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618e1dc0 | 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 | ||
7cdba479 | 16 | /* $Id$ */ |
618e1dc0 | 17 | |
18 | ||
19 | // Generator using Herwig as an external generator | |
20 | // The main Herwig options are accessable for the user through this interface. | |
21 | // Uses the THerwig implementation of TGenerator. | |
22 | ||
618e1dc0 | 23 | |
37b09b91 | 24 | #include <Riostream.h> |
25 | #include <TClonesArray.h> | |
618e1dc0 | 26 | #include <TParticle.h> |
618e1dc0 | 27 | |
37b09b91 | 28 | #include <THerwig6.h> |
618e1dc0 | 29 | |
37b09b91 | 30 | #include "AliGenHerwig.h" |
31 | #include "AliHerwigRndm.h" | |
32 | #include "AliMC.h" | |
33 | #include "AliRun.h" | |
e2054d85 | 34 | #include "driver.h" |
35 | ||
014a9521 | 36 | ClassImp(AliGenHerwig) |
618e1dc0 | 37 | |
7cdba479 | 38 | |
a1d47d99 | 39 | AliGenHerwig::AliGenHerwig() : |
40 | AliGenMC(), | |
7677b281 | 41 | fAutPDF("LHAPDF"), |
42 | fModPDF(19070), | |
2ad1e1c2 | 43 | fStrucFunc(kCTEQ5L), |
a1d47d99 | 44 | fKeep(0), |
45 | fDecaysOff(1), | |
46 | fTrigger(0), | |
47 | fSelectAll(0), | |
48 | fFlavor(0), | |
a1d47d99 | 49 | fMomentum1(7000), |
50 | fMomentum2(7000), | |
51 | fKineBias(1), | |
52 | fTrials(0), | |
53 | fXsection(0), | |
54 | fHerwig(0x0), | |
55 | fProcess(0), | |
2d654757 | 56 | fPtHardMin(0.), |
9305fc24 | 57 | fPtHardMax(9999.), |
2d654757 | 58 | fPtRMS(0.), |
a1d47d99 | 59 | fMaxPr(10), |
60 | fMaxErrors(1000), | |
e2054d85 | 61 | fEnSoft(1), |
62 | fEv1Pr(0), | |
2d654757 | 63 | fEv2Pr(0), |
9305fc24 | 64 | fFileName(0), |
65 | fEtaMinParton(-20.), | |
66 | fEtaMaxParton(20.), | |
67 | fPhiMinParton(0.), | |
68 | fPhiMaxParton(2.* TMath::Pi()), | |
69 | fEtaMinGamma(-20.), | |
70 | fEtaMaxGamma(20.), | |
71 | fPhiMinGamma(0.), | |
72 | fPhiMaxGamma(2. * TMath::Pi()) | |
618e1dc0 | 73 | { |
74 | // Constructor | |
fc7e1b1c | 75 | fEnergyCMS = 14000; |
618e1dc0 | 76 | } |
77 | ||
78 | AliGenHerwig::AliGenHerwig(Int_t npart) | |
2d654757 | 79 | :AliGenMC(npart), |
7677b281 | 80 | fAutPDF("LHAPDF"), |
81 | fModPDF(19070), | |
2d654757 | 82 | fStrucFunc(kCTEQ5L), |
83 | fKeep(0), | |
84 | fDecaysOff(1), | |
85 | fTrigger(0), | |
86 | fSelectAll(0), | |
87 | fFlavor(0), | |
2d654757 | 88 | fMomentum1(7000), |
89 | fMomentum2(7000), | |
90 | fKineBias(1), | |
91 | fTrials(0), | |
92 | fXsection(0), | |
93 | fHerwig(0x0), | |
94 | fProcess(0), | |
95 | fPtHardMin(0.), | |
9305fc24 | 96 | fPtHardMax(9999.), |
2d654757 | 97 | fPtRMS(0.), |
98 | fMaxPr(10), | |
99 | fMaxErrors(1000), | |
100 | fEnSoft(1), | |
101 | fEv1Pr(0), | |
102 | fEv2Pr(0), | |
9305fc24 | 103 | fFileName(0), |
104 | fEtaMinParton(-20.), | |
105 | fEtaMaxParton(20.), | |
106 | fPhiMinParton(0.), | |
107 | fPhiMaxParton(2.* TMath::Pi()), | |
108 | fEtaMinGamma(-20.), | |
109 | fEtaMaxGamma(20.), | |
110 | fPhiMinGamma(0.), | |
111 | fPhiMaxGamma(2. * TMath::Pi()) | |
618e1dc0 | 112 | { |
fc7e1b1c | 113 | fEnergyCMS = 14000; |
618e1dc0 | 114 | SetTarget(); |
115 | SetProjectile(); | |
7677b281 | 116 | // Set random number generator |
93831bcf | 117 | AliHerwigRndm::SetHerwigRandom(GetRandom()); |
618e1dc0 | 118 | } |
119 | ||
618e1dc0 | 120 | AliGenHerwig::~AliGenHerwig() |
121 | { | |
122 | // Destructor | |
123 | } | |
124 | ||
e2054d85 | 125 | void AliGenHerwig::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
126 | { | |
455f128d | 127 | fEv1Pr = eventFirst; |
128 | fEv2Pr = eventLast; | |
e2054d85 | 129 | if ( fEv2Pr == -1 ) fEv2Pr = fEv2Pr; |
130 | } | |
131 | ||
618e1dc0 | 132 | void AliGenHerwig::Init() |
133 | { | |
134 | // Initialisation | |
135 | fTarget.Resize(8); | |
136 | fProjectile.Resize(8); | |
137 | SetMC(new THerwig6()); | |
d274cd60 | 138 | fHerwig=(THerwig6*) fMCEvGen; |
618e1dc0 | 139 | // initialize common blocks |
455f128d | 140 | fHerwig->Initialize(fProjectile.Data(), fTarget.Data(), fMomentum1, fMomentum2, fProcess); // |
618e1dc0 | 141 | // reset parameters according to user needs |
142 | InitPDF(); | |
143 | fHerwig->SetPTMIN(fPtHardMin); | |
7a5495ad | 144 | fHerwig->SetPTMAX(fPtHardMax); |
618e1dc0 | 145 | fHerwig->SetPTRMS(fPtRMS); |
146 | fHerwig->SetMAXPR(fMaxPr); | |
147 | fHerwig->SetMAXER(fMaxErrors); | |
148 | fHerwig->SetENSOF(fEnSoft); | |
e2054d85 | 149 | // C---D,U,S,C,B,T QUARK AND GLUON MASSES (IN THAT ORDER) |
150 | // RMASS(1)=0.32 | |
151 | // RMASS(2)=0.32 | |
152 | // RMASS(3)=0.5 | |
153 | // RMASS(4)=1.55 | |
7677b281 | 154 | // RMASS(5)=4.75 |
e2054d85 | 155 | // RMASS(6)=174.3 |
156 | // RMASS(13)=0.75 | |
157 | ||
158 | fHerwig->SetRMASS(4,1.2); | |
159 | fHerwig->SetRMASS(5,4.75); | |
7677b281 | 160 | |
e2054d85 | 161 | if ( fProcess < 0 ) strncpy(VVJIN.QQIN,fFileName.Data(),50); |
162 | ||
9305fc24 | 163 | //fHerwig->Hwusta("PI0 "); |
e2054d85 | 164 | |
618e1dc0 | 165 | // compute parameter dependent constants |
166 | fHerwig->PrepareRun(); | |
167 | } | |
168 | ||
7677b281 | 169 | void AliGenHerwig::InitJimmy() |
170 | { | |
171 | // Initialisation | |
172 | fTarget.Resize(8); | |
173 | fProjectile.Resize(8); | |
174 | SetMC(new THerwig6()); | |
175 | fHerwig=(THerwig6*) fMCEvGen; | |
176 | // initialize common blocks | |
177 | fHerwig->InitializeJimmy(fProjectile, fTarget, fMomentum1, fMomentum2, fProcess); | |
178 | // reset parameters according to user needs | |
179 | InitPDF(); | |
180 | fHerwig->SetPTMIN(fPtHardMin); | |
181 | fHerwig->SetPTRMS(fPtRMS); | |
182 | fHerwig->SetMAXPR(fMaxPr); | |
183 | fHerwig->SetMAXER(fMaxErrors); | |
184 | fHerwig->SetENSOF(fEnSoft); | |
185 | ||
7677b281 | 186 | // C---D,U,S,C,B,T QUARK AND GLUON MASSES (IN THAT ORDER) |
187 | // RMASS(1)=0.32 | |
188 | // RMASS(2)=0.32 | |
189 | // RMASS(3)=0.5 | |
190 | // RMASS(4)=1.55 | |
191 | // RMASS(5)=4.75 | |
192 | // RMASS(6)=174.3 | |
193 | // RMASS(13)=0.75 | |
194 | ||
195 | fHerwig->SetRMASS(4,1.2); | |
196 | fHerwig->SetRMASS(5,4.75); | |
197 | ||
198 | if ( fProcess < 0 ) strncpy(VVJIN.QQIN,fFileName.Data(),50); | |
199 | ||
9305fc24 | 200 | // fHerwig->Hwusta("PI0 "); |
7677b281 | 201 | |
202 | // compute parameter dependent constants | |
203 | fHerwig->PrepareRunJimmy(); | |
204 | } | |
205 | ||
618e1dc0 | 206 | void AliGenHerwig::InitPDF() |
207 | { | |
208 | switch(fStrucFunc) | |
209 | { | |
7677b281 | 210 | // ONLY USES LHAPDF STRUCTURE FUNCTIONS |
618e1dc0 | 211 | case kGRVLO98: |
7677b281 | 212 | fModPDF=80060; |
213 | fAutPDF="HWLHAPDF"; | |
618e1dc0 | 214 | break; |
7677b281 | 215 | case kCTEQ6: |
216 | fModPDF=10040; | |
217 | fAutPDF="HWLHAPDF"; | |
218 | break; | |
219 | case kCTEQ61: | |
220 | fModPDF=10100; | |
221 | fAutPDF="HWLHAPDF"; | |
222 | break; | |
223 | case kCTEQ6m: | |
224 | fModPDF=10050; | |
225 | fAutPDF="HWLHAPDF"; | |
226 | break; | |
227 | case kCTEQ6l: | |
228 | fModPDF=10041; | |
229 | fAutPDF="HWLHAPDF"; | |
230 | break; | |
231 | case kCTEQ6ll: | |
232 | fModPDF=10042; | |
233 | fAutPDF="HWLHAPDF"; | |
234 | break; | |
235 | case kCTEQ5M: | |
236 | fModPDF=19050; | |
237 | fAutPDF="HWLHAPDF"; | |
618e1dc0 | 238 | break; |
239 | case kCTEQ5L: | |
7677b281 | 240 | fModPDF=19070; |
241 | fAutPDF="HWLHAPDF"; | |
242 | break; | |
243 | case kCTEQ4M: | |
244 | fModPDF=19150; | |
245 | fAutPDF="HWLHAPDF"; | |
246 | break; | |
247 | case kCTEQ4L: | |
248 | fModPDF=19170; | |
249 | fAutPDF="HWLHAPDF"; | |
250 | break; | |
56174e25 | 251 | // case kMRST2004nlo: |
252 | // fModPDF=20400; | |
253 | // fAutPDF="HWLHAPDF"; | |
254 | // break; | |
618e1dc0 | 255 | default: |
256 | cerr << "This structure function is not inplemented " << fStrucFunc << endl; | |
257 | break; | |
258 | } | |
7677b281 | 259 | fAutPDF.Resize(20); |
618e1dc0 | 260 | fHerwig->SetMODPDF(1,fModPDF); |
261 | fHerwig->SetMODPDF(2,fModPDF); | |
262 | fHerwig->SetAUTPDF(1,fAutPDF); | |
263 | fHerwig->SetAUTPDF(2,fAutPDF); | |
264 | } | |
265 | ||
266 | void AliGenHerwig::Generate() | |
267 | { | |
268 | // Generate one event | |
269 | ||
270 | Float_t polar[3] = {0,0,0}; | |
271 | Float_t origin[3]= {0,0,0}; | |
272 | Float_t origin0[3]= {0,0,0}; | |
273 | Float_t p[4], random[6]; | |
7677b281 | 274 | |
618e1dc0 | 275 | static TClonesArray *particles; |
276 | // converts from mm/c to s | |
277 | const Float_t kconv=0.001/2.999792458e8; | |
278 | // | |
279 | Int_t nt=0; | |
280 | Int_t jev=0; | |
281 | Int_t j, kf, ks, imo; | |
282 | kf=0; | |
7677b281 | 283 | |
618e1dc0 | 284 | if(!particles) particles=new TClonesArray("TParticle",10000); |
7677b281 | 285 | |
618e1dc0 | 286 | fTrials=0; |
287 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; | |
288 | if(fVertexSmear==kPerEvent) { | |
289 | Rndm(random,6); | |
290 | for (j=0;j<3;j++) { | |
291 | origin0[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
292 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
293 | } | |
294 | } | |
7677b281 | 295 | |
618e1dc0 | 296 | while(1) |
297 | { | |
298 | fHerwig->GenerateEvent(); | |
299 | fTrials++; | |
300 | fHerwig->ImportParticles(particles,"All"); | |
301 | Int_t np = particles->GetEntriesFast()-1; | |
302 | if (np == 0 ) continue; | |
7677b281 | 303 | |
9305fc24 | 304 | //Check hard partons or direct gamma in kine range |
305 | ||
306 | if (fProcess == kHeJets || fProcess == kHeDirectGamma) { | |
307 | TParticle* parton1 = (TParticle *) particles->At(6); | |
308 | TParticle* parton2 = (TParticle *) particles->At(7); | |
309 | if (!CheckParton(parton1, parton2)) continue ; | |
310 | } | |
311 | ||
455f128d | 312 | // |
313 | if (gAlice) { | |
314 | if (gAlice->GetEvNumber()>=fEv1Pr && | |
315 | gAlice->GetEvNumber()<=fEv2Pr) fHerwig->PrintEvt(); | |
316 | ||
317 | } | |
318 | ||
319 | ||
618e1dc0 | 320 | Int_t nc=0; |
7677b281 | 321 | |
618e1dc0 | 322 | Int_t * newPos = new Int_t[np]; |
323 | for (Int_t i = 0; i<np; i++) *(newPos+i)=-1; | |
7677b281 | 324 | |
618e1dc0 | 325 | for (Int_t i = 0; i<np; i++) { |
326 | TParticle * iparticle = (TParticle *) particles->At(i); | |
327 | imo = iparticle->GetFirstMother(); | |
328 | kf = iparticle->GetPdgCode(); | |
329 | ks = iparticle->GetStatusCode(); | |
7677b281 | 330 | if (ks != 3 && |
331 | KinematicSelection(iparticle,0)) | |
618e1dc0 | 332 | { |
333 | nc++; | |
334 | p[0]=iparticle->Px(); | |
335 | p[1]=iparticle->Py(); | |
336 | p[2]=iparticle->Pz(); | |
337 | p[3]=iparticle->Energy(); | |
338 | origin[0]=origin0[0]+iparticle->Vx()/10; | |
339 | origin[1]=origin0[1]+iparticle->Vy()/10; | |
340 | origin[2]=origin0[2]+iparticle->Vz()/10; | |
341 | Float_t tof = kconv*iparticle->T(); | |
342 | Int_t iparent = (imo > -1) ? newPos[imo] : -1; | |
343 | Int_t trackIt = (ks == 1) && fTrackIt; | |
93831bcf | 344 | PushTrack(trackIt, iparent, kf, |
345 | p[0], p[1], p[2], p[3], | |
7677b281 | 346 | origin[0], origin[1], origin[2], |
93831bcf | 347 | tof, |
348 | polar[0], polar[1], polar[2], | |
e2054d85 | 349 | kPPrimary, nt, fHerwig->GetEVWGT(), ks); |
618e1dc0 | 350 | KeepTrack(nt); |
351 | newPos[i]=nt; | |
352 | } // end of if: selection of particle | |
353 | } // end of for: particle loop | |
354 | if (newPos) delete[] newPos; | |
618e1dc0 | 355 | // MakeHeader(); |
618e1dc0 | 356 | if (nc > 0) { |
357 | jev+=nc; | |
358 | if (jev >= fNpart || fNpart == -1) { | |
359 | fKineBias=Float_t(fNpart)/Float_t(fTrials); | |
618e1dc0 | 360 | break; |
361 | } | |
362 | } | |
363 | } | |
364 | SetHighWaterMark(nt); | |
365 | // adjust weight due to kinematic selection | |
366 | AdjustWeights(); | |
367 | // get cross-section | |
368 | fXsection=fHerwig->GetAVWGT(); | |
9305fc24 | 369 | //printf(">> trials << %d\n",fTrials); |
370 | } | |
371 | ||
372 | Bool_t AliGenHerwig::CheckParton(TParticle* parton1, TParticle* parton2) | |
373 | { | |
374 | // Check the kinematic trigger condition | |
375 | // | |
376 | //Select events with parton max energy | |
377 | if(fPtHardMax < parton1->Pt()) return kFALSE; | |
378 | ||
379 | // Select events within angular window | |
380 | Double_t eta[2]; | |
381 | eta[0] = parton1->Eta(); | |
382 | eta[1] = parton2->Eta(); | |
383 | Double_t phi[2]; | |
384 | phi[0] = parton1->Phi(); | |
385 | phi[1] = parton2->Phi(); | |
386 | Int_t pdg[2]; | |
387 | pdg[0] = parton1->GetPdgCode(); | |
388 | pdg[1] = parton2->GetPdgCode(); | |
389 | printf("min %f, max %f\n",fPtHardMin, fPtHardMax); | |
390 | printf("Parton 1: %s, pT= %2.2f, eta = %1.2f, phi = %2.2f\n", parton1->GetName(),parton1->Pt(), eta[0],phi[0]*TMath::RadToDeg()); | |
391 | printf("Parton 2: %s, pT= %2.2f, eta = %1.2f, phi = %2.2f\n", parton2->GetName(),parton2->Pt(), eta[1],phi[1]*TMath::RadToDeg()); | |
392 | ||
393 | if (fProcess == kHeJets) { | |
394 | //Check if one of the 2 outgoing partons are in the eta-phi window | |
395 | for(Int_t i = 0; i < 2; i++) | |
396 | if ((eta[i] < fEtaMaxParton && eta[i] > fEtaMinParton) && | |
397 | (phi[i] < fPhiMaxParton && phi[i] > fPhiMinParton)) return kTRUE ; | |
398 | } | |
399 | ||
400 | else { | |
401 | //Check if the gamma and the jet are in the eta-phi window | |
402 | Int_t igj = 0; | |
403 | Int_t ijj = 0; | |
404 | if(pdg[0] == 22) ijj=1; | |
405 | else igj=1; | |
406 | if ((eta[ijj] < fEtaMaxParton && eta[ijj] > fEtaMinParton) && | |
407 | (phi[ijj] < fPhiMaxParton && phi[ijj] > fPhiMinParton)) { | |
408 | ||
409 | if ((eta[igj] < fEtaMaxGamma && eta[igj] > fEtaMinGamma) && | |
410 | (phi[igj] < fPhiMaxGamma && phi[igj] > fPhiMinGamma)) return kTRUE; | |
411 | ||
412 | } | |
413 | } | |
414 | ||
415 | return kFALSE ; | |
618e1dc0 | 416 | } |
417 | ||
418 | void AliGenHerwig::AdjustWeights() | |
419 | { | |
420 | // Adjust the weights after generation of all events | |
421 | TParticle *part; | |
5d12ce38 | 422 | Int_t ntrack=gAlice->GetMCApp()->GetNtrack(); |
618e1dc0 | 423 | for (Int_t i=0; i<ntrack; i++) { |
5d12ce38 | 424 | part= gAlice->GetMCApp()->Particle(i); |
618e1dc0 | 425 | part->SetWeight(part->GetWeight()*fKineBias); |
426 | } | |
427 | } | |
7677b281 | 428 | |
618e1dc0 | 429 | |
430 | void AliGenHerwig::KeepFullEvent() | |
431 | { | |
432 | fKeep=1; | |
433 | } | |
434 | ||
435 | Bool_t AliGenHerwig::DaughtersSelection(TParticle* iparticle, TClonesArray* particles) | |
436 | { | |
437 | // | |
438 | // Looks recursively if one of the daughters has been selected | |
439 | // | |
440 | // printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
441 | Int_t imin=-1; | |
442 | Int_t imax=-1; | |
443 | Int_t i; | |
444 | Bool_t hasDaughters= (iparticle->GetFirstDaughter() >=0); | |
445 | Bool_t selected=kFALSE; | |
446 | if (hasDaughters) { | |
447 | imin=iparticle->GetFirstDaughter(); | |
7677b281 | 448 | imax=iparticle->GetLastDaughter(); |
618e1dc0 | 449 | for (i=imin; i<= imax; i++){ |
7677b281 | 450 | TParticle * jparticle = (TParticle *) particles->At(i); |
618e1dc0 | 451 | Int_t ip=jparticle->GetPdgCode(); |
452 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { | |
453 | selected=kTRUE; break; | |
454 | } | |
455 | if (DaughtersSelection(jparticle, particles)) {selected=kTRUE; break; } | |
456 | } | |
457 | } else { | |
458 | return kFALSE; | |
459 | } | |
460 | ||
461 | return selected; | |
462 | } | |
463 | ||
464 | ||
465 | Bool_t AliGenHerwig::SelectFlavor(Int_t pid) | |
466 | { | |
467 | // Select flavor of particle | |
468 | // 0: all | |
469 | // 4: charm and beauty | |
470 | // 5: beauty | |
471 | if (fFlavor == 0) return kTRUE; | |
7677b281 | 472 | |
618e1dc0 | 473 | Int_t ifl=TMath::Abs(pid/100); |
474 | if (ifl > 10) ifl/=10; | |
475 | return (fFlavor == ifl); | |
476 | } | |
477 | ||
478 | Bool_t AliGenHerwig::Stable(TParticle* particle) | |
479 | { | |
480 | // Return true for a stable particle | |
481 | // | |
482 | Int_t kf = TMath::Abs(particle->GetPdgCode()); | |
7677b281 | 483 | |
618e1dc0 | 484 | if ( (particle->GetFirstDaughter() < 0 ) || (kf == 1000*fFlavor+122)) |
7677b281 | 485 | |
618e1dc0 | 486 | { |
487 | return kTRUE; | |
488 | } else { | |
489 | return kFALSE; | |
490 | } | |
491 | } | |
492 | ||
493 | void AliGenHerwig::FinishRun() | |
494 | { | |
495 | fHerwig->Hwefin(); | |
496 | } | |
497 | ||
7677b281 | 498 | void AliGenHerwig::FinishRunJimmy() |
499 | { | |
500 | fHerwig->Hwefin(); | |
501 | fHerwig->Jmefin(); | |
502 | ||
503 | } | |
618e1dc0 | 504 |