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