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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 | $Log$ | |
6d4dd317 | 18 | Revision 1.54 2002/03/28 11:49:10 morsch |
19 | Pass status code in SetTrack. | |
20 | ||
5ec84200 | 21 | Revision 1.53 2002/03/25 14:51:13 morsch |
22 | New stack-fill and count options introduced (N. Carrer). | |
23 | ||
0d7c70a0 | 24 | Revision 1.51 2002/03/06 08:46:57 morsch |
25 | - Loop until np-1 | |
26 | - delete dyn. alloc. arrays (N. Carrer) | |
27 | ||
b9817493 | 28 | Revision 1.50 2002/03/03 13:48:50 morsch |
29 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
30 | NLO calculations (Nicola Carrer). | |
31 | ||
fbd1348b | 32 | Revision 1.49 2002/02/08 16:50:50 morsch |
33 | Add name and title in constructor. | |
34 | ||
8b31bfac | 35 | Revision 1.48 2001/12/20 11:44:28 morsch |
36 | Add kinematic bias for direct gamma production. | |
37 | ||
b2bb450d | 38 | Revision 1.47 2001/12/19 14:45:00 morsch |
39 | Store number of trials in header. | |
40 | ||
fd8fb861 | 41 | Revision 1.46 2001/12/19 10:36:19 morsch |
42 | Add possibility if jet kinematic biasing. | |
43 | ||
988b118b | 44 | Revision 1.45 2001/11/28 08:06:52 morsch |
45 | Use fMaxLifeTime parameter. | |
46 | ||
8cdfd303 | 47 | Revision 1.44 2001/11/27 13:13:07 morsch |
48 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
49 | It can be set via SetMaximumLifetime(..). | |
50 | ||
47fc6bd5 | 51 | Revision 1.43 2001/10/21 18:35:56 hristov |
52 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
53 | ||
2685bf00 | 54 | Revision 1.42 2001/10/15 08:21:55 morsch |
55 | Vertex truncation settings moved to AliGenMC. | |
56 | ||
4c07486d | 57 | Revision 1.41 2001/10/08 08:45:42 morsch |
58 | Possibility of vertex cut added. | |
59 | ||
a0b2b296 | 60 | Revision 1.40 2001/09/25 11:30:23 morsch |
61 | Pass event vertex to header. | |
62 | ||
c5d36e84 | 63 | Revision 1.39 2001/07/27 17:09:36 morsch |
64 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
65 | to delegate either to local stack or to stack owned by AliRun. | |
66 | (Piotr Skowronski, A.M.) | |
67 | ||
a99cf51f | 68 | Revision 1.38 2001/07/13 10:58:54 morsch |
69 | - Some coded moved to AliGenMC | |
70 | - Improved handling of secondary vertices. | |
71 | ||
fff02fee | 72 | Revision 1.37 2001/06/28 11:17:28 morsch |
73 | SetEventListRange setter added. Events in specified range are listed for | |
74 | debugging. (Yuri Kharlov) | |
75 | ||
11dfaf8d | 76 | Revision 1.36 2001/03/30 07:05:49 morsch |
77 | Final print-out in finish run. | |
78 | Write parton system for jet-production (preliminary solution). | |
79 | ||
9be6226f | 80 | Revision 1.35 2001/03/09 13:03:40 morsch |
81 | Process_t and Struc_Func_t moved to AliPythia.h | |
82 | ||
f1a48a38 | 83 | Revision 1.34 2001/02/14 15:50:40 hristov |
84 | The last particle in event marked using SetHighWaterMark | |
85 | ||
28adac24 | 86 | Revision 1.33 2001/01/30 09:23:12 hristov |
87 | Streamers removed (R.Brun) | |
88 | ||
a8a6107b | 89 | Revision 1.32 2001/01/26 19:55:51 hristov |
90 | Major upgrade of AliRoot code | |
91 | ||
2ab0c725 | 92 | Revision 1.31 2001/01/17 10:54:31 hristov |
93 | Better protection against FPE | |
94 | ||
0f9e52a3 | 95 | Revision 1.30 2000/12/18 08:55:35 morsch |
96 | Make AliPythia dependent generartors work with new scheme of random number generation | |
97 | ||
3356c022 | 98 | Revision 1.29 2000/12/04 11:22:03 morsch |
99 | Init of sRandom as in 1.15 | |
100 | ||
097ec7c1 | 101 | Revision 1.28 2000/12/02 11:41:39 morsch |
102 | Use SetRandom() to initialize random number generator in constructor. | |
103 | ||
1ed25e11 | 104 | Revision 1.27 2000/11/30 20:29:02 morsch |
105 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
106 | ||
ad1df918 | 107 | Revision 1.26 2000/11/30 07:12:50 alibrary |
108 | Introducing new Rndm and QA classes | |
109 | ||
65fb704d | 110 | Revision 1.25 2000/10/18 19:11:27 hristov |
111 | Division by zero fixed | |
112 | ||
919c2096 | 113 | Revision 1.24 2000/09/18 10:41:35 morsch |
114 | Add possibility to use nuclear structure functions from PDF library V8. | |
115 | ||
811826d8 | 116 | Revision 1.23 2000/09/14 14:05:40 morsch |
117 | dito | |
118 | ||
819f84ad | 119 | Revision 1.22 2000/09/14 14:02:22 morsch |
120 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
121 | - Correct handling of fForceDecay == all. | |
122 | ||
4451ef92 | 123 | Revision 1.21 2000/09/12 14:14:55 morsch |
124 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
125 | ||
00d6ce7d | 126 | Revision 1.20 2000/09/06 14:29:33 morsch |
127 | Use AliPythia for event generation an AliDecayPythia for decays. | |
128 | Correct handling of "nodecay" option | |
129 | ||
18edb254 | 130 | Revision 1.19 2000/07/11 18:24:56 fca |
131 | Coding convention corrections + few minor bug fixes | |
132 | ||
aee8290b | 133 | Revision 1.18 2000/06/30 12:40:34 morsch |
134 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
135 | Geant units (cm). | |
136 | ||
1512e357 | 137 | Revision 1.17 2000/06/09 20:34:07 morsch |
138 | All coding rule violations except RS3 corrected | |
139 | ||
f87cfe57 | 140 | Revision 1.16 2000/05/15 15:04:20 morsch |
141 | The full event is written for fNtrack = -1 | |
142 | Coding rule violations corrected. | |
143 | ||
5ddeb374 | 144 | Revision 1.15 2000/04/26 10:14:24 morsch |
145 | Particles array has one entry more than pythia particle list. Upper bound of | |
146 | particle loop changed to np-1 (R. Guernane, AM) | |
147 | ||
2a0e6f5b | 148 | Revision 1.14 2000/04/05 08:36:13 morsch |
149 | Check status code of particles in Pythia event | |
150 | to avoid double counting as partonic state and final state particle. | |
151 | ||
23211d3e | 152 | Revision 1.13 1999/11/09 07:38:48 fca |
153 | Changes for compatibility with version 2.23 of ROOT | |
154 | ||
084c1b4a | 155 | Revision 1.12 1999/11/03 17:43:20 fca |
156 | New version from G.Martinez & A.Morsch | |
157 | ||
886b6f73 | 158 | Revision 1.11 1999/09/29 09:24:14 fca |
159 | Introduction of the Copyright and cvs Log | |
4c039060 | 160 | */ |
161 | ||
6d4dd317 | 162 | // |
163 | // Generator using the TPythia interface (via AliPythia) | |
164 | // to generate pp collisions. | |
165 | // Using SetNuclei() also nuclear modifications to the structure functions | |
166 | // can be taken into account. This makes, of course, only sense for the | |
167 | // generation of the products of hard processes (heavy flavor, jets ...) | |
168 | // | |
169 | // andreas.morsch@cern.ch | |
170 | // | |
171 | ||
172 | ||
fe4da5cc | 173 | #include "AliGenPythia.h" |
fff02fee | 174 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 175 | #include "AliDecayerPythia.h" |
fe4da5cc | 176 | #include "AliRun.h" |
177 | #include "AliPythia.h" | |
18edb254 | 178 | #include "AliPDG.h" |
1578254f | 179 | #include <TParticle.h> |
18edb254 | 180 | #include <TSystem.h> |
f87cfe57 | 181 | |
fe4da5cc | 182 | ClassImp(AliGenPythia) |
183 | ||
184 | AliGenPythia::AliGenPythia() | |
fff02fee | 185 | :AliGenMC() |
fe4da5cc | 186 | { |
18edb254 | 187 | // Default Constructor |
2685bf00 | 188 | fParticles = 0; |
189 | fPythia = 0; | |
988b118b | 190 | fDecayer = new AliDecayerPythia(); |
11dfaf8d | 191 | SetEventListRange(); |
988b118b | 192 | SetJetPhiRange(); |
193 | SetJetEtaRange(); | |
fe4da5cc | 194 | } |
195 | ||
196 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 197 | :AliGenMC(npart) |
fe4da5cc | 198 | { |
199 | // default charm production at 5. 5 TeV | |
200 | // semimuonic decay | |
201 | // structure function GRVHO | |
202 | // | |
8b31bfac | 203 | fName = "Pythia"; |
204 | fTitle= "Particle Generator using PYTHIA"; | |
fe4da5cc | 205 | fXsection = 0.; |
811826d8 | 206 | fNucA1=0; |
207 | fNucA2=0; | |
fe4da5cc | 208 | SetProcess(); |
209 | SetStrucFunc(); | |
886b6f73 | 210 | SetForceDecay(); |
fe4da5cc | 211 | SetPtHard(); |
212 | SetEnergyCMS(); | |
18edb254 | 213 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 214 | // Set random number generator |
097ec7c1 | 215 | sRandom=fRandom; |
fff02fee | 216 | fFlavorSelect = 0; |
217 | // Produced particles | |
218 | fParticles = new TClonesArray("TParticle",1000); | |
c5d36e84 | 219 | fEventVertex.Set(3); |
988b118b | 220 | SetEventListRange(); |
221 | SetJetPhiRange(); | |
222 | SetJetEtaRange(); | |
719b6b8a | 223 | // Options determining what to keep in the stack (Heavy flavour generation) |
224 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor | |
225 | fFeedDownOpt = kTRUE; // allow feed down from higher family | |
226 | // Fragmentation on/off | |
227 | fFragmentation = kTRUE; | |
228 | // Default counting mode | |
229 | fCountMode = kCountAll; | |
fe4da5cc | 230 | } |
231 | ||
f87cfe57 | 232 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
233 | { | |
234 | // copy constructor | |
6d4dd317 | 235 | Pythia.Copy(*this); |
f87cfe57 | 236 | } |
237 | ||
fe4da5cc | 238 | AliGenPythia::~AliGenPythia() |
239 | { | |
5ddeb374 | 240 | // Destructor |
fe4da5cc | 241 | } |
242 | ||
11dfaf8d | 243 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
244 | { | |
245 | // Set a range of event numbers, for which a table | |
246 | // of generated particle will be printed | |
247 | fDebugEventFirst = eventFirst; | |
248 | fDebugEventLast = eventLast; | |
249 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
250 | } | |
251 | ||
fe4da5cc | 252 | void AliGenPythia::Init() |
253 | { | |
5ddeb374 | 254 | // Initialisation |
18edb254 | 255 | SetMC(AliPythia::Instance()); |
fe4da5cc | 256 | fPythia=(AliPythia*) fgMCEvGen; |
257 | // | |
258 | fParentWeight=1./Float_t(fNpart); | |
259 | // | |
260 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 261 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 262 | fDecayer->Init(); |
00d6ce7d | 263 | |
18edb254 | 264 | |
fe4da5cc | 265 | fPythia->SetCKIN(3,fPtHardMin); |
266 | fPythia->SetCKIN(4,fPtHardMax); | |
811826d8 | 267 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
719b6b8a | 268 | // Fragmentation? |
269 | if (fFragmentation) { | |
270 | fPythia->SetMSTP(111,1); | |
271 | } else { | |
272 | fPythia->SetMSTP(111,0); | |
273 | } | |
274 | ||
fe4da5cc | 275 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 276 | |
277 | // fPythia->Pylist(0); | |
278 | // fPythia->Pystat(2); | |
fe4da5cc | 279 | // Parent and Children Selection |
280 | switch (fProcess) | |
281 | { | |
f1a48a38 | 282 | case kPyCharm: |
f1a48a38 | 283 | case kPyCharmUnforced: |
fbd1348b | 284 | case kPyCharmPbMNR: |
b2bb450d | 285 | fParentSelect[0] = 411; |
286 | fParentSelect[1] = 421; | |
287 | fParentSelect[2] = 431; | |
288 | fParentSelect[3] = 4122; | |
8b31bfac | 289 | fFlavorSelect = 4; |
fe4da5cc | 290 | break; |
719b6b8a | 291 | case kPyD0PbMNR: |
292 | fParentSelect[0] = 421; | |
293 | fFlavorSelect = 4; | |
294 | break; | |
f1a48a38 | 295 | case kPyBeauty: |
fff02fee | 296 | fParentSelect[0]= 511; |
297 | fParentSelect[1]= 521; | |
298 | fParentSelect[2]= 531; | |
299 | fParentSelect[3]= 5122; | |
300 | fParentSelect[4]= 5132; | |
301 | fParentSelect[5]= 5232; | |
302 | fParentSelect[6]= 5332; | |
303 | fFlavorSelect = 5; | |
fe4da5cc | 304 | break; |
f1a48a38 | 305 | case kPyBeautyUnforced: |
fff02fee | 306 | fParentSelect[0] = 511; |
307 | fParentSelect[1] = 521; | |
308 | fParentSelect[2] = 531; | |
309 | fParentSelect[3] = 5122; | |
310 | fParentSelect[4] = 5132; | |
311 | fParentSelect[5] = 5232; | |
312 | fParentSelect[6] = 5332; | |
313 | fFlavorSelect = 5; | |
fe4da5cc | 314 | break; |
f1a48a38 | 315 | case kPyJpsiChi: |
316 | case kPyJpsi: | |
fff02fee | 317 | fParentSelect[0] = 443; |
fe4da5cc | 318 | break; |
f1a48a38 | 319 | case kPyMb: |
320 | case kPyJets: | |
321 | case kPyDirectGamma: | |
5be1fe76 | 322 | break; |
fe4da5cc | 323 | } |
fff02fee | 324 | AliGenMC::Init(); |
fe4da5cc | 325 | } |
326 | ||
327 | void AliGenPythia::Generate() | |
328 | { | |
5ddeb374 | 329 | // Generate one event |
00d6ce7d | 330 | fDecayer->ForceDecay(); |
a0b2b296 | 331 | |
9be6226f | 332 | Float_t polar[3] = {0,0,0}; |
333 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 334 | Float_t p[3]; |
5be1fe76 | 335 | // converts from mm/c to s |
336 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 337 | // |
fe4da5cc | 338 | Int_t nt=0; |
339 | Int_t jev=0; | |
7921755b | 340 | Int_t j, kf; |
fe4da5cc | 341 | fTrials=0; |
fff02fee | 342 | |
fd8fb861 | 343 | // Set collision vertex position |
aee8290b | 344 | if(fVertexSmear==kPerEvent) { |
1512e357 | 345 | fPythia->SetMSTP(151,1); |
fe4da5cc | 346 | for (j=0;j<3;j++) { |
fff02fee | 347 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 348 | } |
aee8290b | 349 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 350 | fPythia->SetMSTP(151,0); |
fe4da5cc | 351 | } |
fff02fee | 352 | // event loop |
fe4da5cc | 353 | while(1) |
354 | { | |
084c1b4a | 355 | fPythia->Pyevnt(); |
11dfaf8d | 356 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
357 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 358 | fTrials++; |
47fc6bd5 | 359 | |
fff02fee | 360 | fPythia->ImportParticles(fParticles,"All"); |
361 | ||
362 | // | |
363 | // | |
364 | // | |
365 | Int_t i; | |
366 | ||
367 | Int_t np = fParticles->GetEntriesFast(); | |
a0b2b296 | 368 | if (np == 0 ) continue; |
369 | // Get event vertex and discard the event if the Z coord. is too big | |
4c07486d | 370 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
371 | Float_t distz = iparticle->Vz()/10.; | |
372 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
a0b2b296 | 373 | // |
4c07486d | 374 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
375 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
376 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
a0b2b296 | 377 | // |
fff02fee | 378 | Int_t* pParent = new Int_t[np]; |
379 | Int_t* pSelected = new Int_t[np]; | |
380 | Int_t* trackIt = new Int_t[np]; | |
b9817493 | 381 | for (i=0; i< np; i++) { |
fff02fee | 382 | pParent[i] = -1; |
383 | pSelected[i] = 0; | |
719b6b8a | 384 | trackIt[i] = 0; |
fff02fee | 385 | } |
719b6b8a | 386 | // printf("\n **************************************************%d\n",np); |
387 | Int_t nc = 0; // Total n. of selected particles | |
388 | Int_t nParents = 0; // Selected parents | |
389 | Int_t nTkbles = 0; // Trackable particles | |
f1a48a38 | 390 | if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma) { |
fd8fb861 | 391 | |
b9817493 | 392 | for (i = 0; i<np; i++) { |
c5d36e84 | 393 | iparticle = (TParticle *) fParticles->At(i); |
23211d3e | 394 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 395 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 396 | // No initial state partons |
2a0e6f5b | 397 | if (ks==21) continue; |
fe4da5cc | 398 | // |
fff02fee | 399 | // Heavy Flavor Selection |
5be1fe76 | 400 | // |
fff02fee | 401 | // quark ? |
402 | kf = TMath::Abs(kf); | |
403 | Int_t kfl = kf; | |
404 | // meson ? | |
405 | if (kfl > 10) kfl/=100; | |
406 | // baryon | |
407 | if (kfl > 10) kfl/=10; | |
408 | if (kfl > 10) kfl/=10; | |
409 | ||
410 | Int_t ipa = iparticle->GetFirstMother()-1; | |
411 | Int_t kfMo = 0; | |
412 | ||
413 | if (ipa > -1) { | |
414 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
415 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
416 | } | |
417 | // printf("\n particle (all) %d %d %d", i, pSelected[i], kf); | |
719b6b8a | 418 | // What to keep in Stack? |
419 | Bool_t flavorOK = kFALSE; | |
420 | Bool_t selectOK = kFALSE; | |
421 | if (fFeedDownOpt) { | |
422 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; | |
423 | } else { | |
424 | if (kfl > fFlavorSelect) { | |
425 | nc = -1; | |
426 | break; | |
427 | } | |
428 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
429 | } | |
430 | switch (fStackFillOpt) { | |
431 | case kFlavorSelection: | |
432 | selectOK = kTRUE; | |
433 | break; | |
434 | case kParentSelection: | |
435 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; | |
436 | break; | |
437 | } | |
438 | if (flavorOK && selectOK) { | |
5be1fe76 | 439 | // |
fff02fee | 440 | // Heavy flavor hadron or quark |
fe4da5cc | 441 | // |
fff02fee | 442 | // Kinematic seletion on final state heavy flavor mesons |
443 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
444 | { | |
719b6b8a | 445 | continue; |
fff02fee | 446 | } |
447 | pSelected[i] = 1; | |
719b6b8a | 448 | if (ParentSelected(kf)) ++nParents; // Update parent count |
fff02fee | 449 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
450 | } else { | |
451 | // Kinematic seletion on decay products | |
452 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
453 | && !KinematicSelection(iparticle, 1)) | |
454 | { | |
719b6b8a | 455 | continue; |
fff02fee | 456 | } |
fe4da5cc | 457 | // |
fff02fee | 458 | // Decay products |
459 | // Select if mother was selected and is not tracked | |
460 | ||
461 | if (pSelected[ipa] && | |
462 | !trackIt[ipa] && // mother will be tracked ? | |
463 | kfMo != 5 && // mother is b-quark, don't store fragments | |
464 | kfMo != 4 && // mother is c-quark, don't store fragments | |
465 | kf != 92) // don't store string | |
466 | { | |
fe4da5cc | 467 | // |
fff02fee | 468 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 469 | // |
5be1fe76 | 470 | // |
47fc6bd5 | 471 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
fff02fee | 472 | { |
473 | Int_t ipF = iparticle->GetFirstDaughter(); | |
474 | Int_t ipL = iparticle->GetLastDaughter(); | |
475 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
476 | } | |
477 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
478 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
479 | } | |
480 | } | |
481 | if (pSelected[i] == -1) pSelected[i] = 0; | |
482 | if (!pSelected[i]) continue; | |
719b6b8a | 483 | // Count quarks only if you did not include fragmentation |
484 | if (fFragmentation && kf <= 10) continue; | |
fff02fee | 485 | nc++; |
486 | // Decision on tracking | |
487 | trackIt[i] = 0; | |
488 | // | |
489 | // Track final state particle | |
490 | if (ks == 1) trackIt[i] = 1; | |
491 | // Track semi-stable particles | |
8cdfd303 | 492 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
fff02fee | 493 | // Track particles selected by process if undecayed. |
494 | if (fForceDecay == kNoDecay) { | |
495 | if (ParentSelected(kf)) trackIt[i] = 1; | |
496 | } else { | |
497 | if (ParentSelected(kf)) trackIt[i] = 0; | |
498 | } | |
719b6b8a | 499 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
fff02fee | 500 | // |
501 | // | |
502 | ||
503 | } // particle selection loop | |
719b6b8a | 504 | if (nc > 0) { |
b9817493 | 505 | for (i = 0; i<np; i++) { |
fff02fee | 506 | if (!pSelected[i]) continue; |
507 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
508 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
5ec84200 | 509 | Int_t ks = iparticle->GetStatusCode(); |
a0b2b296 | 510 | p[0] = iparticle->Px(); |
511 | p[1] = iparticle->Py(); | |
512 | p[2] = iparticle->Pz(); | |
513 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
514 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
515 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
516 | Float_t tof = kconv*iparticle->T(); | |
517 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fff02fee | 518 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a99cf51f | 519 | SetTrack(fTrackIt*trackIt[i] , |
5ec84200 | 520 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
fff02fee | 521 | pParent[i] = nt; |
a99cf51f | 522 | KeepTrack(nt); |
fff02fee | 523 | } // SetTrack loop |
524 | } | |
525 | } else { | |
526 | nc = GenerateMB(); | |
5be1fe76 | 527 | } // mb ? |
fff02fee | 528 | |
b9817493 | 529 | if (pParent) delete[] pParent; |
530 | if (pSelected) delete[] pSelected; | |
531 | if (trackIt) delete[] trackIt; | |
532 | ||
fe4da5cc | 533 | if (nc > 0) { |
719b6b8a | 534 | switch (fCountMode) { |
535 | case kCountAll: | |
536 | // printf(" Count all \n"); | |
537 | jev += nc; | |
538 | break; | |
539 | case kCountParents: | |
540 | // printf(" Count parents \n"); | |
541 | jev += nParents; | |
542 | break; | |
543 | case kCountTrackables: | |
544 | // printf(" Count trackable \n"); | |
545 | jev += nTkbles; | |
546 | break; | |
547 | } | |
5ddeb374 | 548 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 549 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 550 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
fd8fb861 | 551 | MakeHeader(); |
fe4da5cc | 552 | break; |
553 | } | |
554 | } | |
555 | } // event loop | |
a99cf51f | 556 | SetHighWaterMark(nt); |
fe4da5cc | 557 | // adjust weight due to kinematic selection |
558 | AdjustWeights(); | |
559 | // get cross-section | |
560 | fXsection=fPythia->GetPARI(1); | |
561 | } | |
562 | ||
fff02fee | 563 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 564 | { |
5ec84200 | 565 | // |
566 | // Min Bias selection and other global selections | |
567 | // | |
fff02fee | 568 | Int_t i, kf, nt, iparent; |
569 | Int_t nc = 0; | |
570 | Float_t p[3]; | |
571 | Float_t polar[3] = {0,0,0}; | |
572 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 573 | // converts from mm/c to s |
574 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 575 | |
fff02fee | 576 | Int_t np = fParticles->GetEntriesFast(); |
577 | Int_t* pParent = new Int_t[np]; | |
b9817493 | 578 | for (i=0; i< np; i++) pParent[i] = -1; |
b2bb450d | 579 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
988b118b | 580 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
581 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
582 | if (!CheckTrigger(jet1, jet2)) return 0; | |
583 | } | |
584 | ||
b9817493 | 585 | for (i = 0; i<np; i++) { |
fff02fee | 586 | Int_t trackIt = 0; |
587 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
588 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
589 | Int_t ks = iparticle->GetStatusCode(); | |
590 | Int_t km = iparticle->GetFirstMother(); | |
591 | // printf("\n Particle: %d %d %d", i, kf, ks); | |
592 | ||
593 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || | |
594 | (ks != 1) || | |
595 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
596 | nc++; | |
597 | if (ks == 1) trackIt = 1; | |
598 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fe4da5cc | 599 | |
fff02fee | 600 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
fe4da5cc | 601 | |
602 | // | |
fff02fee | 603 | // store track information |
a0b2b296 | 604 | p[0] = iparticle->Px(); |
605 | p[1] = iparticle->Py(); | |
606 | p[2] = iparticle->Pz(); | |
607 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
608 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
609 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
fff02fee | 610 | Float_t tof=kconv*iparticle->T(); |
a99cf51f | 611 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
5ec84200 | 612 | tof, kPPrimary, nt, 1., ks); |
a99cf51f | 613 | KeepTrack(nt); |
fff02fee | 614 | pParent[i] = nt; |
615 | } // select particle | |
616 | } // particle loop | |
617 | ||
618 | if (pParent) delete[] pParent; | |
fe4da5cc | 619 | |
fff02fee | 620 | printf("\n I've put %i particles on the stack \n",nc); |
fff02fee | 621 | return nc; |
622 | } | |
fe4da5cc | 623 | |
fe4da5cc | 624 | |
fff02fee | 625 | void AliGenPythia::FinishRun() |
626 | { | |
627 | // Print x-section summary | |
628 | fPythia->Pystat(1); | |
fe4da5cc | 629 | } |
fff02fee | 630 | |
fe4da5cc | 631 | void AliGenPythia::AdjustWeights() |
632 | { | |
5ddeb374 | 633 | // Adjust the weights after generation of all events |
634 | // | |
5ddeb374 | 635 | TParticle *part; |
fe4da5cc | 636 | Int_t ntrack=gAlice->GetNtrack(); |
637 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 638 | part= gAlice->Particle(i); |
5ddeb374 | 639 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 640 | } |
641 | } | |
811826d8 | 642 | |
643 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
644 | { | |
645 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
646 | fNucA1 = a1; | |
647 | fNucA2 = a2; | |
648 | } | |
fff02fee | 649 | |
650 | ||
6d4dd317 | 651 | void AliGenPythia::MakeHeader() const |
fff02fee | 652 | { |
653 | // Builds the event header, to be called after each event | |
654 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
c5d36e84 | 655 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
fd8fb861 | 656 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
c5d36e84 | 657 | header->SetPrimaryVertex(fEventVertex); |
658 | gAlice->SetGenEventHeader(header); | |
fff02fee | 659 | } |
811826d8 | 660 | |
988b118b | 661 | |
5ec84200 | 662 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) const |
988b118b | 663 | { |
664 | // Check the kinematic trigger condition | |
665 | // | |
b2bb450d | 666 | Double_t eta[2]; |
667 | eta[0] = jet1->Eta(); | |
668 | eta[1] = jet2->Eta(); | |
669 | Double_t phi[2]; | |
670 | phi[0] = jet1->Phi(); | |
671 | phi[1] = jet2->Phi(); | |
672 | Int_t pdg[2]; | |
673 | pdg[0] = jet1->GetPdgCode(); | |
674 | pdg[1] = jet2->GetPdgCode(); | |
988b118b | 675 | Bool_t triggered = kFALSE; |
b2bb450d | 676 | |
677 | if (fProcess == kPyJets) { | |
678 | //Check eta range first... | |
679 | if ((eta[0] < fEtaMaxJet && eta[0] > fEtaMinJet) || | |
680 | (eta[1] < fEtaMaxJet && eta[1] > fEtaMinJet)) | |
681 | { | |
682 | //Eta is okay, now check phi range | |
683 | if ((phi[0] < fPhiMaxJet && phi[0] > fPhiMinJet) || | |
684 | (phi[1] < fPhiMaxJet && phi[1] > fPhiMinJet)) | |
685 | { | |
686 | triggered = kTRUE; | |
687 | } | |
688 | } | |
689 | } else { | |
690 | Int_t ij = 0; | |
691 | Int_t ig = 1; | |
692 | if (pdg[0] == kGamma) { | |
693 | ij = 1; | |
694 | ig = 0; | |
695 | } | |
696 | //Check eta range first... | |
697 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
698 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
699 | { | |
700 | //Eta is okay, now check phi range | |
701 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
702 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
703 | { | |
704 | triggered = kTRUE; | |
705 | } | |
706 | } | |
988b118b | 707 | } |
b2bb450d | 708 | |
709 | ||
988b118b | 710 | return triggered; |
711 | } | |
811826d8 | 712 | |
f87cfe57 | 713 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
714 | { | |
715 | // Assignment operator | |
716 | return *this; | |
717 | } | |
fe4da5cc | 718 | |
719 | ||
811826d8 | 720 | |
a8a6107b | 721 | #ifdef never |
18edb254 | 722 | void AliGenPythia::Streamer(TBuffer &R__b) |
723 | { | |
724 | // Stream an object of class AliGenPythia. | |
725 | ||
726 | if (R__b.IsReading()) { | |
727 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
728 | AliGenerator::Streamer(R__b); | |
729 | R__b >> (Int_t&)fProcess; | |
730 | R__b >> (Int_t&)fStrucFunc; | |
731 | R__b >> (Int_t&)fForceDecay; | |
732 | R__b >> fEnergyCMS; | |
733 | R__b >> fKineBias; | |
734 | R__b >> fTrials; | |
735 | fParentSelect.Streamer(R__b); | |
736 | fChildSelect.Streamer(R__b); | |
737 | R__b >> fXsection; | |
738 | // (AliPythia::Instance())->Streamer(R__b); | |
739 | R__b >> fPtHardMin; | |
740 | R__b >> fPtHardMax; | |
741 | // if (fDecayer) fDecayer->Streamer(R__b); | |
742 | } else { | |
743 | R__b.WriteVersion(AliGenPythia::IsA()); | |
744 | AliGenerator::Streamer(R__b); | |
745 | R__b << (Int_t)fProcess; | |
746 | R__b << (Int_t)fStrucFunc; | |
747 | R__b << (Int_t)fForceDecay; | |
748 | R__b << fEnergyCMS; | |
749 | R__b << fKineBias; | |
750 | R__b << fTrials; | |
751 | fParentSelect.Streamer(R__b); | |
752 | fChildSelect.Streamer(R__b); | |
753 | R__b << fXsection; | |
754 | // R__b << fPythia; | |
755 | R__b << fPtHardMin; | |
756 | R__b << fPtHardMax; | |
757 | // fDecayer->Streamer(R__b); | |
758 | } | |
759 | } | |
a8a6107b | 760 | #endif |
18edb254 | 761 |