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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
83cb58d0 44using std::cout;
45using std::endl;
4966b266 46ClassImp(AliGenAfterBurnerFlow)
47
4966b266 48
f9f62d8e 49AliGenAfterBurnerFlow::AliGenAfterBurnerFlow():AliGenerator(),
50 fReactionPlane(0),
51 fHow(0),
52 fCounter(0),
53 fStack(0)
1c56e311 54{
f9f62d8e 55 //
56 // Default Construction
57 InitPrimaries();
58 SetNpParams();
4966b266 59}
60
f9f62d8e 61AliGenAfterBurnerFlow::AliGenAfterBurnerFlow(Float_t reactionPlane):AliGenerator(),
62 fReactionPlane(TMath::Pi()*reactionPlane/180.),
63 fHow(1),
64 fCounter(0),
65 fStack(0)
1c56e311 66{
cc41459d 67 // reactionPlane - Reaction Plane Angle given in Deg [0-360]
68 // but stored and applied in radiants (standard for TParticle & AliCollisionGeometry)
69
f9f62d8e 70 InitPrimaries();
71 SetNpParams();
4966b266 72}
73
74////////////////////////////////////////////////////////////////////////////////////////////////////
75
f9f62d8e 76AliGenAfterBurnerFlow::~AliGenAfterBurnerFlow()
77{
78 // def. dest.
4966b266 79}
80
f9f62d8e 81void AliGenAfterBurnerFlow::SetDirectedSimple(Int_t pdg, Float_t v1)
82{
7e4131fc 83 //
84 // Set Directed Flow
85 // The same directed flow is applied to all specified particles
86 // independently on transverse momentum or rapidity
87 //
88 // PDG - particle type to apply directed flow
89 // if (PDG == 0) use as default
90 //
91
92 SetFlowParameters(pdg, 1, 0, v1, 0, 0, 0);
93}
94
95////////////////////////////////////////////////////////////////////////////////////////////////////
96
f9f62d8e 97void AliGenAfterBurnerFlow::SetDirectedParam(Int_t pdg, Float_t v11, Float_t v12,
98 Float_t v13, Float_t v14)
99{
7e4131fc 100 //
101 // Set Directed Flow
102 // Directed flow is parameterised as follows
4966b266 103 //
f9f62d8e 104 // V1(Pt,Y) = (V11 + V12*Pt) * sign(Y) * (V13 + V14 * abs(Y)^3)
4966b266 105 //
106 // where sign = 1 for Y > 0 and -1 for Y < 0
107 //
108 // Defaults values
109 // v12 = v14 = 0
110 // v13 = 1
7e4131fc 111 //
112 // PDG - particle type to apply directed flow
113 // if (PDG == 0) use as default
114 //
115
116 SetFlowParameters(pdg, 1, 1, v11, v12, v13, v14);
4966b266 117}
118
119////////////////////////////////////////////////////////////////////////////////////////////////////
120
f9f62d8e 121void AliGenAfterBurnerFlow::SetEllipticSimple(Int_t pdg, Float_t v2)
122{
4966b266 123 //
7e4131fc 124 // Set Elliptic Flow
125 // The same Elliptic flow is applied to all specified particles
126 // independently on transverse momentum or rapidity
4966b266 127 //
7e4131fc 128 // PDG - particle type to apply directed flow
129 // if (PDG == 0) use as default
4966b266 130 //
7e4131fc 131 // V2 - flow coefficient
132 //
133 // NOTE: for starting playing with FLOW
134 // start with this function and values 0.05 - 0.1
4966b266 135 //
136
7e4131fc 137 SetFlowParameters(pdg, 2, 0, v2, 0, 0, 0);
4966b266 138}
139
140////////////////////////////////////////////////////////////////////////////////////////////////////
141
f9f62d8e 142void AliGenAfterBurnerFlow::SetEllipticParam(Int_t pdg,
143 Float_t v00, Float_t v10, Float_t v11,
144 Float_t v22)
145{
146 //
147 // Set Elliptic Flow
148 //
149 // Elliptic flow is parametrised to reproduce
150 // V2 of Pions at RHIC energies and is given by:
151 //
152 // V2 = (v00 + v10*pt + v11*pt^2) * exp (-v22 * y^2) and zero if V2<0.
153 //
154
155 SetFlowParameters(pdg, 2, 3, v00, v10, v11, v22);
156}
157
158void AliGenAfterBurnerFlow::SetEllipticParamPion(Int_t pdg, Float_t v21,
159 Float_t pTmax, Float_t v22)
160{
7e4131fc 161 //
162 // Set Elliptic Flow
163 //
164 // Elliptic flow is parametrised to reproduce
165 // V2 of Pions at RHIC energies and is given by:
4966b266 166 //
7e4131fc 167 // V2 = v21 * (pT/pTMax ) * exp (-v22 * y^2) where pT <= pTmax
f9f62d8e 168 // v21 * exp (-v22 * y^2) where pT > pTmax
4966b266 169 //
7e4131fc 170 // v21 - value at saturation
171 // pTmax - saturation transverse momentum
f9f62d8e 172 // v22 - rapidity decreasing
4966b266 173 //
174
7e4131fc 175 SetFlowParameters(pdg, 2, 1, v21, pTmax, v22, 0);
4966b266 176}
177
178////////////////////////////////////////////////////////////////////////////////////////////////////
179
f9f62d8e 180void AliGenAfterBurnerFlow::SetEllipticParamOld(Int_t pdg, Float_t v21, Float_t v22, Float_t v23)
181{
7e4131fc 182 //
183 // Set Elliptic Flow
4966b266 184 //
7e4131fc 185 // Elliptic flow is parameterised using
186 // old MevSim parameterisation
187 //
188 // V2 = (V21 + V22 pT^2) * exp (-v22 * y^2)
4966b266 189 //
190
7e4131fc 191 SetFlowParameters(pdg, 2, 2, v21, v22, v23, 0);
4966b266 192}
193
194////////////////////////////////////////////////////////////////////////////////////////////////////
195
f9f62d8e 196void AliGenAfterBurnerFlow::SetNpParams(Int_t order, Float_t p0, Float_t p1, Float_t p2, Float_t p3)
197{
198 //
199 // Set npart parameterization.
200 //
201
202 fNpParams[0] = order;
203 fNpParams[1] = p0;
204 fNpParams[2] = p1;
205 fNpParams[3] = p2;
206 fNpParams[4] = p3;
207}
208
209////////////////////////////////////////////////////////////////////////////////////////////////////
210
211void AliGenAfterBurnerFlow::SetFlowParameters(Int_t pdg, Int_t order, Int_t type,
212 Float_t v1, Float_t v2,Float_t v3,Float_t v4)
213{
4966b266 214 //
215 // private function
216 //
f9f62d8e 217
3a2811d4 218 if(TMath::Abs(pdg)>=fgkPDG){
f9f62d8e 219 Error("AliAfterBurnerFlow","Overflow");
220 return;
221 }
222 fIsPrim[TMath::Abs(pdg)]=kTRUE;
4966b266 223
224 Int_t index = 0;
7e4131fc 225 Bool_t newEntry = kTRUE;
4966b266 226
227 // Defaults
4966b266 228 if (pdg == 0) {
0af12c00 229 index = fgkN - order;
7e4131fc 230 newEntry = kFALSE;
4966b266 231 }
232
233 // try to find existing entry
234 for (Int_t i=0; i<fCounter; i++) {
235 if (pdg == (Int_t)fParams[i][0] &&
236 order == (Int_t)fParams[i][1]) {
237
238 index = i;
7e4131fc 239 newEntry = kFALSE;
4966b266 240 }
241 }
242
243 // check fCounter
244
0af12c00 245 if (newEntry && (fCounter > fgkN-3)) {
4966b266 246 Error("AliAfterBurnerFlow","Overflow");
247 return;
248 }
249
250 if (newEntry) {
251 index = fCounter;
252 fCounter++;
253 }
254
255 // Set new particle type
256
257 fParams[index][0] = pdg;
258 fParams[index][1] = order;
7e4131fc 259 fParams[index][2] = type;
260 fParams[index][3] = v1;
261 fParams[index][4] = v2;
262 fParams[index][5] = v3;
263 fParams[index][6] = v4;
4966b266 264}
265
266////////////////////////////////////////////////////////////////////////////////////////////////////
267
f9f62d8e 268void AliGenAfterBurnerFlow::Init()
269{
4966b266 270 //
271 // Standard AliGenerator Initializer
272 //
273
f9f62d8e 274 if(fHow == 0) { Info("AliGenAfterBurnerFlow", "Using the Hijing R.P. Angle event by event "); }
275 else if(fHow == 1){ Info("AliGenAfterBurnerFlow", "Using a fixed R.P. Angle for every event ") ; }
276 else { Info("AliGenAfterBurnerFlow",
277 "Using a random R.P. Angle event by event ( ! not the same used by Hijing ! ) "); }
4966b266 278}
279
280////////////////////////////////////////////////////////////////////////////////////////////////////
281
f9f62d8e 282Float_t AliGenAfterBurnerFlow::GetCoefficient(Int_t pdg, Int_t n, Float_t Pt, Float_t Y) const
283{
4966b266 284 //
285 // private function
286 // Return Flow Coefficient for a given particle type flow order
287 // and particle momentum (Pt, Y)
288 //
289
f9f62d8e 290 Int_t index = fgkN - n; // default index (for all pdg)
4966b266 291 Float_t v = 0;
292
293 // try to find specific parametrs
294
295 for (Int_t i=0; i<fCounter; i++) {
4966b266 296 if ((Int_t)fParams[i][0] == pdg &&
297 (Int_t)fParams[i][1] == n) {
298
299 index = i;
300 break;
301 }
302 }
303
304 // calculate v
305
7e4131fc 306 Int_t type = (Int_t)fParams[index][2];
307
4966b266 308 if ((Int_t)fParams[index][1] == 1) { // Directed
7e4131fc 309
310 if (type == 0 )
311 v = fParams[index][3];
312 else
313 v = (fParams[index][3] + fParams[index][4] * Pt) * TMath::Sign((Float_t)1.,Y) *
314 (fParams[index][5] + fParams[index][6] * TMath::Abs(Y*Y*Y) );
4966b266 315
316 } else { // Elliptic
317
7e4131fc 318 if (type == 0) v = fParams[index][3];
319
320 // Pion parameterisation
7e4131fc 321 if (type == 1) {
322 if (Pt < fParams[index][4])
323 v = fParams[index][3] * (Pt / fParams[index][4]) ;
324 else
325 v = fParams[index][3];
326
327 v *= TMath::Exp( - fParams[index][5] * Y * Y);
328 }
329
330 // Old parameterisation
7e4131fc 331 if (type == 2)
332 v = (fParams[index][3] + fParams[index][4] * Pt * Pt) *
333 TMath::Exp( - fParams[index][5] * Y * Y);
f9f62d8e 334
335 // New v2 parameterisation
336 if (type == 3) {
337 v = (fParams[index][3] + fParams[index][4] *Pt + fParams[index][5] *Pt*Pt) *
338 TMath::Exp( - fParams[index][6] * Y*Y);
339 if (v<0)
340 v = 0;
341 }
4966b266 342 }
343
344 return v;
345}
346
347////////////////////////////////////////////////////////////////////////////////////////////////////
348
4a33c50d 349Float_t AliGenAfterBurnerFlow::GetNpNorm(Int_t npart) const
f9f62d8e 350{
351 //
352 // Calculate npart norm.
353 //
354
355 if (npart<0)
356 return 1;
357
358 Int_t order = (Int_t)fNpParams[0];
359 if (order<0)
360 return 1;
361
362 Float_t ret = 0;
363 Int_t npp = 1;
364 for (Int_t i=0; i<=order; i++) {
365 ret += npp*fNpParams[i+1];
366 npp *= npart;
367 }
368 return ret;
369}
370
371////////////////////////////////////////////////////////////////////////////////////////////////////
372
4a33c50d 373Bool_t AliGenAfterBurnerFlow::IsPrimary(Int_t pdg) const
f9f62d8e 374{
3a2811d4 375 if(pdg>=fgkPDG) return kFALSE;
f9f62d8e 376 return fIsPrim[pdg];
377}
378
379////////////////////////////////////////////////////////////////////////////////////////////////////
380
381Double_t CalcAngle(Double_t phi, Double_t phi0, Double_t phiRP, Double_t v2, Double_t v1=0.)
382{
4a33c50d 383 // Calculate relative angle
f9f62d8e 384 Double_t phi1 = phi-(phi+2*v1*TMath::Sin(phi-phiRP)+v2*TMath::Sin(2*(phi-phiRP))-phi0)/
385 (1.+2*v1*TMath::Cos(phi-phiRP)+ 2*v2*TMath::Cos(2*(phi-phiRP)));
386 if(TMath::Abs(phi/phi1-1.)<0.00001) return phi1;
387 return CalcAngle(phi1, phi0, phiRP, v2, v1);
388}
389
390////////////////////////////////////////////////////////////////////////////////////////////////////
391
392void AliGenAfterBurnerFlow::InitPrimaries()
393{
4a33c50d 394 // Init the primary particle list
f9f62d8e 395 for(Int_t i=0; i<fgkPDG; i++) fIsPrim[i]=kFALSE;
396
397 //mesons
398 fIsPrim[211]=kTRUE;
399 fIsPrim[311]=kTRUE;
400 fIsPrim[321]=kTRUE;
401 fIsPrim[411]=kTRUE;
402 fIsPrim[421]=kTRUE;
403 fIsPrim[431]=kTRUE;
404 fIsPrim[511]=kTRUE;
405 fIsPrim[521]=kTRUE;
406 fIsPrim[531]=kTRUE;
407 fIsPrim[541]=kTRUE;
408 fIsPrim[111]=kTRUE;
409 fIsPrim[221]=kTRUE;
410 fIsPrim[331]=kTRUE;
411 fIsPrim[441]=kTRUE;
412 fIsPrim[551]=kTRUE;
413 fIsPrim[130]=kTRUE;
414 fIsPrim[310]=kTRUE;
415 fIsPrim[213]=kTRUE;
416 fIsPrim[313]=kTRUE;
417 fIsPrim[323]=kTRUE;
418 fIsPrim[413]=kTRUE;
419 fIsPrim[423]=kTRUE;
420 fIsPrim[433]=kTRUE;
421 fIsPrim[513]=kTRUE;
422 fIsPrim[523]=kTRUE;
423 fIsPrim[533]=kTRUE;
424 fIsPrim[543]=kTRUE;
425 fIsPrim[113]=kTRUE;
426 fIsPrim[223]=kTRUE;
427 fIsPrim[333]=kTRUE;
428 fIsPrim[443]=kTRUE;
429 fIsPrim[553]=kTRUE;
430
431 //baryons
432 fIsPrim[2112]=kTRUE;
433 fIsPrim[2212]=kTRUE;
434 fIsPrim[3112]=kTRUE;
435 fIsPrim[3122]=kTRUE;
436 fIsPrim[3212]=kTRUE;
437 fIsPrim[3222]=kTRUE;
438 fIsPrim[3312]=kTRUE;
439 fIsPrim[3322]=kTRUE;
440 fIsPrim[4112]=kTRUE;
441 fIsPrim[4122]=kTRUE;
442 fIsPrim[4212]=kTRUE;
443 fIsPrim[4222]=kTRUE;
444 fIsPrim[4132]=kTRUE;
445 fIsPrim[4312]=kTRUE;
446 fIsPrim[4232]=kTRUE;
447 fIsPrim[4322]=kTRUE;
448 fIsPrim[4332]=kTRUE;
449 fIsPrim[5112]=kTRUE;
450 fIsPrim[5122]=kTRUE;
451 fIsPrim[5212]=kTRUE;
452 fIsPrim[5222]=kTRUE;
453 fIsPrim[1114]=kTRUE;
454 fIsPrim[2114]=kTRUE;
455 fIsPrim[2214]=kTRUE;
456 fIsPrim[2224]=kTRUE;
457 fIsPrim[3114]=kTRUE;
458 fIsPrim[3214]=kTRUE;
459 fIsPrim[3224]=kTRUE;
460 fIsPrim[3314]=kTRUE;
461 fIsPrim[3324]=kTRUE;
462 fIsPrim[3334]=kTRUE;
463 fIsPrim[4114]=kTRUE;
464 fIsPrim[4214]=kTRUE;
465 fIsPrim[4224]=kTRUE;
466 fIsPrim[4314]=kTRUE;
467 fIsPrim[4324]=kTRUE;
468 fIsPrim[4334]=kTRUE;
469 fIsPrim[5114]=kTRUE;
470 fIsPrim[5214]=kTRUE;
471 fIsPrim[5224]=kTRUE;
472}
473
474////////////////////////////////////////////////////////////////////////////////////////////////////
475
476void AliGenAfterBurnerFlow::Generate()
477{
4966b266 478 //
479 // AliGenerator generate function doing actual job.
480 // Algorythm:
481 //
f9f62d8e 482 // 1. loop over particles on the stack and choose primaries
483 // 2. calculate delta phi
484 // 3. change phi of primary particle and if it is non-stable
485 // then its daughters' phi and vertex also
4966b266 486 //
f9f62d8e 487 // For more details see :
488 // M.G. Poghosyan
489 // PWG2 meeting on 06.05.2008 and 03.06.2008
490
f9f62d8e 491
492 if (0)
493 for(Int_t ii=0; ii<fCounter;ii++)
494 {
495 printf("%d %f %f %f %f\n",ii,fParams[ii][0],fParams[ii][1],fParams[ii][2],fParams[ii][3]);
496 }
497
4966b266 498 AliGenCocktailAfterBurner *gen;
f9f62d8e 499
4966b266 500 TParticle *particle;
f9f62d8e 501 TParticle *particleM;
4966b266 502 TLorentzVector momentum;
f9f62d8e 503 TLorentzVector vertex;
4966b266 504
505 Int_t pdg;
f9f62d8e 506 Float_t phi;
4966b266 507 Float_t pt, y;
508
509 // Get Stack of the first Generator
f9f62d8e 510 // gen = (AliGenCocktailAfterBurner *)gAlice->Generator();
3e2e3ece 511 gen = (AliGenCocktailAfterBurner *)gAlice->GetMCApp()->Generator();
4966b266 512
cc41459d 513
514 AliGenerator* genHijing = 0 ;
515 AliCollisionGeometry* geom = 0 ;
516 AliGenCocktailEntry* entry = 0 ;
517 TList* fEntries = 0 ;
518
519 TRandom* rand = new TRandom(0) ;
cc41459d 520 for(Int_t ns=0;ns<gen->GetNumberOfEvents();ns++)
521 {
f9f62d8e 522 gen->SetActiveEventNumber(ns) ;
523
524 fStack = gen->GetStack(ns);
525 fEntries = gen->Entries() ;
526
527 TIter next(fEntries) ;
528 Int_t npart = -1;
cc41459d 529
cc41459d 530 if(fHow == 0) // hijing R.P.
531 {
f9f62d8e 532 while((entry = (AliGenCocktailEntry*)next()))
533 {
534 Info("Generate (e)","Using R.P. from HIJING ... ");
535 genHijing = entry->Generator() ;
536 if(genHijing->ProvidesCollisionGeometry())
537 {
538 geom = gen->GetCollisionGeometry(ns) ;
539 fReactionPlane = geom->ReactionPlaneAngle() ;
540 npart = geom->ProjectileParticipants() + geom->TargetParticipants();
541 break;
542 }
543 else
544 {
545 Error("Generate (e)", "NO CollisionGeometry !!! - using fixed R.P. angle = 0. ") ;
546 fReactionPlane = 0. ;
547 }
548 }
cc41459d 549 }
f9f62d8e 550 else if(fHow ==1 ) // fixed R.P.
cc41459d 551 {
f9f62d8e 552 Info("Generate (e)","Using fixed R.P. ...");
cc41459d 553 }
f9f62d8e 554 else
cc41459d 555 {
f9f62d8e 556 Info("Generate (e)","Using random R.P.s ... ");
557 fReactionPlane = 2 * TMath::Pi() * rand->Rndm() ;
cc41459d 558 }
f9f62d8e 559
560 cout << " * Reaction Plane Angle (event " << ns << ") = " << fReactionPlane <<
561 " rad. ( = " << (360*fReactionPlane/(2*TMath::Pi())) << " deg.) Npart = " << npart << "* " << endl ;
cc41459d 562
f9f62d8e 563 Int_t nParticles = fStack->GetNprimary();
564 for (Int_t i=0; i<nParticles; i++)
565 {
566 particle = fStack->Particle(i);
567
568 Int_t iM=particle->GetMother(0);
569 pdg = particle->GetPdgCode();
570
571 //exclude incoming protons in PYTHIA
572 if(particle->GetPdgCode()==21) continue;
573
3a2811d4 574 if(TMath::Abs(pdg)>=fgkPDG) continue;
f9f62d8e 575 // is particle primary?
576 if(!fIsPrim[TMath::Abs(pdg)]) continue;
577
578 if(iM>0)
579 {
580 particleM = fStack->Particle(iM);
581 Int_t pdgM = TMath::Abs(particleM->GetPdgCode());
582 // is mother primary?
583 if((TMath::Abs(pdgM)<fgkPDG)&&fIsPrim[TMath::Abs(pdgM)]) continue;
584 }
cc41459d 585
f9f62d8e 586 particle->Momentum(momentum);
587 phi = particle->Phi();
cc41459d 588
f9f62d8e 589 // get Pt, y
590 pt = momentum.Pt() ;
591 y = 10000.;
cc41459d 592
f9f62d8e 593 if(TMath::Abs(momentum.Z()) != TMath::Abs(momentum.T()))
594 y = momentum.Rapidity() ;
595
596 Double_t v1 = GetCoefficient(pdg, 1, pt, y);
597 Double_t v2 = GetCoefficient(pdg, 2, pt, y);
598 Double_t npartnorm = GetNpNorm(npart);
599 v2 *= npartnorm;
cc41459d 600
f9f62d8e 601 //printf("ntup %d %f %f %f %f %f\n ",npart, v1, v2, pt, y, npartnorm);
cc41459d 602
f9f62d8e 603 Double_t phi1 = CalcAngle(phi, phi, fReactionPlane,v2,v1);
cc41459d 604
f9f62d8e 605 Rotate(i, phi1-phi);
606 }
4966b266 607 }
608
7e4131fc 609 Info("Generate","Flow After Burner: DONE");
4966b266 610}
611
612////////////////////////////////////////////////////////////////////////////////////////////////////
613
f9f62d8e 614void AliGenAfterBurnerFlow::Rotate(Int_t i, Double_t phi, Bool_t IsPrim)
615{
4a33c50d 616 // Rotation
f9f62d8e 617 TParticle* particle = fStack->Particle(i);
618
619 TLorentzVector momentum;
620 particle->Momentum(momentum);
621 momentum.RotateZ(phi);
622 particle->SetMomentum(momentum);
623
624 if(!IsPrim)
625 {
626 TLorentzVector vertex;
627 particle->ProductionVertex(vertex);
628 vertex.RotateZ(phi);
629 particle->SetProductionVertex(vertex);
630 }
631
632 if(particle->GetFirstDaughter()<0) return;
633 for(Int_t iD=particle->GetFirstDaughter(); iD<=particle->GetLastDaughter(); iD++) Rotate(iD, phi, kFALSE);
634
635 return;
636}
637
638