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 | $Log$ |
aabc7187 |
18 | Revision 1.2 2003/03/27 09:28:38 morsch |
19 | Charm production process configuration for pPb and pp added |
20 | (A. Dainese, N. Carrer) |
21 | |
adf4d898 |
22 | Revision 1.1 2003/03/15 15:00:48 morsch |
23 | Classed imported from EVGEN. |
24 | |
8d2cd130 |
25 | Revision 1.69 2003/01/14 10:50:19 alibrary |
26 | Cleanup of STEER coding conventions |
27 | |
28 | Revision 1.68 2002/12/11 09:16:16 morsch |
29 | Use GetJets to fill header. |
30 | |
31 | Revision 1.67 2002/12/09 15:24:09 morsch |
32 | Same trigger routine can use Pycell or Pyclus. |
33 | |
34 | Revision 1.66 2002/12/09 08:22:56 morsch |
35 | UA1 jet finder (Pycell) for software triggering added. |
36 | |
37 | Revision 1.65 2002/11/19 08:57:10 morsch |
38 | Configuration of pt-kick added. |
39 | |
40 | Revision 1.64 2002/11/15 00:43:06 morsch |
41 | Changes for kPyJets |
42 | - initial and final state g-radiation + pt-kick default |
43 | - trigger based on parton clusters (using pyclus) |
44 | - trigger jets are stored in header. |
45 | |
46 | Revision 1.63 2002/10/14 14:55:35 hristov |
47 | Merging the VirtualMC branch to the main development branch (HEAD) |
48 | |
49 | Revision 1.52.4.4 2002/10/10 16:40:08 hristov |
50 | Updating VirtualMC to v3-09-02 |
51 | |
52 | Revision 1.62 2002/09/24 10:00:01 morsch |
53 | CheckTrigger() corrected. |
54 | |
55 | Revision 1.61 2002/07/30 09:52:38 morsch |
56 | Call SetGammaPhiRange() and SetGammaEtaRange() in the constructor. |
57 | |
58 | Revision 1.60 2002/07/19 14:49:03 morsch |
59 | Typo corrected. |
60 | |
61 | Revision 1.59 2002/07/19 14:35:36 morsch |
62 | Count total number of trials. Print mean Q, x1, x2. |
63 | |
64 | Revision 1.58 2002/07/17 10:04:09 morsch |
65 | SetYHard method added. |
66 | |
67 | Revision 1.57 2002/05/22 13:22:53 morsch |
68 | Process kPyMbNonDiffr added. |
69 | |
70 | Revision 1.56 2002/04/26 10:30:01 morsch |
71 | Option kPyBeautyPbMNR added. (N. Carrer). |
72 | |
73 | Revision 1.55 2002/04/17 10:23:56 morsch |
74 | Coding Rule violations corrected. |
75 | |
76 | Revision 1.54 2002/03/28 11:49:10 morsch |
77 | Pass status code in SetTrack. |
78 | |
79 | Revision 1.53 2002/03/25 14:51:13 morsch |
80 | New stack-fill and count options introduced (N. Carrer). |
81 | |
82 | Revision 1.51 2002/03/06 08:46:57 morsch |
83 | - Loop until np-1 |
84 | - delete dyn. alloc. arrays (N. Carrer) |
85 | |
86 | Revision 1.50 2002/03/03 13:48:50 morsch |
87 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR |
88 | NLO calculations (Nicola Carrer). |
89 | |
90 | Revision 1.49 2002/02/08 16:50:50 morsch |
91 | Add name and title in constructor. |
92 | |
93 | Revision 1.48 2001/12/20 11:44:28 morsch |
94 | Add kinematic bias for direct gamma production. |
95 | |
96 | Revision 1.47 2001/12/19 14:45:00 morsch |
97 | Store number of trials in header. |
98 | |
99 | Revision 1.46 2001/12/19 10:36:19 morsch |
100 | Add possibility if jet kinematic biasing. |
101 | |
102 | Revision 1.45 2001/11/28 08:06:52 morsch |
103 | Use fMaxLifeTime parameter. |
104 | |
105 | Revision 1.44 2001/11/27 13:13:07 morsch |
106 | Maximum lifetime for long-lived particles to be put on the stack is parameter. |
107 | It can be set via SetMaximumLifetime(..). |
108 | |
109 | Revision 1.43 2001/10/21 18:35:56 hristov |
110 | Several pointers were set to zero in the default constructors to avoid memory management problems |
111 | |
112 | Revision 1.42 2001/10/15 08:21:55 morsch |
113 | Vertex truncation settings moved to AliGenMC. |
114 | |
115 | Revision 1.41 2001/10/08 08:45:42 morsch |
116 | Possibility of vertex cut added. |
117 | |
118 | Revision 1.40 2001/09/25 11:30:23 morsch |
119 | Pass event vertex to header. |
120 | |
121 | Revision 1.39 2001/07/27 17:09:36 morsch |
122 | Use local SetTrack, KeepTrack and SetHighWaterMark methods |
123 | to delegate either to local stack or to stack owned by AliRun. |
124 | (Piotr Skowronski, A.M.) |
125 | |
126 | Revision 1.38 2001/07/13 10:58:54 morsch |
127 | - Some coded moved to AliGenMC |
128 | - Improved handling of secondary vertices. |
129 | |
130 | Revision 1.37 2001/06/28 11:17:28 morsch |
131 | SetEventListRange setter added. Events in specified range are listed for |
132 | debugging. (Yuri Kharlov) |
133 | |
134 | Revision 1.36 2001/03/30 07:05:49 morsch |
135 | Final print-out in finish run. |
136 | Write parton system for jet-production (preliminary solution). |
137 | |
138 | Revision 1.35 2001/03/09 13:03:40 morsch |
139 | Process_t and Struc_Func_t moved to AliPythia.h |
140 | |
141 | Revision 1.34 2001/02/14 15:50:40 hristov |
142 | The last particle in event marked using SetHighWaterMark |
143 | |
144 | Revision 1.33 2001/01/30 09:23:12 hristov |
145 | Streamers removed (R.Brun) |
146 | |
147 | Revision 1.32 2001/01/26 19:55:51 hristov |
148 | Major upgrade of AliRoot code |
149 | |
150 | Revision 1.31 2001/01/17 10:54:31 hristov |
151 | Better protection against FPE |
152 | |
153 | Revision 1.30 2000/12/18 08:55:35 morsch |
154 | Make AliPythia dependent generartors work with new scheme of random number generation |
155 | |
156 | Revision 1.29 2000/12/04 11:22:03 morsch |
157 | Init of sRandom as in 1.15 |
158 | |
159 | Revision 1.28 2000/12/02 11:41:39 morsch |
160 | Use SetRandom() to initialize random number generator in constructor. |
161 | |
162 | Revision 1.27 2000/11/30 20:29:02 morsch |
163 | Initialise static variable sRandom in constructor: sRandom = fRandom; |
164 | |
165 | Revision 1.26 2000/11/30 07:12:50 alibrary |
166 | Introducing new Rndm and QA classes |
167 | |
168 | Revision 1.25 2000/10/18 19:11:27 hristov |
169 | Division by zero fixed |
170 | |
171 | Revision 1.24 2000/09/18 10:41:35 morsch |
172 | Add possibility to use nuclear structure functions from PDF library V8. |
173 | |
174 | Revision 1.23 2000/09/14 14:05:40 morsch |
175 | dito |
176 | |
177 | Revision 1.22 2000/09/14 14:02:22 morsch |
178 | - Correct conversion from mm to cm when passing particle vertex to MC. |
179 | - Correct handling of fForceDecay == all. |
180 | |
181 | Revision 1.21 2000/09/12 14:14:55 morsch |
182 | Call fDecayer->ForceDecay() at the beginning of Generate(). |
183 | |
184 | Revision 1.20 2000/09/06 14:29:33 morsch |
185 | Use AliPythia for event generation an AliDecayPythia for decays. |
186 | Correct handling of "nodecay" option |
187 | |
188 | Revision 1.19 2000/07/11 18:24:56 fca |
189 | Coding convention corrections + few minor bug fixes |
190 | |
191 | Revision 1.18 2000/06/30 12:40:34 morsch |
192 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to |
193 | Geant units (cm). |
194 | |
195 | Revision 1.17 2000/06/09 20:34:07 morsch |
196 | All coding rule violations except RS3 corrected |
197 | |
198 | Revision 1.16 2000/05/15 15:04:20 morsch |
199 | The full event is written for fNtrack = -1 |
200 | Coding rule violations corrected. |
201 | |
202 | Revision 1.15 2000/04/26 10:14:24 morsch |
203 | Particles array has one entry more than pythia particle list. Upper bound of |
204 | particle loop changed to np-1 (R. Guernane, AM) |
205 | |
206 | Revision 1.14 2000/04/05 08:36:13 morsch |
207 | Check status code of particles in Pythia event |
208 | to avoid double counting as partonic state and final state particle. |
209 | |
210 | Revision 1.13 1999/11/09 07:38:48 fca |
211 | Changes for compatibility with version 2.23 of ROOT |
212 | |
213 | Revision 1.12 1999/11/03 17:43:20 fca |
214 | New version from G.Martinez & A.Morsch |
215 | |
216 | Revision 1.11 1999/09/29 09:24:14 fca |
217 | Introduction of the Copyright and cvs Log |
218 | */ |
219 | |
220 | // |
221 | // Generator using the TPythia interface (via AliPythia) |
222 | // to generate pp collisions. |
223 | // Using SetNuclei() also nuclear modifications to the structure functions |
224 | // can be taken into account. This makes, of course, only sense for the |
225 | // generation of the products of hard processes (heavy flavor, jets ...) |
226 | // |
227 | // andreas.morsch@cern.ch |
228 | // |
229 | |
230 | #include <TDatabasePDG.h> |
231 | #include <TParticle.h> |
232 | #include <TPDGCode.h> |
233 | #include <TSystem.h> |
234 | #include <TTree.h> |
235 | |
236 | #include "AliConst.h" |
237 | #include "AliDecayerPythia.h" |
238 | #include "AliGenPythia.h" |
239 | #include "AliGenPythiaEventHeader.h" |
240 | #include "AliPythia.h" |
241 | #include "AliRun.h" |
242 | |
243 | ClassImp(AliGenPythia) |
244 | |
245 | AliGenPythia::AliGenPythia() |
246 | :AliGenMC() |
247 | { |
248 | // Default Constructor |
249 | fParticles = 0; |
250 | fPythia = 0; |
251 | fDecayer = new AliDecayerPythia(); |
252 | SetEventListRange(); |
253 | SetJetPhiRange(); |
254 | SetJetEtaRange(); |
255 | SetJetEtRange(); |
256 | SetGammaPhiRange(); |
257 | SetGammaEtaRange(); |
258 | SetPtKick(); |
259 | } |
260 | |
261 | AliGenPythia::AliGenPythia(Int_t npart) |
262 | :AliGenMC(npart) |
263 | { |
264 | // default charm production at 5. 5 TeV |
265 | // semimuonic decay |
266 | // structure function GRVHO |
267 | // |
268 | fName = "Pythia"; |
269 | fTitle= "Particle Generator using PYTHIA"; |
270 | fXsection = 0.; |
271 | fNucA1=0; |
272 | fNucA2=0; |
273 | SetProcess(); |
274 | SetStrucFunc(); |
275 | SetForceDecay(); |
276 | SetPtHard(); |
277 | SetYHard(); |
278 | SetEnergyCMS(); |
279 | fDecayer = new AliDecayerPythia(); |
280 | // Set random number generator |
281 | sRandom=fRandom; |
282 | fFlavorSelect = 0; |
283 | // Produced particles |
284 | fParticles = new TClonesArray("TParticle",1000); |
285 | fEventVertex.Set(3); |
286 | SetEventListRange(); |
287 | SetJetPhiRange(); |
288 | SetJetEtaRange(); |
289 | SetJetEtRange(); |
290 | SetGammaPhiRange(); |
291 | SetGammaEtaRange(); |
292 | SetJetReconstructionMode(); |
293 | SetPtKick(); |
294 | // Options determining what to keep in the stack (Heavy flavour generation) |
295 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor |
296 | fFeedDownOpt = kTRUE; // allow feed down from higher family |
297 | // Fragmentation on/off |
298 | fFragmentation = kTRUE; |
299 | // Default counting mode |
300 | fCountMode = kCountAll; |
301 | } |
302 | |
303 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
304 | { |
305 | // copy constructor |
306 | Pythia.Copy(*this); |
307 | } |
308 | |
309 | AliGenPythia::~AliGenPythia() |
310 | { |
311 | // Destructor |
312 | } |
313 | |
314 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
315 | { |
316 | // Set a range of event numbers, for which a table |
317 | // of generated particle will be printed |
318 | fDebugEventFirst = eventFirst; |
319 | fDebugEventLast = eventLast; |
320 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; |
321 | } |
322 | |
323 | void AliGenPythia::Init() |
324 | { |
325 | // Initialisation |
326 | |
327 | SetMC(AliPythia::Instance()); |
328 | fPythia=(AliPythia*) fgMCEvGen; |
329 | // |
330 | fParentWeight=1./Float_t(fNpart); |
331 | // |
332 | // Forward Paramters to the AliPythia object |
333 | fDecayer->SetForceDecay(fForceDecay); |
334 | fDecayer->Init(); |
335 | |
336 | |
337 | fPythia->SetCKIN(3,fPtHardMin); |
338 | fPythia->SetCKIN(4,fPtHardMax); |
339 | fPythia->SetCKIN(7,fYHardMin); |
340 | fPythia->SetCKIN(8,fYHardMax); |
341 | |
342 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
343 | // Fragmentation? |
344 | if (fFragmentation) { |
345 | fPythia->SetMSTP(111,1); |
346 | } else { |
347 | fPythia->SetMSTP(111,0); |
348 | } |
349 | |
350 | |
351 | // initial state radiation |
352 | fPythia->SetMSTP(61,fGinit); |
353 | // final state radiation |
354 | fPythia->SetMSTP(71,fGfinal); |
355 | // pt - kick |
356 | if (fPtKick > 0.) { |
357 | fPythia->SetMSTP(91,1); |
358 | fPythia->SetPARP(91,fPtKick); |
359 | } else { |
360 | fPythia->SetMSTP(91,0); |
361 | } |
362 | |
363 | // fPythia->SetMSTJ(1,2); |
364 | // |
365 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
366 | |
367 | // Parent and Children Selection |
368 | switch (fProcess) |
369 | { |
370 | case kPyCharm: |
371 | case kPyCharmUnforced: |
adf4d898 |
372 | case kPyCharmPbPbMNR: |
aabc7187 |
373 | case kPyCharmppMNR: |
374 | case kPyCharmpPbMNR: |
8d2cd130 |
375 | fParentSelect[0] = 411; |
376 | fParentSelect[1] = 421; |
377 | fParentSelect[2] = 431; |
378 | fParentSelect[3] = 4122; |
379 | fFlavorSelect = 4; |
380 | break; |
adf4d898 |
381 | case kPyD0PbPbMNR: |
382 | case kPyD0pPbMNR: |
383 | case kPyD0ppMNR: |
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384 | fParentSelect[0] = 421; |
385 | fFlavorSelect = 4; |
386 | break; |
387 | case kPyBeauty: |
adf4d898 |
388 | case kPyBeautyPbPbMNR: |
389 | case kPyBeautypPbMNR: |
390 | case kPyBeautyppMNR: |
8d2cd130 |
391 | fParentSelect[0]= 511; |
392 | fParentSelect[1]= 521; |
393 | fParentSelect[2]= 531; |
394 | fParentSelect[3]= 5122; |
395 | fParentSelect[4]= 5132; |
396 | fParentSelect[5]= 5232; |
397 | fParentSelect[6]= 5332; |
398 | fFlavorSelect = 5; |
399 | break; |
400 | case kPyBeautyUnforced: |
401 | fParentSelect[0] = 511; |
402 | fParentSelect[1] = 521; |
403 | fParentSelect[2] = 531; |
404 | fParentSelect[3] = 5122; |
405 | fParentSelect[4] = 5132; |
406 | fParentSelect[5] = 5232; |
407 | fParentSelect[6] = 5332; |
408 | fFlavorSelect = 5; |
409 | break; |
410 | case kPyJpsiChi: |
411 | case kPyJpsi: |
412 | fParentSelect[0] = 443; |
413 | break; |
414 | case kPyMb: |
415 | case kPyMbNonDiffr: |
416 | case kPyJets: |
417 | case kPyDirectGamma: |
418 | break; |
419 | } |
420 | // |
421 | // This counts the total number of calls to Pyevnt() per run. |
422 | fTrialsRun = 0; |
423 | fQ = 0.; |
424 | fX1 = 0.; |
425 | fX2 = 0.; |
426 | fNev = 0 ; |
427 | // |
428 | AliGenMC::Init(); |
429 | } |
430 | |
431 | void AliGenPythia::Generate() |
432 | { |
433 | // Generate one event |
434 | fDecayer->ForceDecay(); |
435 | |
436 | Float_t polar[3] = {0,0,0}; |
437 | Float_t origin[3] = {0,0,0}; |
438 | Float_t p[3]; |
439 | // converts from mm/c to s |
440 | const Float_t kconv=0.001/2.999792458e8; |
441 | // |
442 | Int_t nt=0; |
443 | Int_t jev=0; |
444 | Int_t j, kf; |
445 | fTrials=0; |
446 | |
447 | // Set collision vertex position |
448 | if(fVertexSmear==kPerEvent) { |
449 | fPythia->SetMSTP(151,1); |
450 | for (j=0;j<3;j++) { |
451 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
452 | } |
453 | } else if (fVertexSmear==kPerTrack) { |
454 | fPythia->SetMSTP(151,0); |
455 | } |
456 | // event loop |
457 | while(1) |
458 | { |
459 | fPythia->Pyevnt(); |
460 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
461 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); |
462 | fTrials++; |
463 | |
464 | fPythia->ImportParticles(fParticles,"All"); |
465 | |
466 | // |
467 | // |
468 | // |
469 | Int_t i; |
470 | |
471 | Int_t np = fParticles->GetEntriesFast(); |
472 | if (np == 0 ) continue; |
473 | // Get event vertex and discard the event if the Z coord. is too big |
474 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
475 | Float_t distz = iparticle->Vz()/10.; |
476 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; |
477 | // |
478 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
479 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); |
480 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); |
481 | // |
482 | Int_t* pParent = new Int_t[np]; |
483 | Int_t* pSelected = new Int_t[np]; |
484 | Int_t* trackIt = new Int_t[np]; |
485 | for (i=0; i< np; i++) { |
486 | pParent[i] = -1; |
487 | pSelected[i] = 0; |
488 | trackIt[i] = 0; |
489 | } |
490 | |
491 | Int_t nc = 0; // Total n. of selected particles |
492 | Int_t nParents = 0; // Selected parents |
493 | Int_t nTkbles = 0; // Trackable particles |
494 | if (fProcess != kPyMb && fProcess != kPyJets && |
495 | fProcess != kPyDirectGamma && |
496 | fProcess != kPyMbNonDiffr) { |
497 | |
498 | for (i = 0; i<np; i++) { |
499 | iparticle = (TParticle *) fParticles->At(i); |
500 | Int_t ks = iparticle->GetStatusCode(); |
501 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
502 | // No initial state partons |
503 | if (ks==21) continue; |
504 | // |
505 | // Heavy Flavor Selection |
506 | // |
507 | // quark ? |
508 | kf = TMath::Abs(kf); |
509 | Int_t kfl = kf; |
510 | // meson ? |
511 | if (kfl > 10) kfl/=100; |
512 | // baryon |
513 | if (kfl > 10) kfl/=10; |
514 | if (kfl > 10) kfl/=10; |
515 | |
516 | Int_t ipa = iparticle->GetFirstMother()-1; |
517 | Int_t kfMo = 0; |
518 | |
519 | if (ipa > -1) { |
520 | TParticle * mother = (TParticle *) fParticles->At(ipa); |
521 | kfMo = TMath::Abs(mother->GetPdgCode()); |
522 | } |
523 | // What to keep in Stack? |
524 | Bool_t flavorOK = kFALSE; |
525 | Bool_t selectOK = kFALSE; |
526 | if (fFeedDownOpt) { |
527 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
528 | } else { |
529 | if (kfl > fFlavorSelect) { |
530 | nc = -1; |
531 | break; |
532 | } |
533 | if (kfl == fFlavorSelect) flavorOK = kTRUE; |
534 | } |
535 | switch (fStackFillOpt) { |
536 | case kFlavorSelection: |
537 | selectOK = kTRUE; |
538 | break; |
539 | case kParentSelection: |
540 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
541 | break; |
542 | } |
543 | if (flavorOK && selectOK) { |
544 | // |
545 | // Heavy flavor hadron or quark |
546 | // |
547 | // Kinematic seletion on final state heavy flavor mesons |
548 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) |
549 | { |
550 | continue; |
551 | } |
552 | pSelected[i] = 1; |
553 | if (ParentSelected(kf)) ++nParents; // Update parent count |
554 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
555 | } else { |
556 | // Kinematic seletion on decay products |
557 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) |
558 | && !KinematicSelection(iparticle, 1)) |
559 | { |
560 | continue; |
561 | } |
562 | // |
563 | // Decay products |
564 | // Select if mother was selected and is not tracked |
565 | |
566 | if (pSelected[ipa] && |
567 | !trackIt[ipa] && // mother will be tracked ? |
568 | kfMo != 5 && // mother is b-quark, don't store fragments |
569 | kfMo != 4 && // mother is c-quark, don't store fragments |
570 | kf != 92) // don't store string |
571 | { |
572 | // |
573 | // Semi-stable or de-selected: diselect decay products: |
574 | // |
575 | // |
576 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
577 | { |
578 | Int_t ipF = iparticle->GetFirstDaughter(); |
579 | Int_t ipL = iparticle->GetLastDaughter(); |
580 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; |
581 | } |
582 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); |
583 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; |
584 | } |
585 | } |
586 | if (pSelected[i] == -1) pSelected[i] = 0; |
587 | if (!pSelected[i]) continue; |
588 | // Count quarks only if you did not include fragmentation |
589 | if (fFragmentation && kf <= 10) continue; |
590 | nc++; |
591 | // Decision on tracking |
592 | trackIt[i] = 0; |
593 | // |
594 | // Track final state particle |
595 | if (ks == 1) trackIt[i] = 1; |
596 | // Track semi-stable particles |
597 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
598 | // Track particles selected by process if undecayed. |
599 | if (fForceDecay == kNoDecay) { |
600 | if (ParentSelected(kf)) trackIt[i] = 1; |
601 | } else { |
602 | if (ParentSelected(kf)) trackIt[i] = 0; |
603 | } |
604 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
605 | // |
606 | // |
607 | |
608 | } // particle selection loop |
609 | if (nc > 0) { |
610 | for (i = 0; i<np; i++) { |
611 | if (!pSelected[i]) continue; |
612 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
613 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
614 | Int_t ks = iparticle->GetStatusCode(); |
615 | p[0] = iparticle->Px(); |
616 | p[1] = iparticle->Py(); |
617 | p[2] = iparticle->Pz(); |
618 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; |
619 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; |
620 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; |
621 | Float_t tof = kconv*iparticle->T(); |
622 | Int_t ipa = iparticle->GetFirstMother()-1; |
623 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
624 | SetTrack(fTrackIt*trackIt[i] , |
625 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
626 | pParent[i] = nt; |
627 | KeepTrack(nt); |
628 | } // SetTrack loop |
629 | } |
630 | } else { |
631 | nc = GenerateMB(); |
632 | } // mb ? |
633 | |
634 | if (pParent) delete[] pParent; |
635 | if (pSelected) delete[] pSelected; |
636 | if (trackIt) delete[] trackIt; |
637 | |
638 | if (nc > 0) { |
639 | switch (fCountMode) { |
640 | case kCountAll: |
641 | // printf(" Count all \n"); |
642 | jev += nc; |
643 | break; |
644 | case kCountParents: |
645 | // printf(" Count parents \n"); |
646 | jev += nParents; |
647 | break; |
648 | case kCountTrackables: |
649 | // printf(" Count trackable \n"); |
650 | jev += nTkbles; |
651 | break; |
652 | } |
653 | if (jev >= fNpart || fNpart == -1) { |
654 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
655 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
656 | |
657 | fQ += fPythia->GetVINT(51); |
658 | fX1 += fPythia->GetVINT(41); |
659 | fX2 += fPythia->GetVINT(42); |
660 | fTrialsRun += fTrials; |
661 | fNev++; |
662 | MakeHeader(); |
663 | break; |
664 | } |
665 | } |
666 | } // event loop |
667 | SetHighWaterMark(nt); |
668 | // adjust weight due to kinematic selection |
669 | AdjustWeights(); |
670 | // get cross-section |
671 | fXsection=fPythia->GetPARI(1); |
672 | } |
673 | |
674 | Int_t AliGenPythia::GenerateMB() |
675 | { |
676 | // |
677 | // Min Bias selection and other global selections |
678 | // |
679 | Int_t i, kf, nt, iparent; |
680 | Int_t nc = 0; |
681 | Float_t p[3]; |
682 | Float_t polar[3] = {0,0,0}; |
683 | Float_t origin[3] = {0,0,0}; |
684 | // converts from mm/c to s |
685 | const Float_t kconv=0.001/2.999792458e8; |
686 | |
687 | Int_t np = fParticles->GetEntriesFast(); |
688 | Int_t* pParent = new Int_t[np]; |
689 | for (i=0; i< np; i++) pParent[i] = -1; |
690 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
691 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
692 | TParticle* jet2 = (TParticle *) fParticles->At(7); |
693 | if (!CheckTrigger(jet1, jet2)) return 0; |
694 | } |
695 | |
696 | for (i = 0; i<np; i++) { |
697 | Int_t trackIt = 0; |
698 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
699 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
700 | Int_t ks = iparticle->GetStatusCode(); |
701 | Int_t km = iparticle->GetFirstMother(); |
702 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
703 | (ks != 1) || |
704 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { |
705 | nc++; |
706 | if (ks == 1) trackIt = 1; |
707 | Int_t ipa = iparticle->GetFirstMother()-1; |
708 | |
709 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
710 | |
711 | // |
712 | // store track information |
713 | p[0] = iparticle->Px(); |
714 | p[1] = iparticle->Py(); |
715 | p[2] = iparticle->Pz(); |
716 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; |
717 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; |
718 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; |
719 | Float_t tof=kconv*iparticle->T(); |
720 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
721 | tof, kPPrimary, nt, 1., ks); |
722 | KeepTrack(nt); |
723 | pParent[i] = nt; |
724 | } // select particle |
725 | } // particle loop |
726 | |
727 | if (pParent) delete[] pParent; |
728 | |
729 | printf("\n I've put %i particles on the stack \n",nc); |
730 | return nc; |
731 | } |
732 | |
733 | |
734 | void AliGenPythia::FinishRun() |
735 | { |
736 | // Print x-section summary |
737 | fPythia->Pystat(1); |
738 | fQ /= fNev; |
739 | fX1 /= fNev; |
740 | fX2 /= fNev; |
741 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); |
742 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); |
743 | |
744 | |
745 | } |
746 | |
747 | void AliGenPythia::AdjustWeights() |
748 | { |
749 | // Adjust the weights after generation of all events |
750 | // |
751 | TParticle *part; |
752 | Int_t ntrack=gAlice->GetNtrack(); |
753 | for (Int_t i=0; i<ntrack; i++) { |
754 | part= gAlice->Particle(i); |
755 | part->SetWeight(part->GetWeight()*fKineBias); |
756 | } |
757 | } |
758 | |
759 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) |
760 | { |
761 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
762 | fNucA1 = a1; |
763 | fNucA2 = a2; |
764 | } |
765 | |
766 | |
767 | void AliGenPythia::MakeHeader() |
768 | { |
769 | // Builds the event header, to be called after each event |
770 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); |
771 | // |
772 | // Event type |
773 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
774 | // |
775 | // Number of trials |
776 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
777 | // |
778 | // Event Vertex |
779 | header->SetPrimaryVertex(fEventVertex); |
780 | // |
781 | // Jets that have triggered |
782 | if (fProcess == kPyJets) |
783 | { |
784 | Int_t ntrig, njet; |
785 | Float_t jets[4][10]; |
786 | GetJets(njet, ntrig, jets); |
787 | |
788 | for (Int_t i = 0; i < ntrig; i++) { |
789 | ((AliGenPythiaEventHeader*) header)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
790 | jets[3][i]); |
791 | } |
792 | } |
793 | gAlice->SetGenEventHeader(header); |
794 | } |
795 | |
796 | |
797 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
798 | { |
799 | // Check the kinematic trigger condition |
800 | // |
801 | Double_t eta[2]; |
802 | eta[0] = jet1->Eta(); |
803 | eta[1] = jet2->Eta(); |
804 | Double_t phi[2]; |
805 | phi[0] = jet1->Phi(); |
806 | phi[1] = jet2->Phi(); |
807 | Int_t pdg[2]; |
808 | pdg[0] = jet1->GetPdgCode(); |
809 | pdg[1] = jet2->GetPdgCode(); |
810 | Bool_t triggered = kFALSE; |
811 | |
812 | if (fProcess == kPyJets) { |
813 | Int_t njets = 0; |
814 | Int_t ntrig = 0; |
815 | Float_t jets[4][10]; |
816 | // |
817 | // Use Pythia clustering on parton level to determine jet axis |
818 | // |
819 | GetJets(njets, ntrig, jets); |
820 | |
821 | if (ntrig) triggered = kTRUE; |
822 | // |
823 | } else { |
824 | Int_t ij = 0; |
825 | Int_t ig = 1; |
826 | if (pdg[0] == kGamma) { |
827 | ij = 1; |
828 | ig = 0; |
829 | } |
830 | //Check eta range first... |
831 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && |
832 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) |
833 | { |
834 | //Eta is okay, now check phi range |
835 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && |
836 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) |
837 | { |
838 | triggered = kTRUE; |
839 | } |
840 | } |
841 | } |
842 | return triggered; |
843 | } |
844 | |
845 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
846 | { |
847 | // Assignment operator |
848 | return *this; |
849 | } |
850 | |
851 | void AliGenPythia::LoadEvent() |
852 | { |
853 | // |
854 | // Load event into Pythia Common Block |
855 | // |
856 | |
857 | |
858 | Int_t npart = (Int_t) (gAlice->TreeK())->GetEntries(); |
859 | (fPythia->GetPyjets())->N = npart; |
860 | |
861 | for (Int_t part = 0; part < npart; part++) { |
862 | TParticle *MPart = gAlice->Particle(part); |
863 | Int_t kf = MPart->GetPdgCode(); |
864 | Int_t ks = MPart->GetStatusCode(); |
865 | Float_t px = MPart->Px(); |
866 | Float_t py = MPart->Py(); |
867 | Float_t pz = MPart->Pz(); |
868 | Float_t e = MPart->Energy(); |
869 | Float_t p = TMath::Sqrt(px * px + py * py + pz * pz); |
870 | Float_t m = TMath::Sqrt(e * e - p * p); |
871 | |
872 | |
873 | (fPythia->GetPyjets())->P[0][part] = px; |
874 | (fPythia->GetPyjets())->P[1][part] = py; |
875 | (fPythia->GetPyjets())->P[2][part] = pz; |
876 | (fPythia->GetPyjets())->P[3][part] = e; |
877 | (fPythia->GetPyjets())->P[4][part] = m; |
878 | |
879 | (fPythia->GetPyjets())->K[1][part] = kf; |
880 | (fPythia->GetPyjets())->K[0][part] = ks; |
881 | } |
882 | } |
883 | |
884 | void AliGenPythia::RecJetsUA1(Float_t eCellMin, Float_t eCellSeed, Float_t eMin, Float_t rMax, |
885 | Int_t& njets, Float_t jets [4][50]) |
886 | { |
887 | // |
888 | // Calls the Pythia jet finding algorithm to find jets in the current event |
889 | // |
890 | // |
891 | // Configure detector (EMCAL like) |
892 | // |
893 | fPythia->SetPARU(51,2.); |
894 | fPythia->SetMSTU(51,Int_t(96 * 2./0.7)); |
895 | fPythia->SetMSTU(52,3 * 144); |
896 | // |
897 | // Configure Jet Finder |
898 | // |
899 | fPythia->SetPARU(58, eCellMin); |
900 | fPythia->SetPARU(52, eCellSeed); |
901 | fPythia->SetPARU(53, eMin); |
902 | fPythia->SetPARU(54, rMax); |
903 | fPythia->SetMSTU(54, 2); |
904 | // |
905 | // Save jets |
906 | Int_t n = fPythia->GetN(); |
907 | |
908 | // |
909 | // Run Jet Finder |
910 | fPythia->Pycell(njets); |
911 | Int_t i; |
912 | for (i = 0; i < njets; i++) { |
913 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
914 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
915 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
916 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
917 | |
918 | jets[0][i] = px; |
919 | jets[1][i] = py; |
920 | jets[2][i] = pz; |
921 | jets[3][i] = e; |
922 | } |
923 | } |
924 | |
925 | |
926 | |
927 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) |
928 | { |
929 | // |
930 | // Calls the Pythia clustering algorithm to find jets in the current event |
931 | // |
932 | Int_t n = fPythia->GetN(); |
933 | nJets = 0; |
934 | nJetsTrig = 0; |
935 | if (fJetReconstruction == kCluster) { |
936 | // |
937 | // Configure cluster algorithm |
938 | // |
939 | fPythia->SetPARU(43, 2.); |
940 | fPythia->SetMSTU(41, 1); |
941 | // |
942 | // Call cluster algorithm |
943 | // |
944 | fPythia->Pyclus(nJets); |
945 | // |
946 | // Loading jets from common block |
947 | // |
948 | } else { |
949 | // |
950 | // Configure detector (EMCAL like) |
951 | // |
952 | fPythia->SetPARU(51,2.); |
953 | fPythia->SetMSTU(51,Int_t(96 * 2./0.7)); |
954 | fPythia->SetMSTU(52,3 * 144); |
955 | // |
956 | // Configure Jet Finder |
957 | // |
958 | fPythia->SetPARU(58, 0.0); |
959 | fPythia->SetPARU(52, 4.0); |
960 | fPythia->SetPARU(53, 10.0); |
961 | fPythia->SetPARU(54, 1.0); |
962 | fPythia->SetMSTU(54, 2); |
963 | // |
964 | // Run Jet Finder |
965 | fPythia->Pycell(nJets); |
966 | } |
967 | |
968 | Int_t i; |
969 | for (i = 0; i < nJets; i++) { |
970 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
971 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
972 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
973 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
974 | Float_t pt = TMath::Sqrt(px * px + py * py); |
975 | Float_t phi = TMath::ATan2(py,px); |
976 | Float_t theta = TMath::ATan2(pt,pz); |
977 | Float_t et = e * TMath::Sin(theta); |
978 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); |
979 | |
980 | if ( |
981 | eta > fEtaMinJet && eta < fEtaMaxJet && |
982 | phi > fPhiMinJet && eta < fPhiMaxJet && |
983 | et > fEtMinJet && et < fEtMaxJet |
984 | ) |
985 | { |
986 | jets[0][nJetsTrig] = px; |
987 | jets[1][nJetsTrig] = py; |
988 | jets[2][nJetsTrig] = pz; |
989 | jets[3][nJetsTrig] = e; |
990 | nJetsTrig++; |
991 | |
992 | } else { |
993 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
994 | } |
995 | } |
996 | } |
997 | |
998 | |
999 | #ifdef never |
1000 | void AliGenPythia::Streamer(TBuffer &R__b) |
1001 | { |
1002 | // Stream an object of class AliGenPythia. |
1003 | |
1004 | if (R__b.IsReading()) { |
1005 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } |
1006 | AliGenerator::Streamer(R__b); |
1007 | R__b >> (Int_t&)fProcess; |
1008 | R__b >> (Int_t&)fStrucFunc; |
1009 | R__b >> (Int_t&)fForceDecay; |
1010 | R__b >> fEnergyCMS; |
1011 | R__b >> fKineBias; |
1012 | R__b >> fTrials; |
1013 | fParentSelect.Streamer(R__b); |
1014 | fChildSelect.Streamer(R__b); |
1015 | R__b >> fXsection; |
1016 | // (AliPythia::Instance())->Streamer(R__b); |
1017 | R__b >> fPtHardMin; |
1018 | R__b >> fPtHardMax; |
1019 | // if (fDecayer) fDecayer->Streamer(R__b); |
1020 | } else { |
1021 | R__b.WriteVersion(AliGenPythia::IsA()); |
1022 | AliGenerator::Streamer(R__b); |
1023 | R__b << (Int_t)fProcess; |
1024 | R__b << (Int_t)fStrucFunc; |
1025 | R__b << (Int_t)fForceDecay; |
1026 | R__b << fEnergyCMS; |
1027 | R__b << fKineBias; |
1028 | R__b << fTrials; |
1029 | fParentSelect.Streamer(R__b); |
1030 | fChildSelect.Streamer(R__b); |
1031 | R__b << fXsection; |
1032 | // R__b << fPythia; |
1033 | R__b << fPtHardMin; |
1034 | R__b << fPtHardMax; |
1035 | // fDecayer->Streamer(R__b); |
1036 | } |
1037 | } |
1038 | #endif |
1039 | |