change the formattin in Print()
[u/mrichter/AliRoot.git] / EVGEN / AliGenGeVSim.cxx
CommitLineData
7e4131fc 1
4966b266 2////////////////////////////////////////////////////////////////////////////////
3//
7e4131fc 4// AliGenGeVSim is a class implementing GeVSim event generator.
5//
6// GeVSim is a simple Monte-Carlo event generator for testing detector and
7// algorythm performance especialy concerning flow and event-by-event studies
4966b266 8//
9// In this event generator particles are generated from thermal distributions
10// without any dynamics and addicional constrains. Distribution parameters like
11// multiplicity, particle type yields, inverse slope parameters, flow coeficients
12// and expansion velocities are expleicite defined by the user.
13//
14// GeVSim contains four thermal distributions the same as
15// MevSim event generator developed for STAR experiment.
16//
7e4131fc 17// In addition custom distributions can be used be the mean
18// either two dimensional formula (TF2), a two dimensional histogram or
19// two one dimensional histograms.
4966b266 20//
21// Azimuthal distribution is deconvoluted from (Pt,Y) distribution
22// and is described by two Fourier coefficients representing
7e4131fc 23// Directed and Elliptic flow.
4966b266 24//
7e4131fc 25////////////////////////////////////////////////////////////////////////////////
26//
4966b266 27// To apply flow to event ganerated by an arbitraly event generator
28// refer to AliGenAfterBurnerFlow class.
29//
7e4131fc 30////////////////////////////////////////////////////////////////////////////////
31//
4966b266 32// For examples, parameters and testing macros refer to:
33// http:/home.cern.ch/radomski
7e4131fc 34//
35// for more detailed description refer to ALICE NOTE
36// "GeVSim Monte-Carlo Event Generator"
37// S.Radosmki, P. Foka.
4966b266 38//
39// Author:
40// Sylwester Radomski,
41// GSI, March 2002
42//
43// S.Radomski@gsi.de
44//
45////////////////////////////////////////////////////////////////////////////////
7e4131fc 46//
47// Updated and revised: September 2002, S. Radomski, GSI
48//
49////////////////////////////////////////////////////////////////////////////////
50
7816887f 51
b2ea1c9a 52#include <Riostream.h>
7816887f 53
54#include "TROOT.h"
55#include "TCanvas.h"
56#include "TParticle.h"
4966b266 57#include "TObjArray.h"
58#include "TF1.h"
59#include "TF2.h"
7e4131fc 60#include "TH1.h"
61#include "TH2.h"
4966b266 62
7816887f 63#include "AliRun.h"
64#include "AliPDG.h"
4966b266 65#include "AliGenerator.h"
66
67#include "AliGenGeVSim.h"
68#include "AliGeVSimParticle.h"
69
7816887f 70
71ClassImp(AliGenGeVSim);
72
73//////////////////////////////////////////////////////////////////////////////////
74
75AliGenGeVSim::AliGenGeVSim() : AliGenerator(-1) {
4966b266 76 //
77 // Default constructor
78 //
7816887f 79
7816887f 80 fPsi = 0;
7e4131fc 81 fIsMultTotal = kTRUE;
7816887f 82
83 //PH InitFormula();
7e4131fc 84 for (Int_t i=0; i<4; i++)
7816887f 85 fPtYFormula[i] = 0;
86}
87
88//////////////////////////////////////////////////////////////////////////////////
89
7e4131fc 90AliGenGeVSim::AliGenGeVSim(Float_t psi, Bool_t isMultTotal) : AliGenerator(-1) {
4966b266 91 //
92 // Standard Constructor.
93 //
7e4131fc 94 // models - thermal model to be used:
4966b266 95 // 1 - deconvoluted pt and Y source
96 // 2,3 - thermalized sphericaly symetric sources
97 // 4 - thermalized source with expansion
98 // 5 - custom model defined in TF2 object named "gevsimPtY"
7e4131fc 99 // 6 - custom model defined by two 1D histograms
100 // 7 - custom model defined by 2D histogram
4966b266 101 //
7e4131fc 102 // psi - reaction plane in degrees
103 // isMultTotal - multiplicity mode
104 // kTRUE - total multiplicity (default)
105 // kFALSE - dN/dY at midrapidity
106 //
7816887f 107
108 // checking consistancy
7e4131fc 109
4966b266 110 if (psi < 0 || psi > 360 )
111 Error ("AliGenGeVSim", "Reaction plane angle ( %d )out of range [0..360]", psi);
7816887f 112
4966b266 113 fPsi = psi * 2 * TMath::Pi() / 360. ;
7e4131fc 114 fIsMultTotal = isMultTotal;
7816887f 115
116 // initialization
117
118 fPartTypes = new TObjArray();
119 InitFormula();
7816887f 120}
121
122//////////////////////////////////////////////////////////////////////////////////
123
124AliGenGeVSim::~AliGenGeVSim() {
4966b266 125 //
126 // Default Destructor
127 //
128 // Removes TObjArray keeping list of registered particle types
129 //
7816887f 130
131 if (fPartTypes != NULL) delete fPartTypes;
132}
133
134
135//////////////////////////////////////////////////////////////////////////////////
136
137Bool_t AliGenGeVSim::CheckPtYPhi(Float_t pt, Float_t y, Float_t phi) {
4966b266 138 //
139 // private function used by Generate()
140 //
141 // Check bounds of Pt, Rapidity and Azimuthal Angle of a track
7e4131fc 142 // Used only when generating particles from a histogram
4966b266 143 //
7816887f 144
145 if ( TestBit(kPtRange) && ( pt < fPtMin || pt > fPtMax )) return kFALSE;
146 if ( TestBit(kPhiRange) && ( phi < fPhiMin || phi > fPhiMax )) return kFALSE;
147 if ( TestBit(kYRange) && ( y < fYMin || y > fYMax )) return kFALSE;
148
7816887f 149 return kTRUE;
150}
151
152//////////////////////////////////////////////////////////////////////////////////
153
7e4131fc 154Bool_t AliGenGeVSim::CheckAcceptance(Float_t p[3]) {
4966b266 155 //
156 // private function used by Generate()
157 //
7e4131fc 158 // Check bounds of a total momentum and theta of a track
4966b266 159 //
7816887f 160
7e4131fc 161 if ( TestBit(kThetaRange) ) {
162
163 Double_t theta = TMath::ATan2( TMath::Sqrt(p[0]*p[0]+p[1]*p[1]), p[2]);
164 if ( theta < fThetaMin || theta > fThetaMax ) return kFALSE;
165 }
166
7816887f 167
7e4131fc 168 if ( TestBit(kMomentumRange) ) {
169
170 Double_t momentum = TMath::Sqrt(p[0]*p[0] + p[1]*p[1] + p[2]*p[2]);
171 if ( momentum < fPMin || momentum > fPMax) return kFALSE;
172 }
7816887f 173
174 return kTRUE;
175}
176
177//////////////////////////////////////////////////////////////////////////////////
178
179void AliGenGeVSim::InitFormula() {
4966b266 180 //
181 // private function
182 //
183 // Initalizes formulas used in GeVSim.
184 // Manages strings and creates TFormula objects from strings
185 //
7816887f 186
187 // Deconvoluted Pt Y formula
188
189 // ptForm: pt -> x , mass -> [0] , temperature -> [1]
190 // y Form: y -> x , sigmaY -> [0]
191
192 const char* ptForm = " x * exp( -sqrt([0]*[0] + x*x) / [1] )";
193 const char* yForm = " exp ( - x*x / (2 * [0]*[0] ) )";
194
195 fPtFormula = new TF1("gevsimPt", ptForm, 0, 3);
196 fYFormula = new TF1("gevsimRapidity", yForm, -3, 3);
197
7e4131fc 198 fPtFormula->SetParNames("mass", "temperature");
7816887f 199 fPtFormula->SetParameters(1., 1.);
200
7e4131fc 201 fYFormula->SetParName(0, "sigmaY");
7816887f 202 fYFormula->SetParameter(0, 1.);
203
204 // Grid for Pt and Y
205 fPtFormula->SetNpx(100);
206 fYFormula->SetNpx(100);
207
208
209 // Models 1-3
210
211 // pt -> x , Y -> y
212 // mass -> [0] , temperature -> [1] , expansion velocity -> [2]
213
214
215 const char *formE = " ( sqrt([0]*[0] + x*x) * cosh(y) ) ";
216 const char *formG = " ( 1 / sqrt( 1 - [2]*[2] ) ) ";
4966b266 217 const char *formYp = "( [2]*sqrt(([0]*[0]+x*x)*cosh(y)*cosh(y)-[0]*[0])/([1]*sqrt(1-[2]*[2]))) ";
7816887f 218
219 const char* formula[3] = {
220 " x * %s * exp( -%s / [1]) ",
221 " (x * %s) / ( exp( %s / [1]) - 1 ) ",
4966b266 222 " x*%s*exp(-%s*%s/[1])*((sinh(%s)/%s)+([1]/(%s*%s))*(sinh(%s)/%s-cosh(%s)))"
7816887f 223 };
224
7e4131fc 225 const char* paramNames[3] = {"mass", "temperature", "expVel"};
7816887f 226
227 char buffer[1024];
228
229 sprintf(buffer, formula[0], formE, formE);
7e4131fc 230 fPtYFormula[0] = new TF2("gevsimPtY_2", buffer, 0, 3, -2, 2);
7816887f 231
232 sprintf(buffer, formula[1], formE, formE);
7e4131fc 233 fPtYFormula[1] = new TF2("gevsimPtY_3", buffer, 0, 3, -2, 2);
7816887f 234
235 sprintf(buffer, formula[2], formE, formG, formE, formYp, formYp, formG, formE, formYp, formYp, formYp);
7e4131fc 236 fPtYFormula[2] = new TF2("gevsimPtY_4", buffer, 0, 3, -2, 2);
7816887f 237
238 fPtYFormula[3] = 0;
239
240
241 // setting names & initialisation
242
243 Int_t i, j;
244 for (i=0; i<3; i++) {
245
7e4131fc 246 fPtYFormula[i]->SetNpx(100); // step 30 MeV
247 fPtYFormula[i]->SetNpy(100); //
7816887f 248
249 for (j=0; j<3; j++) {
250
251 if ( i != 2 && j == 2 ) continue; // ExpVel
252 fPtYFormula[i]->SetParName(j, paramNames[j]);
253 fPtYFormula[i]->SetParameter(j, 0.5);
254 }
255 }
256
257 // Phi Flow Formula
258
259 // phi -> x
260 // Psi -> [0] , Direct Flow -> [1] , Ellipticla Flow -> [2]
261
262 const char* phiForm = " 1 + 2*[1]*cos(x-[0]) + 2*[2]*cos(2*(x-[0])) ";
263 fPhiFormula = new TF1("gevsimPhi", phiForm, 0, 2*TMath::Pi());
264
7e4131fc 265 fPhiFormula->SetParNames("psi", "directed", "elliptic");
266 fPhiFormula->SetParameters(0., 0., 0.);
7816887f 267
7e4131fc 268 fPhiFormula->SetNpx(180);
7816887f 269
270}
271
272//////////////////////////////////////////////////////////////////////////////////
273
274void AliGenGeVSim::AddParticleType(AliGeVSimParticle *part) {
4966b266 275 //
276 // Adds new type of particles.
277 //
278 // Parameters are defeined in AliGeVSimParticle object
279 // This method has to be called for every particle type
280 //
7816887f 281
282 if (fPartTypes == NULL)
283 fPartTypes = new TObjArray();
284
285 fPartTypes->Add(part);
7e4131fc 286}
287
288//////////////////////////////////////////////////////////////////////////////////
7816887f 289
7e4131fc 290void AliGenGeVSim::SetMultTotal(Bool_t isTotal) {
291 //
292 //
293 //
294
295 fIsMultTotal = isTotal;
7816887f 296}
297
298//////////////////////////////////////////////////////////////////////////////////
299
300Float_t AliGenGeVSim::FindScaler(Int_t paramId, Int_t pdg) {
4966b266 301 //
302 // private function
303 // Finds Scallar for a given parameter.
304 // Function used in event-by-event mode.
305 //
306 // There are two types of scallars: deterministic and random
307 // and they can work on either global or particle type level.
308 // For every variable there are four scallars defined.
309 //
310 // Scallars are named as folowa
311 // deterministic global level : "gevsimParam" (eg. "gevsimTemp")
312 // deterinistig type level : "gevsimPdgParam" (eg. "gevsim211Mult")
313 // random global level : "gevsimParamRndm" (eg. "gevsimMultRndm")
314 // random type level : "gevsimPdgParamRndm" (eg. "gevsim-211V2Rndm");
315 //
316 // Pdg - code of a particle type in PDG standard (see: http://pdg.lbl.gov)
317 // Param - parameter name. Allowed parameters:
318 //
319 // "Temp" - inverse slope parameter
320 // "SigmaY" - rapidity width - for model (1) only
321 // "ExpVel" - expansion velocity - for model (4) only
322 // "V1" - directed flow
323 // "V2" - elliptic flow
324 // "Mult" - multiplicity
325 //
326
327
7816887f 328 static const char* params[] = {"Temp", "SigmaY", "ExpVel", "V1", "V2", "Mult"};
329 static const char* ending[] = {"", "Rndm"};
330
331 static const char* patt1 = "gevsim%s%s";
332 static const char* patt2 = "gevsim%d%s%s";
333
334 char buffer[80];
335 TF1 *form;
336
337 Float_t scaler = 1.;
338
339 // Scaler evoluation: i - global/local, j - determ/random
340
341 Int_t i, j;
342
343 for (i=0; i<2; i++) {
344 for (j=0; j<2; j++) {
345
346 form = 0;
347
348 if (i == 0) sprintf(buffer, patt1, params[paramId], ending[j]);
349 else sprintf(buffer, patt2, pdg, params[paramId], ending[j]);
350
351 form = (TF1 *)gROOT->GetFunction(buffer);
352
353 if (form != 0) {
354 if (j == 0) scaler *= form->Eval(gAlice->GetEvNumber());
355 if (j == 1) {
356 form->SetParameter(0, gAlice->GetEvNumber());
357 scaler *= form->GetRandom();
358 }
359 }
360 }
361 }
362
363 return scaler;
364}
365
366//////////////////////////////////////////////////////////////////////////////////
367
4966b266 368void AliGenGeVSim::DetermineReactionPlane() {
369 //
370 // private function used by Generate()
371 //
372 // Retermines Reaction Plane angle and set this value
373 // as a parameter [0] in fPhiFormula
374 //
375 // Note: if "gevsimPsiRndm" function is found it override both
376 // "gevsimPhi" function and initial fPsi value
377 //
378
379 TF1 *form;
380
381 form = 0;
382 form = (TF1 *)gROOT->GetFunction("gevsimPsi");
7e4131fc 383 if (form) fPsi = form->Eval(gAlice->GetEvNumber());
4966b266 384
7e4131fc 385 form = 0;
4966b266 386 form = (TF1 *)gROOT->GetFunction("gevsimPsiRndm");
7e4131fc 387 if (form) fPsi = form->GetRandom();
4966b266 388
389 fPhiFormula->SetParameter(0, fPsi);
390}
391
392//////////////////////////////////////////////////////////////////////////////////
393
7e4131fc 394Float_t AliGenGeVSim::GetdNdYToTotal() {
4966b266 395 //
7e4131fc 396 // Private, helper function used by Generate()
4966b266 397 //
7e4131fc 398 // Returns total multiplicity to dN/dY ration using current distribution.
399 // The function have to be called after setting distribution and its
400 // parameters (like temperature).
401 //
402
403 Float_t integ, mag;
404 const Double_t maxPt = 3.0, maxY = 2.;
405
406 if (fModel == 1) {
407
408 integ = fYFormula->Integral(-maxY, maxY);
409 mag = fYFormula->Eval(0);
410 return integ/mag;
411 }
412
413 // 2D formula standard or custom
414
415 if (fModel > 1 && fModel < 6) {
416
417 integ = ((TF2*)fCurrentForm)->Integral(0,maxPt, -maxY, maxY);
418 mag = ((TF2*)fCurrentForm)->Integral(0, maxPt, -0.1, 0.1) / 0.2;
419 return integ/mag;
420 }
421
422 // 2 1D histograms
423
424 if (fModel == 6) {
425
426 integ = fHist[1]->Integral();
427 mag = fHist[0]->GetBinContent(fHist[0]->FindBin(0.));
428 mag /= fHist[0]->GetBinWidth(fHist[0]->FindBin(0.));
429 return integ/mag;
430 }
431
432 // 2D histogram
4966b266 433
7e4131fc 434 if (fModel == 7) {
435
436 // Not tested ...
437 Int_t yBins = fPtYHist->GetNbinsY();
438 Int_t ptBins = fPtYHist->GetNbinsX();
439
440 integ = fPtYHist->Integral(0, ptBins, 0, yBins);
441 mag = fPtYHist->Integral(0, ptBins, (yBins/2)-1, (yBins/2)+1 ) / 2;
442 return integ/mag;
443 }
444
445 return 1;
4966b266 446}
447
448//////////////////////////////////////////////////////////////////////////////////
449
7e4131fc 450void AliGenGeVSim::SetFormula(Int_t pdg) {
4966b266 451 //
7e4131fc 452 // Private function used by Generate()
4966b266 453 //
7e4131fc 454 // Configure a formula for a given particle type and model Id (in fModel).
455 // If custom formula or histogram was selected the function tries
456 // to find it.
457 //
458 // The function implements naming conventions for custom distributions names
459 //
7816887f 460
7e4131fc 461 char buff[40];
462 const char* msg[4] = {
463 "Custom Formula for Pt Y distribution not found [pdg = %d]",
464 "Histogram for Pt distribution not found [pdg = %d]",
465 "Histogram for Y distribution not found [pdg = %d]",
466 "HIstogram for Pt Y dostribution not found [pdg = %d]"
467 };
468
469 const char* pattern[8] = {
470 "gevsimDistPtY", "gevsimDist%dPtY",
471 "gevsimHistPt", "gevsimHist%dPt",
472 "gevsimHistY", "gevsimHist%dY",
473 "gevsimHistPtY", "gevsimHist%dPtY"
474 };
475
476 const char *where = "SetFormula";
7816887f 477
7816887f 478
7e4131fc 479 if (fModel < 1 || fModel > 7)
480 Error("SetFormula", "Model Id (%d) out of range [1-7]", fModel);
481
482
483 // standard models
484
485 if (fModel == 1) fCurrentForm = fPtFormula;
486 if (fModel > 1 && fModel < 5) fCurrentForm = fPtYFormula[fModel-2];
487
488
489 // custom model defined by a formula
490
7816887f 491 if (fModel == 5) {
492
7e4131fc 493 fCurrentForm = 0;
494 fCurrentForm = (TF2*)gROOT->GetFunction(pattern[0]);
495
496 if (!fCurrentForm) {
497
498 sprintf(buff, pattern[1], pdg);
499 fCurrentForm = (TF2*)gROOT->GetFunction(buff);
500
501 if (!fCurrentForm) Error(where, msg[0], pdg);
502 }
503 }
504
505 // 2 1D histograms
506
507 if (fModel == 6) {
7816887f 508
7e4131fc 509 for (Int_t i=0; i<2; i++) {
7816887f 510
7e4131fc 511 fHist[i] = 0;
512 fHist[i] = (TH1D*)gROOT->FindObject(pattern[2+2*i]);
513
514 if (!fHist[i]) {
515
516 sprintf(buff, pattern[3+2*i], pdg);
517 fHist[i] = (TH1D*)gROOT->FindObject(buff);
518
519 if (!fHist[i]) Error(where, msg[1+i], pdg);
520 }
521 }
7816887f 522 }
7e4131fc 523
524 // 2d histogram
525
526 if (fModel == 7) {
527
528 fPtYHist = 0;
529 fPtYHist = (TH2D*)gROOT->FindObject(pattern[6]);
530
531 if (!fPtYHist) {
532
533 sprintf(buff, pattern[7], pdg);
534 fPtYHist = (TH2D*)gROOT->FindObject(buff);
535 }
536
e760b04a 537 if (!fPtYHist) Error(where, msg[3], pdg);
7e4131fc 538 }
539
540}
541
542//////////////////////////////////////////////////////////////////////////////////
543
544void AliGenGeVSim:: AdjustFormula() {
545 //
546 // Private Function
547 // Adjust fomula bounds according to acceptance cuts.
548 //
549 // Since GeVSim is producing "thermal" particles Pt
550 // is cut at 3 GeV even when acceptance extends to grater momenta.
551 //
552 // WARNING !
553 // If custom formula was provided function preserves
554 // original cuts.
555 //
556
557 const Double_t kMaxPt = 3.0;
558 const Double_t kMaxY = 2.0;
559 Double_t minPt, maxPt, minY, maxY;
560
561
562 if (fModel > 4) return;
563
564 // max Pt
565 if (TestBit(kPtRange) && fPtMax < kMaxPt ) maxPt = fPtMax;
566 else maxPt = kMaxPt;
567
568 // min Pt
569 if (TestBit(kPtRange)) minPt = fPtMin;
570 else minPt = 0;
571
572 if (TestBit(kPtRange) && fPtMin > kMaxPt )
573 Warning("Acceptance", "Minimum Pt (%3.2f GeV) greater that 3.0 GeV ", fPtMin);
574
575 // Max Pt < Max P
576 if (TestBit(kMomentumRange) && fPtMax < maxPt) maxPt = fPtMax;
577
578 // max and min rapidity
579 if (TestBit(kYRange)) {
580 minY = fYMin;
581 maxY = fYMax;
582 } else {
583 minY = -kMaxY;
584 maxY = kMaxY;
585 }
586
587 // adjust formula
588
589 if (fModel == 1) {
590 fPtFormula->SetRange(fPtMin, maxPt);
591 fYFormula->SetRange(fYMin, fYMax);
592 }
593
594 if (fModel > 1)
595 ((TF2*)fCurrentForm)->SetRange(minPt, minY, maxPt, maxY);
596
597 // azimuthal cut
598
599 if (TestBit(kPhiRange))
600 fPhiFormula->SetRange(fPhiMin, fPhiMax);
601
602}
603
604//////////////////////////////////////////////////////////////////////////////////
605
606void AliGenGeVSim::GetRandomPtY(Double_t &pt, Double_t &y) {
607 //
608 // Private function used by Generate()
609 //
610 // Returns random values of Pt and Y corresponding to selected
611 // distribution.
612 //
613
614 if (fModel == 1) {
615 pt = fPtFormula->GetRandom();
616 y = fYFormula->GetRandom();
617 return;
618 }
619
620 if (fModel > 1 && fModel < 6) {
621 ((TF2*)fCurrentForm)->GetRandom2(pt, y);
622 return;
623 }
624
625 if (fModel == 6) {
626 pt = fHist[0]->GetRandom();
627 y = fHist[1]->GetRandom();
628 }
629
630 if (fModel == 7) {
631 fPtYHist->GetRandom2(pt, y);
632 return;
633 }
634}
635
636//////////////////////////////////////////////////////////////////////////////////
637
638void AliGenGeVSim::Init() {
639 //
640 // Standard AliGenerator initializer.
641 // does nothing
642 //
7816887f 643}
644
645//////////////////////////////////////////////////////////////////////////////////
646
647void AliGenGeVSim::Generate() {
4966b266 648 //
649 // Standard AliGenerator function
650 // This function do actual job and puts particles on stack.
651 //
7816887f 652
7816887f 653 PDG_t pdg; // particle type
654 Float_t mass; // particle mass
655 Float_t orgin[3] = {0,0,0}; // particle orgin [cm]
656 Float_t polar[3] = {0,0,0}; // polarisation
7816887f 657 Float_t time = 0; // time of creation
7816887f 658
7e4131fc 659 Float_t multiplicity = 0;
660 Bool_t isMultTotal = kTRUE;
661
7816887f 662 Float_t paramScaler;
7e4131fc 663 Float_t directedScaller = 1., ellipticScaller = 1.;
664
665 TLorentzVector *v = new TLorentzVector(0,0,0,0);
7816887f 666
4966b266 667 const Int_t kParent = -1;
7816887f 668 Int_t id;
669
7816887f 670 // vertexing
7816887f 671 VertexInternal();
7816887f 672 orgin[0] = fVertex[0];
673 orgin[1] = fVertex[1];
674 orgin[2] = fVertex[2];
675
7816887f 676
677 // Particle params database
678
679 TDatabasePDG *db = TDatabasePDG::Instance();
680 TParticlePDG *type;
681 AliGeVSimParticle *partType;
682
683 Int_t nType, nParticle, nParam;
7e4131fc 684 const Int_t nParams = 6;
7816887f 685
4966b266 686 // reaction plane determination and model
4966b266 687 DetermineReactionPlane();
7e4131fc 688
7816887f 689 // loop over particle types
690
691 for (nType = 0; nType < fPartTypes->GetEntries(); nType++) {
692
693 partType = (AliGeVSimParticle *)fPartTypes->At(nType);
694
695 pdg = (PDG_t)partType->GetPdgCode();
696 type = db->GetParticle(pdg);
697 mass = type->Mass();
698
7e4131fc 699 fModel = partType->GetModel();
700 SetFormula(pdg);
701 fCurrentForm->SetParameter("mass", mass);
7816887f 702
7816887f 703
704 // Evaluation of parameters - loop over parameters
705
7e4131fc 706 for (nParam = 0; nParam < nParams; nParam++) {
7816887f 707
708 paramScaler = FindScaler(nParam, pdg);
709
7e4131fc 710 if (nParam == 0)
711 fCurrentForm->SetParameter("temperature", paramScaler * partType->GetTemperature());
7816887f 712
713 if (nParam == 1 && fModel == 1)
7e4131fc 714 fYFormula->SetParameter("sigmaY", paramScaler * partType->GetSigmaY());
7816887f 715
716 if (nParam == 2 && fModel == 4) {
717
7e4131fc 718 Double_t totalExpVal = paramScaler * partType->GetExpansionVelocity();
7816887f 719
720 if (totalExpVal == 0.0) totalExpVal = 0.0001;
721 if (totalExpVal == 1.0) totalExpVal = 9.9999;
722
7e4131fc 723 fCurrentForm->SetParameter("expVel", totalExpVal);
7816887f 724 }
725
726 // flow
7e4131fc 727
728 if (nParam == 3) directedScaller = paramScaler;
729 if (nParam == 4) ellipticScaller = paramScaler;
7816887f 730
731 // multiplicity
7e4131fc 732
733 if (nParam == 5) {
734
735 if (partType->IsMultForced()) isMultTotal = partType->IsMultTotal();
736 else isMultTotal = fIsMultTotal;
7816887f 737
7e4131fc 738 multiplicity = paramScaler * partType->GetMultiplicity();
739 multiplicity *= (isMultTotal)? 1 : GetdNdYToTotal();
740 }
7816887f 741 }
742
7e4131fc 743 // Flow defined on the particle type level (not parameterised)
744 if (partType->IsFlowSimple()) {
745 fPhiFormula->SetParameter(1, partType->GetDirectedFlow(0,0) * directedScaller);
746 fPhiFormula->SetParameter(2, partType->GetEllipticFlow(0,0) * ellipticScaller);
747 }
748
749 AdjustFormula();
750
751
752 Info("Generate","PDG = %d \t Mult = %d", pdg, (Int_t)multiplicity);
7816887f 753
754 // loop over particles
755
756 nParticle = 0;
7816887f 757 while (nParticle < multiplicity) {
758
7e4131fc 759 Double_t pt, y, phi; // momentum in [pt,y,phi]
760 Float_t p[3] = {0,0,0}; // particle momentum
7816887f 761
7e4131fc 762 GetRandomPtY(pt, y);
7816887f 763
7e4131fc 764 // phi distribution configuration when differential flow defined
765 // to be optimised in future release
7816887f 766
7e4131fc 767 if (!partType->IsFlowSimple()) {
768 fPhiFormula->SetParameter(1, partType->GetDirectedFlow(pt,y) * directedScaller);
769 fPhiFormula->SetParameter(2, partType->GetEllipticFlow(pt,y) * ellipticScaller);
770 }
7816887f 771
7e4131fc 772 phi = fPhiFormula->GetRandom();
7816887f 773
7e4131fc 774 if (!isMultTotal) nParticle++;
775 if (fModel > 4 && !CheckPtYPhi(pt,y,phi) ) continue;
776
7816887f 777 // coordinate transformation
7816887f 778 v->SetPtEtaPhiM(pt, y, phi, mass);
779
780 p[0] = v->Px();
781 p[1] = v->Py();
782 p[2] = v->Pz();
783
784 // momentum range test
7e4131fc 785 if ( !CheckAcceptance(p) ) continue;
7816887f 786
787 // putting particle on the stack
788
7e4131fc 789 SetTrack(fTrackIt, kParent, pdg, p, orgin, polar, time, kPPrimary, id, fTrackIt);
790 if (isMultTotal) nParticle++;
7816887f 791 }
792 }
7e4131fc 793
794 delete v;
7816887f 795}
796
797//////////////////////////////////////////////////////////////////////////////////