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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) { | |
1406f599 | 291 | fPythia->InitQuenching(0., 0.05, 1.45, 8., 1); |
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 | // | |
7ea3ea5b | 334 | fPythia->Quench(); |
1406f599 | 335 | // fPythia->Pylist(1); |
32d6ef7d | 336 | // |
337 | // Switch fragmentation on | |
7ea3ea5b | 338 | fPythia->SetMSTJ(1, 1); |
32d6ef7d | 339 | // |
340 | // .. and perform fragmentation | |
7ea3ea5b | 341 | fPythia->Pyexec(); |
1406f599 | 342 | // fPythia->Pylist(1); |
32d6ef7d | 343 | |
7ea3ea5b | 344 | } |
345 | ||
e2bddf81 | 346 | if (gAlice) { |
347 | if (gAlice->GetEvNumber()>=fDebugEventFirst && | |
348 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
349 | } | |
7ea3ea5b | 350 | |
8d2cd130 | 351 | fTrials++; |
8d2cd130 | 352 | fPythia->ImportParticles(fParticles,"All"); |
1d568bc2 | 353 | Boost(); |
8d2cd130 | 354 | // |
355 | // | |
356 | // | |
357 | Int_t i; | |
358 | ||
359 | Int_t np = fParticles->GetEntriesFast(); | |
360 | if (np == 0 ) continue; | |
8d2cd130 | 361 | // |
2590ccf9 | 362 | |
8d2cd130 | 363 | // |
364 | Int_t* pParent = new Int_t[np]; | |
365 | Int_t* pSelected = new Int_t[np]; | |
366 | Int_t* trackIt = new Int_t[np]; | |
367 | for (i=0; i< np; i++) { | |
368 | pParent[i] = -1; | |
369 | pSelected[i] = 0; | |
370 | trackIt[i] = 0; | |
371 | } | |
372 | ||
373 | Int_t nc = 0; // Total n. of selected particles | |
374 | Int_t nParents = 0; // Selected parents | |
375 | Int_t nTkbles = 0; // Trackable particles | |
376 | if (fProcess != kPyMb && fProcess != kPyJets && | |
377 | fProcess != kPyDirectGamma && | |
378 | fProcess != kPyMbNonDiffr) { | |
379 | ||
380 | for (i = 0; i<np; i++) { | |
2590ccf9 | 381 | TParticle* iparticle = (TParticle *) fParticles->At(i); |
8d2cd130 | 382 | Int_t ks = iparticle->GetStatusCode(); |
383 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
384 | // No initial state partons | |
385 | if (ks==21) continue; | |
386 | // | |
387 | // Heavy Flavor Selection | |
388 | // | |
389 | // quark ? | |
390 | kf = TMath::Abs(kf); | |
391 | Int_t kfl = kf; | |
392 | // meson ? | |
393 | if (kfl > 10) kfl/=100; | |
394 | // baryon | |
395 | if (kfl > 10) kfl/=10; | |
396 | if (kfl > 10) kfl/=10; | |
397 | ||
398 | Int_t ipa = iparticle->GetFirstMother()-1; | |
399 | Int_t kfMo = 0; | |
400 | ||
401 | if (ipa > -1) { | |
402 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
403 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
404 | } | |
405 | // What to keep in Stack? | |
406 | Bool_t flavorOK = kFALSE; | |
407 | Bool_t selectOK = kFALSE; | |
408 | if (fFeedDownOpt) { | |
32d6ef7d | 409 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
8d2cd130 | 410 | } else { |
32d6ef7d | 411 | if (kfl > fFlavorSelect) { |
412 | nc = -1; | |
413 | break; | |
414 | } | |
415 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
8d2cd130 | 416 | } |
417 | switch (fStackFillOpt) { | |
418 | case kFlavorSelection: | |
32d6ef7d | 419 | selectOK = kTRUE; |
420 | break; | |
8d2cd130 | 421 | case kParentSelection: |
32d6ef7d | 422 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
423 | break; | |
8d2cd130 | 424 | } |
425 | if (flavorOK && selectOK) { | |
426 | // | |
427 | // Heavy flavor hadron or quark | |
428 | // | |
429 | // Kinematic seletion on final state heavy flavor mesons | |
430 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
431 | { | |
432 | continue; | |
433 | } | |
434 | pSelected[i] = 1; | |
435 | if (ParentSelected(kf)) ++nParents; // Update parent count | |
436 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); | |
437 | } else { | |
438 | // Kinematic seletion on decay products | |
439 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
440 | && !KinematicSelection(iparticle, 1)) | |
441 | { | |
442 | continue; | |
443 | } | |
444 | // | |
445 | // Decay products | |
446 | // Select if mother was selected and is not tracked | |
447 | ||
448 | if (pSelected[ipa] && | |
449 | !trackIt[ipa] && // mother will be tracked ? | |
450 | kfMo != 5 && // mother is b-quark, don't store fragments | |
451 | kfMo != 4 && // mother is c-quark, don't store fragments | |
452 | kf != 92) // don't store string | |
453 | { | |
454 | // | |
455 | // Semi-stable or de-selected: diselect decay products: | |
456 | // | |
457 | // | |
458 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) | |
459 | { | |
460 | Int_t ipF = iparticle->GetFirstDaughter(); | |
461 | Int_t ipL = iparticle->GetLastDaughter(); | |
462 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
463 | } | |
464 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
465 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
466 | } | |
467 | } | |
468 | if (pSelected[i] == -1) pSelected[i] = 0; | |
469 | if (!pSelected[i]) continue; | |
470 | // Count quarks only if you did not include fragmentation | |
471 | if (fFragmentation && kf <= 10) continue; | |
472 | nc++; | |
473 | // Decision on tracking | |
474 | trackIt[i] = 0; | |
475 | // | |
476 | // Track final state particle | |
477 | if (ks == 1) trackIt[i] = 1; | |
478 | // Track semi-stable particles | |
d25cfd65 | 479 | if ((ks == 1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
8d2cd130 | 480 | // Track particles selected by process if undecayed. |
481 | if (fForceDecay == kNoDecay) { | |
482 | if (ParentSelected(kf)) trackIt[i] = 1; | |
483 | } else { | |
484 | if (ParentSelected(kf)) trackIt[i] = 0; | |
485 | } | |
486 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter | |
487 | // | |
488 | // | |
489 | ||
490 | } // particle selection loop | |
491 | if (nc > 0) { | |
492 | for (i = 0; i<np; i++) { | |
493 | if (!pSelected[i]) continue; | |
494 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
495 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
496 | Int_t ks = iparticle->GetStatusCode(); | |
497 | p[0] = iparticle->Px(); | |
498 | p[1] = iparticle->Py(); | |
499 | p[2] = iparticle->Pz(); | |
a920faf9 | 500 | p[3] = iparticle->Energy(); |
501 | ||
2590ccf9 | 502 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
503 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] | |
504 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] | |
505 | ||
8d2cd130 | 506 | Float_t tof = kconv*iparticle->T(); |
507 | Int_t ipa = iparticle->GetFirstMother()-1; | |
508 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; | |
a920faf9 | 509 | |
510 | PushTrack(fTrackIt*trackIt[i], iparent, kf, | |
511 | p[0], p[1], p[2], p[3], | |
512 | origin[0], origin[1], origin[2], tof, | |
513 | polar[0], polar[1], polar[2], | |
514 | kPPrimary, nt, 1., ks); | |
8d2cd130 | 515 | pParent[i] = nt; |
516 | KeepTrack(nt); | |
642f15cf | 517 | } // PushTrack loop |
8d2cd130 | 518 | } |
519 | } else { | |
520 | nc = GenerateMB(); | |
521 | } // mb ? | |
522 | ||
523 | if (pParent) delete[] pParent; | |
524 | if (pSelected) delete[] pSelected; | |
525 | if (trackIt) delete[] trackIt; | |
526 | ||
527 | if (nc > 0) { | |
528 | switch (fCountMode) { | |
529 | case kCountAll: | |
530 | // printf(" Count all \n"); | |
531 | jev += nc; | |
532 | break; | |
533 | case kCountParents: | |
534 | // printf(" Count parents \n"); | |
535 | jev += nParents; | |
536 | break; | |
537 | case kCountTrackables: | |
538 | // printf(" Count trackable \n"); | |
539 | jev += nTkbles; | |
540 | break; | |
541 | } | |
542 | if (jev >= fNpart || fNpart == -1) { | |
543 | fKineBias=Float_t(fNpart)/Float_t(fTrials); | |
544 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); | |
545 | ||
546 | fQ += fPythia->GetVINT(51); | |
547 | fX1 += fPythia->GetVINT(41); | |
548 | fX2 += fPythia->GetVINT(42); | |
549 | fTrialsRun += fTrials; | |
550 | fNev++; | |
551 | MakeHeader(); | |
552 | break; | |
553 | } | |
554 | } | |
555 | } // event loop | |
556 | SetHighWaterMark(nt); | |
557 | // adjust weight due to kinematic selection | |
b88f5cea | 558 | // AdjustWeights(); |
8d2cd130 | 559 | // get cross-section |
560 | fXsection=fPythia->GetPARI(1); | |
561 | } | |
562 | ||
563 | Int_t AliGenPythia::GenerateMB() | |
564 | { | |
565 | // | |
566 | // Min Bias selection and other global selections | |
567 | // | |
568 | Int_t i, kf, nt, iparent; | |
569 | Int_t nc = 0; | |
bf950da8 | 570 | Float_t p[4]; |
8d2cd130 | 571 | Float_t polar[3] = {0,0,0}; |
572 | Float_t origin[3] = {0,0,0}; | |
573 | // converts from mm/c to s | |
574 | const Float_t kconv=0.001/2.999792458e8; | |
575 | ||
576 | Int_t np = fParticles->GetEntriesFast(); | |
577 | Int_t* pParent = new Int_t[np]; | |
578 | for (i=0; i< np; i++) pParent[i] = -1; | |
579 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { | |
580 | TParticle* jet1 = (TParticle *) fParticles->At(6); | |
581 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
582 | if (!CheckTrigger(jet1, jet2)) return 0; | |
583 | } | |
584 | ||
585 | for (i = 0; i<np; i++) { | |
586 | Int_t trackIt = 0; | |
587 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
588 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
589 | Int_t ks = iparticle->GetStatusCode(); | |
590 | Int_t km = iparticle->GetFirstMother(); | |
591 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || | |
592 | (ks != 1) || | |
593 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
594 | nc++; | |
595 | if (ks == 1) trackIt = 1; | |
596 | Int_t ipa = iparticle->GetFirstMother()-1; | |
597 | ||
598 | iparent = (ipa > -1) ? pParent[ipa] : -1; | |
599 | ||
600 | // | |
601 | // store track information | |
602 | p[0] = iparticle->Px(); | |
603 | p[1] = iparticle->Py(); | |
604 | p[2] = iparticle->Pz(); | |
a920faf9 | 605 | p[3] = iparticle->Energy(); |
1406f599 | 606 | |
a920faf9 | 607 | |
2590ccf9 | 608 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
609 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] | |
610 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] | |
611 | ||
8d2cd130 | 612 | Float_t tof=kconv*iparticle->T(); |
a920faf9 | 613 | |
614 | PushTrack(fTrackIt*trackIt, iparent, kf, | |
615 | p[0], p[1], p[2], p[3], | |
616 | origin[0], origin[1], origin[2], tof, | |
617 | polar[0], polar[1], polar[2], | |
618 | kPPrimary, nt, 1., ks); | |
8d2cd130 | 619 | KeepTrack(nt); |
620 | pParent[i] = nt; | |
621 | } // select particle | |
622 | } // particle loop | |
623 | ||
624 | if (pParent) delete[] pParent; | |
625 | ||
626 | printf("\n I've put %i particles on the stack \n",nc); | |
627 | return nc; | |
628 | } | |
629 | ||
630 | ||
631 | void AliGenPythia::FinishRun() | |
632 | { | |
633 | // Print x-section summary | |
634 | fPythia->Pystat(1); | |
635 | fQ /= fNev; | |
636 | fX1 /= fNev; | |
637 | fX2 /= fNev; | |
638 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); | |
639 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); | |
640 | ||
641 | ||
642 | } | |
643 | ||
644 | void AliGenPythia::AdjustWeights() | |
645 | { | |
646 | // Adjust the weights after generation of all events | |
647 | // | |
e2bddf81 | 648 | if (gAlice) { |
649 | TParticle *part; | |
650 | Int_t ntrack=gAlice->GetMCApp()->GetNtrack(); | |
651 | for (Int_t i=0; i<ntrack; i++) { | |
652 | part= gAlice->GetMCApp()->Particle(i); | |
653 | part->SetWeight(part->GetWeight()*fKineBias); | |
654 | } | |
8d2cd130 | 655 | } |
656 | } | |
657 | ||
658 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
659 | { | |
660 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
1d568bc2 | 661 | |
1a626d4e | 662 | fAProjectile = a1; |
663 | fATarget = a2; | |
1d568bc2 | 664 | fSetNuclei = kTRUE; |
8d2cd130 | 665 | } |
666 | ||
667 | ||
668 | void AliGenPythia::MakeHeader() | |
669 | { | |
670 | // Builds the event header, to be called after each event | |
e5c87a3d | 671 | if (fHeader) delete fHeader; |
672 | fHeader = new AliGenPythiaEventHeader("Pythia"); | |
8d2cd130 | 673 | // |
674 | // Event type | |
e5c87a3d | 675 | ((AliGenPythiaEventHeader*) fHeader)->SetProcessType(fPythia->GetMSTI(1)); |
8d2cd130 | 676 | // |
677 | // Number of trials | |
e5c87a3d | 678 | ((AliGenPythiaEventHeader*) fHeader)->SetTrials(fTrials); |
8d2cd130 | 679 | // |
680 | // Event Vertex | |
d25cfd65 | 681 | fHeader->SetPrimaryVertex(fVertex); |
8d2cd130 | 682 | // |
683 | // Jets that have triggered | |
684 | if (fProcess == kPyJets) | |
685 | { | |
686 | Int_t ntrig, njet; | |
687 | Float_t jets[4][10]; | |
688 | GetJets(njet, ntrig, jets); | |
689 | ||
690 | for (Int_t i = 0; i < ntrig; i++) { | |
e5c87a3d | 691 | ((AliGenPythiaEventHeader*) fHeader)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
8d2cd130 | 692 | jets[3][i]); |
693 | } | |
694 | } | |
e2bddf81 | 695 | if (gAlice) gAlice->SetGenEventHeader(fHeader); |
8d2cd130 | 696 | } |
697 | ||
698 | ||
699 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) | |
700 | { | |
701 | // Check the kinematic trigger condition | |
702 | // | |
703 | Double_t eta[2]; | |
704 | eta[0] = jet1->Eta(); | |
705 | eta[1] = jet2->Eta(); | |
706 | Double_t phi[2]; | |
707 | phi[0] = jet1->Phi(); | |
708 | phi[1] = jet2->Phi(); | |
709 | Int_t pdg[2]; | |
710 | pdg[0] = jet1->GetPdgCode(); | |
711 | pdg[1] = jet2->GetPdgCode(); | |
712 | Bool_t triggered = kFALSE; | |
713 | ||
714 | if (fProcess == kPyJets) { | |
715 | Int_t njets = 0; | |
716 | Int_t ntrig = 0; | |
717 | Float_t jets[4][10]; | |
718 | // | |
719 | // Use Pythia clustering on parton level to determine jet axis | |
720 | // | |
721 | GetJets(njets, ntrig, jets); | |
722 | ||
723 | if (ntrig) triggered = kTRUE; | |
724 | // | |
725 | } else { | |
726 | Int_t ij = 0; | |
727 | Int_t ig = 1; | |
728 | if (pdg[0] == kGamma) { | |
729 | ij = 1; | |
730 | ig = 0; | |
731 | } | |
732 | //Check eta range first... | |
733 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
734 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
735 | { | |
736 | //Eta is okay, now check phi range | |
737 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
738 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
739 | { | |
740 | triggered = kTRUE; | |
741 | } | |
742 | } | |
743 | } | |
744 | return triggered; | |
745 | } | |
746 | ||
747 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) | |
748 | { | |
749 | // Assignment operator | |
014a9521 | 750 | rhs.Copy(*this); |
8d2cd130 | 751 | return *this; |
752 | } | |
753 | ||
32d6ef7d | 754 | void AliGenPythia::LoadEvent(AliStack* stack, Int_t flag) |
8d2cd130 | 755 | { |
756 | // | |
757 | // Load event into Pythia Common Block | |
758 | // | |
759 | ||
32d6ef7d | 760 | // AliRunLoader* rl = AliRunLoader::GetRunLoader(); |
761 | Int_t npart = stack -> GetNprimary(); | |
762 | Int_t n0 = 0; | |
763 | ||
764 | if (!flag) { | |
765 | (fPythia->GetPyjets())->N = npart; | |
766 | } else { | |
767 | n0 = (fPythia->GetPyjets())->N; | |
768 | (fPythia->GetPyjets())->N = n0 + npart; | |
769 | } | |
770 | ||
771 | ||
8d2cd130 | 772 | for (Int_t part = 0; part < npart; part++) { |
32d6ef7d | 773 | TParticle *MPart = stack->Particle(part); |
774 | ||
8d2cd130 | 775 | Int_t kf = MPart->GetPdgCode(); |
776 | Int_t ks = MPart->GetStatusCode(); | |
32d6ef7d | 777 | |
8d2cd130 | 778 | Float_t px = MPart->Px(); |
779 | Float_t py = MPart->Py(); | |
780 | Float_t pz = MPart->Pz(); | |
781 | Float_t e = MPart->Energy(); | |
a920faf9 | 782 | Float_t m = MPart->GetCalcMass(); |
8d2cd130 | 783 | |
784 | ||
32d6ef7d | 785 | (fPythia->GetPyjets())->P[0][part+n0] = px; |
786 | (fPythia->GetPyjets())->P[1][part+n0] = py; | |
787 | (fPythia->GetPyjets())->P[2][part+n0] = pz; | |
788 | (fPythia->GetPyjets())->P[3][part+n0] = e; | |
789 | (fPythia->GetPyjets())->P[4][part+n0] = m; | |
8d2cd130 | 790 | |
32d6ef7d | 791 | (fPythia->GetPyjets())->K[1][part+n0] = kf; |
792 | (fPythia->GetPyjets())->K[0][part+n0] = ks; | |
8d2cd130 | 793 | } |
794 | } | |
795 | ||
014a9521 | 796 | void AliGenPythia::RecJetsUA1(Int_t& njets, Float_t jets [4][50]) |
8d2cd130 | 797 | { |
798 | // | |
799 | // Calls the Pythia jet finding algorithm to find jets in the current event | |
800 | // | |
801 | // | |
8d2cd130 | 802 | // |
803 | // Save jets | |
804 | Int_t n = fPythia->GetN(); | |
805 | ||
806 | // | |
807 | // Run Jet Finder | |
808 | fPythia->Pycell(njets); | |
809 | Int_t i; | |
810 | for (i = 0; i < njets; i++) { | |
811 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; | |
812 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; | |
813 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; | |
814 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; | |
815 | ||
816 | jets[0][i] = px; | |
817 | jets[1][i] = py; | |
818 | jets[2][i] = pz; | |
819 | jets[3][i] = e; | |
820 | } | |
821 | } | |
822 | ||
823 | ||
824 | ||
825 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) | |
826 | { | |
827 | // | |
828 | // Calls the Pythia clustering algorithm to find jets in the current event | |
829 | // | |
830 | Int_t n = fPythia->GetN(); | |
831 | nJets = 0; | |
832 | nJetsTrig = 0; | |
833 | if (fJetReconstruction == kCluster) { | |
834 | // | |
835 | // Configure cluster algorithm | |
836 | // | |
837 | fPythia->SetPARU(43, 2.); | |
838 | fPythia->SetMSTU(41, 1); | |
839 | // | |
840 | // Call cluster algorithm | |
841 | // | |
842 | fPythia->Pyclus(nJets); | |
843 | // | |
844 | // Loading jets from common block | |
845 | // | |
846 | } else { | |
592f8307 | 847 | |
8d2cd130 | 848 | // |
849 | // Run Jet Finder | |
850 | fPythia->Pycell(nJets); | |
851 | } | |
852 | ||
853 | Int_t i; | |
854 | for (i = 0; i < nJets; i++) { | |
855 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; | |
856 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; | |
857 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; | |
858 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; | |
859 | Float_t pt = TMath::Sqrt(px * px + py * py); | |
a920faf9 | 860 | Float_t phi = TMath::Pi() + TMath::ATan2(-py, -px); |
8d2cd130 | 861 | Float_t theta = TMath::ATan2(pt,pz); |
862 | Float_t et = e * TMath::Sin(theta); | |
863 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); | |
864 | ||
865 | if ( | |
866 | eta > fEtaMinJet && eta < fEtaMaxJet && | |
675eb105 | 867 | phi > fPhiMinJet && phi < fPhiMaxJet && |
8d2cd130 | 868 | et > fEtMinJet && et < fEtMaxJet |
869 | ) | |
870 | { | |
871 | jets[0][nJetsTrig] = px; | |
872 | jets[1][nJetsTrig] = py; | |
873 | jets[2][nJetsTrig] = pz; | |
874 | jets[3][nJetsTrig] = e; | |
875 | nJetsTrig++; | |
876 | ||
877 | } else { | |
878 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); | |
879 | } | |
880 | } | |
881 | } | |
882 | ||
883 | ||
884 | #ifdef never | |
885 | void AliGenPythia::Streamer(TBuffer &R__b) | |
886 | { | |
887 | // Stream an object of class AliGenPythia. | |
888 | ||
889 | if (R__b.IsReading()) { | |
890 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
891 | AliGenerator::Streamer(R__b); | |
892 | R__b >> (Int_t&)fProcess; | |
893 | R__b >> (Int_t&)fStrucFunc; | |
894 | R__b >> (Int_t&)fForceDecay; | |
895 | R__b >> fEnergyCMS; | |
896 | R__b >> fKineBias; | |
897 | R__b >> fTrials; | |
898 | fParentSelect.Streamer(R__b); | |
899 | fChildSelect.Streamer(R__b); | |
900 | R__b >> fXsection; | |
901 | // (AliPythia::Instance())->Streamer(R__b); | |
902 | R__b >> fPtHardMin; | |
903 | R__b >> fPtHardMax; | |
904 | // if (fDecayer) fDecayer->Streamer(R__b); | |
905 | } else { | |
906 | R__b.WriteVersion(AliGenPythia::IsA()); | |
907 | AliGenerator::Streamer(R__b); | |
908 | R__b << (Int_t)fProcess; | |
909 | R__b << (Int_t)fStrucFunc; | |
910 | R__b << (Int_t)fForceDecay; | |
911 | R__b << fEnergyCMS; | |
912 | R__b << fKineBias; | |
913 | R__b << fTrials; | |
914 | fParentSelect.Streamer(R__b); | |
915 | fChildSelect.Streamer(R__b); | |
916 | R__b << fXsection; | |
917 | // R__b << fPythia; | |
918 | R__b << fPtHardMin; | |
919 | R__b << fPtHardMax; | |
920 | // fDecayer->Streamer(R__b); | |
921 | } | |
922 | } | |
923 | #endif | |
924 | ||
90d7b703 | 925 |