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> |
8d2cd130 |
33 | #include "AliConst.h" |
34 | #include "AliDecayerPythia.h" |
35 | #include "AliGenPythia.h" |
5fa4b20b |
36 | #include "AliHeader.h" |
8d2cd130 |
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" |
7c21f297 |
44 | #include "pyquenCommon.h" |
8d2cd130 |
45 | |
014a9521 |
46 | ClassImp(AliGenPythia) |
8d2cd130 |
47 | |
48 | AliGenPythia::AliGenPythia() |
49 | :AliGenMC() |
50 | { |
51 | // Default Constructor |
52 | fParticles = 0; |
53 | fPythia = 0; |
e5c87a3d |
54 | fHeader = 0; |
5fffd0fe |
55 | fReadFromFile = 0; |
8d2cd130 |
56 | fDecayer = new AliDecayerPythia(); |
57 | SetEventListRange(); |
58 | SetJetPhiRange(); |
59 | SetJetEtaRange(); |
60 | SetJetEtRange(); |
61 | SetGammaPhiRange(); |
62 | SetGammaEtaRange(); |
63 | SetPtKick(); |
7ea3ea5b |
64 | SetQuench(); |
5fa4b20b |
65 | SetHadronisation(); |
1d568bc2 |
66 | fSetNuclei = kFALSE; |
7cdba479 |
67 | if (!AliPythiaRndm::GetPythiaRandom()) |
68 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
69 | } |
70 | |
71 | AliGenPythia::AliGenPythia(Int_t npart) |
72 | :AliGenMC(npart) |
73 | { |
74 | // default charm production at 5. 5 TeV |
75 | // semimuonic decay |
76 | // structure function GRVHO |
77 | // |
78 | fName = "Pythia"; |
79 | fTitle= "Particle Generator using PYTHIA"; |
80 | fXsection = 0.; |
5fffd0fe |
81 | fReadFromFile = 0; |
8d2cd130 |
82 | SetProcess(); |
83 | SetStrucFunc(); |
84 | SetForceDecay(); |
85 | SetPtHard(); |
86 | SetYHard(); |
87 | SetEnergyCMS(); |
88 | fDecayer = new AliDecayerPythia(); |
89 | // Set random number generator |
7cdba479 |
90 | if (!AliPythiaRndm::GetPythiaRandom()) |
91 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
92 | fFlavorSelect = 0; |
93 | // Produced particles |
94 | fParticles = new TClonesArray("TParticle",1000); |
e5c87a3d |
95 | fHeader = 0; |
8d2cd130 |
96 | SetEventListRange(); |
97 | SetJetPhiRange(); |
98 | SetJetEtaRange(); |
99 | SetJetEtRange(); |
100 | SetGammaPhiRange(); |
101 | SetGammaEtaRange(); |
102 | SetJetReconstructionMode(); |
7ea3ea5b |
103 | SetQuench(); |
5fa4b20b |
104 | SetHadronisation(); |
8d2cd130 |
105 | SetPtKick(); |
106 | // Options determining what to keep in the stack (Heavy flavour generation) |
107 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor |
108 | fFeedDownOpt = kTRUE; // allow feed down from higher family |
109 | // Fragmentation on/off |
110 | fFragmentation = kTRUE; |
111 | // Default counting mode |
112 | fCountMode = kCountAll; |
592f8307 |
113 | // Pycel |
114 | SetPycellParameters(); |
1d568bc2 |
115 | fSetNuclei = kFALSE; |
8d2cd130 |
116 | } |
117 | |
118 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
f936b8ea |
119 | :AliGenMC(Pythia) |
8d2cd130 |
120 | { |
121 | // copy constructor |
122 | Pythia.Copy(*this); |
123 | } |
124 | |
125 | AliGenPythia::~AliGenPythia() |
126 | { |
127 | // Destructor |
128 | } |
129 | |
592f8307 |
130 | void AliGenPythia::SetPycellParameters(Float_t etamax, Int_t neta, Int_t nphi, |
131 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) |
132 | { |
133 | // Set pycell parameters |
134 | fPycellEtaMax = etamax; |
135 | fPycellNEta = neta; |
136 | fPycellNPhi = nphi; |
137 | fPycellThreshold = thresh; |
138 | fPycellEtSeed = etseed; |
139 | fPycellMinEtJet = minet; |
140 | fPycellMaxRadius = r; |
141 | } |
142 | |
143 | |
144 | |
8d2cd130 |
145 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
146 | { |
147 | // Set a range of event numbers, for which a table |
148 | // of generated particle will be printed |
149 | fDebugEventFirst = eventFirst; |
150 | fDebugEventLast = eventLast; |
151 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; |
152 | } |
153 | |
154 | void AliGenPythia::Init() |
155 | { |
156 | // Initialisation |
157 | |
158 | SetMC(AliPythia::Instance()); |
b88f5cea |
159 | fPythia=(AliPythia*) fMCEvGen; |
e2bddf81 |
160 | |
8d2cd130 |
161 | // |
162 | fParentWeight=1./Float_t(fNpart); |
163 | // |
164 | // Forward Paramters to the AliPythia object |
165 | fDecayer->SetForceDecay(fForceDecay); |
166 | fDecayer->Init(); |
167 | |
168 | |
169 | fPythia->SetCKIN(3,fPtHardMin); |
170 | fPythia->SetCKIN(4,fPtHardMax); |
171 | fPythia->SetCKIN(7,fYHardMin); |
172 | fPythia->SetCKIN(8,fYHardMax); |
173 | |
1a626d4e |
174 | if (fAProjectile > 0 && fATarget > 0) fPythia->SetNuclei(fAProjectile, fATarget); |
8d2cd130 |
175 | // Fragmentation? |
176 | if (fFragmentation) { |
177 | fPythia->SetMSTP(111,1); |
178 | } else { |
179 | fPythia->SetMSTP(111,0); |
180 | } |
181 | |
182 | |
183 | // initial state radiation |
184 | fPythia->SetMSTP(61,fGinit); |
185 | // final state radiation |
186 | fPythia->SetMSTP(71,fGfinal); |
187 | // pt - kick |
188 | if (fPtKick > 0.) { |
189 | fPythia->SetMSTP(91,1); |
190 | fPythia->SetPARP(91,fPtKick); |
191 | } else { |
192 | fPythia->SetMSTP(91,0); |
193 | } |
194 | |
5fa4b20b |
195 | |
196 | if (fReadFromFile) { |
197 | fRL = AliRunLoader::Open(fFileName, "Partons"); |
198 | fRL->LoadKinematics(); |
199 | fRL->LoadHeader(); |
200 | } else { |
201 | fRL = 0x0; |
202 | } |
203 | |
204 | |
8d2cd130 |
205 | // |
206 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
207 | |
208 | // Parent and Children Selection |
209 | switch (fProcess) |
210 | { |
211 | case kPyCharm: |
212 | case kPyCharmUnforced: |
adf4d898 |
213 | case kPyCharmPbPbMNR: |
aabc7187 |
214 | case kPyCharmppMNR: |
215 | case kPyCharmpPbMNR: |
8d2cd130 |
216 | fParentSelect[0] = 411; |
217 | fParentSelect[1] = 421; |
218 | fParentSelect[2] = 431; |
219 | fParentSelect[3] = 4122; |
220 | fFlavorSelect = 4; |
221 | break; |
adf4d898 |
222 | case kPyD0PbPbMNR: |
223 | case kPyD0pPbMNR: |
224 | case kPyD0ppMNR: |
8d2cd130 |
225 | fParentSelect[0] = 421; |
226 | fFlavorSelect = 4; |
227 | break; |
90d7b703 |
228 | case kPyDPlusPbPbMNR: |
229 | case kPyDPluspPbMNR: |
230 | case kPyDPlusppMNR: |
231 | fParentSelect[0] = 411; |
232 | fFlavorSelect = 4; |
233 | break; |
8d2cd130 |
234 | case kPyBeauty: |
adf4d898 |
235 | case kPyBeautyPbPbMNR: |
236 | case kPyBeautypPbMNR: |
237 | case kPyBeautyppMNR: |
8d2cd130 |
238 | fParentSelect[0]= 511; |
239 | fParentSelect[1]= 521; |
240 | fParentSelect[2]= 531; |
241 | fParentSelect[3]= 5122; |
242 | fParentSelect[4]= 5132; |
243 | fParentSelect[5]= 5232; |
244 | fParentSelect[6]= 5332; |
245 | fFlavorSelect = 5; |
246 | break; |
247 | case kPyBeautyUnforced: |
248 | fParentSelect[0] = 511; |
249 | fParentSelect[1] = 521; |
250 | fParentSelect[2] = 531; |
251 | fParentSelect[3] = 5122; |
252 | fParentSelect[4] = 5132; |
253 | fParentSelect[5] = 5232; |
254 | fParentSelect[6] = 5332; |
255 | fFlavorSelect = 5; |
256 | break; |
257 | case kPyJpsiChi: |
258 | case kPyJpsi: |
259 | fParentSelect[0] = 443; |
260 | break; |
261 | case kPyMb: |
262 | case kPyMbNonDiffr: |
263 | case kPyJets: |
264 | case kPyDirectGamma: |
265 | break; |
589380c6 |
266 | case kPyW: |
267 | break; |
8d2cd130 |
268 | } |
269 | // |
592f8307 |
270 | // |
271 | // JetFinder for Trigger |
272 | // |
273 | // Configure detector (EMCAL like) |
274 | // |
275 | fPythia->SetPARU(51, fPycellEtaMax); |
276 | fPythia->SetMSTU(51, fPycellNEta); |
277 | fPythia->SetMSTU(52, fPycellNPhi); |
278 | // |
279 | // Configure Jet Finder |
280 | // |
281 | fPythia->SetPARU(58, fPycellThreshold); |
282 | fPythia->SetPARU(52, fPycellEtSeed); |
283 | fPythia->SetPARU(53, fPycellMinEtJet); |
284 | fPythia->SetPARU(54, fPycellMaxRadius); |
285 | fPythia->SetMSTU(54, 2); |
286 | // |
8d2cd130 |
287 | // This counts the total number of calls to Pyevnt() per run. |
288 | fTrialsRun = 0; |
289 | fQ = 0.; |
290 | fX1 = 0.; |
291 | fX2 = 0.; |
292 | fNev = 0 ; |
293 | // |
1d568bc2 |
294 | // |
295 | // |
8d2cd130 |
296 | AliGenMC::Init(); |
1d568bc2 |
297 | // |
298 | // |
299 | // |
300 | if (fSetNuclei) { |
301 | fDyBoost = 0; |
302 | Warning("Init","SetNuclei used. Use SetProjectile + SetTarget instead. fDyBoost has been reset to 0\n"); |
303 | } |
32d6ef7d |
304 | |
305 | if (fQuench) { |
5fa4b20b |
306 | fPythia->InitQuenching(0., 0.1, 0.6e6, 0); |
32d6ef7d |
307 | } |
308 | |
8d2cd130 |
309 | } |
310 | |
311 | void AliGenPythia::Generate() |
312 | { |
313 | // Generate one event |
e5c87a3d |
314 | |
8d2cd130 |
315 | fDecayer->ForceDecay(); |
316 | |
317 | Float_t polar[3] = {0,0,0}; |
318 | Float_t origin[3] = {0,0,0}; |
a920faf9 |
319 | Float_t p[4]; |
8d2cd130 |
320 | // converts from mm/c to s |
321 | const Float_t kconv=0.001/2.999792458e8; |
322 | // |
323 | Int_t nt=0; |
324 | Int_t jev=0; |
325 | Int_t j, kf; |
326 | fTrials=0; |
2590ccf9 |
327 | |
8d2cd130 |
328 | |
329 | // Set collision vertex position |
2590ccf9 |
330 | if (fVertexSmear == kPerEvent) Vertex(); |
331 | |
8d2cd130 |
332 | // event loop |
333 | while(1) |
334 | { |
32d6ef7d |
335 | // |
5fa4b20b |
336 | // Produce event |
32d6ef7d |
337 | // |
32d6ef7d |
338 | // |
5fa4b20b |
339 | // Switch hadronisation off |
340 | // |
341 | fPythia->SetMSTJ(1, 0); |
32d6ef7d |
342 | // |
5fa4b20b |
343 | // Either produce new event or read partons from file |
344 | // |
345 | if (!fReadFromFile) { |
346 | fPythia->Pyevnt(); |
347 | fNpartons = fPythia->GetN(); |
348 | } else { |
349 | printf("Loading Event %d\n",AliRunLoader::GetRunLoader()->GetEventNumber()); |
350 | fRL->GetEvent(AliRunLoader::GetRunLoader()->GetEventNumber()); |
351 | fPythia->SetN(0); |
352 | LoadEvent(fRL->Stack(), 0 , 1); |
353 | fPythia->Pyedit(21); |
354 | } |
355 | |
32d6ef7d |
356 | // |
357 | // Run quenching routine |
358 | // |
5fa4b20b |
359 | if (fQuench == 1) { |
360 | fPythia->Quench(); |
361 | } else if (fQuench == 2){ |
362 | fPythia->Pyquen(208., 0, 0.); |
363 | } |
32d6ef7d |
364 | // |
5fa4b20b |
365 | // Switch hadronisation on |
32d6ef7d |
366 | // |
5fa4b20b |
367 | fPythia->SetMSTJ(1, 1); |
368 | // |
369 | // .. and perform hadronisation |
370 | // printf("Calling hadronisation %d\n", fPythia->GetN()); |
371 | fPythia->Pyexec(); |
8d2cd130 |
372 | fTrials++; |
8d2cd130 |
373 | fPythia->ImportParticles(fParticles,"All"); |
1d568bc2 |
374 | Boost(); |
8d2cd130 |
375 | // |
376 | // |
377 | // |
378 | Int_t i; |
379 | |
5fa4b20b |
380 | |
8d2cd130 |
381 | Int_t np = fParticles->GetEntriesFast(); |
5fa4b20b |
382 | |
7c21f297 |
383 | if (np == 0) continue; |
8d2cd130 |
384 | // |
2590ccf9 |
385 | |
8d2cd130 |
386 | // |
387 | Int_t* pParent = new Int_t[np]; |
388 | Int_t* pSelected = new Int_t[np]; |
389 | Int_t* trackIt = new Int_t[np]; |
5fa4b20b |
390 | for (i = 0; i < np; i++) { |
8d2cd130 |
391 | pParent[i] = -1; |
392 | pSelected[i] = 0; |
393 | trackIt[i] = 0; |
394 | } |
395 | |
396 | Int_t nc = 0; // Total n. of selected particles |
397 | Int_t nParents = 0; // Selected parents |
398 | Int_t nTkbles = 0; // Trackable particles |
399 | if (fProcess != kPyMb && fProcess != kPyJets && |
400 | fProcess != kPyDirectGamma && |
589380c6 |
401 | fProcess != kPyMbNonDiffr && |
402 | fProcess != kPyW) { |
8d2cd130 |
403 | |
5fa4b20b |
404 | for (i = 0; i < np; i++) { |
2590ccf9 |
405 | TParticle* iparticle = (TParticle *) fParticles->At(i); |
8d2cd130 |
406 | Int_t ks = iparticle->GetStatusCode(); |
407 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
408 | // No initial state partons |
409 | if (ks==21) continue; |
410 | // |
411 | // Heavy Flavor Selection |
412 | // |
413 | // quark ? |
414 | kf = TMath::Abs(kf); |
415 | Int_t kfl = kf; |
9ff6c04c |
416 | // Resonance |
417 | if (kfl > 100000) kfl %= 100000; |
183a5ca9 |
418 | if (kfl > 10000) kfl %= 10000; |
8d2cd130 |
419 | // meson ? |
420 | if (kfl > 10) kfl/=100; |
421 | // baryon |
422 | if (kfl > 10) kfl/=10; |
8d2cd130 |
423 | Int_t ipa = iparticle->GetFirstMother()-1; |
424 | Int_t kfMo = 0; |
425 | |
426 | if (ipa > -1) { |
427 | TParticle * mother = (TParticle *) fParticles->At(ipa); |
428 | kfMo = TMath::Abs(mother->GetPdgCode()); |
429 | } |
430 | // What to keep in Stack? |
431 | Bool_t flavorOK = kFALSE; |
432 | Bool_t selectOK = kFALSE; |
433 | if (fFeedDownOpt) { |
32d6ef7d |
434 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
8d2cd130 |
435 | } else { |
32d6ef7d |
436 | if (kfl > fFlavorSelect) { |
437 | nc = -1; |
438 | break; |
439 | } |
440 | if (kfl == fFlavorSelect) flavorOK = kTRUE; |
8d2cd130 |
441 | } |
442 | switch (fStackFillOpt) { |
443 | case kFlavorSelection: |
32d6ef7d |
444 | selectOK = kTRUE; |
445 | break; |
8d2cd130 |
446 | case kParentSelection: |
32d6ef7d |
447 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
448 | break; |
8d2cd130 |
449 | } |
450 | if (flavorOK && selectOK) { |
451 | // |
452 | // Heavy flavor hadron or quark |
453 | // |
454 | // Kinematic seletion on final state heavy flavor mesons |
455 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) |
456 | { |
9ff6c04c |
457 | continue; |
8d2cd130 |
458 | } |
459 | pSelected[i] = 1; |
460 | if (ParentSelected(kf)) ++nParents; // Update parent count |
461 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
462 | } else { |
463 | // Kinematic seletion on decay products |
464 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) |
9ff6c04c |
465 | && !KinematicSelection(iparticle, 1)) |
8d2cd130 |
466 | { |
9ff6c04c |
467 | continue; |
8d2cd130 |
468 | } |
469 | // |
470 | // Decay products |
471 | // Select if mother was selected and is not tracked |
472 | |
473 | if (pSelected[ipa] && |
474 | !trackIt[ipa] && // mother will be tracked ? |
475 | kfMo != 5 && // mother is b-quark, don't store fragments |
476 | kfMo != 4 && // mother is c-quark, don't store fragments |
477 | kf != 92) // don't store string |
478 | { |
479 | // |
480 | // Semi-stable or de-selected: diselect decay products: |
481 | // |
482 | // |
483 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
484 | { |
485 | Int_t ipF = iparticle->GetFirstDaughter(); |
486 | Int_t ipL = iparticle->GetLastDaughter(); |
487 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; |
488 | } |
489 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); |
490 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; |
491 | } |
492 | } |
493 | if (pSelected[i] == -1) pSelected[i] = 0; |
494 | if (!pSelected[i]) continue; |
495 | // Count quarks only if you did not include fragmentation |
496 | if (fFragmentation && kf <= 10) continue; |
9ff6c04c |
497 | |
8d2cd130 |
498 | nc++; |
499 | // Decision on tracking |
500 | trackIt[i] = 0; |
501 | // |
502 | // Track final state particle |
503 | if (ks == 1) trackIt[i] = 1; |
504 | // Track semi-stable particles |
d25cfd65 |
505 | if ((ks == 1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
8d2cd130 |
506 | // Track particles selected by process if undecayed. |
507 | if (fForceDecay == kNoDecay) { |
508 | if (ParentSelected(kf)) trackIt[i] = 1; |
509 | } else { |
510 | if (ParentSelected(kf)) trackIt[i] = 0; |
511 | } |
512 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
513 | // |
514 | // |
515 | |
516 | } // particle selection loop |
517 | if (nc > 0) { |
518 | for (i = 0; i<np; i++) { |
519 | if (!pSelected[i]) continue; |
520 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
521 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
522 | Int_t ks = iparticle->GetStatusCode(); |
523 | p[0] = iparticle->Px(); |
524 | p[1] = iparticle->Py(); |
525 | p[2] = iparticle->Pz(); |
a920faf9 |
526 | p[3] = iparticle->Energy(); |
527 | |
2590ccf9 |
528 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
529 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
530 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
531 | |
8d2cd130 |
532 | Float_t tof = kconv*iparticle->T(); |
533 | Int_t ipa = iparticle->GetFirstMother()-1; |
534 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a920faf9 |
535 | |
536 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
537 | p[0], p[1], p[2], p[3], |
538 | origin[0], origin[1], origin[2], tof, |
539 | polar[0], polar[1], polar[2], |
540 | kPPrimary, nt, 1., ks); |
8d2cd130 |
541 | pParent[i] = nt; |
542 | KeepTrack(nt); |
642f15cf |
543 | } // PushTrack loop |
8d2cd130 |
544 | } |
545 | } else { |
546 | nc = GenerateMB(); |
547 | } // mb ? |
548 | |
549 | if (pParent) delete[] pParent; |
550 | if (pSelected) delete[] pSelected; |
551 | if (trackIt) delete[] trackIt; |
552 | |
553 | if (nc > 0) { |
554 | switch (fCountMode) { |
555 | case kCountAll: |
556 | // printf(" Count all \n"); |
557 | jev += nc; |
558 | break; |
559 | case kCountParents: |
560 | // printf(" Count parents \n"); |
561 | jev += nParents; |
562 | break; |
563 | case kCountTrackables: |
564 | // printf(" Count trackable \n"); |
565 | jev += nTkbles; |
566 | break; |
567 | } |
568 | if (jev >= fNpart || fNpart == -1) { |
569 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
570 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
571 | |
572 | fQ += fPythia->GetVINT(51); |
573 | fX1 += fPythia->GetVINT(41); |
574 | fX2 += fPythia->GetVINT(42); |
575 | fTrialsRun += fTrials; |
576 | fNev++; |
577 | MakeHeader(); |
578 | break; |
579 | } |
580 | } |
581 | } // event loop |
582 | SetHighWaterMark(nt); |
583 | // adjust weight due to kinematic selection |
b88f5cea |
584 | // AdjustWeights(); |
8d2cd130 |
585 | // get cross-section |
586 | fXsection=fPythia->GetPARI(1); |
587 | } |
588 | |
589 | Int_t AliGenPythia::GenerateMB() |
590 | { |
591 | // |
592 | // Min Bias selection and other global selections |
593 | // |
594 | Int_t i, kf, nt, iparent; |
595 | Int_t nc = 0; |
bf950da8 |
596 | Float_t p[4]; |
8d2cd130 |
597 | Float_t polar[3] = {0,0,0}; |
598 | Float_t origin[3] = {0,0,0}; |
599 | // converts from mm/c to s |
600 | const Float_t kconv=0.001/2.999792458e8; |
601 | |
5fa4b20b |
602 | |
603 | |
604 | Int_t np = (fHadronisation) ? fParticles->GetEntriesFast() : fNpartons; |
605 | |
606 | |
8d2cd130 |
607 | Int_t* pParent = new Int_t[np]; |
608 | for (i=0; i< np; i++) pParent[i] = -1; |
609 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
610 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
611 | TParticle* jet2 = (TParticle *) fParticles->At(7); |
612 | if (!CheckTrigger(jet1, jet2)) return 0; |
613 | } |
614 | |
615 | for (i = 0; i<np; i++) { |
616 | Int_t trackIt = 0; |
617 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
618 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
619 | Int_t ks = iparticle->GetStatusCode(); |
620 | Int_t km = iparticle->GetFirstMother(); |
621 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
622 | (ks != 1) || |
623 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { |
624 | nc++; |
625 | if (ks == 1) trackIt = 1; |
626 | Int_t ipa = iparticle->GetFirstMother()-1; |
627 | |
628 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
629 | |
630 | // |
631 | // store track information |
632 | p[0] = iparticle->Px(); |
633 | p[1] = iparticle->Py(); |
634 | p[2] = iparticle->Pz(); |
a920faf9 |
635 | p[3] = iparticle->Energy(); |
1406f599 |
636 | |
a920faf9 |
637 | |
2590ccf9 |
638 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
639 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
640 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
641 | |
8d2cd130 |
642 | Float_t tof=kconv*iparticle->T(); |
a920faf9 |
643 | |
644 | PushTrack(fTrackIt*trackIt, iparent, kf, |
645 | p[0], p[1], p[2], p[3], |
646 | origin[0], origin[1], origin[2], tof, |
647 | polar[0], polar[1], polar[2], |
648 | kPPrimary, nt, 1., ks); |
5fa4b20b |
649 | // |
650 | // Special Treatment to store color-flow |
651 | // |
652 | if (ks == 3 || ks == 13 || ks == 14) { |
653 | TParticle* particle = 0; |
654 | if (fStack) { |
655 | particle = fStack->Particle(nt); |
656 | } else { |
657 | particle = gAlice->Stack()->Particle(nt); |
658 | } |
659 | particle->SetFirstDaughter(fPythia->GetK(2, i)); |
660 | particle->SetLastDaughter(fPythia->GetK(3, i)); |
661 | } |
662 | |
8d2cd130 |
663 | KeepTrack(nt); |
664 | pParent[i] = nt; |
665 | } // select particle |
666 | } // particle loop |
667 | |
668 | if (pParent) delete[] pParent; |
669 | |
670 | printf("\n I've put %i particles on the stack \n",nc); |
671 | return nc; |
672 | } |
673 | |
674 | |
675 | void AliGenPythia::FinishRun() |
676 | { |
677 | // Print x-section summary |
678 | fPythia->Pystat(1); |
2779fc64 |
679 | |
680 | if (fNev > 0.) { |
681 | fQ /= fNev; |
682 | fX1 /= fNev; |
683 | fX2 /= fNev; |
684 | } |
685 | |
8d2cd130 |
686 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); |
687 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); |
8d2cd130 |
688 | } |
689 | |
690 | void AliGenPythia::AdjustWeights() |
691 | { |
692 | // Adjust the weights after generation of all events |
693 | // |
e2bddf81 |
694 | if (gAlice) { |
695 | TParticle *part; |
696 | Int_t ntrack=gAlice->GetMCApp()->GetNtrack(); |
697 | for (Int_t i=0; i<ntrack; i++) { |
698 | part= gAlice->GetMCApp()->Particle(i); |
699 | part->SetWeight(part->GetWeight()*fKineBias); |
700 | } |
8d2cd130 |
701 | } |
702 | } |
703 | |
704 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) |
705 | { |
706 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
1d568bc2 |
707 | |
1a626d4e |
708 | fAProjectile = a1; |
709 | fATarget = a2; |
1d568bc2 |
710 | fSetNuclei = kTRUE; |
8d2cd130 |
711 | } |
712 | |
713 | |
714 | void AliGenPythia::MakeHeader() |
715 | { |
183a5ca9 |
716 | if (gAlice) { |
717 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
718 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); |
719 | } |
720 | |
8d2cd130 |
721 | // Builds the event header, to be called after each event |
e5c87a3d |
722 | if (fHeader) delete fHeader; |
723 | fHeader = new AliGenPythiaEventHeader("Pythia"); |
8d2cd130 |
724 | // |
725 | // Event type |
e5c87a3d |
726 | ((AliGenPythiaEventHeader*) fHeader)->SetProcessType(fPythia->GetMSTI(1)); |
8d2cd130 |
727 | // |
728 | // Number of trials |
e5c87a3d |
729 | ((AliGenPythiaEventHeader*) fHeader)->SetTrials(fTrials); |
8d2cd130 |
730 | // |
731 | // Event Vertex |
d25cfd65 |
732 | fHeader->SetPrimaryVertex(fVertex); |
8d2cd130 |
733 | // |
734 | // Jets that have triggered |
735 | if (fProcess == kPyJets) |
736 | { |
737 | Int_t ntrig, njet; |
738 | Float_t jets[4][10]; |
739 | GetJets(njet, ntrig, jets); |
9ff6c04c |
740 | |
8d2cd130 |
741 | |
742 | for (Int_t i = 0; i < ntrig; i++) { |
e5c87a3d |
743 | ((AliGenPythiaEventHeader*) fHeader)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
8d2cd130 |
744 | jets[3][i]); |
745 | } |
746 | } |
5fa4b20b |
747 | // |
748 | // Copy relevant information from external header, if present. |
749 | // |
750 | Float_t uqJet[4]; |
751 | |
752 | if (fRL) { |
753 | AliGenPythiaEventHeader* exHeader = (AliGenPythiaEventHeader*) (fRL->GetHeader()->GenEventHeader()); |
754 | for (Int_t i = 0; i < exHeader->NTriggerJets(); i++) |
755 | { |
756 | printf("Adding Jet %d %d \n", i, exHeader->NTriggerJets()); |
757 | |
758 | |
759 | exHeader->TriggerJet(i, uqJet); |
760 | ((AliGenPythiaEventHeader*) fHeader)->AddUQJet(uqJet[0], uqJet[1], uqJet[2], uqJet[3]); |
761 | } |
762 | } |
763 | // |
764 | // Store quenching parameters |
765 | // |
766 | if (fQuench){ |
767 | Double_t z[4]; |
768 | Double_t xp, yp; |
7c21f297 |
769 | if (fQuench == 1) { |
770 | // Pythia::Quench() |
771 | fPythia->GetQuenchingParameters(xp, yp, z); |
772 | } else { |
773 | // Pyquen |
774 | Double_t r1 = PARIMP.rb1; |
775 | Double_t r2 = PARIMP.rb2; |
776 | Double_t b = PARIMP.b1; |
777 | Double_t r = 0.5 * TMath::Sqrt(2. * (r1 * r1 + r2 * r2) - b * b); |
778 | Double_t phi = PARIMP.psib1; |
779 | xp = r * TMath::Cos(phi); |
780 | yp = r * TMath::Sin(phi); |
781 | |
782 | } |
783 | ((AliGenPythiaEventHeader*) fHeader)->SetXYJet(xp, yp); |
784 | ((AliGenPythiaEventHeader*) fHeader)->SetZQuench(z); |
785 | } |
5fa4b20b |
786 | |
787 | // |
788 | // Pass header to RunLoader |
789 | // |
790 | AliRunLoader::GetRunLoader()->GetHeader()->SetGenEventHeader(fHeader); |
8d2cd130 |
791 | } |
792 | |
793 | |
794 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
795 | { |
796 | // Check the kinematic trigger condition |
797 | // |
798 | Double_t eta[2]; |
799 | eta[0] = jet1->Eta(); |
800 | eta[1] = jet2->Eta(); |
801 | Double_t phi[2]; |
802 | phi[0] = jet1->Phi(); |
803 | phi[1] = jet2->Phi(); |
804 | Int_t pdg[2]; |
805 | pdg[0] = jet1->GetPdgCode(); |
806 | pdg[1] = jet2->GetPdgCode(); |
807 | Bool_t triggered = kFALSE; |
808 | |
809 | if (fProcess == kPyJets) { |
810 | Int_t njets = 0; |
811 | Int_t ntrig = 0; |
812 | Float_t jets[4][10]; |
813 | // |
814 | // Use Pythia clustering on parton level to determine jet axis |
815 | // |
816 | GetJets(njets, ntrig, jets); |
817 | |
818 | if (ntrig) triggered = kTRUE; |
819 | // |
820 | } else { |
821 | Int_t ij = 0; |
822 | Int_t ig = 1; |
823 | if (pdg[0] == kGamma) { |
824 | ij = 1; |
825 | ig = 0; |
826 | } |
827 | //Check eta range first... |
828 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && |
829 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) |
830 | { |
831 | //Eta is okay, now check phi range |
832 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && |
833 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) |
834 | { |
835 | triggered = kTRUE; |
836 | } |
837 | } |
838 | } |
839 | return triggered; |
840 | } |
841 | |
842 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
843 | { |
844 | // Assignment operator |
014a9521 |
845 | rhs.Copy(*this); |
8d2cd130 |
846 | return *this; |
847 | } |
848 | |
5fa4b20b |
849 | void AliGenPythia::LoadEvent(AliStack* stack, Int_t flag, Int_t reHadr) |
8d2cd130 |
850 | { |
851 | // |
852 | // Load event into Pythia Common Block |
853 | // |
5fa4b20b |
854 | |
32d6ef7d |
855 | Int_t npart = stack -> GetNprimary(); |
856 | Int_t n0 = 0; |
857 | |
858 | if (!flag) { |
859 | (fPythia->GetPyjets())->N = npart; |
860 | } else { |
861 | n0 = (fPythia->GetPyjets())->N; |
862 | (fPythia->GetPyjets())->N = n0 + npart; |
863 | } |
864 | |
865 | |
8d2cd130 |
866 | for (Int_t part = 0; part < npart; part++) { |
32d6ef7d |
867 | TParticle *MPart = stack->Particle(part); |
868 | |
5fa4b20b |
869 | Int_t kf = MPart->GetPdgCode(); |
870 | Int_t ks = MPart->GetStatusCode(); |
871 | Int_t idf = MPart->GetFirstDaughter(); |
872 | Int_t idl = MPart->GetLastDaughter(); |
873 | |
874 | if (reHadr) { |
875 | if (ks == 11 || ks == 12) { |
876 | ks -= 10; |
877 | idf = -1; |
878 | idl = -1; |
879 | } |
880 | } |
32d6ef7d |
881 | |
8d2cd130 |
882 | Float_t px = MPart->Px(); |
883 | Float_t py = MPart->Py(); |
884 | Float_t pz = MPart->Pz(); |
885 | Float_t e = MPart->Energy(); |
a920faf9 |
886 | Float_t m = MPart->GetCalcMass(); |
8d2cd130 |
887 | |
888 | |
32d6ef7d |
889 | (fPythia->GetPyjets())->P[0][part+n0] = px; |
890 | (fPythia->GetPyjets())->P[1][part+n0] = py; |
891 | (fPythia->GetPyjets())->P[2][part+n0] = pz; |
892 | (fPythia->GetPyjets())->P[3][part+n0] = e; |
893 | (fPythia->GetPyjets())->P[4][part+n0] = m; |
8d2cd130 |
894 | |
32d6ef7d |
895 | (fPythia->GetPyjets())->K[1][part+n0] = kf; |
896 | (fPythia->GetPyjets())->K[0][part+n0] = ks; |
5fa4b20b |
897 | (fPythia->GetPyjets())->K[3][part+n0] = idf + 1; |
898 | (fPythia->GetPyjets())->K[4][part+n0] = idl + 1; |
899 | (fPythia->GetPyjets())->K[2][part+n0] = MPart->GetFirstMother() + 1; |
8d2cd130 |
900 | } |
901 | } |
902 | |
5fa4b20b |
903 | |
014a9521 |
904 | void AliGenPythia::RecJetsUA1(Int_t& njets, Float_t jets [4][50]) |
8d2cd130 |
905 | { |
906 | // |
907 | // Calls the Pythia jet finding algorithm to find jets in the current event |
908 | // |
909 | // |
8d2cd130 |
910 | // |
911 | // Save jets |
912 | Int_t n = fPythia->GetN(); |
913 | |
914 | // |
915 | // Run Jet Finder |
916 | fPythia->Pycell(njets); |
917 | Int_t i; |
918 | for (i = 0; i < njets; i++) { |
919 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
920 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
921 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
922 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
923 | |
924 | jets[0][i] = px; |
925 | jets[1][i] = py; |
926 | jets[2][i] = pz; |
927 | jets[3][i] = e; |
928 | } |
929 | } |
930 | |
931 | |
932 | |
933 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) |
934 | { |
935 | // |
936 | // Calls the Pythia clustering algorithm to find jets in the current event |
937 | // |
938 | Int_t n = fPythia->GetN(); |
939 | nJets = 0; |
940 | nJetsTrig = 0; |
941 | if (fJetReconstruction == kCluster) { |
942 | // |
943 | // Configure cluster algorithm |
944 | // |
945 | fPythia->SetPARU(43, 2.); |
946 | fPythia->SetMSTU(41, 1); |
947 | // |
948 | // Call cluster algorithm |
949 | // |
950 | fPythia->Pyclus(nJets); |
951 | // |
952 | // Loading jets from common block |
953 | // |
954 | } else { |
592f8307 |
955 | |
8d2cd130 |
956 | // |
957 | // Run Jet Finder |
958 | fPythia->Pycell(nJets); |
959 | } |
960 | |
961 | Int_t i; |
962 | for (i = 0; i < nJets; i++) { |
963 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
964 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
965 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
966 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
967 | Float_t pt = TMath::Sqrt(px * px + py * py); |
a920faf9 |
968 | Float_t phi = TMath::Pi() + TMath::ATan2(-py, -px); |
8d2cd130 |
969 | Float_t theta = TMath::ATan2(pt,pz); |
970 | Float_t et = e * TMath::Sin(theta); |
971 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); |
8d2cd130 |
972 | if ( |
973 | eta > fEtaMinJet && eta < fEtaMaxJet && |
675eb105 |
974 | phi > fPhiMinJet && phi < fPhiMaxJet && |
8d2cd130 |
975 | et > fEtMinJet && et < fEtMaxJet |
976 | ) |
977 | { |
978 | jets[0][nJetsTrig] = px; |
979 | jets[1][nJetsTrig] = py; |
980 | jets[2][nJetsTrig] = pz; |
981 | jets[3][nJetsTrig] = e; |
982 | nJetsTrig++; |
5fa4b20b |
983 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
8d2cd130 |
984 | } else { |
985 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
986 | } |
987 | } |
988 | } |
989 | |
990 | |
991 | #ifdef never |
992 | void AliGenPythia::Streamer(TBuffer &R__b) |
993 | { |
994 | // Stream an object of class AliGenPythia. |
995 | |
996 | if (R__b.IsReading()) { |
997 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } |
998 | AliGenerator::Streamer(R__b); |
999 | R__b >> (Int_t&)fProcess; |
1000 | R__b >> (Int_t&)fStrucFunc; |
1001 | R__b >> (Int_t&)fForceDecay; |
1002 | R__b >> fEnergyCMS; |
1003 | R__b >> fKineBias; |
1004 | R__b >> fTrials; |
1005 | fParentSelect.Streamer(R__b); |
1006 | fChildSelect.Streamer(R__b); |
1007 | R__b >> fXsection; |
1008 | // (AliPythia::Instance())->Streamer(R__b); |
1009 | R__b >> fPtHardMin; |
1010 | R__b >> fPtHardMax; |
1011 | // if (fDecayer) fDecayer->Streamer(R__b); |
1012 | } else { |
1013 | R__b.WriteVersion(AliGenPythia::IsA()); |
1014 | AliGenerator::Streamer(R__b); |
1015 | R__b << (Int_t)fProcess; |
1016 | R__b << (Int_t)fStrucFunc; |
1017 | R__b << (Int_t)fForceDecay; |
1018 | R__b << fEnergyCMS; |
1019 | R__b << fKineBias; |
1020 | R__b << fTrials; |
1021 | fParentSelect.Streamer(R__b); |
1022 | fChildSelect.Streamer(R__b); |
1023 | R__b << fXsection; |
1024 | // R__b << fPythia; |
1025 | R__b << fPtHardMin; |
1026 | R__b << fPtHardMax; |
1027 | // fDecayer->Streamer(R__b); |
1028 | } |
1029 | } |
1030 | #endif |
1031 | |
90d7b703 |
1032 | |
589380c6 |
1033 | |