]>
Commit | Line | Data |
---|---|---|
4c039060 | 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 | /* | |
17 | $Log$ | |
b9817493 | 18 | Revision 1.50 2002/03/03 13:48:50 morsch |
19 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
20 | NLO calculations (Nicola Carrer). | |
21 | ||
fbd1348b | 22 | Revision 1.49 2002/02/08 16:50:50 morsch |
23 | Add name and title in constructor. | |
24 | ||
8b31bfac | 25 | Revision 1.48 2001/12/20 11:44:28 morsch |
26 | Add kinematic bias for direct gamma production. | |
27 | ||
b2bb450d | 28 | Revision 1.47 2001/12/19 14:45:00 morsch |
29 | Store number of trials in header. | |
30 | ||
fd8fb861 | 31 | Revision 1.46 2001/12/19 10:36:19 morsch |
32 | Add possibility if jet kinematic biasing. | |
33 | ||
988b118b | 34 | Revision 1.45 2001/11/28 08:06:52 morsch |
35 | Use fMaxLifeTime parameter. | |
36 | ||
8cdfd303 | 37 | Revision 1.44 2001/11/27 13:13:07 morsch |
38 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
39 | It can be set via SetMaximumLifetime(..). | |
40 | ||
47fc6bd5 | 41 | Revision 1.43 2001/10/21 18:35:56 hristov |
42 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
43 | ||
2685bf00 | 44 | Revision 1.42 2001/10/15 08:21:55 morsch |
45 | Vertex truncation settings moved to AliGenMC. | |
46 | ||
4c07486d | 47 | Revision 1.41 2001/10/08 08:45:42 morsch |
48 | Possibility of vertex cut added. | |
49 | ||
a0b2b296 | 50 | Revision 1.40 2001/09/25 11:30:23 morsch |
51 | Pass event vertex to header. | |
52 | ||
c5d36e84 | 53 | Revision 1.39 2001/07/27 17:09:36 morsch |
54 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
55 | to delegate either to local stack or to stack owned by AliRun. | |
56 | (Piotr Skowronski, A.M.) | |
57 | ||
a99cf51f | 58 | Revision 1.38 2001/07/13 10:58:54 morsch |
59 | - Some coded moved to AliGenMC | |
60 | - Improved handling of secondary vertices. | |
61 | ||
fff02fee | 62 | Revision 1.37 2001/06/28 11:17:28 morsch |
63 | SetEventListRange setter added. Events in specified range are listed for | |
64 | debugging. (Yuri Kharlov) | |
65 | ||
11dfaf8d | 66 | Revision 1.36 2001/03/30 07:05:49 morsch |
67 | Final print-out in finish run. | |
68 | Write parton system for jet-production (preliminary solution). | |
69 | ||
9be6226f | 70 | Revision 1.35 2001/03/09 13:03:40 morsch |
71 | Process_t and Struc_Func_t moved to AliPythia.h | |
72 | ||
f1a48a38 | 73 | Revision 1.34 2001/02/14 15:50:40 hristov |
74 | The last particle in event marked using SetHighWaterMark | |
75 | ||
28adac24 | 76 | Revision 1.33 2001/01/30 09:23:12 hristov |
77 | Streamers removed (R.Brun) | |
78 | ||
a8a6107b | 79 | Revision 1.32 2001/01/26 19:55:51 hristov |
80 | Major upgrade of AliRoot code | |
81 | ||
2ab0c725 | 82 | Revision 1.31 2001/01/17 10:54:31 hristov |
83 | Better protection against FPE | |
84 | ||
0f9e52a3 | 85 | Revision 1.30 2000/12/18 08:55:35 morsch |
86 | Make AliPythia dependent generartors work with new scheme of random number generation | |
87 | ||
3356c022 | 88 | Revision 1.29 2000/12/04 11:22:03 morsch |
89 | Init of sRandom as in 1.15 | |
90 | ||
097ec7c1 | 91 | Revision 1.28 2000/12/02 11:41:39 morsch |
92 | Use SetRandom() to initialize random number generator in constructor. | |
93 | ||
1ed25e11 | 94 | Revision 1.27 2000/11/30 20:29:02 morsch |
95 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
96 | ||
ad1df918 | 97 | Revision 1.26 2000/11/30 07:12:50 alibrary |
98 | Introducing new Rndm and QA classes | |
99 | ||
65fb704d | 100 | Revision 1.25 2000/10/18 19:11:27 hristov |
101 | Division by zero fixed | |
102 | ||
919c2096 | 103 | Revision 1.24 2000/09/18 10:41:35 morsch |
104 | Add possibility to use nuclear structure functions from PDF library V8. | |
105 | ||
811826d8 | 106 | Revision 1.23 2000/09/14 14:05:40 morsch |
107 | dito | |
108 | ||
819f84ad | 109 | Revision 1.22 2000/09/14 14:02:22 morsch |
110 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
111 | - Correct handling of fForceDecay == all. | |
112 | ||
4451ef92 | 113 | Revision 1.21 2000/09/12 14:14:55 morsch |
114 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
115 | ||
00d6ce7d | 116 | Revision 1.20 2000/09/06 14:29:33 morsch |
117 | Use AliPythia for event generation an AliDecayPythia for decays. | |
118 | Correct handling of "nodecay" option | |
119 | ||
18edb254 | 120 | Revision 1.19 2000/07/11 18:24:56 fca |
121 | Coding convention corrections + few minor bug fixes | |
122 | ||
aee8290b | 123 | Revision 1.18 2000/06/30 12:40:34 morsch |
124 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
125 | Geant units (cm). | |
126 | ||
1512e357 | 127 | Revision 1.17 2000/06/09 20:34:07 morsch |
128 | All coding rule violations except RS3 corrected | |
129 | ||
f87cfe57 | 130 | Revision 1.16 2000/05/15 15:04:20 morsch |
131 | The full event is written for fNtrack = -1 | |
132 | Coding rule violations corrected. | |
133 | ||
5ddeb374 | 134 | Revision 1.15 2000/04/26 10:14:24 morsch |
135 | Particles array has one entry more than pythia particle list. Upper bound of | |
136 | particle loop changed to np-1 (R. Guernane, AM) | |
137 | ||
2a0e6f5b | 138 | Revision 1.14 2000/04/05 08:36:13 morsch |
139 | Check status code of particles in Pythia event | |
140 | to avoid double counting as partonic state and final state particle. | |
141 | ||
23211d3e | 142 | Revision 1.13 1999/11/09 07:38:48 fca |
143 | Changes for compatibility with version 2.23 of ROOT | |
144 | ||
084c1b4a | 145 | Revision 1.12 1999/11/03 17:43:20 fca |
146 | New version from G.Martinez & A.Morsch | |
147 | ||
886b6f73 | 148 | Revision 1.11 1999/09/29 09:24:14 fca |
149 | Introduction of the Copyright and cvs Log | |
4c039060 | 150 | */ |
151 | ||
fe4da5cc | 152 | #include "AliGenPythia.h" |
fff02fee | 153 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 154 | #include "AliDecayerPythia.h" |
fe4da5cc | 155 | #include "AliRun.h" |
156 | #include "AliPythia.h" | |
18edb254 | 157 | #include "AliPDG.h" |
1578254f | 158 | #include <TParticle.h> |
18edb254 | 159 | #include <TSystem.h> |
f87cfe57 | 160 | |
fe4da5cc | 161 | ClassImp(AliGenPythia) |
162 | ||
163 | AliGenPythia::AliGenPythia() | |
fff02fee | 164 | :AliGenMC() |
fe4da5cc | 165 | { |
18edb254 | 166 | // Default Constructor |
2685bf00 | 167 | fParticles = 0; |
168 | fPythia = 0; | |
988b118b | 169 | fDecayer = new AliDecayerPythia(); |
11dfaf8d | 170 | SetEventListRange(); |
988b118b | 171 | SetJetPhiRange(); |
172 | SetJetEtaRange(); | |
fe4da5cc | 173 | } |
174 | ||
175 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 176 | :AliGenMC(npart) |
fe4da5cc | 177 | { |
178 | // default charm production at 5. 5 TeV | |
179 | // semimuonic decay | |
180 | // structure function GRVHO | |
181 | // | |
8b31bfac | 182 | fName = "Pythia"; |
183 | fTitle= "Particle Generator using PYTHIA"; | |
fe4da5cc | 184 | fXsection = 0.; |
811826d8 | 185 | fNucA1=0; |
186 | fNucA2=0; | |
fe4da5cc | 187 | SetProcess(); |
188 | SetStrucFunc(); | |
886b6f73 | 189 | SetForceDecay(); |
fe4da5cc | 190 | SetPtHard(); |
191 | SetEnergyCMS(); | |
18edb254 | 192 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 193 | // Set random number generator |
097ec7c1 | 194 | sRandom=fRandom; |
fff02fee | 195 | fFlavorSelect = 0; |
196 | // Produced particles | |
197 | fParticles = new TClonesArray("TParticle",1000); | |
c5d36e84 | 198 | fEventVertex.Set(3); |
988b118b | 199 | SetEventListRange(); |
200 | SetJetPhiRange(); | |
201 | SetJetEtaRange(); | |
fe4da5cc | 202 | } |
203 | ||
f87cfe57 | 204 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
205 | { | |
206 | // copy constructor | |
207 | } | |
208 | ||
fe4da5cc | 209 | AliGenPythia::~AliGenPythia() |
210 | { | |
5ddeb374 | 211 | // Destructor |
fe4da5cc | 212 | } |
213 | ||
11dfaf8d | 214 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
215 | { | |
216 | // Set a range of event numbers, for which a table | |
217 | // of generated particle will be printed | |
218 | fDebugEventFirst = eventFirst; | |
219 | fDebugEventLast = eventLast; | |
220 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
221 | } | |
222 | ||
fe4da5cc | 223 | void AliGenPythia::Init() |
224 | { | |
5ddeb374 | 225 | // Initialisation |
18edb254 | 226 | SetMC(AliPythia::Instance()); |
fe4da5cc | 227 | fPythia=(AliPythia*) fgMCEvGen; |
228 | // | |
229 | fParentWeight=1./Float_t(fNpart); | |
230 | // | |
231 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 232 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 233 | fDecayer->Init(); |
00d6ce7d | 234 | |
18edb254 | 235 | |
fe4da5cc | 236 | fPythia->SetCKIN(3,fPtHardMin); |
237 | fPythia->SetCKIN(4,fPtHardMax); | |
811826d8 | 238 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
fe4da5cc | 239 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 240 | |
241 | // fPythia->Pylist(0); | |
242 | // fPythia->Pystat(2); | |
fe4da5cc | 243 | // Parent and Children Selection |
244 | switch (fProcess) | |
245 | { | |
f1a48a38 | 246 | case kPyCharm: |
f1a48a38 | 247 | case kPyCharmUnforced: |
fbd1348b | 248 | case kPyCharmPbMNR: |
b2bb450d | 249 | fParentSelect[0] = 411; |
250 | fParentSelect[1] = 421; | |
251 | fParentSelect[2] = 431; | |
252 | fParentSelect[3] = 4122; | |
8b31bfac | 253 | fFlavorSelect = 4; |
fe4da5cc | 254 | break; |
f1a48a38 | 255 | case kPyBeauty: |
fff02fee | 256 | fParentSelect[0]= 511; |
257 | fParentSelect[1]= 521; | |
258 | fParentSelect[2]= 531; | |
259 | fParentSelect[3]= 5122; | |
260 | fParentSelect[4]= 5132; | |
261 | fParentSelect[5]= 5232; | |
262 | fParentSelect[6]= 5332; | |
263 | fFlavorSelect = 5; | |
fe4da5cc | 264 | break; |
f1a48a38 | 265 | case kPyBeautyUnforced: |
fff02fee | 266 | fParentSelect[0] = 511; |
267 | fParentSelect[1] = 521; | |
268 | fParentSelect[2] = 531; | |
269 | fParentSelect[3] = 5122; | |
270 | fParentSelect[4] = 5132; | |
271 | fParentSelect[5] = 5232; | |
272 | fParentSelect[6] = 5332; | |
273 | fFlavorSelect = 5; | |
fe4da5cc | 274 | break; |
f1a48a38 | 275 | case kPyJpsiChi: |
276 | case kPyJpsi: | |
fff02fee | 277 | fParentSelect[0] = 443; |
fe4da5cc | 278 | break; |
f1a48a38 | 279 | case kPyMb: |
280 | case kPyJets: | |
281 | case kPyDirectGamma: | |
5be1fe76 | 282 | break; |
fe4da5cc | 283 | } |
fff02fee | 284 | AliGenMC::Init(); |
fe4da5cc | 285 | } |
286 | ||
287 | void AliGenPythia::Generate() | |
288 | { | |
5ddeb374 | 289 | // Generate one event |
00d6ce7d | 290 | fDecayer->ForceDecay(); |
a0b2b296 | 291 | |
9be6226f | 292 | Float_t polar[3] = {0,0,0}; |
293 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 294 | Float_t p[3]; |
5be1fe76 | 295 | // converts from mm/c to s |
296 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 297 | // |
fe4da5cc | 298 | Int_t nt=0; |
299 | Int_t jev=0; | |
7921755b | 300 | Int_t j, kf; |
fe4da5cc | 301 | fTrials=0; |
fff02fee | 302 | |
fd8fb861 | 303 | // Set collision vertex position |
aee8290b | 304 | if(fVertexSmear==kPerEvent) { |
1512e357 | 305 | fPythia->SetMSTP(151,1); |
fe4da5cc | 306 | for (j=0;j<3;j++) { |
fff02fee | 307 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 308 | } |
aee8290b | 309 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 310 | fPythia->SetMSTP(151,0); |
fe4da5cc | 311 | } |
fff02fee | 312 | // event loop |
fe4da5cc | 313 | while(1) |
314 | { | |
084c1b4a | 315 | fPythia->Pyevnt(); |
11dfaf8d | 316 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
317 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 318 | fTrials++; |
47fc6bd5 | 319 | |
fff02fee | 320 | fPythia->ImportParticles(fParticles,"All"); |
321 | ||
322 | // | |
323 | // | |
324 | // | |
325 | Int_t i; | |
326 | ||
327 | Int_t np = fParticles->GetEntriesFast(); | |
a0b2b296 | 328 | if (np == 0 ) continue; |
329 | // Get event vertex and discard the event if the Z coord. is too big | |
4c07486d | 330 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
331 | Float_t distz = iparticle->Vz()/10.; | |
332 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
a0b2b296 | 333 | // |
4c07486d | 334 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
335 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
336 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
a0b2b296 | 337 | // |
fff02fee | 338 | Int_t* pParent = new Int_t[np]; |
339 | Int_t* pSelected = new Int_t[np]; | |
340 | Int_t* trackIt = new Int_t[np]; | |
b9817493 | 341 | for (i=0; i< np; i++) { |
fff02fee | 342 | pParent[i] = -1; |
343 | pSelected[i] = 0; | |
344 | } | |
fe4da5cc | 345 | printf("\n **************************************************%d\n",np); |
fff02fee | 346 | Int_t nc = 0; |
f1a48a38 | 347 | if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma) { |
fd8fb861 | 348 | |
b9817493 | 349 | for (i = 0; i<np; i++) { |
c5d36e84 | 350 | iparticle = (TParticle *) fParticles->At(i); |
23211d3e | 351 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 352 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 353 | // No initial state partons |
2a0e6f5b | 354 | if (ks==21) continue; |
fe4da5cc | 355 | // |
fff02fee | 356 | // Heavy Flavor Selection |
5be1fe76 | 357 | // |
fff02fee | 358 | // quark ? |
359 | kf = TMath::Abs(kf); | |
360 | Int_t kfl = kf; | |
361 | // meson ? | |
362 | if (kfl > 10) kfl/=100; | |
363 | // baryon | |
364 | if (kfl > 10) kfl/=10; | |
365 | if (kfl > 10) kfl/=10; | |
366 | ||
367 | Int_t ipa = iparticle->GetFirstMother()-1; | |
368 | Int_t kfMo = 0; | |
369 | ||
370 | if (ipa > -1) { | |
371 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
372 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
373 | } | |
374 | // printf("\n particle (all) %d %d %d", i, pSelected[i], kf); | |
375 | if (kfl >= fFlavorSelect) { | |
5be1fe76 | 376 | // |
fff02fee | 377 | // Heavy flavor hadron or quark |
fe4da5cc | 378 | // |
fff02fee | 379 | // Kinematic seletion on final state heavy flavor mesons |
380 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
381 | { | |
382 | nc = -1; | |
383 | break; | |
384 | } | |
385 | pSelected[i] = 1; | |
386 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); | |
387 | } else { | |
388 | // Kinematic seletion on decay products | |
389 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
390 | && !KinematicSelection(iparticle, 1)) | |
391 | { | |
392 | nc = -1; | |
393 | break; | |
394 | } | |
fe4da5cc | 395 | // |
fff02fee | 396 | // Decay products |
397 | // Select if mother was selected and is not tracked | |
398 | ||
399 | if (pSelected[ipa] && | |
400 | !trackIt[ipa] && // mother will be tracked ? | |
401 | kfMo != 5 && // mother is b-quark, don't store fragments | |
402 | kfMo != 4 && // mother is c-quark, don't store fragments | |
403 | kf != 92) // don't store string | |
404 | { | |
fe4da5cc | 405 | // |
fff02fee | 406 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 407 | // |
5be1fe76 | 408 | // |
47fc6bd5 | 409 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
fff02fee | 410 | { |
411 | Int_t ipF = iparticle->GetFirstDaughter(); | |
412 | Int_t ipL = iparticle->GetLastDaughter(); | |
413 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
414 | } | |
415 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
416 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
417 | } | |
418 | } | |
419 | if (pSelected[i] == -1) pSelected[i] = 0; | |
420 | if (!pSelected[i]) continue; | |
421 | nc++; | |
422 | // Decision on tracking | |
423 | trackIt[i] = 0; | |
424 | // | |
425 | // Track final state particle | |
426 | if (ks == 1) trackIt[i] = 1; | |
427 | // Track semi-stable particles | |
8cdfd303 | 428 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
fff02fee | 429 | // Track particles selected by process if undecayed. |
430 | if (fForceDecay == kNoDecay) { | |
431 | if (ParentSelected(kf)) trackIt[i] = 1; | |
432 | } else { | |
433 | if (ParentSelected(kf)) trackIt[i] = 0; | |
434 | } | |
435 | // | |
436 | // | |
437 | ||
438 | } // particle selection loop | |
439 | if (nc > -1) { | |
b9817493 | 440 | for (i = 0; i<np; i++) { |
fff02fee | 441 | if (!pSelected[i]) continue; |
442 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
443 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
a0b2b296 | 444 | p[0] = iparticle->Px(); |
445 | p[1] = iparticle->Py(); | |
446 | p[2] = iparticle->Pz(); | |
447 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
448 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
449 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
450 | Float_t tof = kconv*iparticle->T(); | |
451 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fff02fee | 452 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a99cf51f | 453 | SetTrack(fTrackIt*trackIt[i] , |
fff02fee | 454 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1.); |
455 | pParent[i] = nt; | |
a99cf51f | 456 | KeepTrack(nt); |
fff02fee | 457 | } // SetTrack loop |
458 | } | |
459 | } else { | |
460 | nc = GenerateMB(); | |
5be1fe76 | 461 | } // mb ? |
fff02fee | 462 | |
b9817493 | 463 | if (pParent) delete[] pParent; |
464 | if (pSelected) delete[] pSelected; | |
465 | if (trackIt) delete[] trackIt; | |
466 | ||
fe4da5cc | 467 | if (nc > 0) { |
5be1fe76 | 468 | jev+=nc; |
5ddeb374 | 469 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 470 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 471 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
fd8fb861 | 472 | MakeHeader(); |
fe4da5cc | 473 | break; |
474 | } | |
475 | } | |
476 | } // event loop | |
a99cf51f | 477 | SetHighWaterMark(nt); |
fe4da5cc | 478 | // adjust weight due to kinematic selection |
479 | AdjustWeights(); | |
480 | // get cross-section | |
481 | fXsection=fPythia->GetPARI(1); | |
482 | } | |
483 | ||
fff02fee | 484 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 485 | { |
fff02fee | 486 | Int_t i, kf, nt, iparent; |
487 | Int_t nc = 0; | |
488 | Float_t p[3]; | |
489 | Float_t polar[3] = {0,0,0}; | |
490 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 491 | // converts from mm/c to s |
492 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 493 | |
fff02fee | 494 | Int_t np = fParticles->GetEntriesFast(); |
495 | Int_t* pParent = new Int_t[np]; | |
b9817493 | 496 | for (i=0; i< np; i++) pParent[i] = -1; |
b2bb450d | 497 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
988b118b | 498 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
499 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
500 | if (!CheckTrigger(jet1, jet2)) return 0; | |
501 | } | |
502 | ||
b9817493 | 503 | for (i = 0; i<np; i++) { |
fff02fee | 504 | Int_t trackIt = 0; |
505 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
506 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
507 | Int_t ks = iparticle->GetStatusCode(); | |
508 | Int_t km = iparticle->GetFirstMother(); | |
509 | // printf("\n Particle: %d %d %d", i, kf, ks); | |
510 | ||
511 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || | |
512 | (ks != 1) || | |
513 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
514 | nc++; | |
515 | if (ks == 1) trackIt = 1; | |
516 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fe4da5cc | 517 | |
fff02fee | 518 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
fe4da5cc | 519 | |
520 | // | |
fff02fee | 521 | // store track information |
a0b2b296 | 522 | p[0] = iparticle->Px(); |
523 | p[1] = iparticle->Py(); | |
524 | p[2] = iparticle->Pz(); | |
525 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
526 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
527 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
fff02fee | 528 | Float_t tof=kconv*iparticle->T(); |
a99cf51f | 529 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
a0b2b296 | 530 | tof, kPPrimary, nt); |
a99cf51f | 531 | KeepTrack(nt); |
fff02fee | 532 | pParent[i] = nt; |
533 | } // select particle | |
534 | } // particle loop | |
535 | ||
536 | if (pParent) delete[] pParent; | |
fe4da5cc | 537 | |
fff02fee | 538 | printf("\n I've put %i particles on the stack \n",nc); |
fff02fee | 539 | return nc; |
540 | } | |
fe4da5cc | 541 | |
fe4da5cc | 542 | |
fff02fee | 543 | void AliGenPythia::FinishRun() |
544 | { | |
545 | // Print x-section summary | |
546 | fPythia->Pystat(1); | |
fe4da5cc | 547 | } |
fff02fee | 548 | |
fe4da5cc | 549 | void AliGenPythia::AdjustWeights() |
550 | { | |
5ddeb374 | 551 | // Adjust the weights after generation of all events |
552 | // | |
5ddeb374 | 553 | TParticle *part; |
fe4da5cc | 554 | Int_t ntrack=gAlice->GetNtrack(); |
555 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 556 | part= gAlice->Particle(i); |
5ddeb374 | 557 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 558 | } |
559 | } | |
811826d8 | 560 | |
561 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
562 | { | |
563 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
564 | fNucA1 = a1; | |
565 | fNucA2 = a2; | |
566 | } | |
fff02fee | 567 | |
568 | ||
569 | void AliGenPythia::MakeHeader() | |
570 | { | |
571 | // Builds the event header, to be called after each event | |
572 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
c5d36e84 | 573 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
fd8fb861 | 574 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
c5d36e84 | 575 | header->SetPrimaryVertex(fEventVertex); |
576 | gAlice->SetGenEventHeader(header); | |
fff02fee | 577 | } |
811826d8 | 578 | |
988b118b | 579 | |
580 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) | |
581 | { | |
582 | // Check the kinematic trigger condition | |
583 | // | |
b2bb450d | 584 | Double_t eta[2]; |
585 | eta[0] = jet1->Eta(); | |
586 | eta[1] = jet2->Eta(); | |
587 | Double_t phi[2]; | |
588 | phi[0] = jet1->Phi(); | |
589 | phi[1] = jet2->Phi(); | |
590 | Int_t pdg[2]; | |
591 | pdg[0] = jet1->GetPdgCode(); | |
592 | pdg[1] = jet2->GetPdgCode(); | |
988b118b | 593 | Bool_t triggered = kFALSE; |
b2bb450d | 594 | |
595 | if (fProcess == kPyJets) { | |
596 | //Check eta range first... | |
597 | if ((eta[0] < fEtaMaxJet && eta[0] > fEtaMinJet) || | |
598 | (eta[1] < fEtaMaxJet && eta[1] > fEtaMinJet)) | |
599 | { | |
600 | //Eta is okay, now check phi range | |
601 | if ((phi[0] < fPhiMaxJet && phi[0] > fPhiMinJet) || | |
602 | (phi[1] < fPhiMaxJet && phi[1] > fPhiMinJet)) | |
603 | { | |
604 | triggered = kTRUE; | |
605 | } | |
606 | } | |
607 | } else { | |
608 | Int_t ij = 0; | |
609 | Int_t ig = 1; | |
610 | if (pdg[0] == kGamma) { | |
611 | ij = 1; | |
612 | ig = 0; | |
613 | } | |
614 | //Check eta range first... | |
615 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
616 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
617 | { | |
618 | //Eta is okay, now check phi range | |
619 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
620 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
621 | { | |
622 | triggered = kTRUE; | |
623 | } | |
624 | } | |
988b118b | 625 | } |
b2bb450d | 626 | |
627 | ||
988b118b | 628 | return triggered; |
629 | } | |
811826d8 | 630 | |
f87cfe57 | 631 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
632 | { | |
633 | // Assignment operator | |
634 | return *this; | |
635 | } | |
fe4da5cc | 636 | |
637 | ||
811826d8 | 638 | |
a8a6107b | 639 | #ifdef never |
18edb254 | 640 | void AliGenPythia::Streamer(TBuffer &R__b) |
641 | { | |
642 | // Stream an object of class AliGenPythia. | |
643 | ||
644 | if (R__b.IsReading()) { | |
645 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
646 | AliGenerator::Streamer(R__b); | |
647 | R__b >> (Int_t&)fProcess; | |
648 | R__b >> (Int_t&)fStrucFunc; | |
649 | R__b >> (Int_t&)fForceDecay; | |
650 | R__b >> fEnergyCMS; | |
651 | R__b >> fKineBias; | |
652 | R__b >> fTrials; | |
653 | fParentSelect.Streamer(R__b); | |
654 | fChildSelect.Streamer(R__b); | |
655 | R__b >> fXsection; | |
656 | // (AliPythia::Instance())->Streamer(R__b); | |
657 | R__b >> fPtHardMin; | |
658 | R__b >> fPtHardMax; | |
659 | // if (fDecayer) fDecayer->Streamer(R__b); | |
660 | } else { | |
661 | R__b.WriteVersion(AliGenPythia::IsA()); | |
662 | AliGenerator::Streamer(R__b); | |
663 | R__b << (Int_t)fProcess; | |
664 | R__b << (Int_t)fStrucFunc; | |
665 | R__b << (Int_t)fForceDecay; | |
666 | R__b << fEnergyCMS; | |
667 | R__b << fKineBias; | |
668 | R__b << fTrials; | |
669 | fParentSelect.Streamer(R__b); | |
670 | fChildSelect.Streamer(R__b); | |
671 | R__b << fXsection; | |
672 | // R__b << fPythia; | |
673 | R__b << fPtHardMin; | |
674 | R__b << fPtHardMax; | |
675 | // fDecayer->Streamer(R__b); | |
676 | } | |
677 | } | |
a8a6107b | 678 | #endif |
18edb254 | 679 |