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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // | |
20 | // AliGenAfterBurnerFlow is a After Burner event generator applying flow. | |
21 | // The generator changes Phi coordinate of the particle momentum. | |
22 | // Flow (directed and elliptical) can be defined on particle type level | |
23 | // | |
24 | // Author: | |
25 | // Sylwester Radomski, 2002 | |
26 | // Martin Poghosyan, 2008 | |
27 | // Constantin Loizides, 2010 | |
28 | ////////////////////////////////////////////////////////////////////////////// | |
29 | ||
30 | #include <Riostream.h> | |
31 | #include <TParticle.h> | |
32 | #include <TLorentzVector.h> | |
33 | #include <TList.h> | |
34 | #include <TRandom.h> | |
35 | #include "AliStack.h" | |
36 | #include "AliGenAfterBurnerFlow.h" | |
37 | #include "AliGenCocktailAfterBurner.h" | |
38 | #include "AliMC.h" | |
39 | #include "AliCollisionGeometry.h" | |
40 | #include "AliGenCocktailEntry.h" | |
41 | ||
42 | ||
43 | ClassImp(AliGenAfterBurnerFlow) | |
44 | ||
45 | ||
46 | AliGenAfterBurnerFlow::AliGenAfterBurnerFlow():AliGenerator(), | |
47 | fReactionPlane(0), | |
48 | fHow(0), | |
49 | fCounter(0), | |
50 | fStack(0) | |
51 | { | |
52 | // | |
53 | // Default Construction | |
54 | InitPrimaries(); | |
55 | SetNpParams(); | |
56 | } | |
57 | ||
58 | AliGenAfterBurnerFlow::AliGenAfterBurnerFlow(Float_t reactionPlane):AliGenerator(), | |
59 | fReactionPlane(TMath::Pi()*reactionPlane/180.), | |
60 | fHow(1), | |
61 | fCounter(0), | |
62 | fStack(0) | |
63 | { | |
64 | // reactionPlane - Reaction Plane Angle given in Deg [0-360] | |
65 | // but stored and applied in radiants (standard for TParticle & AliCollisionGeometry) | |
66 | ||
67 | InitPrimaries(); | |
68 | SetNpParams(); | |
69 | } | |
70 | ||
71 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
72 | ||
73 | AliGenAfterBurnerFlow::~AliGenAfterBurnerFlow() | |
74 | { | |
75 | // def. dest. | |
76 | } | |
77 | ||
78 | void AliGenAfterBurnerFlow::SetDirectedSimple(Int_t pdg, Float_t v1) | |
79 | { | |
80 | // | |
81 | // Set Directed Flow | |
82 | // The same directed flow is applied to all specified particles | |
83 | // independently on transverse momentum or rapidity | |
84 | // | |
85 | // PDG - particle type to apply directed flow | |
86 | // if (PDG == 0) use as default | |
87 | // | |
88 | ||
89 | SetFlowParameters(pdg, 1, 0, v1, 0, 0, 0); | |
90 | } | |
91 | ||
92 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
93 | ||
94 | void AliGenAfterBurnerFlow::SetDirectedParam(Int_t pdg, Float_t v11, Float_t v12, | |
95 | Float_t v13, Float_t v14) | |
96 | { | |
97 | // | |
98 | // Set Directed Flow | |
99 | // Directed flow is parameterised as follows | |
100 | // | |
101 | // V1(Pt,Y) = (V11 + V12*Pt) * sign(Y) * (V13 + V14 * abs(Y)^3) | |
102 | // | |
103 | // where sign = 1 for Y > 0 and -1 for Y < 0 | |
104 | // | |
105 | // Defaults values | |
106 | // v12 = v14 = 0 | |
107 | // v13 = 1 | |
108 | // | |
109 | // PDG - particle type to apply directed flow | |
110 | // if (PDG == 0) use as default | |
111 | // | |
112 | ||
113 | SetFlowParameters(pdg, 1, 1, v11, v12, v13, v14); | |
114 | } | |
115 | ||
116 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
117 | ||
118 | void AliGenAfterBurnerFlow::SetEllipticSimple(Int_t pdg, Float_t v2) | |
119 | { | |
120 | // | |
121 | // Set Elliptic Flow | |
122 | // The same Elliptic flow is applied to all specified particles | |
123 | // independently on transverse momentum or rapidity | |
124 | // | |
125 | // PDG - particle type to apply directed flow | |
126 | // if (PDG == 0) use as default | |
127 | // | |
128 | // V2 - flow coefficient | |
129 | // | |
130 | // NOTE: for starting playing with FLOW | |
131 | // start with this function and values 0.05 - 0.1 | |
132 | // | |
133 | ||
134 | SetFlowParameters(pdg, 2, 0, v2, 0, 0, 0); | |
135 | } | |
136 | ||
137 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
138 | ||
139 | void AliGenAfterBurnerFlow::SetEllipticParam(Int_t pdg, | |
140 | Float_t v00, Float_t v10, Float_t v11, | |
141 | Float_t v22) | |
142 | { | |
143 | // | |
144 | // Set Elliptic Flow | |
145 | // | |
146 | // Elliptic flow is parametrised to reproduce | |
147 | // V2 of Pions at RHIC energies and is given by: | |
148 | // | |
149 | // V2 = (v00 + v10*pt + v11*pt^2) * exp (-v22 * y^2) and zero if V2<0. | |
150 | // | |
151 | ||
152 | SetFlowParameters(pdg, 2, 3, v00, v10, v11, v22); | |
153 | } | |
154 | ||
155 | void AliGenAfterBurnerFlow::SetEllipticParamPion(Int_t pdg, Float_t v21, | |
156 | Float_t pTmax, Float_t v22) | |
157 | { | |
158 | // | |
159 | // Set Elliptic Flow | |
160 | // | |
161 | // Elliptic flow is parametrised to reproduce | |
162 | // V2 of Pions at RHIC energies and is given by: | |
163 | // | |
164 | // V2 = v21 * (pT/pTMax ) * exp (-v22 * y^2) where pT <= pTmax | |
165 | // v21 * exp (-v22 * y^2) where pT > pTmax | |
166 | // | |
167 | // v21 - value at saturation | |
168 | // pTmax - saturation transverse momentum | |
169 | // v22 - rapidity decreasing | |
170 | // | |
171 | ||
172 | SetFlowParameters(pdg, 2, 1, v21, pTmax, v22, 0); | |
173 | } | |
174 | ||
175 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
176 | ||
177 | void AliGenAfterBurnerFlow::SetEllipticParamOld(Int_t pdg, Float_t v21, Float_t v22, Float_t v23) | |
178 | { | |
179 | // | |
180 | // Set Elliptic Flow | |
181 | // | |
182 | // Elliptic flow is parameterised using | |
183 | // old MevSim parameterisation | |
184 | // | |
185 | // V2 = (V21 + V22 pT^2) * exp (-v22 * y^2) | |
186 | // | |
187 | ||
188 | SetFlowParameters(pdg, 2, 2, v21, v22, v23, 0); | |
189 | } | |
190 | ||
191 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
192 | ||
193 | void AliGenAfterBurnerFlow::SetNpParams(Int_t order, Float_t p0, Float_t p1, Float_t p2, Float_t p3) | |
194 | { | |
195 | // | |
196 | // Set npart parameterization. | |
197 | // | |
198 | ||
199 | fNpParams[0] = order; | |
200 | fNpParams[1] = p0; | |
201 | fNpParams[2] = p1; | |
202 | fNpParams[3] = p2; | |
203 | fNpParams[4] = p3; | |
204 | } | |
205 | ||
206 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
207 | ||
208 | void AliGenAfterBurnerFlow::SetFlowParameters(Int_t pdg, Int_t order, Int_t type, | |
209 | Float_t v1, Float_t v2,Float_t v3,Float_t v4) | |
210 | { | |
211 | // | |
212 | // private function | |
213 | // | |
214 | ||
215 | if(TMath::Abs(pdg)>=fgkPDG){ | |
216 | Error("AliAfterBurnerFlow","Overflow"); | |
217 | return; | |
218 | } | |
219 | fIsPrim[TMath::Abs(pdg)]=kTRUE; | |
220 | ||
221 | Int_t index = 0; | |
222 | Bool_t newEntry = kTRUE; | |
223 | ||
224 | // Defaults | |
225 | if (pdg == 0) { | |
226 | index = fgkN - order; | |
227 | newEntry = kFALSE; | |
228 | } | |
229 | ||
230 | // try to find existing entry | |
231 | for (Int_t i=0; i<fCounter; i++) { | |
232 | if (pdg == (Int_t)fParams[i][0] && | |
233 | order == (Int_t)fParams[i][1]) { | |
234 | ||
235 | index = i; | |
236 | newEntry = kFALSE; | |
237 | } | |
238 | } | |
239 | ||
240 | // check fCounter | |
241 | ||
242 | if (newEntry && (fCounter > fgkN-3)) { | |
243 | Error("AliAfterBurnerFlow","Overflow"); | |
244 | return; | |
245 | } | |
246 | ||
247 | if (newEntry) { | |
248 | index = fCounter; | |
249 | fCounter++; | |
250 | } | |
251 | ||
252 | // Set new particle type | |
253 | ||
254 | fParams[index][0] = pdg; | |
255 | fParams[index][1] = order; | |
256 | fParams[index][2] = type; | |
257 | fParams[index][3] = v1; | |
258 | fParams[index][4] = v2; | |
259 | fParams[index][5] = v3; | |
260 | fParams[index][6] = v4; | |
261 | } | |
262 | ||
263 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
264 | ||
265 | void AliGenAfterBurnerFlow::Init() | |
266 | { | |
267 | // | |
268 | // Standard AliGenerator Initializer | |
269 | // | |
270 | ||
271 | if(fHow == 0) { Info("AliGenAfterBurnerFlow", "Using the Hijing R.P. Angle event by event "); } | |
272 | else if(fHow == 1){ Info("AliGenAfterBurnerFlow", "Using a fixed R.P. Angle for every event ") ; } | |
273 | else { Info("AliGenAfterBurnerFlow", | |
274 | "Using a random R.P. Angle event by event ( ! not the same used by Hijing ! ) "); } | |
275 | } | |
276 | ||
277 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
278 | ||
279 | Float_t AliGenAfterBurnerFlow::GetCoefficient(Int_t pdg, Int_t n, Float_t Pt, Float_t Y) const | |
280 | { | |
281 | // | |
282 | // private function | |
283 | // Return Flow Coefficient for a given particle type flow order | |
284 | // and particle momentum (Pt, Y) | |
285 | // | |
286 | ||
287 | Int_t index = fgkN - n; // default index (for all pdg) | |
288 | Float_t v = 0; | |
289 | ||
290 | // try to find specific parametrs | |
291 | ||
292 | for (Int_t i=0; i<fCounter; i++) { | |
293 | if ((Int_t)fParams[i][0] == pdg && | |
294 | (Int_t)fParams[i][1] == n) { | |
295 | ||
296 | index = i; | |
297 | break; | |
298 | } | |
299 | } | |
300 | ||
301 | // calculate v | |
302 | ||
303 | Int_t type = (Int_t)fParams[index][2]; | |
304 | ||
305 | if ((Int_t)fParams[index][1] == 1) { // Directed | |
306 | ||
307 | if (type == 0 ) | |
308 | v = fParams[index][3]; | |
309 | else | |
310 | v = (fParams[index][3] + fParams[index][4] * Pt) * TMath::Sign((Float_t)1.,Y) * | |
311 | (fParams[index][5] + fParams[index][6] * TMath::Abs(Y*Y*Y) ); | |
312 | ||
313 | } else { // Elliptic | |
314 | ||
315 | if (type == 0) v = fParams[index][3]; | |
316 | ||
317 | // Pion parameterisation | |
318 | if (type == 1) { | |
319 | if (Pt < fParams[index][4]) | |
320 | v = fParams[index][3] * (Pt / fParams[index][4]) ; | |
321 | else | |
322 | v = fParams[index][3]; | |
323 | ||
324 | v *= TMath::Exp( - fParams[index][5] * Y * Y); | |
325 | } | |
326 | ||
327 | // Old parameterisation | |
328 | if (type == 2) | |
329 | v = (fParams[index][3] + fParams[index][4] * Pt * Pt) * | |
330 | TMath::Exp( - fParams[index][5] * Y * Y); | |
331 | ||
332 | // New v2 parameterisation | |
333 | if (type == 3) { | |
334 | v = (fParams[index][3] + fParams[index][4] *Pt + fParams[index][5] *Pt*Pt) * | |
335 | TMath::Exp( - fParams[index][6] * Y*Y); | |
336 | if (v<0) | |
337 | v = 0; | |
338 | } | |
339 | } | |
340 | ||
341 | return v; | |
342 | } | |
343 | ||
344 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
345 | ||
346 | Float_t AliGenAfterBurnerFlow::GetNpNorm(Int_t npart) | |
347 | { | |
348 | // | |
349 | // Calculate npart norm. | |
350 | // | |
351 | ||
352 | if (npart<0) | |
353 | return 1; | |
354 | ||
355 | Int_t order = (Int_t)fNpParams[0]; | |
356 | if (order<0) | |
357 | return 1; | |
358 | ||
359 | Float_t ret = 0; | |
360 | Int_t npp = 1; | |
361 | for (Int_t i=0; i<=order; i++) { | |
362 | ret += npp*fNpParams[i+1]; | |
363 | npp *= npart; | |
364 | } | |
365 | return ret; | |
366 | } | |
367 | ||
368 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
369 | ||
370 | Bool_t AliGenAfterBurnerFlow::IsPrimary(Int_t pdg) | |
371 | { | |
372 | if(pdg>=fgkPDG) return kFALSE; | |
373 | return fIsPrim[pdg]; | |
374 | } | |
375 | ||
376 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
377 | ||
378 | Double_t CalcAngle(Double_t phi, Double_t phi0, Double_t phiRP, Double_t v2, Double_t v1=0.) | |
379 | { | |
380 | Double_t phi1 = phi-(phi+2*v1*TMath::Sin(phi-phiRP)+v2*TMath::Sin(2*(phi-phiRP))-phi0)/ | |
381 | (1.+2*v1*TMath::Cos(phi-phiRP)+ 2*v2*TMath::Cos(2*(phi-phiRP))); | |
382 | if(TMath::Abs(phi/phi1-1.)<0.00001) return phi1; | |
383 | return CalcAngle(phi1, phi0, phiRP, v2, v1); | |
384 | } | |
385 | ||
386 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
387 | ||
388 | void AliGenAfterBurnerFlow::InitPrimaries() | |
389 | { | |
390 | for(Int_t i=0; i<fgkPDG; i++) fIsPrim[i]=kFALSE; | |
391 | ||
392 | //mesons | |
393 | fIsPrim[211]=kTRUE; | |
394 | fIsPrim[311]=kTRUE; | |
395 | fIsPrim[321]=kTRUE; | |
396 | fIsPrim[411]=kTRUE; | |
397 | fIsPrim[421]=kTRUE; | |
398 | fIsPrim[431]=kTRUE; | |
399 | fIsPrim[511]=kTRUE; | |
400 | fIsPrim[521]=kTRUE; | |
401 | fIsPrim[531]=kTRUE; | |
402 | fIsPrim[541]=kTRUE; | |
403 | fIsPrim[111]=kTRUE; | |
404 | fIsPrim[221]=kTRUE; | |
405 | fIsPrim[331]=kTRUE; | |
406 | fIsPrim[441]=kTRUE; | |
407 | fIsPrim[551]=kTRUE; | |
408 | fIsPrim[130]=kTRUE; | |
409 | fIsPrim[310]=kTRUE; | |
410 | fIsPrim[213]=kTRUE; | |
411 | fIsPrim[313]=kTRUE; | |
412 | fIsPrim[323]=kTRUE; | |
413 | fIsPrim[413]=kTRUE; | |
414 | fIsPrim[423]=kTRUE; | |
415 | fIsPrim[433]=kTRUE; | |
416 | fIsPrim[513]=kTRUE; | |
417 | fIsPrim[523]=kTRUE; | |
418 | fIsPrim[533]=kTRUE; | |
419 | fIsPrim[543]=kTRUE; | |
420 | fIsPrim[113]=kTRUE; | |
421 | fIsPrim[223]=kTRUE; | |
422 | fIsPrim[333]=kTRUE; | |
423 | fIsPrim[443]=kTRUE; | |
424 | fIsPrim[553]=kTRUE; | |
425 | ||
426 | //baryons | |
427 | fIsPrim[2112]=kTRUE; | |
428 | fIsPrim[2212]=kTRUE; | |
429 | fIsPrim[3112]=kTRUE; | |
430 | fIsPrim[3122]=kTRUE; | |
431 | fIsPrim[3212]=kTRUE; | |
432 | fIsPrim[3222]=kTRUE; | |
433 | fIsPrim[3312]=kTRUE; | |
434 | fIsPrim[3322]=kTRUE; | |
435 | fIsPrim[4112]=kTRUE; | |
436 | fIsPrim[4122]=kTRUE; | |
437 | fIsPrim[4212]=kTRUE; | |
438 | fIsPrim[4222]=kTRUE; | |
439 | fIsPrim[4132]=kTRUE; | |
440 | fIsPrim[4312]=kTRUE; | |
441 | fIsPrim[4232]=kTRUE; | |
442 | fIsPrim[4322]=kTRUE; | |
443 | fIsPrim[4332]=kTRUE; | |
444 | fIsPrim[5112]=kTRUE; | |
445 | fIsPrim[5122]=kTRUE; | |
446 | fIsPrim[5212]=kTRUE; | |
447 | fIsPrim[5222]=kTRUE; | |
448 | fIsPrim[1114]=kTRUE; | |
449 | fIsPrim[2114]=kTRUE; | |
450 | fIsPrim[2214]=kTRUE; | |
451 | fIsPrim[2224]=kTRUE; | |
452 | fIsPrim[3114]=kTRUE; | |
453 | fIsPrim[3214]=kTRUE; | |
454 | fIsPrim[3224]=kTRUE; | |
455 | fIsPrim[3314]=kTRUE; | |
456 | fIsPrim[3324]=kTRUE; | |
457 | fIsPrim[3334]=kTRUE; | |
458 | fIsPrim[4114]=kTRUE; | |
459 | fIsPrim[4214]=kTRUE; | |
460 | fIsPrim[4224]=kTRUE; | |
461 | fIsPrim[4314]=kTRUE; | |
462 | fIsPrim[4324]=kTRUE; | |
463 | fIsPrim[4334]=kTRUE; | |
464 | fIsPrim[5114]=kTRUE; | |
465 | fIsPrim[5214]=kTRUE; | |
466 | fIsPrim[5224]=kTRUE; | |
467 | } | |
468 | ||
469 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
470 | ||
471 | void AliGenAfterBurnerFlow::Generate() | |
472 | { | |
473 | // | |
474 | // AliGenerator generate function doing actual job. | |
475 | // Algorythm: | |
476 | // | |
477 | // 1. loop over particles on the stack and choose primaries | |
478 | // 2. calculate delta phi | |
479 | // 3. change phi of primary particle and if it is non-stable | |
480 | // then its daughters' phi and vertex also | |
481 | // | |
482 | // For more details see : | |
483 | // M.G. Poghosyan | |
484 | // PWG2 meeting on 06.05.2008 and 03.06.2008 | |
485 | ||
486 | ||
487 | if (0) | |
488 | for(Int_t ii=0; ii<fCounter;ii++) | |
489 | { | |
490 | printf("%d %f %f %f %f\n",ii,fParams[ii][0],fParams[ii][1],fParams[ii][2],fParams[ii][3]); | |
491 | } | |
492 | ||
493 | AliGenCocktailAfterBurner *gen; | |
494 | ||
495 | TParticle *particle; | |
496 | TParticle *particleM; | |
497 | TLorentzVector momentum; | |
498 | TLorentzVector vertex; | |
499 | ||
500 | Int_t pdg; | |
501 | Float_t phi; | |
502 | Float_t pt, y; | |
503 | ||
504 | // Get Stack of the first Generator | |
505 | // gen = (AliGenCocktailAfterBurner *)gAlice->Generator(); | |
506 | gen = (AliGenCocktailAfterBurner *)gAlice->GetMCApp()->Generator(); | |
507 | ||
508 | ||
509 | AliGenerator* genHijing = 0 ; | |
510 | AliCollisionGeometry* geom = 0 ; | |
511 | AliGenCocktailEntry* entry = 0 ; | |
512 | TList* fEntries = 0 ; | |
513 | ||
514 | TRandom* rand = new TRandom(0) ; | |
515 | for(Int_t ns=0;ns<gen->GetNumberOfEvents();ns++) | |
516 | { | |
517 | gen->SetActiveEventNumber(ns) ; | |
518 | ||
519 | fStack = gen->GetStack(ns); | |
520 | fEntries = gen->Entries() ; | |
521 | ||
522 | TIter next(fEntries) ; | |
523 | Int_t npart = -1; | |
524 | ||
525 | if(fHow == 0) // hijing R.P. | |
526 | { | |
527 | while((entry = (AliGenCocktailEntry*)next())) | |
528 | { | |
529 | Info("Generate (e)","Using R.P. from HIJING ... "); | |
530 | genHijing = entry->Generator() ; | |
531 | if(genHijing->ProvidesCollisionGeometry()) | |
532 | { | |
533 | geom = gen->GetCollisionGeometry(ns) ; | |
534 | fReactionPlane = geom->ReactionPlaneAngle() ; | |
535 | npart = geom->ProjectileParticipants() + geom->TargetParticipants(); | |
536 | break; | |
537 | } | |
538 | else | |
539 | { | |
540 | Error("Generate (e)", "NO CollisionGeometry !!! - using fixed R.P. angle = 0. ") ; | |
541 | fReactionPlane = 0. ; | |
542 | } | |
543 | } | |
544 | } | |
545 | else if(fHow ==1 ) // fixed R.P. | |
546 | { | |
547 | Info("Generate (e)","Using fixed R.P. ..."); | |
548 | } | |
549 | else | |
550 | { | |
551 | Info("Generate (e)","Using random R.P.s ... "); | |
552 | fReactionPlane = 2 * TMath::Pi() * rand->Rndm() ; | |
553 | } | |
554 | ||
555 | cout << " * Reaction Plane Angle (event " << ns << ") = " << fReactionPlane << | |
556 | " rad. ( = " << (360*fReactionPlane/(2*TMath::Pi())) << " deg.) Npart = " << npart << "* " << endl ; | |
557 | ||
558 | Int_t nParticles = fStack->GetNprimary(); | |
559 | for (Int_t i=0; i<nParticles; i++) | |
560 | { | |
561 | particle = fStack->Particle(i); | |
562 | ||
563 | Int_t iM=particle->GetMother(0); | |
564 | pdg = particle->GetPdgCode(); | |
565 | ||
566 | //exclude incoming protons in PYTHIA | |
567 | if(particle->GetPdgCode()==21) continue; | |
568 | ||
569 | if(TMath::Abs(pdg)>=fgkPDG) continue; | |
570 | // is particle primary? | |
571 | if(!fIsPrim[TMath::Abs(pdg)]) continue; | |
572 | ||
573 | if(iM>0) | |
574 | { | |
575 | particleM = fStack->Particle(iM); | |
576 | Int_t pdgM = TMath::Abs(particleM->GetPdgCode()); | |
577 | // is mother primary? | |
578 | if((TMath::Abs(pdgM)<fgkPDG)&&fIsPrim[TMath::Abs(pdgM)]) continue; | |
579 | } | |
580 | ||
581 | particle->Momentum(momentum); | |
582 | phi = particle->Phi(); | |
583 | ||
584 | // get Pt, y | |
585 | pt = momentum.Pt() ; | |
586 | y = 10000.; | |
587 | ||
588 | if(TMath::Abs(momentum.Z()) != TMath::Abs(momentum.T())) | |
589 | y = momentum.Rapidity() ; | |
590 | ||
591 | Double_t v1 = GetCoefficient(pdg, 1, pt, y); | |
592 | Double_t v2 = GetCoefficient(pdg, 2, pt, y); | |
593 | Double_t npartnorm = GetNpNorm(npart); | |
594 | v2 *= npartnorm; | |
595 | ||
596 | //printf("ntup %d %f %f %f %f %f\n ",npart, v1, v2, pt, y, npartnorm); | |
597 | ||
598 | Double_t phi1 = CalcAngle(phi, phi, fReactionPlane,v2,v1); | |
599 | ||
600 | Rotate(i, phi1-phi); | |
601 | } | |
602 | } | |
603 | ||
604 | Info("Generate","Flow After Burner: DONE"); | |
605 | } | |
606 | ||
607 | //////////////////////////////////////////////////////////////////////////////////////////////////// | |
608 | ||
609 | void AliGenAfterBurnerFlow::Rotate(Int_t i, Double_t phi, Bool_t IsPrim) | |
610 | { | |
611 | TParticle* particle = fStack->Particle(i); | |
612 | ||
613 | TLorentzVector momentum; | |
614 | particle->Momentum(momentum); | |
615 | momentum.RotateZ(phi); | |
616 | particle->SetMomentum(momentum); | |
617 | ||
618 | if(!IsPrim) | |
619 | { | |
620 | TLorentzVector vertex; | |
621 | particle->ProductionVertex(vertex); | |
622 | vertex.RotateZ(phi); | |
623 | particle->SetProductionVertex(vertex); | |
624 | } | |
625 | ||
626 | if(particle->GetFirstDaughter()<0) return; | |
627 | for(Int_t iD=particle->GetFirstDaughter(); iD<=particle->GetLastDaughter(); iD++) Rotate(iD, phi, kFALSE); | |
628 | ||
629 | return; | |
630 | } | |
631 | ||
632 |