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 | $Log$ |
18 | Revision 1.69 2003/01/14 10:50:19 alibrary |
19 | Cleanup of STEER coding conventions |
20 | |
21 | Revision 1.68 2002/12/11 09:16:16 morsch |
22 | Use GetJets to fill header. |
23 | |
24 | Revision 1.67 2002/12/09 15:24:09 morsch |
25 | Same trigger routine can use Pycell or Pyclus. |
26 | |
27 | Revision 1.66 2002/12/09 08:22:56 morsch |
28 | UA1 jet finder (Pycell) for software triggering added. |
29 | |
30 | Revision 1.65 2002/11/19 08:57:10 morsch |
31 | Configuration of pt-kick added. |
32 | |
33 | Revision 1.64 2002/11/15 00:43:06 morsch |
34 | Changes for kPyJets |
35 | - initial and final state g-radiation + pt-kick default |
36 | - trigger based on parton clusters (using pyclus) |
37 | - trigger jets are stored in header. |
38 | |
39 | Revision 1.63 2002/10/14 14:55:35 hristov |
40 | Merging the VirtualMC branch to the main development branch (HEAD) |
41 | |
42 | Revision 1.52.4.4 2002/10/10 16:40:08 hristov |
43 | Updating VirtualMC to v3-09-02 |
44 | |
45 | Revision 1.62 2002/09/24 10:00:01 morsch |
46 | CheckTrigger() corrected. |
47 | |
48 | Revision 1.61 2002/07/30 09:52:38 morsch |
49 | Call SetGammaPhiRange() and SetGammaEtaRange() in the constructor. |
50 | |
51 | Revision 1.60 2002/07/19 14:49:03 morsch |
52 | Typo corrected. |
53 | |
54 | Revision 1.59 2002/07/19 14:35:36 morsch |
55 | Count total number of trials. Print mean Q, x1, x2. |
56 | |
57 | Revision 1.58 2002/07/17 10:04:09 morsch |
58 | SetYHard method added. |
59 | |
60 | Revision 1.57 2002/05/22 13:22:53 morsch |
61 | Process kPyMbNonDiffr added. |
62 | |
63 | Revision 1.56 2002/04/26 10:30:01 morsch |
64 | Option kPyBeautyPbMNR added. (N. Carrer). |
65 | |
66 | Revision 1.55 2002/04/17 10:23:56 morsch |
67 | Coding Rule violations corrected. |
68 | |
69 | Revision 1.54 2002/03/28 11:49:10 morsch |
70 | Pass status code in SetTrack. |
71 | |
72 | Revision 1.53 2002/03/25 14:51:13 morsch |
73 | New stack-fill and count options introduced (N. Carrer). |
74 | |
75 | Revision 1.51 2002/03/06 08:46:57 morsch |
76 | - Loop until np-1 |
77 | - delete dyn. alloc. arrays (N. Carrer) |
78 | |
79 | Revision 1.50 2002/03/03 13:48:50 morsch |
80 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR |
81 | NLO calculations (Nicola Carrer). |
82 | |
83 | Revision 1.49 2002/02/08 16:50:50 morsch |
84 | Add name and title in constructor. |
85 | |
86 | Revision 1.48 2001/12/20 11:44:28 morsch |
87 | Add kinematic bias for direct gamma production. |
88 | |
89 | Revision 1.47 2001/12/19 14:45:00 morsch |
90 | Store number of trials in header. |
91 | |
92 | Revision 1.46 2001/12/19 10:36:19 morsch |
93 | Add possibility if jet kinematic biasing. |
94 | |
95 | Revision 1.45 2001/11/28 08:06:52 morsch |
96 | Use fMaxLifeTime parameter. |
97 | |
98 | Revision 1.44 2001/11/27 13:13:07 morsch |
99 | Maximum lifetime for long-lived particles to be put on the stack is parameter. |
100 | It can be set via SetMaximumLifetime(..). |
101 | |
102 | Revision 1.43 2001/10/21 18:35:56 hristov |
103 | Several pointers were set to zero in the default constructors to avoid memory management problems |
104 | |
105 | Revision 1.42 2001/10/15 08:21:55 morsch |
106 | Vertex truncation settings moved to AliGenMC. |
107 | |
108 | Revision 1.41 2001/10/08 08:45:42 morsch |
109 | Possibility of vertex cut added. |
110 | |
111 | Revision 1.40 2001/09/25 11:30:23 morsch |
112 | Pass event vertex to header. |
113 | |
114 | Revision 1.39 2001/07/27 17:09:36 morsch |
115 | Use local SetTrack, KeepTrack and SetHighWaterMark methods |
116 | to delegate either to local stack or to stack owned by AliRun. |
117 | (Piotr Skowronski, A.M.) |
118 | |
119 | Revision 1.38 2001/07/13 10:58:54 morsch |
120 | - Some coded moved to AliGenMC |
121 | - Improved handling of secondary vertices. |
122 | |
123 | Revision 1.37 2001/06/28 11:17:28 morsch |
124 | SetEventListRange setter added. Events in specified range are listed for |
125 | debugging. (Yuri Kharlov) |
126 | |
127 | Revision 1.36 2001/03/30 07:05:49 morsch |
128 | Final print-out in finish run. |
129 | Write parton system for jet-production (preliminary solution). |
130 | |
131 | Revision 1.35 2001/03/09 13:03:40 morsch |
132 | Process_t and Struc_Func_t moved to AliPythia.h |
133 | |
134 | Revision 1.34 2001/02/14 15:50:40 hristov |
135 | The last particle in event marked using SetHighWaterMark |
136 | |
137 | Revision 1.33 2001/01/30 09:23:12 hristov |
138 | Streamers removed (R.Brun) |
139 | |
140 | Revision 1.32 2001/01/26 19:55:51 hristov |
141 | Major upgrade of AliRoot code |
142 | |
143 | Revision 1.31 2001/01/17 10:54:31 hristov |
144 | Better protection against FPE |
145 | |
146 | Revision 1.30 2000/12/18 08:55:35 morsch |
147 | Make AliPythia dependent generartors work with new scheme of random number generation |
148 | |
149 | Revision 1.29 2000/12/04 11:22:03 morsch |
150 | Init of sRandom as in 1.15 |
151 | |
152 | Revision 1.28 2000/12/02 11:41:39 morsch |
153 | Use SetRandom() to initialize random number generator in constructor. |
154 | |
155 | Revision 1.27 2000/11/30 20:29:02 morsch |
156 | Initialise static variable sRandom in constructor: sRandom = fRandom; |
157 | |
158 | Revision 1.26 2000/11/30 07:12:50 alibrary |
159 | Introducing new Rndm and QA classes |
160 | |
161 | Revision 1.25 2000/10/18 19:11:27 hristov |
162 | Division by zero fixed |
163 | |
164 | Revision 1.24 2000/09/18 10:41:35 morsch |
165 | Add possibility to use nuclear structure functions from PDF library V8. |
166 | |
167 | Revision 1.23 2000/09/14 14:05:40 morsch |
168 | dito |
169 | |
170 | Revision 1.22 2000/09/14 14:02:22 morsch |
171 | - Correct conversion from mm to cm when passing particle vertex to MC. |
172 | - Correct handling of fForceDecay == all. |
173 | |
174 | Revision 1.21 2000/09/12 14:14:55 morsch |
175 | Call fDecayer->ForceDecay() at the beginning of Generate(). |
176 | |
177 | Revision 1.20 2000/09/06 14:29:33 morsch |
178 | Use AliPythia for event generation an AliDecayPythia for decays. |
179 | Correct handling of "nodecay" option |
180 | |
181 | Revision 1.19 2000/07/11 18:24:56 fca |
182 | Coding convention corrections + few minor bug fixes |
183 | |
184 | Revision 1.18 2000/06/30 12:40:34 morsch |
185 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to |
186 | Geant units (cm). |
187 | |
188 | Revision 1.17 2000/06/09 20:34:07 morsch |
189 | All coding rule violations except RS3 corrected |
190 | |
191 | Revision 1.16 2000/05/15 15:04:20 morsch |
192 | The full event is written for fNtrack = -1 |
193 | Coding rule violations corrected. |
194 | |
195 | Revision 1.15 2000/04/26 10:14:24 morsch |
196 | Particles array has one entry more than pythia particle list. Upper bound of |
197 | particle loop changed to np-1 (R. Guernane, AM) |
198 | |
199 | Revision 1.14 2000/04/05 08:36:13 morsch |
200 | Check status code of particles in Pythia event |
201 | to avoid double counting as partonic state and final state particle. |
202 | |
203 | Revision 1.13 1999/11/09 07:38:48 fca |
204 | Changes for compatibility with version 2.23 of ROOT |
205 | |
206 | Revision 1.12 1999/11/03 17:43:20 fca |
207 | New version from G.Martinez & A.Morsch |
208 | |
209 | Revision 1.11 1999/09/29 09:24:14 fca |
210 | Introduction of the Copyright and cvs Log |
211 | */ |
212 | |
213 | // |
214 | // Generator using the TPythia interface (via AliPythia) |
215 | // to generate pp collisions. |
216 | // Using SetNuclei() also nuclear modifications to the structure functions |
217 | // can be taken into account. This makes, of course, only sense for the |
218 | // generation of the products of hard processes (heavy flavor, jets ...) |
219 | // |
220 | // andreas.morsch@cern.ch |
221 | // |
222 | |
223 | #include <TDatabasePDG.h> |
224 | #include <TParticle.h> |
225 | #include <TPDGCode.h> |
226 | #include <TSystem.h> |
227 | #include <TTree.h> |
228 | |
229 | #include "AliConst.h" |
230 | #include "AliDecayerPythia.h" |
231 | #include "AliGenPythia.h" |
232 | #include "AliGenPythiaEventHeader.h" |
233 | #include "AliPythia.h" |
234 | #include "AliRun.h" |
235 | |
236 | ClassImp(AliGenPythia) |
237 | |
238 | AliGenPythia::AliGenPythia() |
239 | :AliGenMC() |
240 | { |
241 | // Default Constructor |
242 | fParticles = 0; |
243 | fPythia = 0; |
244 | fDecayer = new AliDecayerPythia(); |
245 | SetEventListRange(); |
246 | SetJetPhiRange(); |
247 | SetJetEtaRange(); |
248 | SetJetEtRange(); |
249 | SetGammaPhiRange(); |
250 | SetGammaEtaRange(); |
251 | SetPtKick(); |
252 | } |
253 | |
254 | AliGenPythia::AliGenPythia(Int_t npart) |
255 | :AliGenMC(npart) |
256 | { |
257 | // default charm production at 5. 5 TeV |
258 | // semimuonic decay |
259 | // structure function GRVHO |
260 | // |
261 | fName = "Pythia"; |
262 | fTitle= "Particle Generator using PYTHIA"; |
263 | fXsection = 0.; |
264 | fNucA1=0; |
265 | fNucA2=0; |
266 | SetProcess(); |
267 | SetStrucFunc(); |
268 | SetForceDecay(); |
269 | SetPtHard(); |
270 | SetYHard(); |
271 | SetEnergyCMS(); |
272 | fDecayer = new AliDecayerPythia(); |
273 | // Set random number generator |
274 | sRandom=fRandom; |
275 | fFlavorSelect = 0; |
276 | // Produced particles |
277 | fParticles = new TClonesArray("TParticle",1000); |
278 | fEventVertex.Set(3); |
279 | SetEventListRange(); |
280 | SetJetPhiRange(); |
281 | SetJetEtaRange(); |
282 | SetJetEtRange(); |
283 | SetGammaPhiRange(); |
284 | SetGammaEtaRange(); |
285 | SetJetReconstructionMode(); |
286 | SetPtKick(); |
287 | // Options determining what to keep in the stack (Heavy flavour generation) |
288 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor |
289 | fFeedDownOpt = kTRUE; // allow feed down from higher family |
290 | // Fragmentation on/off |
291 | fFragmentation = kTRUE; |
292 | // Default counting mode |
293 | fCountMode = kCountAll; |
294 | } |
295 | |
296 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
297 | { |
298 | // copy constructor |
299 | Pythia.Copy(*this); |
300 | } |
301 | |
302 | AliGenPythia::~AliGenPythia() |
303 | { |
304 | // Destructor |
305 | } |
306 | |
307 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
308 | { |
309 | // Set a range of event numbers, for which a table |
310 | // of generated particle will be printed |
311 | fDebugEventFirst = eventFirst; |
312 | fDebugEventLast = eventLast; |
313 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; |
314 | } |
315 | |
316 | void AliGenPythia::Init() |
317 | { |
318 | // Initialisation |
319 | |
320 | SetMC(AliPythia::Instance()); |
321 | fPythia=(AliPythia*) fgMCEvGen; |
322 | // |
323 | fParentWeight=1./Float_t(fNpart); |
324 | // |
325 | // Forward Paramters to the AliPythia object |
326 | fDecayer->SetForceDecay(fForceDecay); |
327 | fDecayer->Init(); |
328 | |
329 | |
330 | fPythia->SetCKIN(3,fPtHardMin); |
331 | fPythia->SetCKIN(4,fPtHardMax); |
332 | fPythia->SetCKIN(7,fYHardMin); |
333 | fPythia->SetCKIN(8,fYHardMax); |
334 | |
335 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
336 | // Fragmentation? |
337 | if (fFragmentation) { |
338 | fPythia->SetMSTP(111,1); |
339 | } else { |
340 | fPythia->SetMSTP(111,0); |
341 | } |
342 | |
343 | |
344 | // initial state radiation |
345 | fPythia->SetMSTP(61,fGinit); |
346 | // final state radiation |
347 | fPythia->SetMSTP(71,fGfinal); |
348 | // pt - kick |
349 | if (fPtKick > 0.) { |
350 | fPythia->SetMSTP(91,1); |
351 | fPythia->SetPARP(91,fPtKick); |
352 | } else { |
353 | fPythia->SetMSTP(91,0); |
354 | } |
355 | |
356 | // fPythia->SetMSTJ(1,2); |
357 | // |
358 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
359 | |
360 | // Parent and Children Selection |
361 | switch (fProcess) |
362 | { |
363 | case kPyCharm: |
364 | case kPyCharmUnforced: |
365 | case kPyCharmPbMNR: |
366 | fParentSelect[0] = 411; |
367 | fParentSelect[1] = 421; |
368 | fParentSelect[2] = 431; |
369 | fParentSelect[3] = 4122; |
370 | fFlavorSelect = 4; |
371 | break; |
372 | case kPyD0PbMNR: |
373 | fParentSelect[0] = 421; |
374 | fFlavorSelect = 4; |
375 | break; |
376 | case kPyBeauty: |
377 | case kPyBeautyPbMNR: |
378 | fParentSelect[0]= 511; |
379 | fParentSelect[1]= 521; |
380 | fParentSelect[2]= 531; |
381 | fParentSelect[3]= 5122; |
382 | fParentSelect[4]= 5132; |
383 | fParentSelect[5]= 5232; |
384 | fParentSelect[6]= 5332; |
385 | fFlavorSelect = 5; |
386 | break; |
387 | case kPyBeautyUnforced: |
388 | fParentSelect[0] = 511; |
389 | fParentSelect[1] = 521; |
390 | fParentSelect[2] = 531; |
391 | fParentSelect[3] = 5122; |
392 | fParentSelect[4] = 5132; |
393 | fParentSelect[5] = 5232; |
394 | fParentSelect[6] = 5332; |
395 | fFlavorSelect = 5; |
396 | break; |
397 | case kPyJpsiChi: |
398 | case kPyJpsi: |
399 | fParentSelect[0] = 443; |
400 | break; |
401 | case kPyMb: |
402 | case kPyMbNonDiffr: |
403 | case kPyJets: |
404 | case kPyDirectGamma: |
405 | break; |
406 | } |
407 | // |
408 | // This counts the total number of calls to Pyevnt() per run. |
409 | fTrialsRun = 0; |
410 | fQ = 0.; |
411 | fX1 = 0.; |
412 | fX2 = 0.; |
413 | fNev = 0 ; |
414 | // |
415 | AliGenMC::Init(); |
416 | } |
417 | |
418 | void AliGenPythia::Generate() |
419 | { |
420 | // Generate one event |
421 | fDecayer->ForceDecay(); |
422 | |
423 | Float_t polar[3] = {0,0,0}; |
424 | Float_t origin[3] = {0,0,0}; |
425 | Float_t p[3]; |
426 | // converts from mm/c to s |
427 | const Float_t kconv=0.001/2.999792458e8; |
428 | // |
429 | Int_t nt=0; |
430 | Int_t jev=0; |
431 | Int_t j, kf; |
432 | fTrials=0; |
433 | |
434 | // Set collision vertex position |
435 | if(fVertexSmear==kPerEvent) { |
436 | fPythia->SetMSTP(151,1); |
437 | for (j=0;j<3;j++) { |
438 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
439 | } |
440 | } else if (fVertexSmear==kPerTrack) { |
441 | fPythia->SetMSTP(151,0); |
442 | } |
443 | // event loop |
444 | while(1) |
445 | { |
446 | fPythia->Pyevnt(); |
447 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
448 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); |
449 | fTrials++; |
450 | |
451 | fPythia->ImportParticles(fParticles,"All"); |
452 | |
453 | // |
454 | // |
455 | // |
456 | Int_t i; |
457 | |
458 | Int_t np = fParticles->GetEntriesFast(); |
459 | if (np == 0 ) continue; |
460 | // Get event vertex and discard the event if the Z coord. is too big |
461 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
462 | Float_t distz = iparticle->Vz()/10.; |
463 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; |
464 | // |
465 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
466 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); |
467 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); |
468 | // |
469 | Int_t* pParent = new Int_t[np]; |
470 | Int_t* pSelected = new Int_t[np]; |
471 | Int_t* trackIt = new Int_t[np]; |
472 | for (i=0; i< np; i++) { |
473 | pParent[i] = -1; |
474 | pSelected[i] = 0; |
475 | trackIt[i] = 0; |
476 | } |
477 | |
478 | Int_t nc = 0; // Total n. of selected particles |
479 | Int_t nParents = 0; // Selected parents |
480 | Int_t nTkbles = 0; // Trackable particles |
481 | if (fProcess != kPyMb && fProcess != kPyJets && |
482 | fProcess != kPyDirectGamma && |
483 | fProcess != kPyMbNonDiffr) { |
484 | |
485 | for (i = 0; i<np; i++) { |
486 | iparticle = (TParticle *) fParticles->At(i); |
487 | Int_t ks = iparticle->GetStatusCode(); |
488 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
489 | // No initial state partons |
490 | if (ks==21) continue; |
491 | // |
492 | // Heavy Flavor Selection |
493 | // |
494 | // quark ? |
495 | kf = TMath::Abs(kf); |
496 | Int_t kfl = kf; |
497 | // meson ? |
498 | if (kfl > 10) kfl/=100; |
499 | // baryon |
500 | if (kfl > 10) kfl/=10; |
501 | if (kfl > 10) kfl/=10; |
502 | |
503 | Int_t ipa = iparticle->GetFirstMother()-1; |
504 | Int_t kfMo = 0; |
505 | |
506 | if (ipa > -1) { |
507 | TParticle * mother = (TParticle *) fParticles->At(ipa); |
508 | kfMo = TMath::Abs(mother->GetPdgCode()); |
509 | } |
510 | // What to keep in Stack? |
511 | Bool_t flavorOK = kFALSE; |
512 | Bool_t selectOK = kFALSE; |
513 | if (fFeedDownOpt) { |
514 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
515 | } else { |
516 | if (kfl > fFlavorSelect) { |
517 | nc = -1; |
518 | break; |
519 | } |
520 | if (kfl == fFlavorSelect) flavorOK = kTRUE; |
521 | } |
522 | switch (fStackFillOpt) { |
523 | case kFlavorSelection: |
524 | selectOK = kTRUE; |
525 | break; |
526 | case kParentSelection: |
527 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
528 | break; |
529 | } |
530 | if (flavorOK && selectOK) { |
531 | // |
532 | // Heavy flavor hadron or quark |
533 | // |
534 | // Kinematic seletion on final state heavy flavor mesons |
535 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) |
536 | { |
537 | continue; |
538 | } |
539 | pSelected[i] = 1; |
540 | if (ParentSelected(kf)) ++nParents; // Update parent count |
541 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
542 | } else { |
543 | // Kinematic seletion on decay products |
544 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) |
545 | && !KinematicSelection(iparticle, 1)) |
546 | { |
547 | continue; |
548 | } |
549 | // |
550 | // Decay products |
551 | // Select if mother was selected and is not tracked |
552 | |
553 | if (pSelected[ipa] && |
554 | !trackIt[ipa] && // mother will be tracked ? |
555 | kfMo != 5 && // mother is b-quark, don't store fragments |
556 | kfMo != 4 && // mother is c-quark, don't store fragments |
557 | kf != 92) // don't store string |
558 | { |
559 | // |
560 | // Semi-stable or de-selected: diselect decay products: |
561 | // |
562 | // |
563 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
564 | { |
565 | Int_t ipF = iparticle->GetFirstDaughter(); |
566 | Int_t ipL = iparticle->GetLastDaughter(); |
567 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; |
568 | } |
569 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); |
570 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; |
571 | } |
572 | } |
573 | if (pSelected[i] == -1) pSelected[i] = 0; |
574 | if (!pSelected[i]) continue; |
575 | // Count quarks only if you did not include fragmentation |
576 | if (fFragmentation && kf <= 10) continue; |
577 | nc++; |
578 | // Decision on tracking |
579 | trackIt[i] = 0; |
580 | // |
581 | // Track final state particle |
582 | if (ks == 1) trackIt[i] = 1; |
583 | // Track semi-stable particles |
584 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
585 | // Track particles selected by process if undecayed. |
586 | if (fForceDecay == kNoDecay) { |
587 | if (ParentSelected(kf)) trackIt[i] = 1; |
588 | } else { |
589 | if (ParentSelected(kf)) trackIt[i] = 0; |
590 | } |
591 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
592 | // |
593 | // |
594 | |
595 | } // particle selection loop |
596 | if (nc > 0) { |
597 | for (i = 0; i<np; i++) { |
598 | if (!pSelected[i]) continue; |
599 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
600 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
601 | Int_t ks = iparticle->GetStatusCode(); |
602 | p[0] = iparticle->Px(); |
603 | p[1] = iparticle->Py(); |
604 | p[2] = iparticle->Pz(); |
605 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; |
606 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; |
607 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; |
608 | Float_t tof = kconv*iparticle->T(); |
609 | Int_t ipa = iparticle->GetFirstMother()-1; |
610 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
611 | SetTrack(fTrackIt*trackIt[i] , |
612 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
613 | pParent[i] = nt; |
614 | KeepTrack(nt); |
615 | } // SetTrack loop |
616 | } |
617 | } else { |
618 | nc = GenerateMB(); |
619 | } // mb ? |
620 | |
621 | if (pParent) delete[] pParent; |
622 | if (pSelected) delete[] pSelected; |
623 | if (trackIt) delete[] trackIt; |
624 | |
625 | if (nc > 0) { |
626 | switch (fCountMode) { |
627 | case kCountAll: |
628 | // printf(" Count all \n"); |
629 | jev += nc; |
630 | break; |
631 | case kCountParents: |
632 | // printf(" Count parents \n"); |
633 | jev += nParents; |
634 | break; |
635 | case kCountTrackables: |
636 | // printf(" Count trackable \n"); |
637 | jev += nTkbles; |
638 | break; |
639 | } |
640 | if (jev >= fNpart || fNpart == -1) { |
641 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
642 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
643 | |
644 | fQ += fPythia->GetVINT(51); |
645 | fX1 += fPythia->GetVINT(41); |
646 | fX2 += fPythia->GetVINT(42); |
647 | fTrialsRun += fTrials; |
648 | fNev++; |
649 | MakeHeader(); |
650 | break; |
651 | } |
652 | } |
653 | } // event loop |
654 | SetHighWaterMark(nt); |
655 | // adjust weight due to kinematic selection |
656 | AdjustWeights(); |
657 | // get cross-section |
658 | fXsection=fPythia->GetPARI(1); |
659 | } |
660 | |
661 | Int_t AliGenPythia::GenerateMB() |
662 | { |
663 | // |
664 | // Min Bias selection and other global selections |
665 | // |
666 | Int_t i, kf, nt, iparent; |
667 | Int_t nc = 0; |
668 | Float_t p[3]; |
669 | Float_t polar[3] = {0,0,0}; |
670 | Float_t origin[3] = {0,0,0}; |
671 | // converts from mm/c to s |
672 | const Float_t kconv=0.001/2.999792458e8; |
673 | |
674 | Int_t np = fParticles->GetEntriesFast(); |
675 | Int_t* pParent = new Int_t[np]; |
676 | for (i=0; i< np; i++) pParent[i] = -1; |
677 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
678 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
679 | TParticle* jet2 = (TParticle *) fParticles->At(7); |
680 | if (!CheckTrigger(jet1, jet2)) return 0; |
681 | } |
682 | |
683 | for (i = 0; i<np; i++) { |
684 | Int_t trackIt = 0; |
685 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
686 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
687 | Int_t ks = iparticle->GetStatusCode(); |
688 | Int_t km = iparticle->GetFirstMother(); |
689 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
690 | (ks != 1) || |
691 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { |
692 | nc++; |
693 | if (ks == 1) trackIt = 1; |
694 | Int_t ipa = iparticle->GetFirstMother()-1; |
695 | |
696 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
697 | |
698 | // |
699 | // store track information |
700 | p[0] = iparticle->Px(); |
701 | p[1] = iparticle->Py(); |
702 | p[2] = iparticle->Pz(); |
703 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; |
704 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; |
705 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; |
706 | Float_t tof=kconv*iparticle->T(); |
707 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
708 | tof, kPPrimary, nt, 1., ks); |
709 | KeepTrack(nt); |
710 | pParent[i] = nt; |
711 | } // select particle |
712 | } // particle loop |
713 | |
714 | if (pParent) delete[] pParent; |
715 | |
716 | printf("\n I've put %i particles on the stack \n",nc); |
717 | return nc; |
718 | } |
719 | |
720 | |
721 | void AliGenPythia::FinishRun() |
722 | { |
723 | // Print x-section summary |
724 | fPythia->Pystat(1); |
725 | fQ /= fNev; |
726 | fX1 /= fNev; |
727 | fX2 /= fNev; |
728 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); |
729 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); |
730 | |
731 | |
732 | } |
733 | |
734 | void AliGenPythia::AdjustWeights() |
735 | { |
736 | // Adjust the weights after generation of all events |
737 | // |
738 | TParticle *part; |
739 | Int_t ntrack=gAlice->GetNtrack(); |
740 | for (Int_t i=0; i<ntrack; i++) { |
741 | part= gAlice->Particle(i); |
742 | part->SetWeight(part->GetWeight()*fKineBias); |
743 | } |
744 | } |
745 | |
746 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) |
747 | { |
748 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
749 | fNucA1 = a1; |
750 | fNucA2 = a2; |
751 | } |
752 | |
753 | |
754 | void AliGenPythia::MakeHeader() |
755 | { |
756 | // Builds the event header, to be called after each event |
757 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); |
758 | // |
759 | // Event type |
760 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
761 | // |
762 | // Number of trials |
763 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
764 | // |
765 | // Event Vertex |
766 | header->SetPrimaryVertex(fEventVertex); |
767 | // |
768 | // Jets that have triggered |
769 | if (fProcess == kPyJets) |
770 | { |
771 | Int_t ntrig, njet; |
772 | Float_t jets[4][10]; |
773 | GetJets(njet, ntrig, jets); |
774 | |
775 | for (Int_t i = 0; i < ntrig; i++) { |
776 | ((AliGenPythiaEventHeader*) header)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
777 | jets[3][i]); |
778 | } |
779 | } |
780 | gAlice->SetGenEventHeader(header); |
781 | } |
782 | |
783 | |
784 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
785 | { |
786 | // Check the kinematic trigger condition |
787 | // |
788 | Double_t eta[2]; |
789 | eta[0] = jet1->Eta(); |
790 | eta[1] = jet2->Eta(); |
791 | Double_t phi[2]; |
792 | phi[0] = jet1->Phi(); |
793 | phi[1] = jet2->Phi(); |
794 | Int_t pdg[2]; |
795 | pdg[0] = jet1->GetPdgCode(); |
796 | pdg[1] = jet2->GetPdgCode(); |
797 | Bool_t triggered = kFALSE; |
798 | |
799 | if (fProcess == kPyJets) { |
800 | Int_t njets = 0; |
801 | Int_t ntrig = 0; |
802 | Float_t jets[4][10]; |
803 | // |
804 | // Use Pythia clustering on parton level to determine jet axis |
805 | // |
806 | GetJets(njets, ntrig, jets); |
807 | |
808 | if (ntrig) triggered = kTRUE; |
809 | // |
810 | } else { |
811 | Int_t ij = 0; |
812 | Int_t ig = 1; |
813 | if (pdg[0] == kGamma) { |
814 | ij = 1; |
815 | ig = 0; |
816 | } |
817 | //Check eta range first... |
818 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && |
819 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) |
820 | { |
821 | //Eta is okay, now check phi range |
822 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && |
823 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) |
824 | { |
825 | triggered = kTRUE; |
826 | } |
827 | } |
828 | } |
829 | return triggered; |
830 | } |
831 | |
832 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
833 | { |
834 | // Assignment operator |
835 | return *this; |
836 | } |
837 | |
838 | void AliGenPythia::LoadEvent() |
839 | { |
840 | // |
841 | // Load event into Pythia Common Block |
842 | // |
843 | |
844 | |
845 | Int_t npart = (Int_t) (gAlice->TreeK())->GetEntries(); |
846 | (fPythia->GetPyjets())->N = npart; |
847 | |
848 | for (Int_t part = 0; part < npart; part++) { |
849 | TParticle *MPart = gAlice->Particle(part); |
850 | Int_t kf = MPart->GetPdgCode(); |
851 | Int_t ks = MPart->GetStatusCode(); |
852 | Float_t px = MPart->Px(); |
853 | Float_t py = MPart->Py(); |
854 | Float_t pz = MPart->Pz(); |
855 | Float_t e = MPart->Energy(); |
856 | Float_t p = TMath::Sqrt(px * px + py * py + pz * pz); |
857 | Float_t m = TMath::Sqrt(e * e - p * p); |
858 | |
859 | |
860 | (fPythia->GetPyjets())->P[0][part] = px; |
861 | (fPythia->GetPyjets())->P[1][part] = py; |
862 | (fPythia->GetPyjets())->P[2][part] = pz; |
863 | (fPythia->GetPyjets())->P[3][part] = e; |
864 | (fPythia->GetPyjets())->P[4][part] = m; |
865 | |
866 | (fPythia->GetPyjets())->K[1][part] = kf; |
867 | (fPythia->GetPyjets())->K[0][part] = ks; |
868 | } |
869 | } |
870 | |
871 | void AliGenPythia::RecJetsUA1(Float_t eCellMin, Float_t eCellSeed, Float_t eMin, Float_t rMax, |
872 | Int_t& njets, Float_t jets [4][50]) |
873 | { |
874 | // |
875 | // Calls the Pythia jet finding algorithm to find jets in the current event |
876 | // |
877 | // |
878 | // Configure detector (EMCAL like) |
879 | // |
880 | fPythia->SetPARU(51,2.); |
881 | fPythia->SetMSTU(51,Int_t(96 * 2./0.7)); |
882 | fPythia->SetMSTU(52,3 * 144); |
883 | // |
884 | // Configure Jet Finder |
885 | // |
886 | fPythia->SetPARU(58, eCellMin); |
887 | fPythia->SetPARU(52, eCellSeed); |
888 | fPythia->SetPARU(53, eMin); |
889 | fPythia->SetPARU(54, rMax); |
890 | fPythia->SetMSTU(54, 2); |
891 | // |
892 | // Save jets |
893 | Int_t n = fPythia->GetN(); |
894 | |
895 | // |
896 | // Run Jet Finder |
897 | fPythia->Pycell(njets); |
898 | Int_t i; |
899 | for (i = 0; i < njets; i++) { |
900 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
901 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
902 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
903 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
904 | |
905 | jets[0][i] = px; |
906 | jets[1][i] = py; |
907 | jets[2][i] = pz; |
908 | jets[3][i] = e; |
909 | } |
910 | } |
911 | |
912 | |
913 | |
914 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) |
915 | { |
916 | // |
917 | // Calls the Pythia clustering algorithm to find jets in the current event |
918 | // |
919 | Int_t n = fPythia->GetN(); |
920 | nJets = 0; |
921 | nJetsTrig = 0; |
922 | if (fJetReconstruction == kCluster) { |
923 | // |
924 | // Configure cluster algorithm |
925 | // |
926 | fPythia->SetPARU(43, 2.); |
927 | fPythia->SetMSTU(41, 1); |
928 | // |
929 | // Call cluster algorithm |
930 | // |
931 | fPythia->Pyclus(nJets); |
932 | // |
933 | // Loading jets from common block |
934 | // |
935 | } else { |
936 | // |
937 | // Configure detector (EMCAL like) |
938 | // |
939 | fPythia->SetPARU(51,2.); |
940 | fPythia->SetMSTU(51,Int_t(96 * 2./0.7)); |
941 | fPythia->SetMSTU(52,3 * 144); |
942 | // |
943 | // Configure Jet Finder |
944 | // |
945 | fPythia->SetPARU(58, 0.0); |
946 | fPythia->SetPARU(52, 4.0); |
947 | fPythia->SetPARU(53, 10.0); |
948 | fPythia->SetPARU(54, 1.0); |
949 | fPythia->SetMSTU(54, 2); |
950 | // |
951 | // Run Jet Finder |
952 | fPythia->Pycell(nJets); |
953 | } |
954 | |
955 | Int_t i; |
956 | for (i = 0; i < nJets; i++) { |
957 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
958 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
959 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
960 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
961 | Float_t pt = TMath::Sqrt(px * px + py * py); |
962 | Float_t phi = TMath::ATan2(py,px); |
963 | Float_t theta = TMath::ATan2(pt,pz); |
964 | Float_t et = e * TMath::Sin(theta); |
965 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); |
966 | |
967 | if ( |
968 | eta > fEtaMinJet && eta < fEtaMaxJet && |
969 | phi > fPhiMinJet && eta < fPhiMaxJet && |
970 | et > fEtMinJet && et < fEtMaxJet |
971 | ) |
972 | { |
973 | jets[0][nJetsTrig] = px; |
974 | jets[1][nJetsTrig] = py; |
975 | jets[2][nJetsTrig] = pz; |
976 | jets[3][nJetsTrig] = e; |
977 | nJetsTrig++; |
978 | |
979 | } else { |
980 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
981 | } |
982 | } |
983 | } |
984 | |
985 | |
986 | #ifdef never |
987 | void AliGenPythia::Streamer(TBuffer &R__b) |
988 | { |
989 | // Stream an object of class AliGenPythia. |
990 | |
991 | if (R__b.IsReading()) { |
992 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } |
993 | AliGenerator::Streamer(R__b); |
994 | R__b >> (Int_t&)fProcess; |
995 | R__b >> (Int_t&)fStrucFunc; |
996 | R__b >> (Int_t&)fForceDecay; |
997 | R__b >> fEnergyCMS; |
998 | R__b >> fKineBias; |
999 | R__b >> fTrials; |
1000 | fParentSelect.Streamer(R__b); |
1001 | fChildSelect.Streamer(R__b); |
1002 | R__b >> fXsection; |
1003 | // (AliPythia::Instance())->Streamer(R__b); |
1004 | R__b >> fPtHardMin; |
1005 | R__b >> fPtHardMax; |
1006 | // if (fDecayer) fDecayer->Streamer(R__b); |
1007 | } else { |
1008 | R__b.WriteVersion(AliGenPythia::IsA()); |
1009 | AliGenerator::Streamer(R__b); |
1010 | R__b << (Int_t)fProcess; |
1011 | R__b << (Int_t)fStrucFunc; |
1012 | R__b << (Int_t)fForceDecay; |
1013 | R__b << fEnergyCMS; |
1014 | R__b << fKineBias; |
1015 | R__b << fTrials; |
1016 | fParentSelect.Streamer(R__b); |
1017 | fChildSelect.Streamer(R__b); |
1018 | R__b << fXsection; |
1019 | // R__b << fPythia; |
1020 | R__b << fPtHardMin; |
1021 | R__b << fPtHardMax; |
1022 | // fDecayer->Streamer(R__b); |
1023 | } |
1024 | } |
1025 | #endif |
1026 | |