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Added setting for HF jet cuts
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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// Generator using AMPT as an external generator
19
20#include "AliGenAmpt.h"
21
22#include <TClonesArray.h>
23#include <TGraph.h>
24#include <TAmpt.h>
25#include <TLorentzVector.h>
26#include <TPDGCode.h>
27#include <TParticle.h>
28#include <TVirtualMC.h>
29#include <TParticlePDG.h>
30#include "AliGenHijingEventHeader.h"
31#define AliGenAmptEventHeader AliGenHijingEventHeader
32#include "AliAmptRndm.h"
33#include "AliLog.h"
34#include "AliRun.h"
35#include "AliDecayer.h"
36
37ClassImp(AliGenAmpt)
38
39AliGenAmpt::AliGenAmpt()
40 : AliGenMC(),
41 fDecayer(NULL),
42 fFrame("CMS"),
43 fMinImpactParam(0.),
44 fMaxImpactParam(5.),
45 fKeep(0),
46 fQuench(0),
47 fShadowing(1),
48 fDecaysOff(1),
49 fTrigger(0),
50 fEvaluate(0),
51 fSelectAll(0),
52 fFlavor(0),
53 fKineBias(0.),
54 fTrials(0),
55 fXsection(0.),
56 fAmpt(0),
57 fPtHardMin(2.0),
58 fPtHardMax(-1),
59 fSpectators(1),
60 fDsigmaDb(0),
61 fDnDb(0),
62 fPtMinJet(-2.5),
63 fEtaMinJet(-20.),
64 fEtaMaxJet(+20.),
65 fPhiMinJet(0.),
66 fPhiMaxJet(TMath::TwoPi()),
67 fRadiation(3),
68 fSimpleJet(kFALSE),
69 fNoGammas(kFALSE),
70 fProjectileSpecn(0),
71 fProjectileSpecp(0),
72 fTargetSpecn(0),
73 fTargetSpecp(0),
74 fLHC(kFALSE),
75 fRandomPz(kFALSE),
76 fNoHeavyQuarks(kFALSE),
77 fIsoft(4),
78 fNtMax(150),
79 fIpop(1),
80 fXmu(3.2264),
81 fAlpha(1./3),
82 fStringA(0.5),
83 fStringB(0.9),
84 fEventTime(0.),
85 fHeader(new AliGenAmptEventHeader("Ampt")),
86 fDecay(kTRUE),
87 fRotating(kFALSE)
88{
89 // Constructor
90 fEnergyCMS = 2760.;
91 AliAmptRndm::SetAmptRandom(GetRandom());
92}
93
94AliGenAmpt::AliGenAmpt(Int_t npart)
95 : AliGenMC(npart),
96 fDecayer(NULL),
97 fFrame("CMS"),
98 fMinImpactParam(0.),
99 fMaxImpactParam(5.),
100 fKeep(0),
101 fQuench(0),
102 fShadowing(1),
103 fDecaysOff(1),
104 fTrigger(0),
105 fEvaluate(0),
106 fSelectAll(0),
107 fFlavor(0),
108 fKineBias(0.),
109 fTrials(0),
110 fXsection(0.),
111 fAmpt(0),
112 fPtHardMin(2.0),
113 fPtHardMax(-1),
114 fSpectators(1),
115 fDsigmaDb(0),
116 fDnDb(0),
117 fPtMinJet(-2.5),
118 fEtaMinJet(-20.),
119 fEtaMaxJet(+20.),
120 fPhiMinJet(0.),
121 fPhiMaxJet(2. * TMath::Pi()),
122 fRadiation(3),
123 fSimpleJet(kFALSE),
124 fNoGammas(kFALSE),
125 fProjectileSpecn(0),
126 fProjectileSpecp(0),
127 fTargetSpecn(0),
128 fTargetSpecp(0),
129 fLHC(kFALSE),
130 fRandomPz(kFALSE),
131 fNoHeavyQuarks(kFALSE),
132 fIsoft(1),
133 fNtMax(150),
134 fIpop(1),
135 fXmu(3.2264),
136 fAlpha(1./3),
137 fStringA(0.5),
138 fStringB(0.9),
139 fEventTime(0.),
140 fHeader(new AliGenAmptEventHeader("Ampt")),
141 fDecay(kTRUE),
142 fRotating(kFALSE)
143{
144 // Default PbPb collisions at 2.76 TeV
145
146 fEnergyCMS = 2760.;
147 fName = "Ampt";
148 fTitle= "Particle Generator using AMPT";
149 AliAmptRndm::SetAmptRandom(GetRandom());
150}
151
152AliGenAmpt::~AliGenAmpt()
153{
154 // Destructor
155 if ( fDsigmaDb) delete fDsigmaDb;
156 if ( fDnDb) delete fDnDb;
157 if ( fHeader) delete fHeader;
158}
159
160void AliGenAmpt::Init()
161{
162 // Initialisation
163
164 fFrame.Resize(8);
165 fTarget.Resize(8);
166 fProjectile.Resize(8);
167
168 fAmpt = new TAmpt(fEnergyCMS, fFrame, fProjectile, fTarget,
169 fAProjectile, fZProjectile, fATarget, fZTarget,
170 fMinImpactParam, fMaxImpactParam);
171 SetMC(fAmpt);
172
173 fAmpt->SetIHPR2(2, fRadiation);
174 fAmpt->SetIHPR2(3, fTrigger);
175 fAmpt->SetIHPR2(6, fShadowing);
176 fAmpt->SetIHPR2(12, fDecaysOff);
177 fAmpt->SetIHPR2(21, fKeep);
178 fAmpt->SetHIPR1(8, fPtHardMin);
179 fAmpt->SetHIPR1(9, fPtHardMax);
180 fAmpt->SetHIPR1(10, fPtMinJet);
181 fAmpt->SetHIPR1(50, fSimpleJet);
182
183 // Quenching
184 // fQuench = 0: no quenching
185 // fQuench = 1: Hijing default
186 // fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14)
187 // fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14)
188 // fQuench = 4: new LHC parameters with log(e) dependence
189 // fQuench = 5: new RHIC parameters with log(e) dependence
190 fAmpt->SetIHPR2(50, 0);
191 if (fQuench > 0)
192 fAmpt->SetIHPR2(4, 1);
193 else
194 fAmpt->SetIHPR2(4, 0);
195
196 if (fQuench == 2) {
197 fAmpt->SetHIPR1(14, 1.1);
198 fAmpt->SetHIPR1(11, 3.7);
199 } else if (fQuench == 3) {
200 fAmpt->SetHIPR1(14, 0.20);
201 fAmpt->SetHIPR1(11, 2.5);
202 } else if (fQuench == 4) {
203 fAmpt->SetIHPR2(50, 1);
204 fAmpt->SetHIPR1(14, 4.*0.34);
205 fAmpt->SetHIPR1(11, 3.7);
206 } else if (fQuench == 5) {
207 fAmpt->SetIHPR2(50, 1);
208 fAmpt->SetHIPR1(14, 0.34);
209 fAmpt->SetHIPR1(11, 2.5);
210 }
211
212 // Heavy quarks
213 if (fNoHeavyQuarks) {
214 fAmpt->SetIHPR2(49, 1);
215 } else {
216 fAmpt->SetIHPR2(49, 0);
217 }
218
219 // Ampt specific
220 fAmpt->SetIsoft(fIsoft);
221 fAmpt->SetNtMax(fNtMax);
222 fAmpt->SetIpop(fIpop);
223 fAmpt->SetXmu(fXmu);
224 fAmpt->SetAlpha(fAlpha);
225 fAmpt->SetStringFrag(fStringA, fStringB);
226
227 AliGenMC::Init();
228
229 // Initialize Ampt
230 fAmpt->Initialize();
231 if (fEvaluate)
232 EvaluateCrossSections();
233
234 fAmpt->SetReactionPlaneAngle(0.0);
235 fRotating=kFALSE;
236}
237
238void AliGenAmpt::Generate()
239{
240 // Generate one event
241
242 Float_t polar[3] = {0,0,0};
243 Float_t origin[3] = {0,0,0};
244 Float_t origin0[3] = {0,0,0};
245 Float_t time0 = 0.;
246 Float_t p[3];
247 Float_t tof;
248
249 Int_t nt = 0;
250 Int_t jev = 0;
251 Int_t j, kf, ks, ksp, imo;
252 kf = 0;
253
254 fTrials = 0;
255 for (j = 0;j < 3; j++)
256 origin0[j] = fOrigin[j];
257 //time0 = fTimeOrigin;
258
259 if(fVertexSmear == kPerEvent) {
260 Vertex();
261 for (j=0; j < 3; j++)
262 origin0[j] = fVertex[j];
263 //time0 = fTime;
264 }
265
266 Float_t sign = (fRandomPz && (Rndm() < 0.5))? -1. : 1.;
267
268 while(1) {
269
270 // Generate random reaction plane angle if requested
271 if( fRotating ) {
272 TRandom *r=AliAmptRndm::GetAmptRandom();
273 fAmpt->SetReactionPlaneAngle(TMath::TwoPi()*r->Rndm());
274 }
275
276 // Generate one event
277 Int_t fpemask = gSystem->GetFPEMask();
278 gSystem->SetFPEMask(0);
279 fAmpt->GenerateEvent();
280 gSystem->SetFPEMask(fpemask);
281 fTrials++;
282 fNprimaries = 0;
283
284
285 fAmpt->ImportParticles(&fParticles,"All");
286 Int_t np = fParticles.GetEntriesFast();
287 if (np == 0 )
288 continue;
289 //
290 //RS>>: Decayers now returns cm and sec. Since TAmpt returns mm and mm/c, convert its result to cm and sec here
291 const Float_t kconvT=0.001/2.999792458e8; // mm/c to seconds conversion
292 const Float_t kconvL=1./10; // mm to cm conversion
293 for (int ip=np;ip--;) {
294 TParticle* part = (TParticle*)fParticles[ip];
295 if (!part) continue;
296 part->SetProductionVertex(part->Vx()*kconvL,part->Vy()*kconvL,part->Vz()*kconvL,kconvT*part->T());
297 }
298 // RS<<
299 //
300 if (fTrigger != kNoTrigger) {
301 if (!CheckTrigger())
302 continue;
303 }
304
305 AliDecayer *decayer = 0;
306 //if (gMC)
307 // decayer = gMC->GetDecayer();
308 decayer = fDecayer; //AMPT does not do the strong decays per dafault
309
310 if (decayer&&fDecay) {
311 TClonesArray arr("TParticle",100);
312 for( Int_t nLoop=0; nLoop!=2; ++nLoop) { // In order to produce more than one generation of decays: NumberOfNestedLoops set to 2
313 Int_t np2 = np;
314 for (Int_t i = 0; i < np; i++) {
315 TParticle *iparticle = (TParticle *)fParticles.At(i);
316 if (!Stable(iparticle)) // true if particle has daughters already
317 continue;
318 kf = TMath::Abs(iparticle->GetPdgCode());
319 if (kf==92)
320 continue;
321 if( !IsThisAKnownParticle(iparticle) ) continue; // skip undesired particles
322 /*
323 if (0) { // this turned out to be too cumbersome!
324 if (kf!=331&&kf!=3114&&kf!=3114&&kf!=411&&kf!=-4122&&kf!=-3324&&kf!=-3312&&kf!=-3114&&
325 kf!=-311&&kf!=3214&&kf!=-3214&&kf!=-433&&kf!=413&&kf!=3122&&kf!=-3122&&kf!=-413&&
326 kf!=-421&&kf!=-423&&kf!=3324&&kf!=-313&&kf!=213&&kf!=-213&&kf!=3314&&kf!=3222&&
327 kf!=-3222&&kf!=3224&&kf!=-3224&&kf!=-4212&&kf!=4212&&kf!=433&&kf!=423&&kf!=-3322&&
328 kf!=3322&&kf!=-3314)
329 continue; //decay eta',Sigma*+,Sigma*-,D+,Lambda_c-,Xi*0_bar,Xi-_bar,Sigma*-,
330 // K0_bar,Sigma*0,Sigma*0_bar,D*_s-,D*+,Lambda0,Lambda0_bar,D*-
331 // D0_bar,D*0_bar,Xi*0,K*0_bar,rho+,rho-,Xi*-,Sigma-,
332 // Sigma+,Sigma*+,Sigma*-,Sigma_c-,Sigma_c+,D*_s+,D*0,Xi0_bar
333 // Xi0,Xi*+
334 //} else { // really only decay particles if there are not known to Geant3
335 // if (gMC->IdFromPDG(kf)>0)
336 // continue;
337 }
338 if (0) { // defining the particle for Geant3 leads to a floating point exception.
339 TParticlePDG *pdg = iparticle->GetPDG(1);
340 //pdg->Print(); printf("%s\n",pdg->ParticleClass());
341 TString ptype(pdg->ParticleClass());
342 TMCParticleType mctype(kPTUndefined);
343 if (ptype=="Baryon" || ptype=="Meson")
344 mctype = kPTHadron;
345 gMC->DefineParticle(pdg->PdgCode(), pdg->GetName(), mctype, pdg->Mass(), pdg->Charge(), pdg->Lifetime(),
346 ptype,pdg->Width(), (Int_t)pdg->Spin(), (Int_t)pdg->Parity(), 0,
347 (Int_t)pdg->Isospin(), 0, 0, 0, 0, pdg->Stable());
348 gMC->SetUserDecay(pdg->PdgCode());
349 continue;
350 }
351 */
352 TLorentzVector pmom(iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy());
353 decayer->Decay(kf,&pmom);
354 decayer->ImportParticles(&arr);
355 Int_t ndecayed = arr.GetEntries();
356 if (ndecayed>1) {
357 if (np2+ndecayed>fParticles.GetSize())
358 fParticles.Expand(2*fParticles.GetSize());
359 //arr.Print();
360 // iparticle->SetStatusCode(2); to be compatible with Hijing
361 iparticle->SetFirstDaughter(np2);
362 for (Int_t jj = 1; jj < ndecayed; jj++) {
363 TParticle *jp = (TParticle *)arr.At(jj);
364 if (jp->GetFirstMother()!=1)
365 continue;
366
367 TParticle *newp = new(fParticles[np2]) TParticle(jp->GetPdgCode(),
368 0, //1, //to be compatible with Hijing
369 i,
370 -1,
371 -1,
372 -1,
373 jp->Px(),jp->Py(),jp->Pz(),jp->Energy(),
374 jp->Vx(),jp->Vy(),jp->Vz(),jp->T());
375 //take care of the phi
376 //if((kf == 333)||(kf == 313)) {
377 if(IsThisAKnownParticle(iparticle)) {
378 //Printf("=============PANOS===================");
379 //Printf("Phi detected - daughet is: %d",jp->GetPdgCode());
380 newp->SetUniqueID(4);
381 }
382 else newp->SetUniqueID( jp->GetStatusCode() );
383 np2++;
384 } // end of jj->nDecayedParticles
385 iparticle->SetLastDaughter(np2-1);
386 } // end of nDecayedPrticles>1
387 } // end of i->np
388 np = fParticles.GetEntries();
389 if (np!=np2) {
390 AliError(Form("Something is fishy: %d %d\n", np,np2));
391 }
392 } // end of nLoop->NumberOfNestedLoops
393 } else {
394 if (fDecay)
395 AliError("No decayer found, but fDecay==kTRUE!");
396 }
397
398 if (fLHC)
399 Boost();
400
401 Int_t nc = 0;
402 Int_t* newPos = new Int_t[np];
403 Int_t* pSelected = new Int_t[np];
404
405 for (Int_t i = 0; i < np; i++) {
406 newPos[i] = i;
407 pSelected[i] = 0;
408 }
409
410 // Get event vertex
411 //TParticle * iparticle = (TParticle *) fParticles.At(0);
412 fVertex[0] = origin0[0];
413 fVertex[1] = origin0[1];
414 fVertex[2] = origin0[2];
415 //fTime = time0;
416
417 // First select parent particles
418 for (Int_t i = 0; i < np; i++) {
419 TParticle *iparticle = (TParticle *) fParticles.At(i);
420
421 // Is this a parent particle ?
422 if (Stable(iparticle)) continue; // quit if particle has no daughters
423 Bool_t selected = kTRUE;
424 Bool_t hasSelectedDaughters = kFALSE;
425 kf = iparticle->GetPdgCode();
426 ks = iparticle->GetStatusCode();
427 if (kf == 92)
428 continue;
429
430 if (!fSelectAll)
431 selected = KinematicSelection(iparticle, 0) && SelectFlavor(kf);
432 hasSelectedDaughters = DaughtersSelection(iparticle);
433
434 // Put particle on the stack if it is either selected or
435 // it is the mother of at least one seleted particle
436 if (selected || hasSelectedDaughters) {
437 nc++;
438 pSelected[i] = 1;
439 } // selected
440 } // particle loop parents
441
442 // Now select the final state particles
443 fProjectileSpecn = 0;
444 fProjectileSpecp = 0;
445 fTargetSpecn = 0;
446 fTargetSpecp = 0;
447 for (Int_t i = 0; i<np; i++) {
448 TParticle *iparticle = (TParticle *) fParticles.At(i);
449 // Is this a final state particle ?
450 if (!Stable(iparticle)) continue; // quit if particle has daughters
451 Bool_t selected = kTRUE;
452 kf = iparticle->GetPdgCode();
453 if (kf == 92)
454 continue;
455 ks = iparticle->GetStatusCode();
456 ksp = iparticle->GetUniqueID();
457
458 // --------------------------------------------------------------------------
459 // Count spectator neutrons and protons
460 if(ksp == 0 || ksp == 1) {
461 if(kf == kNeutron) fProjectileSpecn += 1;
462 if(kf == kProton) fProjectileSpecp += 1;
463 } else if(ksp == 10 || ksp == 11) {
464 if(kf == kNeutron) fTargetSpecn += 1;
465 if(kf == kProton) fTargetSpecp += 1;
466 }
467 // --------------------------------------------------------------------------
468 if (!fSelectAll) {
469 selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
470 if (!fSpectators && selected)
471 selected = (ksp != 0 && ksp != 1 && ksp != 10 && ksp != 11);
472 }
473
474 // Put particle on the stack if selected
475 if (selected) {
476 nc++;
477 pSelected[i] = 1;
478 if (0) printf("---> %d %d %d %s\n",i,nc,kf,iparticle->GetName());
479 } // selected
480 } // particle loop final state
481
482 // Write particles to stack
483 for (Int_t i = 0; i<np; i++) {
484 if (pSelected[i]) {
485 TParticle *iparticle = (TParticle *) fParticles.At(i);
486 Bool_t hasMother = (iparticle->GetFirstMother() >=0);
487 Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0);
488 kf = iparticle->GetPdgCode();
489 ks = iparticle->GetStatusCode();
490 p[0] = iparticle->Px();
491 p[1] = iparticle->Py();
492 p[2] = iparticle->Pz() * sign;
493 origin[0] = origin0[0]+iparticle->Vx();
494 origin[1] = origin0[1]+iparticle->Vy();
495 origin[2] = origin0[2]+iparticle->Vz();
496 tof = time0 + iparticle->T();
497
498 imo = -1;
499 TParticle* mother = 0;
500 TMCProcess procID = (TMCProcess) iparticle->GetUniqueID();
501 if (hasMother) {
502 imo = iparticle->GetFirstMother();
503 mother = (TParticle *) fParticles.At(imo);
504 imo = (mother->GetPdgCode() != 92) ? newPos[imo] : -1;
505 } else { // if has no mothers then it was created by AMPT
506 if(procID==999)
507 procID = kPPrimary; // reseting to ALIROOT convention
508 else
509 procID = kPNoProcess; // for expectators
510 } // if has mother
511 Bool_t tFlag = (fTrackIt && !hasDaughter);
512 PushTrack(tFlag,imo,kf,p,origin,polar,tof,procID,nt, 1., ks);
513 fNprimaries++;
514 KeepTrack(nt);
515 newPos[i] = nt;
516 } // if selected
517 } // particle loop
518 delete[] newPos;
519 delete[] pSelected;
520
521 AliInfo(Form("\n I've put %i particles on the stack \n",nc));
522 if (nc > 0) {
523 jev += nc;
524 if (jev >= fNpart || fNpart == -1) {
525 fKineBias = Float_t(fNpart)/Float_t(fTrials);
526 AliInfo(Form("\n Trials: %i %i %i\n",fTrials, fNpart, jev));
527 break;
528 }
529 }
530 } // event loop
531 MakeHeader();
532 SetHighWaterMark(nt);
533}
534
535Bool_t AliGenAmpt::IsThisAKnownParticle(TParticle *thisGuy)
536{
537 // In order to prevent AMPT to introduce weird particles into the decayer and transporter
538 // blame cperez@cern.ch for this method
539
540 Int_t pdgcode = TMath::Abs( thisGuy->GetPdgCode() );
541
542 Int_t myFavoriteParticles[ 38] = { 3322, 3314, 3312, 3224, 3222, // Xi0 Xi*+- Xi+- Sigma*-+ Sigma-+
543 3214, 3212, 3122, 3114, 3112, // Sigma*0 Sigma0 Lambda0 Sigma*+- Sigma+-
544 2224, 2214, 2212, 2114, 2112, // Delta--++ Delta-+ proton Delta0 neutron
545 1114, 323, 321, 313, 311, // Delta+- K*-+ K-+ K*0 K0
546 213, 211, 11, 22, 111, // rho-+ pi-+ e+- gamma pi0
547 113, 130, 221, 223, 310, // rho0 K_L0 eta omega K_S0
548 331, 333, 3324, 431, 421, // eta' phi Xi*0 Ds-+ D0
549 411, 413, 13 // D-+ D*-+ mu+-
550 };
551
552 Bool_t found = kFALSE;
553 for(Int_t i=0; i!=38; ++i)
554 if( myFavoriteParticles[i] == pdgcode ) {
555 found = kTRUE;
556 break;
557 }
558
559 return found;
560}
561
562void AliGenAmpt::EvaluateCrossSections()
563{
564 // Glauber Calculation of geometrical x-section
565
566 Float_t xTot = 0.; // barn
567 Float_t xTotHard = 0.; // barn
568 Float_t xPart = 0.; // barn
569 Float_t xPartHard = 0.; // barn
570 Float_t sigmaHard = 0.1; // mbarn
571 Float_t bMin = 0.;
572 Float_t bMax = fAmpt->GetHIPR1(34)+fAmpt->GetHIPR1(35);
573 const Float_t kdib = 0.2;
574 Int_t kMax = Int_t((bMax-bMin)/kdib)+1;
575
576 printf("\n Projectile Radius (fm): %f \n",fAmpt->GetHIPR1(34));
577 printf("\n Target Radius (fm): %f \n",fAmpt->GetHIPR1(35));
578
579 Int_t i;
580 Float_t oldvalue= 0.;
581 Float_t* b = new Float_t[kMax]; memset(b,0,kMax*sizeof(Float_t));
582 Float_t* si1 = new Float_t[kMax]; memset(si1,0,kMax*sizeof(Float_t));
583 Float_t* si2 = new Float_t[kMax]; memset(si2,0,kMax*sizeof(Float_t));
584 for (i = 0; i < kMax; i++) {
585 Float_t xb = bMin+i*kdib;
586 Float_t ov=fAmpt->Profile(xb);
587 Float_t gb = 2.*0.01*fAmpt->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fAmpt->GetHINT1(12)*ov));
588 Float_t gbh = 2.*0.01*fAmpt->GetHIPR1(40)*kdib*xb*sigmaHard*ov;
589 xTot+=gb;
590 xTotHard += gbh;
591 printf("profile %f %f %f\n", xb, ov, fAmpt->GetHINT1(12));
592
593 if (xb > fMinImpactParam && xb < fMaxImpactParam) {
594 xPart += gb;
595 xPartHard += gbh;
596 }
597
598 if ((oldvalue) && ((xTot-oldvalue)/oldvalue<0.0001))
599 break;
600 oldvalue = xTot;
601 printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot);
602 printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard);
603 if (i>0) {
604 si1[i] = gb/kdib;
605 si2[i] = gbh/gb;
606 b[i] = xb;
607 }
608 }
609
610 printf("\n Total cross section (barn): %f \n",xTot);
611 printf("\n Hard cross section (barn): %f \n \n",xTotHard);
612 printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.);
613 printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.);
614
615 // Store result as a graph
616 b[0] = 0;
617 si1[0] = 0;
618 si2[0]=si2[1];
619 delete fDsigmaDb;
620 fDsigmaDb = new TGraph(i, b, si1);
621 delete fDnDb;
622 fDnDb = new TGraph(i, b, si2);
623}
624
625Bool_t AliGenAmpt::DaughtersSelection(TParticle* iparticle)
626{
627 // Looks recursively if one of the daughters has been selected
628 //printf("\n Consider daughters %d:",iparticle->GetPdgCode());
629 Int_t imin = -1;
630 Int_t imax = -1;
631 Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0);
632 Bool_t selected = kFALSE;
633 if (hasDaughters) {
634 imin = iparticle->GetFirstDaughter();
635 imax = iparticle->GetLastDaughter();
636 for (Int_t i = imin; i <= imax; i++){
637 TParticle * jparticle = (TParticle *) fParticles.At(i);
638 Int_t ip = jparticle->GetPdgCode();
639 if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) {
640 selected=kTRUE; break;
641 }
642 if (DaughtersSelection(jparticle)) {selected=kTRUE; break; }
643 }
644 } else {
645 return kFALSE;
646 }
647 return selected;
648}
649
650Bool_t AliGenAmpt::SelectFlavor(Int_t pid)
651{
652 // Select flavor of particle
653 // 0: all
654 // 4: charm and beauty
655 // 5: beauty
656 Bool_t res = 0;
657
658 if (fFlavor == 0) {
659 res = kTRUE;
660 } else {
661 Int_t ifl = TMath::Abs(pid/100);
662 if (ifl > 10) ifl/=10;
663 res = (fFlavor == ifl);
664 }
665
666 // This part if gamma writing is inhibited
667 if (fNoGammas)
668 res = res && (pid != kGamma && pid != kPi0);
669
670 return res;
671}
672
673Bool_t AliGenAmpt::Stable(TParticle* particle) const
674{
675 // Return true for a stable particle
676
677 if (!particle)
678 return kFALSE;
679 if (particle->GetFirstDaughter() < 0 )
680 return kTRUE;
681 return kFALSE;
682
683 /// ADD LIST
684
685}
686
687void AliGenAmpt::MakeHeader()
688{
689 // Fills the event header, to be called after each event
690
691 fHeader->SetNProduced(fNprimaries);
692 fHeader->SetImpactParameter(fAmpt->GetHINT1(19));
693 fHeader->SetTotalEnergy(fAmpt->GetEATT());
694 fHeader->SetHardScatters(fAmpt->GetJATT());
695 fHeader->SetParticipants(fAmpt->GetNP(), fAmpt->GetNT());
696 fHeader->SetCollisions(fAmpt->GetN0(),
697 fAmpt->GetN01(),
698 fAmpt->GetN10(),
699 fAmpt->GetN11());
700 fHeader->SetSpectators(fProjectileSpecn, fProjectileSpecp,
701 fTargetSpecn,fTargetSpecp);
702 //fHeader->SetReactionPlaneAngle(fAmpt->GetHINT1(20));
703 fHeader->SetReactionPlaneAngle(fAmpt->GetReactionPlaneAngle());
704 //printf("Impact Parameter %13.3f \n", fAmpt->GetHINT1(19));
705
706 // 4-momentum vectors of the triggered jets.
707 // Before final state gluon radiation.
708 TLorentzVector* jet1 = new TLorentzVector(fAmpt->GetHINT1(21),
709 fAmpt->GetHINT1(22),
710 fAmpt->GetHINT1(23),
711 fAmpt->GetHINT1(24));
712
713 TLorentzVector* jet2 = new TLorentzVector(fAmpt->GetHINT1(31),
714 fAmpt->GetHINT1(32),
715 fAmpt->GetHINT1(33),
716 fAmpt->GetHINT1(34));
717 // After final state gluon radiation.
718 TLorentzVector* jet3 = new TLorentzVector(fAmpt->GetHINT1(26),
719 fAmpt->GetHINT1(27),
720 fAmpt->GetHINT1(28),
721 fAmpt->GetHINT1(29));
722
723 TLorentzVector* jet4 = new TLorentzVector(fAmpt->GetHINT1(36),
724 fAmpt->GetHINT1(37),
725 fAmpt->GetHINT1(38),
726 fAmpt->GetHINT1(39));
727 fHeader->SetJets(jet1, jet2, jet3, jet4);
728 // Bookkeeping for kinematic bias
729 fHeader->SetTrials(fTrials);
730 // Event Vertex
731 fHeader->SetPrimaryVertex(fVertex);
732 fHeader->SetInteractionTime(fEventTime);
733
734 fCollisionGeometry = fHeader;
735 AddHeader(fHeader);
736}
737
738
739Bool_t AliGenAmpt::CheckTrigger()
740{
741 // Check the kinematic trigger condition
742
743 Bool_t triggered = kFALSE;
744
745 if (fTrigger == 1) {
746 // jet-jet Trigger
747 TLorentzVector* jet1 = new TLorentzVector(fAmpt->GetHINT1(26),
748 fAmpt->GetHINT1(27),
749 fAmpt->GetHINT1(28),
750 fAmpt->GetHINT1(29));
751
752 TLorentzVector* jet2 = new TLorentzVector(fAmpt->GetHINT1(36),
753 fAmpt->GetHINT1(37),
754 fAmpt->GetHINT1(38),
755 fAmpt->GetHINT1(39));
756 Double_t eta1 = jet1->Eta();
757 Double_t eta2 = jet2->Eta();
758 Double_t phi1 = jet1->Phi();
759 Double_t phi2 = jet2->Phi();
760 //printf("\n Trigger: %f %f %f %f", fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet);
761 if ( (eta1 < fEtaMaxJet && eta1 > fEtaMinJet &&
762 phi1 < fPhiMaxJet && phi1 > fPhiMinJet)
763 ||
764 (eta2 < fEtaMaxJet && eta2 > fEtaMinJet &&
765 phi2 < fPhiMaxJet && phi2 > fPhiMinJet)
766 )
767 triggered = kTRUE;
768 } else if (fTrigger == 2) {
769 // Gamma Jet
770 Int_t np = fParticles.GetEntriesFast();
771 for (Int_t i = 0; i < np; i++) {
772 TParticle* part = (TParticle*) fParticles.At(i);
773 Int_t kf = part->GetPdgCode();
774 Int_t ksp = part->GetUniqueID();
775 if (kf == 22 && ksp == 40) {
776 Float_t phi = part->Phi();
777 Float_t eta = part->Eta();
778 if (eta < fEtaMaxJet &&
779 eta > fEtaMinJet &&
780 phi < fPhiMaxJet &&
781 phi > fPhiMinJet) {
782 triggered = 1;
783 break;
784 } // check phi,eta within limits
785 } // direct gamma ?
786 } // particle loop
787 } // fTrigger == 2
788 return triggered;
789}