New class added.
[u/mrichter/AliRoot.git] / EVGEN / AliGenAfterBurnerFlow.cxx
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ac3faee4 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 **************************************************************************/
4966b266 15
ac3faee4 16/* $Id$ */
17
18///////////////////////////////////////////////////////////////////////////////
4966b266 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//
4966b266 24// Author:
f9f62d8e 25// Sylwester Radomski, 2002
26// Martin Poghosyan, 2008
27// Constantin Loizides, 2010
ac3faee4 28//////////////////////////////////////////////////////////////////////////////
4966b266 29
b2ab503d 30#include <Riostream.h>
f9f62d8e 31#include <TParticle.h>
32#include <TLorentzVector.h>
33#include <TList.h>
34#include <TRandom.h>
4966b266 35#include "AliStack.h"
36#include "AliGenAfterBurnerFlow.h"
37#include "AliGenCocktailAfterBurner.h"
f9f62d8e 38#include "AliMC.h"
4a33c50d 39#include "AliRun.h"
cc41459d 40#include "AliCollisionGeometry.h"
41#include "AliGenCocktailEntry.h"
f9f62d8e 42
cc41459d 43
4966b266 44ClassImp(AliGenAfterBurnerFlow)
45
4966b266 46
f9f62d8e 47AliGenAfterBurnerFlow::AliGenAfterBurnerFlow():AliGenerator(),
48 fReactionPlane(0),
49 fHow(0),
50 fCounter(0),
51 fStack(0)
1c56e311 52{
f9f62d8e 53 //
54 // Default Construction
55 InitPrimaries();
56 SetNpParams();
4966b266 57}
58
f9f62d8e 59AliGenAfterBurnerFlow::AliGenAfterBurnerFlow(Float_t reactionPlane):AliGenerator(),
60 fReactionPlane(TMath::Pi()*reactionPlane/180.),
61 fHow(1),
62 fCounter(0),
63 fStack(0)
1c56e311 64{
cc41459d 65 // reactionPlane - Reaction Plane Angle given in Deg [0-360]
66 // but stored and applied in radiants (standard for TParticle & AliCollisionGeometry)
67
f9f62d8e 68 InitPrimaries();
69 SetNpParams();
4966b266 70}
71
72////////////////////////////////////////////////////////////////////////////////////////////////////
73
f9f62d8e 74AliGenAfterBurnerFlow::~AliGenAfterBurnerFlow()
75{
76 // def. dest.
4966b266 77}
78
f9f62d8e 79void AliGenAfterBurnerFlow::SetDirectedSimple(Int_t pdg, Float_t v1)
80{
7e4131fc 81 //
82 // Set Directed Flow
83 // The same directed flow is applied to all specified particles
84 // independently on transverse momentum or rapidity
85 //
86 // PDG - particle type to apply directed flow
87 // if (PDG == 0) use as default
88 //
89
90 SetFlowParameters(pdg, 1, 0, v1, 0, 0, 0);
91}
92
93////////////////////////////////////////////////////////////////////////////////////////////////////
94
f9f62d8e 95void AliGenAfterBurnerFlow::SetDirectedParam(Int_t pdg, Float_t v11, Float_t v12,
96 Float_t v13, Float_t v14)
97{
7e4131fc 98 //
99 // Set Directed Flow
100 // Directed flow is parameterised as follows
4966b266 101 //
f9f62d8e 102 // V1(Pt,Y) = (V11 + V12*Pt) * sign(Y) * (V13 + V14 * abs(Y)^3)
4966b266 103 //
104 // where sign = 1 for Y > 0 and -1 for Y < 0
105 //
106 // Defaults values
107 // v12 = v14 = 0
108 // v13 = 1
7e4131fc 109 //
110 // PDG - particle type to apply directed flow
111 // if (PDG == 0) use as default
112 //
113
114 SetFlowParameters(pdg, 1, 1, v11, v12, v13, v14);
4966b266 115}
116
117////////////////////////////////////////////////////////////////////////////////////////////////////
118
f9f62d8e 119void AliGenAfterBurnerFlow::SetEllipticSimple(Int_t pdg, Float_t v2)
120{
4966b266 121 //
7e4131fc 122 // Set Elliptic Flow
123 // The same Elliptic flow is applied to all specified particles
124 // independently on transverse momentum or rapidity
4966b266 125 //
7e4131fc 126 // PDG - particle type to apply directed flow
127 // if (PDG == 0) use as default
4966b266 128 //
7e4131fc 129 // V2 - flow coefficient
130 //
131 // NOTE: for starting playing with FLOW
132 // start with this function and values 0.05 - 0.1
4966b266 133 //
134
7e4131fc 135 SetFlowParameters(pdg, 2, 0, v2, 0, 0, 0);
4966b266 136}
137
138////////////////////////////////////////////////////////////////////////////////////////////////////
139
f9f62d8e 140void AliGenAfterBurnerFlow::SetEllipticParam(Int_t pdg,
141 Float_t v00, Float_t v10, Float_t v11,
142 Float_t v22)
143{
144 //
145 // Set Elliptic Flow
146 //
147 // Elliptic flow is parametrised to reproduce
148 // V2 of Pions at RHIC energies and is given by:
149 //
150 // V2 = (v00 + v10*pt + v11*pt^2) * exp (-v22 * y^2) and zero if V2<0.
151 //
152
153 SetFlowParameters(pdg, 2, 3, v00, v10, v11, v22);
154}
155
156void AliGenAfterBurnerFlow::SetEllipticParamPion(Int_t pdg, Float_t v21,
157 Float_t pTmax, Float_t v22)
158{
7e4131fc 159 //
160 // Set Elliptic Flow
161 //
162 // Elliptic flow is parametrised to reproduce
163 // V2 of Pions at RHIC energies and is given by:
4966b266 164 //
7e4131fc 165 // V2 = v21 * (pT/pTMax ) * exp (-v22 * y^2) where pT <= pTmax
f9f62d8e 166 // v21 * exp (-v22 * y^2) where pT > pTmax
4966b266 167 //
7e4131fc 168 // v21 - value at saturation
169 // pTmax - saturation transverse momentum
f9f62d8e 170 // v22 - rapidity decreasing
4966b266 171 //
172
7e4131fc 173 SetFlowParameters(pdg, 2, 1, v21, pTmax, v22, 0);
4966b266 174}
175
176////////////////////////////////////////////////////////////////////////////////////////////////////
177
f9f62d8e 178void AliGenAfterBurnerFlow::SetEllipticParamOld(Int_t pdg, Float_t v21, Float_t v22, Float_t v23)
179{
7e4131fc 180 //
181 // Set Elliptic Flow
4966b266 182 //
7e4131fc 183 // Elliptic flow is parameterised using
184 // old MevSim parameterisation
185 //
186 // V2 = (V21 + V22 pT^2) * exp (-v22 * y^2)
4966b266 187 //
188
7e4131fc 189 SetFlowParameters(pdg, 2, 2, v21, v22, v23, 0);
4966b266 190}
191
192////////////////////////////////////////////////////////////////////////////////////////////////////
193
f9f62d8e 194void AliGenAfterBurnerFlow::SetNpParams(Int_t order, Float_t p0, Float_t p1, Float_t p2, Float_t p3)
195{
196 //
197 // Set npart parameterization.
198 //
199
200 fNpParams[0] = order;
201 fNpParams[1] = p0;
202 fNpParams[2] = p1;
203 fNpParams[3] = p2;
204 fNpParams[4] = p3;
205}
206
207////////////////////////////////////////////////////////////////////////////////////////////////////
208
209void AliGenAfterBurnerFlow::SetFlowParameters(Int_t pdg, Int_t order, Int_t type,
210 Float_t v1, Float_t v2,Float_t v3,Float_t v4)
211{
4966b266 212 //
213 // private function
214 //
f9f62d8e 215
3a2811d4 216 if(TMath::Abs(pdg)>=fgkPDG){
f9f62d8e 217 Error("AliAfterBurnerFlow","Overflow");
218 return;
219 }
220 fIsPrim[TMath::Abs(pdg)]=kTRUE;
4966b266 221
222 Int_t index = 0;
7e4131fc 223 Bool_t newEntry = kTRUE;
4966b266 224
225 // Defaults
4966b266 226 if (pdg == 0) {
0af12c00 227 index = fgkN - order;
7e4131fc 228 newEntry = kFALSE;
4966b266 229 }
230
231 // try to find existing entry
232 for (Int_t i=0; i<fCounter; i++) {
233 if (pdg == (Int_t)fParams[i][0] &&
234 order == (Int_t)fParams[i][1]) {
235
236 index = i;
7e4131fc 237 newEntry = kFALSE;
4966b266 238 }
239 }
240
241 // check fCounter
242
0af12c00 243 if (newEntry && (fCounter > fgkN-3)) {
4966b266 244 Error("AliAfterBurnerFlow","Overflow");
245 return;
246 }
247
248 if (newEntry) {
249 index = fCounter;
250 fCounter++;
251 }
252
253 // Set new particle type
254
255 fParams[index][0] = pdg;
256 fParams[index][1] = order;
7e4131fc 257 fParams[index][2] = type;
258 fParams[index][3] = v1;
259 fParams[index][4] = v2;
260 fParams[index][5] = v3;
261 fParams[index][6] = v4;
4966b266 262}
263
264////////////////////////////////////////////////////////////////////////////////////////////////////
265
f9f62d8e 266void AliGenAfterBurnerFlow::Init()
267{
4966b266 268 //
269 // Standard AliGenerator Initializer
270 //
271
f9f62d8e 272 if(fHow == 0) { Info("AliGenAfterBurnerFlow", "Using the Hijing R.P. Angle event by event "); }
273 else if(fHow == 1){ Info("AliGenAfterBurnerFlow", "Using a fixed R.P. Angle for every event ") ; }
274 else { Info("AliGenAfterBurnerFlow",
275 "Using a random R.P. Angle event by event ( ! not the same used by Hijing ! ) "); }
4966b266 276}
277
278////////////////////////////////////////////////////////////////////////////////////////////////////
279
f9f62d8e 280Float_t AliGenAfterBurnerFlow::GetCoefficient(Int_t pdg, Int_t n, Float_t Pt, Float_t Y) const
281{
4966b266 282 //
283 // private function
284 // Return Flow Coefficient for a given particle type flow order
285 // and particle momentum (Pt, Y)
286 //
287
f9f62d8e 288 Int_t index = fgkN - n; // default index (for all pdg)
4966b266 289 Float_t v = 0;
290
291 // try to find specific parametrs
292
293 for (Int_t i=0; i<fCounter; i++) {
4966b266 294 if ((Int_t)fParams[i][0] == pdg &&
295 (Int_t)fParams[i][1] == n) {
296
297 index = i;
298 break;
299 }
300 }
301
302 // calculate v
303
7e4131fc 304 Int_t type = (Int_t)fParams[index][2];
305
4966b266 306 if ((Int_t)fParams[index][1] == 1) { // Directed
7e4131fc 307
308 if (type == 0 )
309 v = fParams[index][3];
310 else
311 v = (fParams[index][3] + fParams[index][4] * Pt) * TMath::Sign((Float_t)1.,Y) *
312 (fParams[index][5] + fParams[index][6] * TMath::Abs(Y*Y*Y) );
4966b266 313
314 } else { // Elliptic
315
7e4131fc 316 if (type == 0) v = fParams[index][3];
317
318 // Pion parameterisation
7e4131fc 319 if (type == 1) {
320 if (Pt < fParams[index][4])
321 v = fParams[index][3] * (Pt / fParams[index][4]) ;
322 else
323 v = fParams[index][3];
324
325 v *= TMath::Exp( - fParams[index][5] * Y * Y);
326 }
327
328 // Old parameterisation
7e4131fc 329 if (type == 2)
330 v = (fParams[index][3] + fParams[index][4] * Pt * Pt) *
331 TMath::Exp( - fParams[index][5] * Y * Y);
f9f62d8e 332
333 // New v2 parameterisation
334 if (type == 3) {
335 v = (fParams[index][3] + fParams[index][4] *Pt + fParams[index][5] *Pt*Pt) *
336 TMath::Exp( - fParams[index][6] * Y*Y);
337 if (v<0)
338 v = 0;
339 }
4966b266 340 }
341
342 return v;
343}
344
345////////////////////////////////////////////////////////////////////////////////////////////////////
346
4a33c50d 347Float_t AliGenAfterBurnerFlow::GetNpNorm(Int_t npart) const
f9f62d8e 348{
349 //
350 // Calculate npart norm.
351 //
352
353 if (npart<0)
354 return 1;
355
356 Int_t order = (Int_t)fNpParams[0];
357 if (order<0)
358 return 1;
359
360 Float_t ret = 0;
361 Int_t npp = 1;
362 for (Int_t i=0; i<=order; i++) {
363 ret += npp*fNpParams[i+1];
364 npp *= npart;
365 }
366 return ret;
367}
368
369////////////////////////////////////////////////////////////////////////////////////////////////////
370
4a33c50d 371Bool_t AliGenAfterBurnerFlow::IsPrimary(Int_t pdg) const
f9f62d8e 372{
3a2811d4 373 if(pdg>=fgkPDG) return kFALSE;
f9f62d8e 374 return fIsPrim[pdg];
375}
376
377////////////////////////////////////////////////////////////////////////////////////////////////////
378
379Double_t CalcAngle(Double_t phi, Double_t phi0, Double_t phiRP, Double_t v2, Double_t v1=0.)
380{
4a33c50d 381 // Calculate relative angle
f9f62d8e 382 Double_t phi1 = phi-(phi+2*v1*TMath::Sin(phi-phiRP)+v2*TMath::Sin(2*(phi-phiRP))-phi0)/
383 (1.+2*v1*TMath::Cos(phi-phiRP)+ 2*v2*TMath::Cos(2*(phi-phiRP)));
384 if(TMath::Abs(phi/phi1-1.)<0.00001) return phi1;
385 return CalcAngle(phi1, phi0, phiRP, v2, v1);
386}
387
388////////////////////////////////////////////////////////////////////////////////////////////////////
389
390void AliGenAfterBurnerFlow::InitPrimaries()
391{
4a33c50d 392 // Init the primary particle list
f9f62d8e 393 for(Int_t i=0; i<fgkPDG; i++) fIsPrim[i]=kFALSE;
394
395 //mesons
396 fIsPrim[211]=kTRUE;
397 fIsPrim[311]=kTRUE;
398 fIsPrim[321]=kTRUE;
399 fIsPrim[411]=kTRUE;
400 fIsPrim[421]=kTRUE;
401 fIsPrim[431]=kTRUE;
402 fIsPrim[511]=kTRUE;
403 fIsPrim[521]=kTRUE;
404 fIsPrim[531]=kTRUE;
405 fIsPrim[541]=kTRUE;
406 fIsPrim[111]=kTRUE;
407 fIsPrim[221]=kTRUE;
408 fIsPrim[331]=kTRUE;
409 fIsPrim[441]=kTRUE;
410 fIsPrim[551]=kTRUE;
411 fIsPrim[130]=kTRUE;
412 fIsPrim[310]=kTRUE;
413 fIsPrim[213]=kTRUE;
414 fIsPrim[313]=kTRUE;
415 fIsPrim[323]=kTRUE;
416 fIsPrim[413]=kTRUE;
417 fIsPrim[423]=kTRUE;
418 fIsPrim[433]=kTRUE;
419 fIsPrim[513]=kTRUE;
420 fIsPrim[523]=kTRUE;
421 fIsPrim[533]=kTRUE;
422 fIsPrim[543]=kTRUE;
423 fIsPrim[113]=kTRUE;
424 fIsPrim[223]=kTRUE;
425 fIsPrim[333]=kTRUE;
426 fIsPrim[443]=kTRUE;
427 fIsPrim[553]=kTRUE;
428
429 //baryons
430 fIsPrim[2112]=kTRUE;
431 fIsPrim[2212]=kTRUE;
432 fIsPrim[3112]=kTRUE;
433 fIsPrim[3122]=kTRUE;
434 fIsPrim[3212]=kTRUE;
435 fIsPrim[3222]=kTRUE;
436 fIsPrim[3312]=kTRUE;
437 fIsPrim[3322]=kTRUE;
438 fIsPrim[4112]=kTRUE;
439 fIsPrim[4122]=kTRUE;
440 fIsPrim[4212]=kTRUE;
441 fIsPrim[4222]=kTRUE;
442 fIsPrim[4132]=kTRUE;
443 fIsPrim[4312]=kTRUE;
444 fIsPrim[4232]=kTRUE;
445 fIsPrim[4322]=kTRUE;
446 fIsPrim[4332]=kTRUE;
447 fIsPrim[5112]=kTRUE;
448 fIsPrim[5122]=kTRUE;
449 fIsPrim[5212]=kTRUE;
450 fIsPrim[5222]=kTRUE;
451 fIsPrim[1114]=kTRUE;
452 fIsPrim[2114]=kTRUE;
453 fIsPrim[2214]=kTRUE;
454 fIsPrim[2224]=kTRUE;
455 fIsPrim[3114]=kTRUE;
456 fIsPrim[3214]=kTRUE;
457 fIsPrim[3224]=kTRUE;
458 fIsPrim[3314]=kTRUE;
459 fIsPrim[3324]=kTRUE;
460 fIsPrim[3334]=kTRUE;
461 fIsPrim[4114]=kTRUE;
462 fIsPrim[4214]=kTRUE;
463 fIsPrim[4224]=kTRUE;
464 fIsPrim[4314]=kTRUE;
465 fIsPrim[4324]=kTRUE;
466 fIsPrim[4334]=kTRUE;
467 fIsPrim[5114]=kTRUE;
468 fIsPrim[5214]=kTRUE;
469 fIsPrim[5224]=kTRUE;
470}
471
472////////////////////////////////////////////////////////////////////////////////////////////////////
473
474void AliGenAfterBurnerFlow::Generate()
475{
4966b266 476 //
477 // AliGenerator generate function doing actual job.
478 // Algorythm:
479 //
f9f62d8e 480 // 1. loop over particles on the stack and choose primaries
481 // 2. calculate delta phi
482 // 3. change phi of primary particle and if it is non-stable
483 // then its daughters' phi and vertex also
4966b266 484 //
f9f62d8e 485 // For more details see :
486 // M.G. Poghosyan
487 // PWG2 meeting on 06.05.2008 and 03.06.2008
488
f9f62d8e 489
490 if (0)
491 for(Int_t ii=0; ii<fCounter;ii++)
492 {
493 printf("%d %f %f %f %f\n",ii,fParams[ii][0],fParams[ii][1],fParams[ii][2],fParams[ii][3]);
494 }
495
4966b266 496 AliGenCocktailAfterBurner *gen;
f9f62d8e 497
4966b266 498 TParticle *particle;
f9f62d8e 499 TParticle *particleM;
4966b266 500 TLorentzVector momentum;
f9f62d8e 501 TLorentzVector vertex;
4966b266 502
503 Int_t pdg;
f9f62d8e 504 Float_t phi;
4966b266 505 Float_t pt, y;
506
507 // Get Stack of the first Generator
f9f62d8e 508 // gen = (AliGenCocktailAfterBurner *)gAlice->Generator();
3e2e3ece 509 gen = (AliGenCocktailAfterBurner *)gAlice->GetMCApp()->Generator();
4966b266 510
cc41459d 511
512 AliGenerator* genHijing = 0 ;
513 AliCollisionGeometry* geom = 0 ;
514 AliGenCocktailEntry* entry = 0 ;
515 TList* fEntries = 0 ;
516
517 TRandom* rand = new TRandom(0) ;
cc41459d 518 for(Int_t ns=0;ns<gen->GetNumberOfEvents();ns++)
519 {
f9f62d8e 520 gen->SetActiveEventNumber(ns) ;
521
522 fStack = gen->GetStack(ns);
523 fEntries = gen->Entries() ;
524
525 TIter next(fEntries) ;
526 Int_t npart = -1;
cc41459d 527
cc41459d 528 if(fHow == 0) // hijing R.P.
529 {
f9f62d8e 530 while((entry = (AliGenCocktailEntry*)next()))
531 {
532 Info("Generate (e)","Using R.P. from HIJING ... ");
533 genHijing = entry->Generator() ;
534 if(genHijing->ProvidesCollisionGeometry())
535 {
536 geom = gen->GetCollisionGeometry(ns) ;
537 fReactionPlane = geom->ReactionPlaneAngle() ;
538 npart = geom->ProjectileParticipants() + geom->TargetParticipants();
539 break;
540 }
541 else
542 {
543 Error("Generate (e)", "NO CollisionGeometry !!! - using fixed R.P. angle = 0. ") ;
544 fReactionPlane = 0. ;
545 }
546 }
cc41459d 547 }
f9f62d8e 548 else if(fHow ==1 ) // fixed R.P.
cc41459d 549 {
f9f62d8e 550 Info("Generate (e)","Using fixed R.P. ...");
cc41459d 551 }
f9f62d8e 552 else
cc41459d 553 {
f9f62d8e 554 Info("Generate (e)","Using random R.P.s ... ");
555 fReactionPlane = 2 * TMath::Pi() * rand->Rndm() ;
cc41459d 556 }
f9f62d8e 557
558 cout << " * Reaction Plane Angle (event " << ns << ") = " << fReactionPlane <<
559 " rad. ( = " << (360*fReactionPlane/(2*TMath::Pi())) << " deg.) Npart = " << npart << "* " << endl ;
cc41459d 560
f9f62d8e 561 Int_t nParticles = fStack->GetNprimary();
562 for (Int_t i=0; i<nParticles; i++)
563 {
564 particle = fStack->Particle(i);
565
566 Int_t iM=particle->GetMother(0);
567 pdg = particle->GetPdgCode();
568
569 //exclude incoming protons in PYTHIA
570 if(particle->GetPdgCode()==21) continue;
571
3a2811d4 572 if(TMath::Abs(pdg)>=fgkPDG) continue;
f9f62d8e 573 // is particle primary?
574 if(!fIsPrim[TMath::Abs(pdg)]) continue;
575
576 if(iM>0)
577 {
578 particleM = fStack->Particle(iM);
579 Int_t pdgM = TMath::Abs(particleM->GetPdgCode());
580 // is mother primary?
581 if((TMath::Abs(pdgM)<fgkPDG)&&fIsPrim[TMath::Abs(pdgM)]) continue;
582 }
cc41459d 583
f9f62d8e 584 particle->Momentum(momentum);
585 phi = particle->Phi();
cc41459d 586
f9f62d8e 587 // get Pt, y
588 pt = momentum.Pt() ;
589 y = 10000.;
cc41459d 590
f9f62d8e 591 if(TMath::Abs(momentum.Z()) != TMath::Abs(momentum.T()))
592 y = momentum.Rapidity() ;
593
594 Double_t v1 = GetCoefficient(pdg, 1, pt, y);
595 Double_t v2 = GetCoefficient(pdg, 2, pt, y);
596 Double_t npartnorm = GetNpNorm(npart);
597 v2 *= npartnorm;
cc41459d 598
f9f62d8e 599 //printf("ntup %d %f %f %f %f %f\n ",npart, v1, v2, pt, y, npartnorm);
cc41459d 600
f9f62d8e 601 Double_t phi1 = CalcAngle(phi, phi, fReactionPlane,v2,v1);
cc41459d 602
f9f62d8e 603 Rotate(i, phi1-phi);
604 }
4966b266 605 }
606
7e4131fc 607 Info("Generate","Flow After Burner: DONE");
4966b266 608}
609
610////////////////////////////////////////////////////////////////////////////////////////////////////
611
f9f62d8e 612void AliGenAfterBurnerFlow::Rotate(Int_t i, Double_t phi, Bool_t IsPrim)
613{
4a33c50d 614 // Rotation
f9f62d8e 615 TParticle* particle = fStack->Particle(i);
616
617 TLorentzVector momentum;
618 particle->Momentum(momentum);
619 momentum.RotateZ(phi);
620 particle->SetMomentum(momentum);
621
622 if(!IsPrim)
623 {
624 TLorentzVector vertex;
625 particle->ProductionVertex(vertex);
626 vertex.RotateZ(phi);
627 particle->SetProductionVertex(vertex);
628 }
629
630 if(particle->GetFirstDaughter()<0) return;
631 for(Int_t iD=particle->GetFirstDaughter(); iD<=particle->GetLastDaughter(); iD++) Rotate(iD, phi, kFALSE);
632
633 return;
634}
635
636