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0119ef9a | 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> | |
d60fac1e | 28 | #include <TVirtualMC.h> |
29 | #include <TParticlePDG.h> | |
0119ef9a | 30 | #include "AliGenHijingEventHeader.h" |
31 | #define AliGenAmptEventHeader AliGenHijingEventHeader | |
32 | #include "AliAmptRndm.h" | |
33 | #include "AliLog.h" | |
34 | #include "AliRun.h" | |
d60fac1e | 35 | #include "AliDecayer.h" |
0119ef9a | 36 | |
37 | ClassImp(AliGenAmpt) | |
38 | ||
39 | AliGenAmpt::AliGenAmpt() | |
40 | : AliGenMC(), | |
d12123e8 | 41 | fDecayer(NULL), |
0119ef9a | 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), | |
c6db63eb | 77 | fIsoft(4), |
0119ef9a | 78 | fNtMax(150), |
79 | fIpop(1), | |
80 | fXmu(3.2264), | |
a004b331 | 81 | fAlpha(1./3), |
82 | fStringA(0.5), | |
83 | fStringB(0.9), | |
d12123e8 | 84 | fEventTime(0.), |
d60fac1e | 85 | fHeader(new AliGenAmptEventHeader("Ampt")), |
48beeea0 | 86 | fDecay(kTRUE), |
87 | fRotating(kFALSE) | |
0119ef9a | 88 | { |
89 | // Constructor | |
d60fac1e | 90 | fEnergyCMS = 2760.; |
0119ef9a | 91 | AliAmptRndm::SetAmptRandom(GetRandom()); |
92 | } | |
93 | ||
94 | AliGenAmpt::AliGenAmpt(Int_t npart) | |
95 | : AliGenMC(npart), | |
d12123e8 | 96 | fDecayer(NULL), |
0119ef9a | 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), | |
0119ef9a | 132 | fIsoft(1), |
133 | fNtMax(150), | |
134 | fIpop(1), | |
135 | fXmu(3.2264), | |
a004b331 | 136 | fAlpha(1./3), |
137 | fStringA(0.5), | |
138 | fStringB(0.9), | |
d12123e8 | 139 | fEventTime(0.), |
d60fac1e | 140 | fHeader(new AliGenAmptEventHeader("Ampt")), |
48beeea0 | 141 | fDecay(kTRUE), |
142 | fRotating(kFALSE) | |
0119ef9a | 143 | { |
d60fac1e | 144 | // Default PbPb collisions at 2.76 TeV |
0119ef9a | 145 | |
d60fac1e | 146 | fEnergyCMS = 2760.; |
0119ef9a | 147 | fName = "Ampt"; |
148 | fTitle= "Particle Generator using AMPT"; | |
149 | AliAmptRndm::SetAmptRandom(GetRandom()); | |
150 | } | |
151 | ||
152 | AliGenAmpt::~AliGenAmpt() | |
153 | { | |
154 | // Destructor | |
155 | if ( fDsigmaDb) delete fDsigmaDb; | |
156 | if ( fDnDb) delete fDnDb; | |
157 | if ( fHeader) delete fHeader; | |
158 | } | |
159 | ||
160 | void 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); | |
a004b331 | 224 | fAmpt->SetAlpha(fAlpha); |
225 | fAmpt->SetStringFrag(fStringA, fStringB); | |
0119ef9a | 226 | |
227 | AliGenMC::Init(); | |
228 | ||
229 | // Initialize Ampt | |
230 | fAmpt->Initialize(); | |
231 | if (fEvaluate) | |
232 | EvaluateCrossSections(); | |
48beeea0 | 233 | |
234 | fAmpt->SetReactionPlaneAngle(0.0); | |
0119ef9a | 235 | } |
236 | ||
237 | void AliGenAmpt::Generate() | |
238 | { | |
239 | // Generate one event | |
240 | ||
241 | Float_t polar[3] = {0,0,0}; | |
242 | Float_t origin[3] = {0,0,0}; | |
243 | Float_t origin0[3] = {0,0,0}; | |
cdfa7be6 | 244 | Float_t time0 = 0.; |
0119ef9a | 245 | Float_t p[3]; |
246 | Float_t tof; | |
247 | ||
0119ef9a | 248 | Int_t nt = 0; |
249 | Int_t jev = 0; | |
250 | Int_t j, kf, ks, ksp, imo; | |
251 | kf = 0; | |
252 | ||
253 | fTrials = 0; | |
254 | for (j = 0;j < 3; j++) | |
255 | origin0[j] = fOrigin[j]; | |
d12123e8 | 256 | //time0 = fTimeOrigin; |
0119ef9a | 257 | |
258 | if(fVertexSmear == kPerEvent) { | |
259 | Vertex(); | |
260 | for (j=0; j < 3; j++) | |
261 | origin0[j] = fVertex[j]; | |
d12123e8 | 262 | //time0 = fTime; |
0119ef9a | 263 | } |
264 | ||
265 | Float_t sign = (fRandomPz && (Rndm() < 0.5))? -1. : 1.; | |
266 | ||
267 | while(1) { | |
48beeea0 | 268 | |
269 | // Generate random reaction plane angle if requested | |
270 | if( fRotating ) { | |
271 | TRandom *r=AliAmptRndm::GetAmptRandom(); | |
272 | fAmpt->SetReactionPlaneAngle(TMath::TwoPi()*r->Rndm()); | |
273 | } | |
274 | ||
0119ef9a | 275 | // Generate one event |
276 | Int_t fpemask = gSystem->GetFPEMask(); | |
277 | gSystem->SetFPEMask(0); | |
278 | fAmpt->GenerateEvent(); | |
279 | gSystem->SetFPEMask(fpemask); | |
280 | fTrials++; | |
281 | fNprimaries = 0; | |
48beeea0 | 282 | |
283 | ||
0119ef9a | 284 | fAmpt->ImportParticles(&fParticles,"All"); |
285 | Int_t np = fParticles.GetEntriesFast(); | |
286 | if (np == 0 ) | |
287 | continue; | |
774ceaaf | 288 | // |
289 | //RS>>: Decayers now returns cm and sec. Since TAmpt returns mm and mm/c, convert its result to cm and sec here | |
290 | const Float_t kconvT=0.001/2.999792458e8; // mm/c to seconds conversion | |
291 | const Float_t kconvL=1./10; // mm to cm conversion | |
292 | for (int ip=np;ip--;) { | |
293 | TParticle* part = (TParticle*)fParticles[ip]; | |
294 | if (!part) continue; | |
295 | part->SetProductionVertex(part->Vx()*kconvL,part->Vy()*kconvL,part->Vz()*kconvL,kconvT*part->T()); | |
296 | } | |
297 | // RS<< | |
298 | // | |
0119ef9a | 299 | if (fTrigger != kNoTrigger) { |
300 | if (!CheckTrigger()) | |
301 | continue; | |
302 | } | |
d60fac1e | 303 | |
304 | AliDecayer *decayer = 0; | |
d12123e8 | 305 | //if (gMC) |
306 | // decayer = gMC->GetDecayer(); | |
307 | decayer = fDecayer; //AMPT does not do the strong decays per dafault | |
d60fac1e | 308 | |
309 | if (decayer&&fDecay) { | |
310 | TClonesArray arr("TParticle",100); | |
d12123e8 | 311 | for( Int_t nLoop=0; nLoop!=2; ++nLoop) { // In order to produce more than one generation of decays: NumberOfNestedLoops set to 2 |
312 | Int_t np2 = np; | |
313 | for (Int_t i = 0; i < np; i++) { | |
314 | TParticle *iparticle = (TParticle *)fParticles.At(i); | |
315 | if (!Stable(iparticle)) // true if particle has daughters already | |
316 | continue; | |
317 | kf = TMath::Abs(iparticle->GetPdgCode()); | |
318 | if (kf==92) | |
319 | continue; | |
320 | if( !IsThisAKnownParticle(iparticle) ) continue; // skip undesired particles | |
321 | /* | |
322 | if (0) { // this turned out to be too cumbersome! | |
323 | if (kf!=331&&kf!=3114&&kf!=3114&&kf!=411&&kf!=-4122&&kf!=-3324&&kf!=-3312&&kf!=-3114&& | |
324 | kf!=-311&&kf!=3214&&kf!=-3214&&kf!=-433&&kf!=413&&kf!=3122&&kf!=-3122&&kf!=-413&& | |
325 | kf!=-421&&kf!=-423&&kf!=3324&&kf!=-313&&kf!=213&&kf!=-213&&kf!=3314&&kf!=3222&& | |
326 | kf!=-3222&&kf!=3224&&kf!=-3224&&kf!=-4212&&kf!=4212&&kf!=433&&kf!=423&&kf!=-3322&& | |
327 | kf!=3322&&kf!=-3314) | |
328 | continue; //decay eta',Sigma*+,Sigma*-,D+,Lambda_c-,Xi*0_bar,Xi-_bar,Sigma*-, | |
329 | // K0_bar,Sigma*0,Sigma*0_bar,D*_s-,D*+,Lambda0,Lambda0_bar,D*- | |
330 | // D0_bar,D*0_bar,Xi*0,K*0_bar,rho+,rho-,Xi*-,Sigma-, | |
331 | // Sigma+,Sigma*+,Sigma*-,Sigma_c-,Sigma_c+,D*_s+,D*0,Xi0_bar | |
332 | // Xi0,Xi*+ | |
333 | //} else { // really only decay particles if there are not known to Geant3 | |
334 | // if (gMC->IdFromPDG(kf)>0) | |
335 | // continue; | |
336 | } | |
337 | if (0) { // defining the particle for Geant3 leads to a floating point exception. | |
338 | TParticlePDG *pdg = iparticle->GetPDG(1); | |
339 | //pdg->Print(); printf("%s\n",pdg->ParticleClass()); | |
340 | TString ptype(pdg->ParticleClass()); | |
341 | TMCParticleType mctype(kPTUndefined); | |
342 | if (ptype=="Baryon" || ptype=="Meson") | |
343 | mctype = kPTHadron; | |
344 | gMC->DefineParticle(pdg->PdgCode(), pdg->GetName(), mctype, pdg->Mass(), pdg->Charge(), pdg->Lifetime(), | |
345 | ptype,pdg->Width(), (Int_t)pdg->Spin(), (Int_t)pdg->Parity(), 0, | |
346 | (Int_t)pdg->Isospin(), 0, 0, 0, 0, pdg->Stable()); | |
347 | gMC->SetUserDecay(pdg->PdgCode()); | |
348 | continue; | |
349 | } | |
350 | */ | |
351 | TLorentzVector pmom(iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy()); | |
352 | decayer->Decay(kf,&pmom); | |
353 | decayer->ImportParticles(&arr); | |
354 | Int_t ndecayed = arr.GetEntries(); | |
355 | if (ndecayed>1) { | |
356 | if (np2+ndecayed>fParticles.GetSize()) | |
357 | fParticles.Expand(2*fParticles.GetSize()); | |
358 | //arr.Print(); | |
359 | // iparticle->SetStatusCode(2); to be compatible with Hijing | |
360 | iparticle->SetFirstDaughter(np2); | |
afe6642c | 361 | for (Int_t jj = 1; jj < ndecayed; jj++) { |
d12123e8 | 362 | TParticle *jp = (TParticle *)arr.At(jj); |
363 | if (jp->GetFirstMother()!=1) | |
364 | continue; | |
afe6642c | 365 | |
366 | TParticle *newp = new(fParticles[np2]) TParticle(jp->GetPdgCode(), | |
d12123e8 | 367 | 0, //1, //to be compatible with Hijing |
368 | i, | |
369 | -1, | |
370 | -1, | |
371 | -1, | |
372 | jp->Px(),jp->Py(),jp->Pz(),jp->Energy(), | |
afe6642c | 373 | jp->Vx(),jp->Vy(),jp->Vz(),jp->T()); |
374 | //take care of the phi | |
375 | //if((kf == 333)||(kf == 313)) { | |
376 | if(IsThisAKnownParticle(iparticle)) { | |
377 | //Printf("=============PANOS==================="); | |
378 | //Printf("Phi detected - daughet is: %d",jp->GetPdgCode()); | |
379 | newp->SetUniqueID(4); | |
380 | } | |
381 | else newp->SetUniqueID( jp->GetStatusCode() ); | |
d12123e8 | 382 | np2++; |
383 | } // end of jj->nDecayedParticles | |
384 | iparticle->SetLastDaughter(np2-1); | |
385 | } // end of nDecayedPrticles>1 | |
386 | } // end of i->np | |
387 | np = fParticles.GetEntries(); | |
388 | if (np!=np2) { | |
389 | AliError(Form("Something is fishy: %d %d\n", np,np2)); | |
d60fac1e | 390 | } |
d12123e8 | 391 | } // end of nLoop->NumberOfNestedLoops |
d60fac1e | 392 | } else { |
393 | if (fDecay) | |
394 | AliError("No decayer found, but fDecay==kTRUE!"); | |
395 | } | |
396 | ||
0119ef9a | 397 | if (fLHC) |
398 | Boost(); | |
399 | ||
400 | Int_t nc = 0; | |
401 | Int_t* newPos = new Int_t[np]; | |
402 | Int_t* pSelected = new Int_t[np]; | |
403 | ||
404 | for (Int_t i = 0; i < np; i++) { | |
405 | newPos[i] = i; | |
406 | pSelected[i] = 0; | |
407 | } | |
408 | ||
409 | // Get event vertex | |
410 | //TParticle * iparticle = (TParticle *) fParticles.At(0); | |
411 | fVertex[0] = origin0[0]; | |
412 | fVertex[1] = origin0[1]; | |
413 | fVertex[2] = origin0[2]; | |
d12123e8 | 414 | //fTime = time0; |
0119ef9a | 415 | |
416 | // First select parent particles | |
417 | for (Int_t i = 0; i < np; i++) { | |
418 | TParticle *iparticle = (TParticle *) fParticles.At(i); | |
419 | ||
420 | // Is this a parent particle ? | |
d12123e8 | 421 | if (Stable(iparticle)) continue; // quit if particle has no daughters |
0119ef9a | 422 | Bool_t selected = kTRUE; |
423 | Bool_t hasSelectedDaughters = kFALSE; | |
d12123e8 | 424 | kf = iparticle->GetPdgCode(); |
425 | ks = iparticle->GetStatusCode(); | |
0119ef9a | 426 | if (kf == 92) |
427 | continue; | |
428 | ||
429 | if (!fSelectAll) | |
430 | selected = KinematicSelection(iparticle, 0) && SelectFlavor(kf); | |
431 | hasSelectedDaughters = DaughtersSelection(iparticle); | |
432 | ||
433 | // Put particle on the stack if it is either selected or | |
434 | // it is the mother of at least one seleted particle | |
435 | if (selected || hasSelectedDaughters) { | |
436 | nc++; | |
437 | pSelected[i] = 1; | |
438 | } // selected | |
439 | } // particle loop parents | |
440 | ||
441 | // Now select the final state particles | |
442 | fProjectileSpecn = 0; | |
443 | fProjectileSpecp = 0; | |
444 | fTargetSpecn = 0; | |
445 | fTargetSpecp = 0; | |
446 | for (Int_t i = 0; i<np; i++) { | |
447 | TParticle *iparticle = (TParticle *) fParticles.At(i); | |
448 | // Is this a final state particle ? | |
d12123e8 | 449 | if (!Stable(iparticle)) continue; // quit if particle has daughters |
450 | Bool_t selected = kTRUE; | |
451 | kf = iparticle->GetPdgCode(); | |
d60fac1e | 452 | if (kf == 92) |
453 | continue; | |
d12123e8 | 454 | ks = iparticle->GetStatusCode(); |
455 | ksp = iparticle->GetUniqueID(); | |
0119ef9a | 456 | |
457 | // -------------------------------------------------------------------------- | |
458 | // Count spectator neutrons and protons | |
459 | if(ksp == 0 || ksp == 1) { | |
460 | if(kf == kNeutron) fProjectileSpecn += 1; | |
461 | if(kf == kProton) fProjectileSpecp += 1; | |
462 | } else if(ksp == 10 || ksp == 11) { | |
463 | if(kf == kNeutron) fTargetSpecn += 1; | |
464 | if(kf == kProton) fTargetSpecp += 1; | |
465 | } | |
466 | // -------------------------------------------------------------------------- | |
467 | if (!fSelectAll) { | |
468 | selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf); | |
469 | if (!fSpectators && selected) | |
470 | selected = (ksp != 0 && ksp != 1 && ksp != 10 && ksp != 11); | |
471 | } | |
472 | ||
473 | // Put particle on the stack if selected | |
474 | if (selected) { | |
475 | nc++; | |
476 | pSelected[i] = 1; | |
68a6e988 | 477 | if (0) printf("---> %d %d %d %s\n",i,nc,kf,iparticle->GetName()); |
0119ef9a | 478 | } // selected |
479 | } // particle loop final state | |
480 | ||
0119ef9a | 481 | // Write particles to stack |
482 | for (Int_t i = 0; i<np; i++) { | |
0119ef9a | 483 | if (pSelected[i]) { |
d12123e8 | 484 | TParticle *iparticle = (TParticle *) fParticles.At(i); |
485 | Bool_t hasMother = (iparticle->GetFirstMother() >=0); | |
486 | Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0); | |
0119ef9a | 487 | kf = iparticle->GetPdgCode(); |
488 | ks = iparticle->GetStatusCode(); | |
489 | p[0] = iparticle->Px(); | |
490 | p[1] = iparticle->Py(); | |
491 | p[2] = iparticle->Pz() * sign; | |
774ceaaf | 492 | origin[0] = origin0[0]+iparticle->Vx(); |
493 | origin[1] = origin0[1]+iparticle->Vy(); | |
494 | origin[2] = origin0[2]+iparticle->Vz(); | |
495 | tof = time0 + iparticle->T(); | |
cdfa7be6 | 496 | |
0119ef9a | 497 | imo = -1; |
498 | TParticle* mother = 0; | |
d12123e8 | 499 | TMCProcess procID = (TMCProcess) iparticle->GetUniqueID(); |
0119ef9a | 500 | if (hasMother) { |
501 | imo = iparticle->GetFirstMother(); | |
502 | mother = (TParticle *) fParticles.At(imo); | |
503 | imo = (mother->GetPdgCode() != 92) ? newPos[imo] : -1; | |
d12123e8 | 504 | } else { // if has no mothers then it was created by AMPT |
505 | if(procID==999) | |
506 | procID = kPPrimary; // reseting to ALIROOT convention | |
507 | else | |
508 | procID = kPNoProcess; // for expectators | |
0119ef9a | 509 | } // if has mother |
510 | Bool_t tFlag = (fTrackIt && !hasDaughter); | |
d12123e8 | 511 | PushTrack(tFlag,imo,kf,p,origin,polar,tof,procID,nt, 1., ks); |
0119ef9a | 512 | fNprimaries++; |
513 | KeepTrack(nt); | |
514 | newPos[i] = nt; | |
515 | } // if selected | |
516 | } // particle loop | |
517 | delete[] newPos; | |
518 | delete[] pSelected; | |
519 | ||
520 | AliInfo(Form("\n I've put %i particles on the stack \n",nc)); | |
521 | if (nc > 0) { | |
522 | jev += nc; | |
523 | if (jev >= fNpart || fNpart == -1) { | |
524 | fKineBias = Float_t(fNpart)/Float_t(fTrials); | |
525 | AliInfo(Form("\n Trials: %i %i %i\n",fTrials, fNpart, jev)); | |
526 | break; | |
527 | } | |
528 | } | |
529 | } // event loop | |
530 | MakeHeader(); | |
531 | SetHighWaterMark(nt); | |
532 | } | |
533 | ||
d12123e8 | 534 | Bool_t AliGenAmpt::IsThisAKnownParticle(TParticle *thisGuy) |
535 | { | |
536 | // In order to prevent AMPT to introduce weird particles into the decayer and transporter | |
537 | // blame cperez@cern.ch for this method | |
538 | ||
539 | Int_t pdgcode = TMath::Abs( thisGuy->GetPdgCode() ); | |
540 | ||
541 | Int_t myFavoriteParticles[ 38] = { 3322, 3314, 3312, 3224, 3222, // Xi0 Xi*+- Xi+- Sigma*-+ Sigma-+ | |
542 | 3214, 3212, 3122, 3114, 3112, // Sigma*0 Sigma0 Lambda0 Sigma*+- Sigma+- | |
543 | 2224, 2214, 2212, 2114, 2112, // Delta--++ Delta-+ proton Delta0 neutron | |
544 | 1114, 323, 321, 313, 311, // Delta+- K*-+ K-+ K*0 K0 | |
545 | 213, 211, 11, 22, 111, // rho-+ pi-+ e+- gamma pi0 | |
546 | 113, 130, 221, 223, 310, // rho0 K_L0 eta omega K_S0 | |
547 | 331, 333, 3324, 431, 421, // eta' phi Xi*0 Ds-+ D0 | |
548 | 411, 413, 13 // D-+ D*-+ mu+- | |
549 | }; | |
550 | ||
551 | Bool_t found = kFALSE; | |
552 | for(Int_t i=0; i!=38; ++i) | |
553 | if( myFavoriteParticles[i] == pdgcode ) { | |
554 | found = kTRUE; | |
555 | break; | |
556 | } | |
557 | ||
558 | return found; | |
559 | } | |
560 | ||
0119ef9a | 561 | void AliGenAmpt::EvaluateCrossSections() |
562 | { | |
563 | // Glauber Calculation of geometrical x-section | |
564 | ||
565 | Float_t xTot = 0.; // barn | |
566 | Float_t xTotHard = 0.; // barn | |
567 | Float_t xPart = 0.; // barn | |
568 | Float_t xPartHard = 0.; // barn | |
569 | Float_t sigmaHard = 0.1; // mbarn | |
570 | Float_t bMin = 0.; | |
571 | Float_t bMax = fAmpt->GetHIPR1(34)+fAmpt->GetHIPR1(35); | |
572 | const Float_t kdib = 0.2; | |
573 | Int_t kMax = Int_t((bMax-bMin)/kdib)+1; | |
574 | ||
575 | printf("\n Projectile Radius (fm): %f \n",fAmpt->GetHIPR1(34)); | |
576 | printf("\n Target Radius (fm): %f \n",fAmpt->GetHIPR1(35)); | |
577 | ||
578 | Int_t i; | |
579 | Float_t oldvalue= 0.; | |
48eb126c | 580 | Float_t* b = new Float_t[kMax]; memset(b,0,kMax*sizeof(Float_t)); |
581 | Float_t* si1 = new Float_t[kMax]; memset(si1,0,kMax*sizeof(Float_t)); | |
582 | Float_t* si2 = new Float_t[kMax]; memset(si2,0,kMax*sizeof(Float_t)); | |
0119ef9a | 583 | for (i = 0; i < kMax; i++) { |
584 | Float_t xb = bMin+i*kdib; | |
585 | Float_t ov=fAmpt->Profile(xb); | |
586 | Float_t gb = 2.*0.01*fAmpt->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fAmpt->GetHINT1(12)*ov)); | |
587 | Float_t gbh = 2.*0.01*fAmpt->GetHIPR1(40)*kdib*xb*sigmaHard*ov; | |
588 | xTot+=gb; | |
589 | xTotHard += gbh; | |
590 | printf("profile %f %f %f\n", xb, ov, fAmpt->GetHINT1(12)); | |
591 | ||
592 | if (xb > fMinImpactParam && xb < fMaxImpactParam) { | |
593 | xPart += gb; | |
594 | xPartHard += gbh; | |
595 | } | |
596 | ||
597 | if ((oldvalue) && ((xTot-oldvalue)/oldvalue<0.0001)) | |
598 | break; | |
599 | oldvalue = xTot; | |
600 | printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot); | |
601 | printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard); | |
602 | if (i>0) { | |
603 | si1[i] = gb/kdib; | |
604 | si2[i] = gbh/gb; | |
605 | b[i] = xb; | |
606 | } | |
607 | } | |
608 | ||
609 | printf("\n Total cross section (barn): %f \n",xTot); | |
610 | printf("\n Hard cross section (barn): %f \n \n",xTotHard); | |
611 | printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.); | |
612 | printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.); | |
613 | ||
614 | // Store result as a graph | |
615 | b[0] = 0; | |
616 | si1[0] = 0; | |
617 | si2[0]=si2[1]; | |
618 | delete fDsigmaDb; | |
619 | fDsigmaDb = new TGraph(i, b, si1); | |
620 | delete fDnDb; | |
621 | fDnDb = new TGraph(i, b, si2); | |
622 | } | |
623 | ||
624 | Bool_t AliGenAmpt::DaughtersSelection(TParticle* iparticle) | |
625 | { | |
626 | // Looks recursively if one of the daughters has been selected | |
627 | //printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
628 | Int_t imin = -1; | |
629 | Int_t imax = -1; | |
630 | Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0); | |
631 | Bool_t selected = kFALSE; | |
632 | if (hasDaughters) { | |
633 | imin = iparticle->GetFirstDaughter(); | |
634 | imax = iparticle->GetLastDaughter(); | |
635 | for (Int_t i = imin; i <= imax; i++){ | |
636 | TParticle * jparticle = (TParticle *) fParticles.At(i); | |
637 | Int_t ip = jparticle->GetPdgCode(); | |
638 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { | |
639 | selected=kTRUE; break; | |
640 | } | |
641 | if (DaughtersSelection(jparticle)) {selected=kTRUE; break; } | |
642 | } | |
643 | } else { | |
644 | return kFALSE; | |
645 | } | |
646 | return selected; | |
647 | } | |
648 | ||
649 | Bool_t AliGenAmpt::SelectFlavor(Int_t pid) | |
650 | { | |
651 | // Select flavor of particle | |
652 | // 0: all | |
653 | // 4: charm and beauty | |
654 | // 5: beauty | |
655 | Bool_t res = 0; | |
656 | ||
657 | if (fFlavor == 0) { | |
658 | res = kTRUE; | |
659 | } else { | |
660 | Int_t ifl = TMath::Abs(pid/100); | |
661 | if (ifl > 10) ifl/=10; | |
662 | res = (fFlavor == ifl); | |
663 | } | |
664 | ||
665 | // This part if gamma writing is inhibited | |
666 | if (fNoGammas) | |
667 | res = res && (pid != kGamma && pid != kPi0); | |
668 | ||
669 | return res; | |
670 | } | |
671 | ||
d60fac1e | 672 | Bool_t AliGenAmpt::Stable(TParticle* particle) const |
0119ef9a | 673 | { |
674 | // Return true for a stable particle | |
675 | ||
d60fac1e | 676 | if (!particle) |
677 | return kFALSE; | |
0119ef9a | 678 | if (particle->GetFirstDaughter() < 0 ) |
0119ef9a | 679 | return kTRUE; |
d60fac1e | 680 | return kFALSE; |
d12123e8 | 681 | |
682 | /// ADD LIST | |
683 | ||
0119ef9a | 684 | } |
685 | ||
686 | void AliGenAmpt::MakeHeader() | |
687 | { | |
688 | // Fills the event header, to be called after each event | |
689 | ||
690 | fHeader->SetNProduced(fNprimaries); | |
691 | fHeader->SetImpactParameter(fAmpt->GetHINT1(19)); | |
692 | fHeader->SetTotalEnergy(fAmpt->GetEATT()); | |
693 | fHeader->SetHardScatters(fAmpt->GetJATT()); | |
694 | fHeader->SetParticipants(fAmpt->GetNP(), fAmpt->GetNT()); | |
695 | fHeader->SetCollisions(fAmpt->GetN0(), | |
696 | fAmpt->GetN01(), | |
697 | fAmpt->GetN10(), | |
698 | fAmpt->GetN11()); | |
699 | fHeader->SetSpectators(fProjectileSpecn, fProjectileSpecp, | |
700 | fTargetSpecn,fTargetSpecp); | |
48beeea0 | 701 | //fHeader->SetReactionPlaneAngle(fAmpt->GetHINT1(20)); |
702 | fHeader->SetReactionPlaneAngle(fAmpt->GetReactionPlaneAngle()); | |
0119ef9a | 703 | //printf("Impact Parameter %13.3f \n", fAmpt->GetHINT1(19)); |
704 | ||
705 | // 4-momentum vectors of the triggered jets. | |
706 | // Before final state gluon radiation. | |
707 | TLorentzVector* jet1 = new TLorentzVector(fAmpt->GetHINT1(21), | |
708 | fAmpt->GetHINT1(22), | |
709 | fAmpt->GetHINT1(23), | |
710 | fAmpt->GetHINT1(24)); | |
711 | ||
712 | TLorentzVector* jet2 = new TLorentzVector(fAmpt->GetHINT1(31), | |
713 | fAmpt->GetHINT1(32), | |
714 | fAmpt->GetHINT1(33), | |
715 | fAmpt->GetHINT1(34)); | |
716 | // After final state gluon radiation. | |
717 | TLorentzVector* jet3 = new TLorentzVector(fAmpt->GetHINT1(26), | |
718 | fAmpt->GetHINT1(27), | |
719 | fAmpt->GetHINT1(28), | |
720 | fAmpt->GetHINT1(29)); | |
721 | ||
722 | TLorentzVector* jet4 = new TLorentzVector(fAmpt->GetHINT1(36), | |
723 | fAmpt->GetHINT1(37), | |
724 | fAmpt->GetHINT1(38), | |
725 | fAmpt->GetHINT1(39)); | |
726 | fHeader->SetJets(jet1, jet2, jet3, jet4); | |
727 | // Bookkeeping for kinematic bias | |
728 | fHeader->SetTrials(fTrials); | |
729 | // Event Vertex | |
730 | fHeader->SetPrimaryVertex(fVertex); | |
d12123e8 | 731 | fHeader->SetInteractionTime(fEventTime); |
732 | ||
0119ef9a | 733 | fCollisionGeometry = fHeader; |
734 | AddHeader(fHeader); | |
735 | } | |
736 | ||
737 | ||
738 | Bool_t AliGenAmpt::CheckTrigger() | |
739 | { | |
740 | // Check the kinematic trigger condition | |
741 | ||
742 | Bool_t triggered = kFALSE; | |
743 | ||
744 | if (fTrigger == 1) { | |
745 | // jet-jet Trigger | |
746 | TLorentzVector* jet1 = new TLorentzVector(fAmpt->GetHINT1(26), | |
747 | fAmpt->GetHINT1(27), | |
748 | fAmpt->GetHINT1(28), | |
749 | fAmpt->GetHINT1(29)); | |
750 | ||
751 | TLorentzVector* jet2 = new TLorentzVector(fAmpt->GetHINT1(36), | |
752 | fAmpt->GetHINT1(37), | |
753 | fAmpt->GetHINT1(38), | |
754 | fAmpt->GetHINT1(39)); | |
755 | Double_t eta1 = jet1->Eta(); | |
756 | Double_t eta2 = jet2->Eta(); | |
757 | Double_t phi1 = jet1->Phi(); | |
758 | Double_t phi2 = jet2->Phi(); | |
759 | //printf("\n Trigger: %f %f %f %f", fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet); | |
760 | if ( (eta1 < fEtaMaxJet && eta1 > fEtaMinJet && | |
761 | phi1 < fPhiMaxJet && phi1 > fPhiMinJet) | |
762 | || | |
763 | (eta2 < fEtaMaxJet && eta2 > fEtaMinJet && | |
764 | phi2 < fPhiMaxJet && phi2 > fPhiMinJet) | |
765 | ) | |
766 | triggered = kTRUE; | |
767 | } else if (fTrigger == 2) { | |
768 | // Gamma Jet | |
769 | Int_t np = fParticles.GetEntriesFast(); | |
770 | for (Int_t i = 0; i < np; i++) { | |
771 | TParticle* part = (TParticle*) fParticles.At(i); | |
772 | Int_t kf = part->GetPdgCode(); | |
773 | Int_t ksp = part->GetUniqueID(); | |
774 | if (kf == 22 && ksp == 40) { | |
775 | Float_t phi = part->Phi(); | |
776 | Float_t eta = part->Eta(); | |
777 | if (eta < fEtaMaxJet && | |
778 | eta > fEtaMinJet && | |
779 | phi < fPhiMaxJet && | |
780 | phi > fPhiMinJet) { | |
781 | triggered = 1; | |
782 | break; | |
783 | } // check phi,eta within limits | |
784 | } // direct gamma ? | |
785 | } // particle loop | |
786 | } // fTrigger == 2 | |
787 | return triggered; | |
788 | } |