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 | |
7cdba479 |
16 | /* $Id$ */ |
8d2cd130 |
17 | |
18 | // |
19 | // Generator using the TPythia interface (via AliPythia) |
20 | // to generate pp collisions. |
21 | // Using SetNuclei() also nuclear modifications to the structure functions |
22 | // can be taken into account. This makes, of course, only sense for the |
23 | // generation of the products of hard processes (heavy flavor, jets ...) |
24 | // |
25 | // andreas.morsch@cern.ch |
26 | // |
27 | |
28 | #include <TDatabasePDG.h> |
29 | #include <TParticle.h> |
30 | #include <TPDGCode.h> |
31 | #include <TSystem.h> |
32 | #include <TTree.h> |
33 | |
34 | #include "AliConst.h" |
35 | #include "AliDecayerPythia.h" |
36 | #include "AliGenPythia.h" |
37 | #include "AliGenPythiaEventHeader.h" |
38 | #include "AliPythia.h" |
7cdba479 |
39 | #include "AliPythiaRndm.h" |
8d2cd130 |
40 | #include "AliRun.h" |
7ea3ea5b |
41 | #include "AliStack.h" |
42 | #include "AliRunLoader.h" |
5d12ce38 |
43 | #include "AliMC.h" |
8d2cd130 |
44 | |
014a9521 |
45 | ClassImp(AliGenPythia) |
8d2cd130 |
46 | |
47 | AliGenPythia::AliGenPythia() |
48 | :AliGenMC() |
49 | { |
50 | // Default Constructor |
51 | fParticles = 0; |
52 | fPythia = 0; |
e5c87a3d |
53 | fHeader = 0; |
8d2cd130 |
54 | fDecayer = new AliDecayerPythia(); |
55 | SetEventListRange(); |
56 | SetJetPhiRange(); |
57 | SetJetEtaRange(); |
58 | SetJetEtRange(); |
59 | SetGammaPhiRange(); |
60 | SetGammaEtaRange(); |
61 | SetPtKick(); |
7ea3ea5b |
62 | SetQuench(); |
63 | |
1d568bc2 |
64 | fSetNuclei = kFALSE; |
7cdba479 |
65 | if (!AliPythiaRndm::GetPythiaRandom()) |
66 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
67 | } |
68 | |
69 | AliGenPythia::AliGenPythia(Int_t npart) |
70 | :AliGenMC(npart) |
71 | { |
72 | // default charm production at 5. 5 TeV |
73 | // semimuonic decay |
74 | // structure function GRVHO |
75 | // |
76 | fName = "Pythia"; |
77 | fTitle= "Particle Generator using PYTHIA"; |
78 | fXsection = 0.; |
8d2cd130 |
79 | SetProcess(); |
80 | SetStrucFunc(); |
81 | SetForceDecay(); |
82 | SetPtHard(); |
83 | SetYHard(); |
84 | SetEnergyCMS(); |
85 | fDecayer = new AliDecayerPythia(); |
86 | // Set random number generator |
7cdba479 |
87 | if (!AliPythiaRndm::GetPythiaRandom()) |
88 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
89 | fFlavorSelect = 0; |
90 | // Produced particles |
91 | fParticles = new TClonesArray("TParticle",1000); |
e5c87a3d |
92 | fHeader = 0; |
8d2cd130 |
93 | SetEventListRange(); |
94 | SetJetPhiRange(); |
95 | SetJetEtaRange(); |
96 | SetJetEtRange(); |
97 | SetGammaPhiRange(); |
98 | SetGammaEtaRange(); |
99 | SetJetReconstructionMode(); |
7ea3ea5b |
100 | SetQuench(); |
8d2cd130 |
101 | SetPtKick(); |
102 | // Options determining what to keep in the stack (Heavy flavour generation) |
103 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor |
104 | fFeedDownOpt = kTRUE; // allow feed down from higher family |
105 | // Fragmentation on/off |
106 | fFragmentation = kTRUE; |
107 | // Default counting mode |
108 | fCountMode = kCountAll; |
592f8307 |
109 | // Pycel |
110 | SetPycellParameters(); |
1d568bc2 |
111 | fSetNuclei = kFALSE; |
8d2cd130 |
112 | } |
113 | |
114 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
f936b8ea |
115 | :AliGenMC(Pythia) |
8d2cd130 |
116 | { |
117 | // copy constructor |
118 | Pythia.Copy(*this); |
119 | } |
120 | |
121 | AliGenPythia::~AliGenPythia() |
122 | { |
123 | // Destructor |
124 | } |
125 | |
592f8307 |
126 | void AliGenPythia::SetPycellParameters(Float_t etamax, Int_t neta, Int_t nphi, |
127 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) |
128 | { |
129 | // Set pycell parameters |
130 | fPycellEtaMax = etamax; |
131 | fPycellNEta = neta; |
132 | fPycellNPhi = nphi; |
133 | fPycellThreshold = thresh; |
134 | fPycellEtSeed = etseed; |
135 | fPycellMinEtJet = minet; |
136 | fPycellMaxRadius = r; |
137 | } |
138 | |
139 | |
140 | |
8d2cd130 |
141 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
142 | { |
143 | // Set a range of event numbers, for which a table |
144 | // of generated particle will be printed |
145 | fDebugEventFirst = eventFirst; |
146 | fDebugEventLast = eventLast; |
147 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; |
148 | } |
149 | |
150 | void AliGenPythia::Init() |
151 | { |
152 | // Initialisation |
153 | |
154 | SetMC(AliPythia::Instance()); |
b88f5cea |
155 | fPythia=(AliPythia*) fMCEvGen; |
e2bddf81 |
156 | |
8d2cd130 |
157 | // |
158 | fParentWeight=1./Float_t(fNpart); |
159 | // |
160 | // Forward Paramters to the AliPythia object |
161 | fDecayer->SetForceDecay(fForceDecay); |
162 | fDecayer->Init(); |
163 | |
164 | |
165 | fPythia->SetCKIN(3,fPtHardMin); |
166 | fPythia->SetCKIN(4,fPtHardMax); |
167 | fPythia->SetCKIN(7,fYHardMin); |
168 | fPythia->SetCKIN(8,fYHardMax); |
169 | |
1a626d4e |
170 | if (fAProjectile > 0 && fATarget > 0) fPythia->SetNuclei(fAProjectile, fATarget); |
8d2cd130 |
171 | // Fragmentation? |
172 | if (fFragmentation) { |
173 | fPythia->SetMSTP(111,1); |
174 | } else { |
175 | fPythia->SetMSTP(111,0); |
176 | } |
177 | |
178 | |
179 | // initial state radiation |
180 | fPythia->SetMSTP(61,fGinit); |
181 | // final state radiation |
182 | fPythia->SetMSTP(71,fGfinal); |
183 | // pt - kick |
184 | if (fPtKick > 0.) { |
185 | fPythia->SetMSTP(91,1); |
186 | fPythia->SetPARP(91,fPtKick); |
187 | } else { |
188 | fPythia->SetMSTP(91,0); |
189 | } |
190 | |
191 | // fPythia->SetMSTJ(1,2); |
192 | // |
193 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
194 | |
195 | // Parent and Children Selection |
196 | switch (fProcess) |
197 | { |
198 | case kPyCharm: |
199 | case kPyCharmUnforced: |
adf4d898 |
200 | case kPyCharmPbPbMNR: |
aabc7187 |
201 | case kPyCharmppMNR: |
202 | case kPyCharmpPbMNR: |
8d2cd130 |
203 | fParentSelect[0] = 411; |
204 | fParentSelect[1] = 421; |
205 | fParentSelect[2] = 431; |
206 | fParentSelect[3] = 4122; |
207 | fFlavorSelect = 4; |
208 | break; |
adf4d898 |
209 | case kPyD0PbPbMNR: |
210 | case kPyD0pPbMNR: |
211 | case kPyD0ppMNR: |
8d2cd130 |
212 | fParentSelect[0] = 421; |
213 | fFlavorSelect = 4; |
214 | break; |
90d7b703 |
215 | case kPyDPlusPbPbMNR: |
216 | case kPyDPluspPbMNR: |
217 | case kPyDPlusppMNR: |
218 | fParentSelect[0] = 411; |
219 | fFlavorSelect = 4; |
220 | break; |
8d2cd130 |
221 | case kPyBeauty: |
adf4d898 |
222 | case kPyBeautyPbPbMNR: |
223 | case kPyBeautypPbMNR: |
224 | case kPyBeautyppMNR: |
8d2cd130 |
225 | fParentSelect[0]= 511; |
226 | fParentSelect[1]= 521; |
227 | fParentSelect[2]= 531; |
228 | fParentSelect[3]= 5122; |
229 | fParentSelect[4]= 5132; |
230 | fParentSelect[5]= 5232; |
231 | fParentSelect[6]= 5332; |
232 | fFlavorSelect = 5; |
233 | break; |
234 | case kPyBeautyUnforced: |
235 | fParentSelect[0] = 511; |
236 | fParentSelect[1] = 521; |
237 | fParentSelect[2] = 531; |
238 | fParentSelect[3] = 5122; |
239 | fParentSelect[4] = 5132; |
240 | fParentSelect[5] = 5232; |
241 | fParentSelect[6] = 5332; |
242 | fFlavorSelect = 5; |
243 | break; |
244 | case kPyJpsiChi: |
245 | case kPyJpsi: |
246 | fParentSelect[0] = 443; |
247 | break; |
248 | case kPyMb: |
249 | case kPyMbNonDiffr: |
250 | case kPyJets: |
251 | case kPyDirectGamma: |
252 | break; |
253 | } |
254 | // |
592f8307 |
255 | // |
256 | // JetFinder for Trigger |
257 | // |
258 | // Configure detector (EMCAL like) |
259 | // |
260 | fPythia->SetPARU(51, fPycellEtaMax); |
261 | fPythia->SetMSTU(51, fPycellNEta); |
262 | fPythia->SetMSTU(52, fPycellNPhi); |
263 | // |
264 | // Configure Jet Finder |
265 | // |
266 | fPythia->SetPARU(58, fPycellThreshold); |
267 | fPythia->SetPARU(52, fPycellEtSeed); |
268 | fPythia->SetPARU(53, fPycellMinEtJet); |
269 | fPythia->SetPARU(54, fPycellMaxRadius); |
270 | fPythia->SetMSTU(54, 2); |
271 | // |
8d2cd130 |
272 | // This counts the total number of calls to Pyevnt() per run. |
273 | fTrialsRun = 0; |
274 | fQ = 0.; |
275 | fX1 = 0.; |
276 | fX2 = 0.; |
277 | fNev = 0 ; |
278 | // |
1d568bc2 |
279 | // |
280 | // |
8d2cd130 |
281 | AliGenMC::Init(); |
1d568bc2 |
282 | // |
283 | // |
284 | // |
285 | if (fSetNuclei) { |
286 | fDyBoost = 0; |
287 | Warning("Init","SetNuclei used. Use SetProjectile + SetTarget instead. fDyBoost has been reset to 0\n"); |
288 | } |
32d6ef7d |
289 | |
290 | if (fQuench) { |
86b6ad68 |
291 | fPythia->InitQuenching(0., 0.1, 6.e5, 0); |
32d6ef7d |
292 | } |
293 | |
8d2cd130 |
294 | } |
295 | |
296 | void AliGenPythia::Generate() |
297 | { |
298 | // Generate one event |
e5c87a3d |
299 | |
8d2cd130 |
300 | fDecayer->ForceDecay(); |
301 | |
302 | Float_t polar[3] = {0,0,0}; |
303 | Float_t origin[3] = {0,0,0}; |
a920faf9 |
304 | Float_t p[4]; |
8d2cd130 |
305 | // converts from mm/c to s |
306 | const Float_t kconv=0.001/2.999792458e8; |
307 | // |
308 | Int_t nt=0; |
309 | Int_t jev=0; |
310 | Int_t j, kf; |
311 | fTrials=0; |
2590ccf9 |
312 | |
8d2cd130 |
313 | |
314 | // Set collision vertex position |
2590ccf9 |
315 | if (fVertexSmear == kPerEvent) Vertex(); |
316 | |
8d2cd130 |
317 | // event loop |
318 | while(1) |
319 | { |
32d6ef7d |
320 | // |
321 | // If quenching option has been selected switch off fragmentation first |
322 | // |
7ea3ea5b |
323 | if (fQuench) { |
324 | fPythia->SetMSTJ(1, 0); |
325 | } |
32d6ef7d |
326 | // |
327 | // Produce event |
328 | // |
8d2cd130 |
329 | fPythia->Pyevnt(); |
7ea3ea5b |
330 | if (fQuench) { |
32d6ef7d |
331 | // |
332 | // Run quenching routine |
333 | // |
b6bbf811 |
334 | if (fQuench == 1) { |
335 | fPythia->Quench(); |
336 | } else { |
337 | fPythia->Pyquen(208., 0, 0.); |
338 | } |
339 | |
32d6ef7d |
340 | // |
341 | // Switch fragmentation on |
7ea3ea5b |
342 | fPythia->SetMSTJ(1, 1); |
32d6ef7d |
343 | // |
344 | // .. and perform fragmentation |
7ea3ea5b |
345 | fPythia->Pyexec(); |
346 | } |
347 | |
e2bddf81 |
348 | if (gAlice) { |
349 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
350 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); |
351 | } |
7ea3ea5b |
352 | |
8d2cd130 |
353 | fTrials++; |
8d2cd130 |
354 | fPythia->ImportParticles(fParticles,"All"); |
1d568bc2 |
355 | Boost(); |
8d2cd130 |
356 | // |
357 | // |
358 | // |
359 | Int_t i; |
360 | |
361 | Int_t np = fParticles->GetEntriesFast(); |
362 | if (np == 0 ) continue; |
8d2cd130 |
363 | // |
2590ccf9 |
364 | |
8d2cd130 |
365 | // |
366 | Int_t* pParent = new Int_t[np]; |
367 | Int_t* pSelected = new Int_t[np]; |
368 | Int_t* trackIt = new Int_t[np]; |
369 | for (i=0; i< np; i++) { |
370 | pParent[i] = -1; |
371 | pSelected[i] = 0; |
372 | trackIt[i] = 0; |
373 | } |
374 | |
375 | Int_t nc = 0; // Total n. of selected particles |
376 | Int_t nParents = 0; // Selected parents |
377 | Int_t nTkbles = 0; // Trackable particles |
378 | if (fProcess != kPyMb && fProcess != kPyJets && |
379 | fProcess != kPyDirectGamma && |
380 | fProcess != kPyMbNonDiffr) { |
381 | |
382 | for (i = 0; i<np; i++) { |
2590ccf9 |
383 | TParticle* iparticle = (TParticle *) fParticles->At(i); |
8d2cd130 |
384 | Int_t ks = iparticle->GetStatusCode(); |
385 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
386 | // No initial state partons |
387 | if (ks==21) continue; |
388 | // |
389 | // Heavy Flavor Selection |
390 | // |
391 | // quark ? |
392 | kf = TMath::Abs(kf); |
393 | Int_t kfl = kf; |
394 | // meson ? |
395 | if (kfl > 10) kfl/=100; |
396 | // baryon |
397 | if (kfl > 10) kfl/=10; |
398 | if (kfl > 10) kfl/=10; |
399 | |
400 | Int_t ipa = iparticle->GetFirstMother()-1; |
401 | Int_t kfMo = 0; |
402 | |
403 | if (ipa > -1) { |
404 | TParticle * mother = (TParticle *) fParticles->At(ipa); |
405 | kfMo = TMath::Abs(mother->GetPdgCode()); |
406 | } |
407 | // What to keep in Stack? |
408 | Bool_t flavorOK = kFALSE; |
409 | Bool_t selectOK = kFALSE; |
410 | if (fFeedDownOpt) { |
32d6ef7d |
411 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
8d2cd130 |
412 | } else { |
32d6ef7d |
413 | if (kfl > fFlavorSelect) { |
414 | nc = -1; |
415 | break; |
416 | } |
417 | if (kfl == fFlavorSelect) flavorOK = kTRUE; |
8d2cd130 |
418 | } |
419 | switch (fStackFillOpt) { |
420 | case kFlavorSelection: |
32d6ef7d |
421 | selectOK = kTRUE; |
422 | break; |
8d2cd130 |
423 | case kParentSelection: |
32d6ef7d |
424 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
425 | break; |
8d2cd130 |
426 | } |
427 | if (flavorOK && selectOK) { |
428 | // |
429 | // Heavy flavor hadron or quark |
430 | // |
431 | // Kinematic seletion on final state heavy flavor mesons |
432 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) |
433 | { |
434 | continue; |
435 | } |
436 | pSelected[i] = 1; |
437 | if (ParentSelected(kf)) ++nParents; // Update parent count |
438 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
439 | } else { |
440 | // Kinematic seletion on decay products |
441 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) |
442 | && !KinematicSelection(iparticle, 1)) |
443 | { |
444 | continue; |
445 | } |
446 | // |
447 | // Decay products |
448 | // Select if mother was selected and is not tracked |
449 | |
450 | if (pSelected[ipa] && |
451 | !trackIt[ipa] && // mother will be tracked ? |
452 | kfMo != 5 && // mother is b-quark, don't store fragments |
453 | kfMo != 4 && // mother is c-quark, don't store fragments |
454 | kf != 92) // don't store string |
455 | { |
456 | // |
457 | // Semi-stable or de-selected: diselect decay products: |
458 | // |
459 | // |
460 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
461 | { |
462 | Int_t ipF = iparticle->GetFirstDaughter(); |
463 | Int_t ipL = iparticle->GetLastDaughter(); |
464 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; |
465 | } |
466 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); |
467 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; |
468 | } |
469 | } |
470 | if (pSelected[i] == -1) pSelected[i] = 0; |
471 | if (!pSelected[i]) continue; |
472 | // Count quarks only if you did not include fragmentation |
473 | if (fFragmentation && kf <= 10) continue; |
474 | nc++; |
475 | // Decision on tracking |
476 | trackIt[i] = 0; |
477 | // |
478 | // Track final state particle |
479 | if (ks == 1) trackIt[i] = 1; |
480 | // Track semi-stable particles |
d25cfd65 |
481 | if ((ks == 1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
8d2cd130 |
482 | // Track particles selected by process if undecayed. |
483 | if (fForceDecay == kNoDecay) { |
484 | if (ParentSelected(kf)) trackIt[i] = 1; |
485 | } else { |
486 | if (ParentSelected(kf)) trackIt[i] = 0; |
487 | } |
488 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
489 | // |
490 | // |
491 | |
492 | } // particle selection loop |
493 | if (nc > 0) { |
494 | for (i = 0; i<np; i++) { |
495 | if (!pSelected[i]) continue; |
496 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
497 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
498 | Int_t ks = iparticle->GetStatusCode(); |
499 | p[0] = iparticle->Px(); |
500 | p[1] = iparticle->Py(); |
501 | p[2] = iparticle->Pz(); |
a920faf9 |
502 | p[3] = iparticle->Energy(); |
503 | |
2590ccf9 |
504 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
505 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
506 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
507 | |
8d2cd130 |
508 | Float_t tof = kconv*iparticle->T(); |
509 | Int_t ipa = iparticle->GetFirstMother()-1; |
510 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a920faf9 |
511 | |
512 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
513 | p[0], p[1], p[2], p[3], |
514 | origin[0], origin[1], origin[2], tof, |
515 | polar[0], polar[1], polar[2], |
516 | kPPrimary, nt, 1., ks); |
8d2cd130 |
517 | pParent[i] = nt; |
518 | KeepTrack(nt); |
642f15cf |
519 | } // PushTrack loop |
8d2cd130 |
520 | } |
521 | } else { |
522 | nc = GenerateMB(); |
523 | } // mb ? |
524 | |
525 | if (pParent) delete[] pParent; |
526 | if (pSelected) delete[] pSelected; |
527 | if (trackIt) delete[] trackIt; |
528 | |
529 | if (nc > 0) { |
530 | switch (fCountMode) { |
531 | case kCountAll: |
532 | // printf(" Count all \n"); |
533 | jev += nc; |
534 | break; |
535 | case kCountParents: |
536 | // printf(" Count parents \n"); |
537 | jev += nParents; |
538 | break; |
539 | case kCountTrackables: |
540 | // printf(" Count trackable \n"); |
541 | jev += nTkbles; |
542 | break; |
543 | } |
544 | if (jev >= fNpart || fNpart == -1) { |
545 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
546 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
547 | |
548 | fQ += fPythia->GetVINT(51); |
549 | fX1 += fPythia->GetVINT(41); |
550 | fX2 += fPythia->GetVINT(42); |
551 | fTrialsRun += fTrials; |
552 | fNev++; |
553 | MakeHeader(); |
554 | break; |
555 | } |
556 | } |
557 | } // event loop |
558 | SetHighWaterMark(nt); |
559 | // adjust weight due to kinematic selection |
b88f5cea |
560 | // AdjustWeights(); |
8d2cd130 |
561 | // get cross-section |
562 | fXsection=fPythia->GetPARI(1); |
563 | } |
564 | |
565 | Int_t AliGenPythia::GenerateMB() |
566 | { |
567 | // |
568 | // Min Bias selection and other global selections |
569 | // |
570 | Int_t i, kf, nt, iparent; |
571 | Int_t nc = 0; |
bf950da8 |
572 | Float_t p[4]; |
8d2cd130 |
573 | Float_t polar[3] = {0,0,0}; |
574 | Float_t origin[3] = {0,0,0}; |
575 | // converts from mm/c to s |
576 | const Float_t kconv=0.001/2.999792458e8; |
577 | |
578 | Int_t np = fParticles->GetEntriesFast(); |
579 | Int_t* pParent = new Int_t[np]; |
580 | for (i=0; i< np; i++) pParent[i] = -1; |
581 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
582 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
583 | TParticle* jet2 = (TParticle *) fParticles->At(7); |
584 | if (!CheckTrigger(jet1, jet2)) return 0; |
585 | } |
586 | |
587 | for (i = 0; i<np; i++) { |
588 | Int_t trackIt = 0; |
589 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
590 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
591 | Int_t ks = iparticle->GetStatusCode(); |
592 | Int_t km = iparticle->GetFirstMother(); |
593 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
594 | (ks != 1) || |
595 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { |
596 | nc++; |
597 | if (ks == 1) trackIt = 1; |
598 | Int_t ipa = iparticle->GetFirstMother()-1; |
599 | |
600 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
601 | |
602 | // |
603 | // store track information |
604 | p[0] = iparticle->Px(); |
605 | p[1] = iparticle->Py(); |
606 | p[2] = iparticle->Pz(); |
a920faf9 |
607 | p[3] = iparticle->Energy(); |
1406f599 |
608 | |
a920faf9 |
609 | |
2590ccf9 |
610 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
611 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
612 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
613 | |
8d2cd130 |
614 | Float_t tof=kconv*iparticle->T(); |
a920faf9 |
615 | |
616 | PushTrack(fTrackIt*trackIt, iparent, kf, |
617 | p[0], p[1], p[2], p[3], |
618 | origin[0], origin[1], origin[2], tof, |
619 | polar[0], polar[1], polar[2], |
620 | kPPrimary, nt, 1., ks); |
8d2cd130 |
621 | KeepTrack(nt); |
622 | pParent[i] = nt; |
623 | } // select particle |
624 | } // particle loop |
625 | |
626 | if (pParent) delete[] pParent; |
627 | |
628 | printf("\n I've put %i particles on the stack \n",nc); |
629 | return nc; |
630 | } |
631 | |
632 | |
633 | void AliGenPythia::FinishRun() |
634 | { |
635 | // Print x-section summary |
636 | fPythia->Pystat(1); |
637 | fQ /= fNev; |
638 | fX1 /= fNev; |
639 | fX2 /= fNev; |
640 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); |
641 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); |
642 | |
643 | |
644 | } |
645 | |
646 | void AliGenPythia::AdjustWeights() |
647 | { |
648 | // Adjust the weights after generation of all events |
649 | // |
e2bddf81 |
650 | if (gAlice) { |
651 | TParticle *part; |
652 | Int_t ntrack=gAlice->GetMCApp()->GetNtrack(); |
653 | for (Int_t i=0; i<ntrack; i++) { |
654 | part= gAlice->GetMCApp()->Particle(i); |
655 | part->SetWeight(part->GetWeight()*fKineBias); |
656 | } |
8d2cd130 |
657 | } |
658 | } |
659 | |
660 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) |
661 | { |
662 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
1d568bc2 |
663 | |
1a626d4e |
664 | fAProjectile = a1; |
665 | fATarget = a2; |
1d568bc2 |
666 | fSetNuclei = kTRUE; |
8d2cd130 |
667 | } |
668 | |
669 | |
670 | void AliGenPythia::MakeHeader() |
671 | { |
672 | // Builds the event header, to be called after each event |
e5c87a3d |
673 | if (fHeader) delete fHeader; |
674 | fHeader = new AliGenPythiaEventHeader("Pythia"); |
8d2cd130 |
675 | // |
676 | // Event type |
e5c87a3d |
677 | ((AliGenPythiaEventHeader*) fHeader)->SetProcessType(fPythia->GetMSTI(1)); |
8d2cd130 |
678 | // |
679 | // Number of trials |
e5c87a3d |
680 | ((AliGenPythiaEventHeader*) fHeader)->SetTrials(fTrials); |
8d2cd130 |
681 | // |
682 | // Event Vertex |
d25cfd65 |
683 | fHeader->SetPrimaryVertex(fVertex); |
8d2cd130 |
684 | // |
685 | // Jets that have triggered |
686 | if (fProcess == kPyJets) |
687 | { |
688 | Int_t ntrig, njet; |
689 | Float_t jets[4][10]; |
690 | GetJets(njet, ntrig, jets); |
691 | |
692 | for (Int_t i = 0; i < ntrig; i++) { |
e5c87a3d |
693 | ((AliGenPythiaEventHeader*) fHeader)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
8d2cd130 |
694 | jets[3][i]); |
695 | } |
696 | } |
e2bddf81 |
697 | if (gAlice) gAlice->SetGenEventHeader(fHeader); |
8d2cd130 |
698 | } |
699 | |
700 | |
701 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
702 | { |
703 | // Check the kinematic trigger condition |
704 | // |
705 | Double_t eta[2]; |
706 | eta[0] = jet1->Eta(); |
707 | eta[1] = jet2->Eta(); |
708 | Double_t phi[2]; |
709 | phi[0] = jet1->Phi(); |
710 | phi[1] = jet2->Phi(); |
711 | Int_t pdg[2]; |
712 | pdg[0] = jet1->GetPdgCode(); |
713 | pdg[1] = jet2->GetPdgCode(); |
714 | Bool_t triggered = kFALSE; |
715 | |
716 | if (fProcess == kPyJets) { |
717 | Int_t njets = 0; |
718 | Int_t ntrig = 0; |
719 | Float_t jets[4][10]; |
720 | // |
721 | // Use Pythia clustering on parton level to determine jet axis |
722 | // |
723 | GetJets(njets, ntrig, jets); |
724 | |
725 | if (ntrig) triggered = kTRUE; |
726 | // |
727 | } else { |
728 | Int_t ij = 0; |
729 | Int_t ig = 1; |
730 | if (pdg[0] == kGamma) { |
731 | ij = 1; |
732 | ig = 0; |
733 | } |
734 | //Check eta range first... |
735 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && |
736 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) |
737 | { |
738 | //Eta is okay, now check phi range |
739 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && |
740 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) |
741 | { |
742 | triggered = kTRUE; |
743 | } |
744 | } |
745 | } |
746 | return triggered; |
747 | } |
748 | |
749 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
750 | { |
751 | // Assignment operator |
014a9521 |
752 | rhs.Copy(*this); |
8d2cd130 |
753 | return *this; |
754 | } |
755 | |
32d6ef7d |
756 | void AliGenPythia::LoadEvent(AliStack* stack, Int_t flag) |
8d2cd130 |
757 | { |
758 | // |
759 | // Load event into Pythia Common Block |
760 | // |
761 | |
32d6ef7d |
762 | // AliRunLoader* rl = AliRunLoader::GetRunLoader(); |
763 | Int_t npart = stack -> GetNprimary(); |
764 | Int_t n0 = 0; |
765 | |
766 | if (!flag) { |
767 | (fPythia->GetPyjets())->N = npart; |
768 | } else { |
769 | n0 = (fPythia->GetPyjets())->N; |
770 | (fPythia->GetPyjets())->N = n0 + npart; |
771 | } |
772 | |
773 | |
8d2cd130 |
774 | for (Int_t part = 0; part < npart; part++) { |
32d6ef7d |
775 | TParticle *MPart = stack->Particle(part); |
776 | |
8d2cd130 |
777 | Int_t kf = MPart->GetPdgCode(); |
778 | Int_t ks = MPart->GetStatusCode(); |
32d6ef7d |
779 | |
8d2cd130 |
780 | Float_t px = MPart->Px(); |
781 | Float_t py = MPart->Py(); |
782 | Float_t pz = MPart->Pz(); |
783 | Float_t e = MPart->Energy(); |
a920faf9 |
784 | Float_t m = MPart->GetCalcMass(); |
8d2cd130 |
785 | |
786 | |
32d6ef7d |
787 | (fPythia->GetPyjets())->P[0][part+n0] = px; |
788 | (fPythia->GetPyjets())->P[1][part+n0] = py; |
789 | (fPythia->GetPyjets())->P[2][part+n0] = pz; |
790 | (fPythia->GetPyjets())->P[3][part+n0] = e; |
791 | (fPythia->GetPyjets())->P[4][part+n0] = m; |
8d2cd130 |
792 | |
32d6ef7d |
793 | (fPythia->GetPyjets())->K[1][part+n0] = kf; |
794 | (fPythia->GetPyjets())->K[0][part+n0] = ks; |
8d2cd130 |
795 | } |
796 | } |
797 | |
014a9521 |
798 | void AliGenPythia::RecJetsUA1(Int_t& njets, Float_t jets [4][50]) |
8d2cd130 |
799 | { |
800 | // |
801 | // Calls the Pythia jet finding algorithm to find jets in the current event |
802 | // |
803 | // |
8d2cd130 |
804 | // |
805 | // Save jets |
806 | Int_t n = fPythia->GetN(); |
807 | |
808 | // |
809 | // Run Jet Finder |
810 | fPythia->Pycell(njets); |
811 | Int_t i; |
812 | for (i = 0; i < njets; i++) { |
813 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
814 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
815 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
816 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
817 | |
818 | jets[0][i] = px; |
819 | jets[1][i] = py; |
820 | jets[2][i] = pz; |
821 | jets[3][i] = e; |
822 | } |
823 | } |
824 | |
825 | |
826 | |
827 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) |
828 | { |
829 | // |
830 | // Calls the Pythia clustering algorithm to find jets in the current event |
831 | // |
832 | Int_t n = fPythia->GetN(); |
833 | nJets = 0; |
834 | nJetsTrig = 0; |
835 | if (fJetReconstruction == kCluster) { |
836 | // |
837 | // Configure cluster algorithm |
838 | // |
839 | fPythia->SetPARU(43, 2.); |
840 | fPythia->SetMSTU(41, 1); |
841 | // |
842 | // Call cluster algorithm |
843 | // |
844 | fPythia->Pyclus(nJets); |
845 | // |
846 | // Loading jets from common block |
847 | // |
848 | } else { |
592f8307 |
849 | |
8d2cd130 |
850 | // |
851 | // Run Jet Finder |
852 | fPythia->Pycell(nJets); |
853 | } |
854 | |
855 | Int_t i; |
856 | for (i = 0; i < nJets; i++) { |
857 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
858 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
859 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
860 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
861 | Float_t pt = TMath::Sqrt(px * px + py * py); |
a920faf9 |
862 | Float_t phi = TMath::Pi() + TMath::ATan2(-py, -px); |
8d2cd130 |
863 | Float_t theta = TMath::ATan2(pt,pz); |
864 | Float_t et = e * TMath::Sin(theta); |
865 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); |
866 | |
867 | if ( |
868 | eta > fEtaMinJet && eta < fEtaMaxJet && |
675eb105 |
869 | phi > fPhiMinJet && phi < fPhiMaxJet && |
8d2cd130 |
870 | et > fEtMinJet && et < fEtMaxJet |
871 | ) |
872 | { |
873 | jets[0][nJetsTrig] = px; |
874 | jets[1][nJetsTrig] = py; |
875 | jets[2][nJetsTrig] = pz; |
876 | jets[3][nJetsTrig] = e; |
877 | nJetsTrig++; |
878 | |
879 | } else { |
880 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
881 | } |
882 | } |
883 | } |
884 | |
885 | |
886 | #ifdef never |
887 | void AliGenPythia::Streamer(TBuffer &R__b) |
888 | { |
889 | // Stream an object of class AliGenPythia. |
890 | |
891 | if (R__b.IsReading()) { |
892 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } |
893 | AliGenerator::Streamer(R__b); |
894 | R__b >> (Int_t&)fProcess; |
895 | R__b >> (Int_t&)fStrucFunc; |
896 | R__b >> (Int_t&)fForceDecay; |
897 | R__b >> fEnergyCMS; |
898 | R__b >> fKineBias; |
899 | R__b >> fTrials; |
900 | fParentSelect.Streamer(R__b); |
901 | fChildSelect.Streamer(R__b); |
902 | R__b >> fXsection; |
903 | // (AliPythia::Instance())->Streamer(R__b); |
904 | R__b >> fPtHardMin; |
905 | R__b >> fPtHardMax; |
906 | // if (fDecayer) fDecayer->Streamer(R__b); |
907 | } else { |
908 | R__b.WriteVersion(AliGenPythia::IsA()); |
909 | AliGenerator::Streamer(R__b); |
910 | R__b << (Int_t)fProcess; |
911 | R__b << (Int_t)fStrucFunc; |
912 | R__b << (Int_t)fForceDecay; |
913 | R__b << fEnergyCMS; |
914 | R__b << fKineBias; |
915 | R__b << fTrials; |
916 | fParentSelect.Streamer(R__b); |
917 | fChildSelect.Streamer(R__b); |
918 | R__b << fXsection; |
919 | // R__b << fPythia; |
920 | R__b << fPtHardMin; |
921 | R__b << fPtHardMax; |
922 | // fDecayer->Streamer(R__b); |
923 | } |
924 | } |
925 | #endif |
926 | |
90d7b703 |
927 | |