCKIN(4,fPtHardMax); | |
365 | fPythia->SetCKIN(7,fYHardMin); | |
366 | fPythia->SetCKIN(8,fYHardMax); | |
367 | ||
1a626d4e | 368 | if (fAProjectile > 0 && fATarget > 0) fPythia->SetNuclei(fAProjectile, fATarget); |
8d2cd130 | 369 | // Fragmentation? |
370 | if (fFragmentation) { | |
371 | fPythia->SetMSTP(111,1); | |
372 | } else { | |
373 | fPythia->SetMSTP(111,0); | |
374 | } | |
375 | ||
376 | ||
377 | // initial state radiation | |
378 | fPythia->SetMSTP(61,fGinit); | |
379 | // final state radiation | |
380 | fPythia->SetMSTP(71,fGfinal); | |
381 | // pt - kick | |
382 | if (fPtKick > 0.) { | |
383 | fPythia->SetMSTP(91,1); | |
384 | fPythia->SetPARP(91,fPtKick); | |
385 | } else { | |
386 | fPythia->SetMSTP(91,0); | |
387 | } | |
388 | ||
389 | // fPythia->SetMSTJ(1,2); | |
390 | // | |
391 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); | |
392 | ||
393 | // Parent and Children Selection | |
394 | switch (fProcess) | |
395 | { | |
396 | case kPyCharm: | |
397 | case kPyCharmUnforced: | |
adf4d898 | 398 | case kPyCharmPbPbMNR: |
aabc7187 | 399 | case kPyCharmppMNR: |
400 | case kPyCharmpPbMNR: | |
8d2cd130 | 401 | fParentSelect[0] = 411; |
402 | fParentSelect[1] = 421; | |
403 | fParentSelect[2] = 431; | |
404 | fParentSelect[3] = 4122; | |
405 | fFlavorSelect = 4; | |
406 | break; | |
adf4d898 | 407 | case kPyD0PbPbMNR: |
408 | case kPyD0pPbMNR: | |
409 | case kPyD0ppMNR: | |
8d2cd130 | 410 | fParentSelect[0] = 421; |
411 | fFlavorSelect = 4; | |
412 | break; | |
413 | case kPyBeauty: | |
adf4d898 | 414 | case kPyBeautyPbPbMNR: |
415 | case kPyBeautypPbMNR: | |
416 | case kPyBeautyppMNR: | |
8d2cd130 | 417 | fParentSelect[0]= 511; |
418 | fParentSelect[1]= 521; | |
419 | fParentSelect[2]= 531; | |
420 | fParentSelect[3]= 5122; | |
421 | fParentSelect[4]= 5132; | |
422 | fParentSelect[5]= 5232; | |
423 | fParentSelect[6]= 5332; | |
424 | fFlavorSelect = 5; | |
425 | break; | |
426 | case kPyBeautyUnforced: | |
427 | fParentSelect[0] = 511; | |
428 | fParentSelect[1] = 521; | |
429 | fParentSelect[2] = 531; | |
430 | fParentSelect[3] = 5122; | |
431 | fParentSelect[4] = 5132; | |
432 | fParentSelect[5] = 5232; | |
433 | fParentSelect[6] = 5332; | |
434 | fFlavorSelect = 5; | |
435 | break; | |
436 | case kPyJpsiChi: | |
437 | case kPyJpsi: | |
438 | fParentSelect[0] = 443; | |
439 | break; | |
440 | case kPyMb: | |
441 | case kPyMbNonDiffr: | |
442 | case kPyJets: | |
443 | case kPyDirectGamma: | |
444 | break; | |
445 | } | |
446 | // | |
592f8307 | 447 | // |
448 | // JetFinder for Trigger | |
449 | // | |
450 | // Configure detector (EMCAL like) | |
451 | // | |
452 | fPythia->SetPARU(51, fPycellEtaMax); | |
453 | fPythia->SetMSTU(51, fPycellNEta); | |
454 | fPythia->SetMSTU(52, fPycellNPhi); | |
455 | // | |
456 | // Configure Jet Finder | |
457 | // | |
458 | fPythia->SetPARU(58, fPycellThreshold); | |
459 | fPythia->SetPARU(52, fPycellEtSeed); | |
460 | fPythia->SetPARU(53, fPycellMinEtJet); | |
461 | fPythia->SetPARU(54, fPycellMaxRadius); | |
462 | fPythia->SetMSTU(54, 2); | |
463 | // | |
8d2cd130 | 464 | // This counts the total number of calls to Pyevnt() per run. |
465 | fTrialsRun = 0; | |
466 | fQ = 0.; | |
467 | fX1 = 0.; | |
468 | fX2 = 0.; | |
469 | fNev = 0 ; | |
470 | // | |
1d568bc2 | 471 | // |
472 | // | |
8d2cd130 | 473 | AliGenMC::Init(); |
1d568bc2 | 474 | // |
475 | // | |
476 | // | |
477 | if (fSetNuclei) { | |
478 | fDyBoost = 0; | |
479 | Warning("Init","SetNuclei used. Use SetProjectile + SetTarget instead. fDyBoost has been reset to 0\n"); | |
480 | } | |
8d2cd130 | 481 | } |
482 | ||
483 | void AliGenPythia::Generate() | |
484 | { | |
485 | // Generate one event | |
486 | fDecayer->ForceDecay(); | |
487 | ||
488 | Float_t polar[3] = {0,0,0}; | |
489 | Float_t origin[3] = {0,0,0}; | |
490 | Float_t p[3]; | |
491 | // converts from mm/c to s | |
492 | const Float_t kconv=0.001/2.999792458e8; | |
493 | // | |
494 | Int_t nt=0; | |
495 | Int_t jev=0; | |
496 | Int_t j, kf; | |
497 | fTrials=0; | |
498 | ||
499 | // Set collision vertex position | |
500 | if(fVertexSmear==kPerEvent) { | |
501 | fPythia->SetMSTP(151,1); | |
502 | for (j=0;j<3;j++) { | |
503 | fPythia->SetPARP(151+j, fOsigma[j]*10.); | |
504 | } | |
505 | } else if (fVertexSmear==kPerTrack) { | |
506 | fPythia->SetMSTP(151,0); | |
507 | } | |
508 | // event loop | |
509 | while(1) | |
510 | { | |
511 | fPythia->Pyevnt(); | |
512 | if (gAlice->GetEvNumber()>=fDebugEventFirst && | |
513 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
514 | fTrials++; | |
515 | ||
516 | fPythia->ImportParticles(fParticles,"All"); | |
517 | ||
1d568bc2 | 518 | Boost(); |
8d2cd130 | 519 | // |
520 | // | |
521 | // | |
522 | Int_t i; | |
523 | ||
524 | Int_t np = fParticles->GetEntriesFast(); | |
525 | if (np == 0 ) continue; | |
526 | // Get event vertex and discard the event if the Z coord. is too big | |
527 | TParticle *iparticle = (TParticle *) fParticles->At(0); | |
528 | Float_t distz = iparticle->Vz()/10.; | |
529 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
530 | // | |
531 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); | |
532 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
533 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
534 | // | |
535 | Int_t* pParent = new Int_t[np]; | |
536 | Int_t* pSelected = new Int_t[np]; | |
537 | Int_t* trackIt = new Int_t[np]; | |
538 | for (i=0; i< np; i++) { | |
539 | pParent[i] = -1; | |
540 | pSelected[i] = 0; | |
541 | trackIt[i] = 0; | |
542 | } | |
543 | ||
544 | Int_t nc = 0; // Total n. of selected particles | |
545 | Int_t nParents = 0; // Selected parents | |
546 | Int_t nTkbles = 0; // Trackable particles | |
547 | if (fProcess != kPyMb && fProcess != kPyJets && | |
548 | fProcess != kPyDirectGamma && | |
549 | fProcess != kPyMbNonDiffr) { | |
550 | ||
551 | for (i = 0; i<np; i++) { | |
552 | iparticle = (TParticle *) fParticles->At(i); | |
553 | Int_t ks = iparticle->GetStatusCode(); | |
554 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
555 | // No initial state partons | |
556 | if (ks==21) continue; | |
557 | // | |
558 | // Heavy Flavor Selection | |
559 | // | |
560 | // quark ? | |
561 | kf = TMath::Abs(kf); | |
562 | Int_t kfl = kf; | |
563 | // meson ? | |
564 | if (kfl > 10) kfl/=100; | |
565 | // baryon | |
566 | if (kfl > 10) kfl/=10; | |
567 | if (kfl > 10) kfl/=10; | |
568 | ||
569 | Int_t ipa = iparticle->GetFirstMother()-1; | |
570 | Int_t kfMo = 0; | |
571 | ||
572 | if (ipa > -1) { | |
573 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
574 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
575 | } | |
576 | // What to keep in Stack? | |
577 | Bool_t flavorOK = kFALSE; | |
578 | Bool_t selectOK = kFALSE; | |
579 | if (fFeedDownOpt) { | |
580 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; | |
581 | } else { | |
582 | if (kfl > fFlavorSelect) { | |
583 | nc = -1; | |
584 | break; | |
585 | } | |
586 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
587 | } | |
588 | switch (fStackFillOpt) { | |
589 | case kFlavorSelection: | |
590 | selectOK = kTRUE; | |
591 | break; | |
592 | case kParentSelection: | |
593 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; | |
594 | break; | |
595 | } | |
596 | if (flavorOK && selectOK) { | |
597 | // | |
598 | // Heavy flavor hadron or quark | |
599 | // | |
600 | // Kinematic seletion on final state heavy flavor mesons | |
601 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
602 | { | |
603 | continue; | |
604 | } | |
605 | pSelected[i] = 1; | |
606 | if (ParentSelected(kf)) ++nParents; // Update parent count | |
607 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); | |
608 | } else { | |
609 | // Kinematic seletion on decay products | |
610 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
611 | && !KinematicSelection(iparticle, 1)) | |
612 | { | |
613 | continue; | |
614 | } | |
615 | // | |
616 | // Decay products | |
617 | // Select if mother was selected and is not tracked | |
618 | ||
619 | if (pSelected[ipa] && | |
620 | !trackIt[ipa] && // mother will be tracked ? | |
621 | kfMo != 5 && // mother is b-quark, don't store fragments | |
622 | kfMo != 4 && // mother is c-quark, don't store fragments | |
623 | kf != 92) // don't store string | |
624 | { | |
625 | // | |
626 | // Semi-stable or de-selected: diselect decay products: | |
627 | // | |
628 | // | |
629 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) | |
630 | { | |
631 | Int_t ipF = iparticle->GetFirstDaughter(); | |
632 | Int_t ipL = iparticle->GetLastDaughter(); | |
633 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
634 | } | |
635 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
636 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
637 | } | |
638 | } | |
639 | if (pSelected[i] == -1) pSelected[i] = 0; | |
640 | if (!pSelected[i]) continue; | |
641 | // Count quarks only if you did not include fragmentation | |
642 | if (fFragmentation && kf <= 10) continue; | |
643 | nc++; | |
644 | // Decision on tracking | |
645 | trackIt[i] = 0; | |
646 | // | |
647 | // Track final state particle | |
648 | if (ks == 1) trackIt[i] = 1; | |
649 | // Track semi-stable particles | |
650 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; | |
651 | // Track particles selected by process if undecayed. | |
652 | if (fForceDecay == kNoDecay) { | |
653 | if (ParentSelected(kf)) trackIt[i] = 1; | |
654 | } else { | |
655 | if (ParentSelected(kf)) trackIt[i] = 0; | |
656 | } | |
657 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter | |
658 | // | |
659 | // | |
660 | ||
661 | } // particle selection loop | |
662 | if (nc > 0) { | |
663 | for (i = 0; i<np; i++) { | |
664 | if (!pSelected[i]) continue; | |
665 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
666 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
667 | Int_t ks = iparticle->GetStatusCode(); | |
668 | p[0] = iparticle->Px(); | |
669 | p[1] = iparticle->Py(); | |
670 | p[2] = iparticle->Pz(); | |
671 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
672 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
673 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
674 | Float_t tof = kconv*iparticle->T(); | |
675 | Int_t ipa = iparticle->GetFirstMother()-1; | |
676 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; | |
677 | SetTrack(fTrackIt*trackIt[i] , | |
678 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); | |
679 | pParent[i] = nt; | |
680 | KeepTrack(nt); | |
681 | } // SetTrack loop | |
682 | } | |
683 | } else { | |
684 | nc = GenerateMB(); | |
685 | } // mb ? | |
686 | ||
687 | if (pParent) delete[] pParent; | |
688 | if (pSelected) delete[] pSelected; | |
689 | if (trackIt) delete[] trackIt; | |
690 | ||
691 | if (nc > 0) { | |
692 | switch (fCountMode) { | |
693 | case kCountAll: | |
694 | // printf(" Count all \n"); | |
695 | jev += nc; | |
696 | break; | |
697 | case kCountParents: | |
698 | // printf(" Count parents \n"); | |
699 | jev += nParents; | |
700 | break; | |
701 | case kCountTrackables: | |
702 | // printf(" Count trackable \n"); | |
703 | jev += nTkbles; | |
704 | break; | |
705 | } | |
706 | if (jev >= fNpart || fNpart == -1) { | |
707 | fKineBias=Float_t(fNpart)/Float_t(fTrials); | |
708 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); | |
709 | ||
710 | fQ += fPythia->GetVINT(51); | |
711 | fX1 += fPythia->GetVINT(41); | |
712 | fX2 += fPythia->GetVINT(42); | |
713 | fTrialsRun += fTrials; | |
714 | fNev++; | |
715 | MakeHeader(); | |
716 | break; | |
717 | } | |
718 | } | |
719 | } // event loop | |
720 | SetHighWaterMark(nt); | |
721 | // adjust weight due to kinematic selection | |
722 | AdjustWeights(); | |
723 | // get cross-section | |
724 | fXsection=fPythia->GetPARI(1); | |
725 | } | |
726 | ||
727 | Int_t AliGenPythia::GenerateMB() | |
728 | { | |
729 | // | |
730 | // Min Bias selection and other global selections | |
731 | // | |
732 | Int_t i, kf, nt, iparent; | |
733 | Int_t nc = 0; | |
734 | Float_t p[3]; | |
735 | Float_t polar[3] = {0,0,0}; | |
736 | Float_t origin[3] = {0,0,0}; | |
737 | // converts from mm/c to s | |
738 | const Float_t kconv=0.001/2.999792458e8; | |
739 | ||
740 | Int_t np = fParticles->GetEntriesFast(); | |
741 | Int_t* pParent = new Int_t[np]; | |
742 | for (i=0; i< np; i++) pParent[i] = -1; | |
743 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { | |
744 | TParticle* jet1 = (TParticle *) fParticles->At(6); | |
745 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
746 | if (!CheckTrigger(jet1, jet2)) return 0; | |
747 | } | |
748 | ||
749 | for (i = 0; i<np; i++) { | |
750 | Int_t trackIt = 0; | |
751 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
752 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
753 | Int_t ks = iparticle->GetStatusCode(); | |
754 | Int_t km = iparticle->GetFirstMother(); | |
755 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || | |
756 | (ks != 1) || | |
757 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
758 | nc++; | |
759 | if (ks == 1) trackIt = 1; | |
760 | Int_t ipa = iparticle->GetFirstMother()-1; | |
761 | ||
762 | iparent = (ipa > -1) ? pParent[ipa] : -1; | |
763 | ||
764 | // | |
765 | // store track information | |
766 | p[0] = iparticle->Px(); | |
767 | p[1] = iparticle->Py(); | |
768 | p[2] = iparticle->Pz(); | |
769 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
770 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
771 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
772 | Float_t tof=kconv*iparticle->T(); | |
773 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, | |
774 | tof, kPPrimary, nt, 1., ks); | |
775 | KeepTrack(nt); | |
776 | pParent[i] = nt; | |
777 | } // select particle | |
778 | } // particle loop | |
779 | ||
780 | if (pParent) delete[] pParent; | |
781 | ||
782 | printf("\n I've put %i particles on the stack \n",nc); | |
783 | return nc; | |
784 | } | |
785 | ||
786 | ||
787 | void AliGenPythia::FinishRun() | |
788 | { | |
789 | // Print x-section summary | |
790 | fPythia->Pystat(1); | |
791 | fQ /= fNev; | |
792 | fX1 /= fNev; | |
793 | fX2 /= fNev; | |
794 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); | |
795 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); | |
796 | ||
797 | ||
798 | } | |
799 | ||
800 | void AliGenPythia::AdjustWeights() | |
801 | { | |
802 | // Adjust the weights after generation of all events | |
803 | // | |
804 | TParticle *part; | |
805 | Int_t ntrack=gAlice->GetNtrack(); | |
806 | for (Int_t i=0; i<ntrack; i++) { | |
807 | part= gAlice->Particle(i); | |
808 | part->SetWeight(part->GetWeight()*fKineBias); | |
809 | } | |
810 | } | |
811 | ||
812 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
813 | { | |
814 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
1d568bc2 | 815 | |
1a626d4e | 816 | fAProjectile = a1; |
817 | fATarget = a2; | |
1d568bc2 | 818 | fSetNuclei = kTRUE; |
8d2cd130 | 819 | } |
820 | ||
821 | ||
822 | void AliGenPythia::MakeHeader() | |
823 | { | |
824 | // Builds the event header, to be called after each event | |
825 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
826 | // | |
827 | // Event type | |
828 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); | |
829 | // | |
830 | // Number of trials | |
831 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); | |
832 | // | |
833 | // Event Vertex | |
834 | header->SetPrimaryVertex(fEventVertex); | |
835 | // | |
836 | // Jets that have triggered | |
837 | if (fProcess == kPyJets) | |
838 | { | |
839 | Int_t ntrig, njet; | |
840 | Float_t jets[4][10]; | |
841 | GetJets(njet, ntrig, jets); | |
842 | ||
843 | for (Int_t i = 0; i < ntrig; i++) { | |
844 | ((AliGenPythiaEventHeader*) header)->AddJet(jets[0][i], jets[1][i], jets[2][i], | |
845 | jets[3][i]); | |
846 | } | |
847 | } | |
848 | gAlice->SetGenEventHeader(header); | |
849 | } | |
850 | ||
851 | ||
852 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) | |
853 | { | |
854 | // Check the kinematic trigger condition | |
855 | // | |
856 | Double_t eta[2]; | |
857 | eta[0] = jet1->Eta(); | |
858 | eta[1] = jet2->Eta(); | |
859 | Double_t phi[2]; | |
860 | phi[0] = jet1->Phi(); | |
861 | phi[1] = jet2->Phi(); | |
862 | Int_t pdg[2]; | |
863 | pdg[0] = jet1->GetPdgCode(); | |
864 | pdg[1] = jet2->GetPdgCode(); | |
865 | Bool_t triggered = kFALSE; | |
866 | ||
867 | if (fProcess == kPyJets) { | |
868 | Int_t njets = 0; | |
869 | Int_t ntrig = 0; | |
870 | Float_t jets[4][10]; | |
871 | // | |
872 | // Use Pythia clustering on parton level to determine jet axis | |
873 | // | |
874 | GetJets(njets, ntrig, jets); | |
875 | ||
876 | if (ntrig) triggered = kTRUE; | |
877 | // | |
878 | } else { | |
879 | Int_t ij = 0; | |
880 | Int_t ig = 1; | |
881 | if (pdg[0] == kGamma) { | |
882 | ij = 1; | |
883 | ig = 0; | |
884 | } | |
885 | //Check eta range first... | |
886 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
887 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
888 | { | |
889 | //Eta is okay, now check phi range | |
890 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
891 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
892 | { | |
893 | triggered = kTRUE; | |
894 | } | |
895 | } | |
896 | } | |
897 | return triggered; | |
898 | } | |
899 | ||
900 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) | |
901 | { | |
902 | // Assignment operator | |
903 | return *this; | |
904 | } | |
905 | ||
906 | void AliGenPythia::LoadEvent() | |
907 | { | |
908 | // | |
909 | // Load event into Pythia Common Block | |
910 | // | |
911 | ||
912 | ||
913 | Int_t npart = (Int_t) (gAlice->TreeK())->GetEntries(); | |
914 | (fPythia->GetPyjets())->N = npart; | |
915 | ||
916 | for (Int_t part = 0; part < npart; part++) { | |
917 | TParticle *MPart = gAlice->Particle(part); | |
918 | Int_t kf = MPart->GetPdgCode(); | |
919 | Int_t ks = MPart->GetStatusCode(); | |
920 | Float_t px = MPart->Px(); | |
921 | Float_t py = MPart->Py(); | |
922 | Float_t pz = MPart->Pz(); | |
923 | Float_t e = MPart->Energy(); | |
924 | Float_t p = TMath::Sqrt(px * px + py * py + pz * pz); | |
925 | Float_t m = TMath::Sqrt(e * e - p * p); | |
926 | ||
927 | ||
928 | (fPythia->GetPyjets())->P[0][part] = px; | |
929 | (fPythia->GetPyjets())->P[1][part] = py; | |
930 | (fPythia->GetPyjets())->P[2][part] = pz; | |
931 | (fPythia->GetPyjets())->P[3][part] = e; | |
932 | (fPythia->GetPyjets())->P[4][part] = m; | |
933 | ||
934 | (fPythia->GetPyjets())->K[1][part] = kf; | |
935 | (fPythia->GetPyjets())->K[0][part] = ks; | |
936 | } | |
937 | } | |
938 | ||
939 | void AliGenPythia::RecJetsUA1(Float_t eCellMin, Float_t eCellSeed, Float_t eMin, Float_t rMax, | |
940 | Int_t& njets, Float_t jets [4][50]) | |
941 | { | |
942 | // | |
943 | // Calls the Pythia jet finding algorithm to find jets in the current event | |
944 | // | |
945 | // | |
8d2cd130 | 946 | // |
947 | // Save jets | |
948 | Int_t n = fPythia->GetN(); | |
949 | ||
950 | // | |
951 | // Run Jet Finder | |
952 | fPythia->Pycell(njets); | |
953 | Int_t i; | |
954 | for (i = 0; i < njets; i++) { | |
955 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; | |
956 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; | |
957 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; | |
958 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; | |
959 | ||
960 | jets[0][i] = px; | |
961 | jets[1][i] = py; | |
962 | jets[2][i] = pz; | |
963 | jets[3][i] = e; | |
964 | } | |
965 | } | |
966 | ||
967 | ||
968 | ||
969 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) | |
970 | { | |
971 | // | |
972 | // Calls the Pythia clustering algorithm to find jets in the current event | |
973 | // | |
974 | Int_t n = fPythia->GetN(); | |
975 | nJets = 0; | |
976 | nJetsTrig = 0; | |
977 | if (fJetReconstruction == kCluster) { | |
978 | // | |
979 | // Configure cluster algorithm | |
980 | // | |
981 | fPythia->SetPARU(43, 2.); | |
982 | fPythia->SetMSTU(41, 1); | |
983 | // | |
984 | // Call cluster algorithm | |
985 | // | |
986 | fPythia->Pyclus(nJets); | |
987 | // | |
988 | // Loading jets from common block | |
989 | // | |
990 | } else { | |
592f8307 | 991 | |
8d2cd130 | 992 | // |
993 | // Run Jet Finder | |
994 | fPythia->Pycell(nJets); | |
995 | } | |
996 | ||
997 | Int_t i; | |
998 | for (i = 0; i < nJets; i++) { | |
999 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; | |
1000 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; | |
1001 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; | |
1002 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; | |
1003 | Float_t pt = TMath::Sqrt(px * px + py * py); | |
1004 | Float_t phi = TMath::ATan2(py,px); | |
1005 | Float_t theta = TMath::ATan2(pt,pz); | |
1006 | Float_t et = e * TMath::Sin(theta); | |
1007 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); | |
1008 | ||
1009 | if ( | |
1010 | eta > fEtaMinJet && eta < fEtaMaxJet && | |
1011 | phi > fPhiMinJet && eta < fPhiMaxJet && | |
1012 | et > fEtMinJet && et < fEtMaxJet | |
1013 | ) | |
1014 | { | |
1015 | jets[0][nJetsTrig] = px; | |
1016 | jets[1][nJetsTrig] = py; | |
1017 | jets[2][nJetsTrig] = pz; | |
1018 | jets[3][nJetsTrig] = e; | |
1019 | nJetsTrig++; | |
1020 | ||
1021 | } else { | |
1022 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | ||
1028 | #ifdef never | |
1029 | void AliGenPythia::Streamer(TBuffer &R__b) | |
1030 | { | |
1031 | // Stream an object of class AliGenPythia. | |
1032 | ||
1033 | if (R__b.IsReading()) { | |
1034 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
1035 | AliGenerator::Streamer(R__b); | |
1036 | R__b >> (Int_t&)fProcess; | |
1037 | R__b >> (Int_t&)fStrucFunc; | |
1038 | R__b >> (Int_t&)fForceDecay; | |
1039 | R__b >> fEnergyCMS; | |
1040 | R__b >> fKineBias; | |
1041 | R__b >> fTrials; | |
1042 | fParentSelect.Streamer(R__b); | |
1043 | fChildSelect.Streamer(R__b); | |
1044 | R__b >> fXsection; | |
1045 | // (AliPythia::Instance())->Streamer(R__b); | |
1046 | R__b >> fPtHardMin; | |
1047 | R__b >> fPtHardMax; | |
1048 | // if (fDecayer) fDecayer->Streamer(R__b); | |
1049 | } else { | |
1050 | R__b.WriteVersion(AliGenPythia::IsA()); | |
1051 | AliGenerator::Streamer(R__b); | |
1052 | R__b << (Int_t)fProcess; | |
1053 | R__b << (Int_t)fStrucFunc; | |
1054 | R__b << (Int_t)fForceDecay; | |
1055 | R__b << fEnergyCMS; | |
1056 | R__b << fKineBias; | |
1057 | R__b << fTrials; | |
1058 | fParentSelect.Streamer(R__b); | |
1059 | fChildSelect.Streamer(R__b); | |
1060 | R__b << fXsection; | |
1061 | // R__b << fPythia; | |
1062 | R__b << fPtHardMin; | |
1063 | R__b << fPtHardMax; | |
1064 | // fDecayer->Streamer(R__b); | |
1065 | } | |
1066 | } | |
1067 | #endif | |
1068 |