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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 | $Log$ | |
cc363573 | 18 | Revision 1.63 2002/10/14 14:55:35 hristov |
19 | Merging the VirtualMC branch to the main development branch (HEAD) | |
20 | ||
b9d0a01d | 21 | Revision 1.52.4.4 2002/10/10 16:40:08 hristov |
22 | Updating VirtualMC to v3-09-02 | |
23 | ||
24 | Revision 1.62 2002/09/24 10:00:01 morsch | |
25 | CheckTrigger() corrected. | |
26 | ||
6ae1960b | 27 | Revision 1.61 2002/07/30 09:52:38 morsch |
28 | Call SetGammaPhiRange() and SetGammaEtaRange() in the constructor. | |
29 | ||
a7f29b20 | 30 | Revision 1.60 2002/07/19 14:49:03 morsch |
31 | Typo corrected. | |
32 | ||
438003bb | 33 | Revision 1.59 2002/07/19 14:35:36 morsch |
34 | Count total number of trials. Print mean Q, x1, x2. | |
35 | ||
8a8f459f | 36 | Revision 1.58 2002/07/17 10:04:09 morsch |
37 | SetYHard method added. | |
38 | ||
35967770 | 39 | Revision 1.57 2002/05/22 13:22:53 morsch |
40 | Process kPyMbNonDiffr added. | |
41 | ||
5f42cc16 | 42 | Revision 1.56 2002/04/26 10:30:01 morsch |
43 | Option kPyBeautyPbMNR added. (N. Carrer). | |
44 | ||
c0acde67 | 45 | Revision 1.55 2002/04/17 10:23:56 morsch |
46 | Coding Rule violations corrected. | |
47 | ||
6d4dd317 | 48 | Revision 1.54 2002/03/28 11:49:10 morsch |
49 | Pass status code in SetTrack. | |
50 | ||
5ec84200 | 51 | Revision 1.53 2002/03/25 14:51:13 morsch |
52 | New stack-fill and count options introduced (N. Carrer). | |
53 | ||
0d7c70a0 | 54 | Revision 1.51 2002/03/06 08:46:57 morsch |
55 | - Loop until np-1 | |
56 | - delete dyn. alloc. arrays (N. Carrer) | |
57 | ||
b9817493 | 58 | Revision 1.50 2002/03/03 13:48:50 morsch |
59 | Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR | |
60 | NLO calculations (Nicola Carrer). | |
61 | ||
fbd1348b | 62 | Revision 1.49 2002/02/08 16:50:50 morsch |
63 | Add name and title in constructor. | |
64 | ||
8b31bfac | 65 | Revision 1.48 2001/12/20 11:44:28 morsch |
66 | Add kinematic bias for direct gamma production. | |
67 | ||
b2bb450d | 68 | Revision 1.47 2001/12/19 14:45:00 morsch |
69 | Store number of trials in header. | |
70 | ||
fd8fb861 | 71 | Revision 1.46 2001/12/19 10:36:19 morsch |
72 | Add possibility if jet kinematic biasing. | |
73 | ||
988b118b | 74 | Revision 1.45 2001/11/28 08:06:52 morsch |
75 | Use fMaxLifeTime parameter. | |
76 | ||
8cdfd303 | 77 | Revision 1.44 2001/11/27 13:13:07 morsch |
78 | Maximum lifetime for long-lived particles to be put on the stack is parameter. | |
79 | It can be set via SetMaximumLifetime(..). | |
80 | ||
47fc6bd5 | 81 | Revision 1.43 2001/10/21 18:35:56 hristov |
82 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
83 | ||
2685bf00 | 84 | Revision 1.42 2001/10/15 08:21:55 morsch |
85 | Vertex truncation settings moved to AliGenMC. | |
86 | ||
4c07486d | 87 | Revision 1.41 2001/10/08 08:45:42 morsch |
88 | Possibility of vertex cut added. | |
89 | ||
a0b2b296 | 90 | Revision 1.40 2001/09/25 11:30:23 morsch |
91 | Pass event vertex to header. | |
92 | ||
c5d36e84 | 93 | Revision 1.39 2001/07/27 17:09:36 morsch |
94 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
95 | to delegate either to local stack or to stack owned by AliRun. | |
96 | (Piotr Skowronski, A.M.) | |
97 | ||
a99cf51f | 98 | Revision 1.38 2001/07/13 10:58:54 morsch |
99 | - Some coded moved to AliGenMC | |
100 | - Improved handling of secondary vertices. | |
101 | ||
fff02fee | 102 | Revision 1.37 2001/06/28 11:17:28 morsch |
103 | SetEventListRange setter added. Events in specified range are listed for | |
104 | debugging. (Yuri Kharlov) | |
105 | ||
11dfaf8d | 106 | Revision 1.36 2001/03/30 07:05:49 morsch |
107 | Final print-out in finish run. | |
108 | Write parton system for jet-production (preliminary solution). | |
109 | ||
9be6226f | 110 | Revision 1.35 2001/03/09 13:03:40 morsch |
111 | Process_t and Struc_Func_t moved to AliPythia.h | |
112 | ||
f1a48a38 | 113 | Revision 1.34 2001/02/14 15:50:40 hristov |
114 | The last particle in event marked using SetHighWaterMark | |
115 | ||
28adac24 | 116 | Revision 1.33 2001/01/30 09:23:12 hristov |
117 | Streamers removed (R.Brun) | |
118 | ||
a8a6107b | 119 | Revision 1.32 2001/01/26 19:55:51 hristov |
120 | Major upgrade of AliRoot code | |
121 | ||
2ab0c725 | 122 | Revision 1.31 2001/01/17 10:54:31 hristov |
123 | Better protection against FPE | |
124 | ||
0f9e52a3 | 125 | Revision 1.30 2000/12/18 08:55:35 morsch |
126 | Make AliPythia dependent generartors work with new scheme of random number generation | |
127 | ||
3356c022 | 128 | Revision 1.29 2000/12/04 11:22:03 morsch |
129 | Init of sRandom as in 1.15 | |
130 | ||
097ec7c1 | 131 | Revision 1.28 2000/12/02 11:41:39 morsch |
132 | Use SetRandom() to initialize random number generator in constructor. | |
133 | ||
1ed25e11 | 134 | Revision 1.27 2000/11/30 20:29:02 morsch |
135 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
136 | ||
ad1df918 | 137 | Revision 1.26 2000/11/30 07:12:50 alibrary |
138 | Introducing new Rndm and QA classes | |
139 | ||
65fb704d | 140 | Revision 1.25 2000/10/18 19:11:27 hristov |
141 | Division by zero fixed | |
142 | ||
919c2096 | 143 | Revision 1.24 2000/09/18 10:41:35 morsch |
144 | Add possibility to use nuclear structure functions from PDF library V8. | |
145 | ||
811826d8 | 146 | Revision 1.23 2000/09/14 14:05:40 morsch |
147 | dito | |
148 | ||
819f84ad | 149 | Revision 1.22 2000/09/14 14:02:22 morsch |
150 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
151 | - Correct handling of fForceDecay == all. | |
152 | ||
4451ef92 | 153 | Revision 1.21 2000/09/12 14:14:55 morsch |
154 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
155 | ||
00d6ce7d | 156 | Revision 1.20 2000/09/06 14:29:33 morsch |
157 | Use AliPythia for event generation an AliDecayPythia for decays. | |
158 | Correct handling of "nodecay" option | |
159 | ||
18edb254 | 160 | Revision 1.19 2000/07/11 18:24:56 fca |
161 | Coding convention corrections + few minor bug fixes | |
162 | ||
aee8290b | 163 | Revision 1.18 2000/06/30 12:40:34 morsch |
164 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
165 | Geant units (cm). | |
166 | ||
1512e357 | 167 | Revision 1.17 2000/06/09 20:34:07 morsch |
168 | All coding rule violations except RS3 corrected | |
169 | ||
f87cfe57 | 170 | Revision 1.16 2000/05/15 15:04:20 morsch |
171 | The full event is written for fNtrack = -1 | |
172 | Coding rule violations corrected. | |
173 | ||
5ddeb374 | 174 | Revision 1.15 2000/04/26 10:14:24 morsch |
175 | Particles array has one entry more than pythia particle list. Upper bound of | |
176 | particle loop changed to np-1 (R. Guernane, AM) | |
177 | ||
2a0e6f5b | 178 | Revision 1.14 2000/04/05 08:36:13 morsch |
179 | Check status code of particles in Pythia event | |
180 | to avoid double counting as partonic state and final state particle. | |
181 | ||
23211d3e | 182 | Revision 1.13 1999/11/09 07:38:48 fca |
183 | Changes for compatibility with version 2.23 of ROOT | |
184 | ||
084c1b4a | 185 | Revision 1.12 1999/11/03 17:43:20 fca |
186 | New version from G.Martinez & A.Morsch | |
187 | ||
886b6f73 | 188 | Revision 1.11 1999/09/29 09:24:14 fca |
189 | Introduction of the Copyright and cvs Log | |
4c039060 | 190 | */ |
191 | ||
6d4dd317 | 192 | // |
193 | // Generator using the TPythia interface (via AliPythia) | |
194 | // to generate pp collisions. | |
195 | // Using SetNuclei() also nuclear modifications to the structure functions | |
196 | // can be taken into account. This makes, of course, only sense for the | |
197 | // generation of the products of hard processes (heavy flavor, jets ...) | |
198 | // | |
199 | // andreas.morsch@cern.ch | |
200 | // | |
201 | ||
202 | ||
fe4da5cc | 203 | #include "AliGenPythia.h" |
fff02fee | 204 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 205 | #include "AliDecayerPythia.h" |
fe4da5cc | 206 | #include "AliRun.h" |
207 | #include "AliPythia.h" | |
18edb254 | 208 | #include "AliPDG.h" |
cc363573 | 209 | #include "AliConst.h" |
1578254f | 210 | #include <TParticle.h> |
18edb254 | 211 | #include <TSystem.h> |
cc363573 | 212 | #include <TTree.h> |
213 | #include <TDatabasePDG.h> | |
f87cfe57 | 214 | |
fe4da5cc | 215 | ClassImp(AliGenPythia) |
216 | ||
217 | AliGenPythia::AliGenPythia() | |
fff02fee | 218 | :AliGenMC() |
fe4da5cc | 219 | { |
18edb254 | 220 | // Default Constructor |
2685bf00 | 221 | fParticles = 0; |
222 | fPythia = 0; | |
988b118b | 223 | fDecayer = new AliDecayerPythia(); |
11dfaf8d | 224 | SetEventListRange(); |
988b118b | 225 | SetJetPhiRange(); |
226 | SetJetEtaRange(); | |
cc363573 | 227 | SetJetEtRange(); |
a7f29b20 | 228 | SetGammaPhiRange(); |
229 | SetGammaEtaRange(); | |
fe4da5cc | 230 | } |
231 | ||
232 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 233 | :AliGenMC(npart) |
fe4da5cc | 234 | { |
235 | // default charm production at 5. 5 TeV | |
236 | // semimuonic decay | |
237 | // structure function GRVHO | |
238 | // | |
8b31bfac | 239 | fName = "Pythia"; |
240 | fTitle= "Particle Generator using PYTHIA"; | |
fe4da5cc | 241 | fXsection = 0.; |
811826d8 | 242 | fNucA1=0; |
243 | fNucA2=0; | |
fe4da5cc | 244 | SetProcess(); |
245 | SetStrucFunc(); | |
886b6f73 | 246 | SetForceDecay(); |
fe4da5cc | 247 | SetPtHard(); |
8a8f459f | 248 | SetYHard(); |
fe4da5cc | 249 | SetEnergyCMS(); |
18edb254 | 250 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 251 | // Set random number generator |
097ec7c1 | 252 | sRandom=fRandom; |
fff02fee | 253 | fFlavorSelect = 0; |
254 | // Produced particles | |
255 | fParticles = new TClonesArray("TParticle",1000); | |
c5d36e84 | 256 | fEventVertex.Set(3); |
988b118b | 257 | SetEventListRange(); |
258 | SetJetPhiRange(); | |
259 | SetJetEtaRange(); | |
cc363573 | 260 | SetJetEtRange(); |
a7f29b20 | 261 | SetGammaPhiRange(); |
262 | SetGammaEtaRange(); | |
719b6b8a | 263 | // Options determining what to keep in the stack (Heavy flavour generation) |
264 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor | |
265 | fFeedDownOpt = kTRUE; // allow feed down from higher family | |
266 | // Fragmentation on/off | |
267 | fFragmentation = kTRUE; | |
268 | // Default counting mode | |
269 | fCountMode = kCountAll; | |
fe4da5cc | 270 | } |
271 | ||
f87cfe57 | 272 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
273 | { | |
274 | // copy constructor | |
6d4dd317 | 275 | Pythia.Copy(*this); |
f87cfe57 | 276 | } |
277 | ||
fe4da5cc | 278 | AliGenPythia::~AliGenPythia() |
279 | { | |
5ddeb374 | 280 | // Destructor |
fe4da5cc | 281 | } |
282 | ||
11dfaf8d | 283 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
284 | { | |
285 | // Set a range of event numbers, for which a table | |
286 | // of generated particle will be printed | |
287 | fDebugEventFirst = eventFirst; | |
288 | fDebugEventLast = eventLast; | |
289 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
290 | } | |
291 | ||
fe4da5cc | 292 | void AliGenPythia::Init() |
293 | { | |
5ddeb374 | 294 | // Initialisation |
cc363573 | 295 | |
296 | SetMC(AliPythia::Instance()); | |
fe4da5cc | 297 | fPythia=(AliPythia*) fgMCEvGen; |
298 | // | |
299 | fParentWeight=1./Float_t(fNpart); | |
300 | // | |
301 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 302 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 303 | fDecayer->Init(); |
00d6ce7d | 304 | |
18edb254 | 305 | |
fe4da5cc | 306 | fPythia->SetCKIN(3,fPtHardMin); |
35967770 | 307 | fPythia->SetCKIN(4,fPtHardMax); |
308 | fPythia->SetCKIN(7,fYHardMin); | |
309 | fPythia->SetCKIN(8,fYHardMax); | |
310 | ||
811826d8 | 311 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
719b6b8a | 312 | // Fragmentation? |
313 | if (fFragmentation) { | |
314 | fPythia->SetMSTP(111,1); | |
315 | } else { | |
316 | fPythia->SetMSTP(111,0); | |
317 | } | |
318 | ||
fe4da5cc | 319 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 320 | |
cc363573 | 321 | // initial state radiation |
322 | fPythia->SetMSTP(61,fGinit); | |
323 | // final state radiation | |
324 | fPythia->SetMSTP(71,fGfinal); | |
325 | // | |
326 | fPythia->SetMSTP(91,1); | |
327 | fPythia->SetMSTU(16,1); | |
328 | fPythia->SetMSTJ(1,1); | |
329 | // | |
fe4da5cc | 330 | // Parent and Children Selection |
331 | switch (fProcess) | |
332 | { | |
f1a48a38 | 333 | case kPyCharm: |
f1a48a38 | 334 | case kPyCharmUnforced: |
fbd1348b | 335 | case kPyCharmPbMNR: |
b2bb450d | 336 | fParentSelect[0] = 411; |
337 | fParentSelect[1] = 421; | |
338 | fParentSelect[2] = 431; | |
339 | fParentSelect[3] = 4122; | |
8b31bfac | 340 | fFlavorSelect = 4; |
fe4da5cc | 341 | break; |
719b6b8a | 342 | case kPyD0PbMNR: |
343 | fParentSelect[0] = 421; | |
5f42cc16 | 344 | fFlavorSelect = 4; |
719b6b8a | 345 | break; |
f1a48a38 | 346 | case kPyBeauty: |
c0acde67 | 347 | case kPyBeautyPbMNR: |
fff02fee | 348 | fParentSelect[0]= 511; |
349 | fParentSelect[1]= 521; | |
350 | fParentSelect[2]= 531; | |
351 | fParentSelect[3]= 5122; | |
352 | fParentSelect[4]= 5132; | |
353 | fParentSelect[5]= 5232; | |
354 | fParentSelect[6]= 5332; | |
355 | fFlavorSelect = 5; | |
fe4da5cc | 356 | break; |
f1a48a38 | 357 | case kPyBeautyUnforced: |
fff02fee | 358 | fParentSelect[0] = 511; |
359 | fParentSelect[1] = 521; | |
360 | fParentSelect[2] = 531; | |
361 | fParentSelect[3] = 5122; | |
362 | fParentSelect[4] = 5132; | |
363 | fParentSelect[5] = 5232; | |
364 | fParentSelect[6] = 5332; | |
365 | fFlavorSelect = 5; | |
fe4da5cc | 366 | break; |
f1a48a38 | 367 | case kPyJpsiChi: |
368 | case kPyJpsi: | |
fff02fee | 369 | fParentSelect[0] = 443; |
fe4da5cc | 370 | break; |
f1a48a38 | 371 | case kPyMb: |
5f42cc16 | 372 | case kPyMbNonDiffr: |
f1a48a38 | 373 | case kPyJets: |
374 | case kPyDirectGamma: | |
5be1fe76 | 375 | break; |
fe4da5cc | 376 | } |
8a8f459f | 377 | // |
378 | // This counts the total number of calls to Pyevnt() per run. | |
379 | fTrialsRun = 0; | |
380 | fQ = 0.; | |
381 | fX1 = 0.; | |
382 | fX2 = 0.; | |
438003bb | 383 | fNev = 0 ; |
8a8f459f | 384 | // |
fff02fee | 385 | AliGenMC::Init(); |
fe4da5cc | 386 | } |
387 | ||
388 | void AliGenPythia::Generate() | |
389 | { | |
5ddeb374 | 390 | // Generate one event |
00d6ce7d | 391 | fDecayer->ForceDecay(); |
a0b2b296 | 392 | |
9be6226f | 393 | Float_t polar[3] = {0,0,0}; |
394 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 395 | Float_t p[3]; |
5be1fe76 | 396 | // converts from mm/c to s |
397 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 398 | // |
fe4da5cc | 399 | Int_t nt=0; |
400 | Int_t jev=0; | |
7921755b | 401 | Int_t j, kf; |
fe4da5cc | 402 | fTrials=0; |
fff02fee | 403 | |
fd8fb861 | 404 | // Set collision vertex position |
aee8290b | 405 | if(fVertexSmear==kPerEvent) { |
1512e357 | 406 | fPythia->SetMSTP(151,1); |
fe4da5cc | 407 | for (j=0;j<3;j++) { |
fff02fee | 408 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 409 | } |
aee8290b | 410 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 411 | fPythia->SetMSTP(151,0); |
fe4da5cc | 412 | } |
fff02fee | 413 | // event loop |
fe4da5cc | 414 | while(1) |
415 | { | |
084c1b4a | 416 | fPythia->Pyevnt(); |
11dfaf8d | 417 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
418 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 419 | fTrials++; |
47fc6bd5 | 420 | |
fff02fee | 421 | fPythia->ImportParticles(fParticles,"All"); |
422 | ||
423 | // | |
424 | // | |
425 | // | |
426 | Int_t i; | |
427 | ||
428 | Int_t np = fParticles->GetEntriesFast(); | |
a0b2b296 | 429 | if (np == 0 ) continue; |
430 | // Get event vertex and discard the event if the Z coord. is too big | |
4c07486d | 431 | TParticle *iparticle = (TParticle *) fParticles->At(0); |
432 | Float_t distz = iparticle->Vz()/10.; | |
433 | if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; | |
a0b2b296 | 434 | // |
4c07486d | 435 | fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); |
436 | fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); | |
437 | fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); | |
a0b2b296 | 438 | // |
fff02fee | 439 | Int_t* pParent = new Int_t[np]; |
440 | Int_t* pSelected = new Int_t[np]; | |
441 | Int_t* trackIt = new Int_t[np]; | |
b9817493 | 442 | for (i=0; i< np; i++) { |
fff02fee | 443 | pParent[i] = -1; |
444 | pSelected[i] = 0; | |
719b6b8a | 445 | trackIt[i] = 0; |
fff02fee | 446 | } |
8a8f459f | 447 | |
719b6b8a | 448 | Int_t nc = 0; // Total n. of selected particles |
449 | Int_t nParents = 0; // Selected parents | |
450 | Int_t nTkbles = 0; // Trackable particles | |
a7f29b20 | 451 | if (fProcess != kPyMb && fProcess != kPyJets && |
452 | fProcess != kPyDirectGamma && | |
5f42cc16 | 453 | fProcess != kPyMbNonDiffr) { |
fd8fb861 | 454 | |
b9817493 | 455 | for (i = 0; i<np; i++) { |
c5d36e84 | 456 | iparticle = (TParticle *) fParticles->At(i); |
23211d3e | 457 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 458 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 459 | // No initial state partons |
2a0e6f5b | 460 | if (ks==21) continue; |
fe4da5cc | 461 | // |
fff02fee | 462 | // Heavy Flavor Selection |
5be1fe76 | 463 | // |
fff02fee | 464 | // quark ? |
465 | kf = TMath::Abs(kf); | |
466 | Int_t kfl = kf; | |
467 | // meson ? | |
468 | if (kfl > 10) kfl/=100; | |
469 | // baryon | |
470 | if (kfl > 10) kfl/=10; | |
471 | if (kfl > 10) kfl/=10; | |
472 | ||
473 | Int_t ipa = iparticle->GetFirstMother()-1; | |
474 | Int_t kfMo = 0; | |
475 | ||
476 | if (ipa > -1) { | |
477 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
478 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
479 | } | |
719b6b8a | 480 | // What to keep in Stack? |
481 | Bool_t flavorOK = kFALSE; | |
482 | Bool_t selectOK = kFALSE; | |
483 | if (fFeedDownOpt) { | |
484 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; | |
485 | } else { | |
486 | if (kfl > fFlavorSelect) { | |
487 | nc = -1; | |
488 | break; | |
489 | } | |
490 | if (kfl == fFlavorSelect) flavorOK = kTRUE; | |
491 | } | |
492 | switch (fStackFillOpt) { | |
493 | case kFlavorSelection: | |
494 | selectOK = kTRUE; | |
495 | break; | |
496 | case kParentSelection: | |
497 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; | |
498 | break; | |
499 | } | |
500 | if (flavorOK && selectOK) { | |
5be1fe76 | 501 | // |
fff02fee | 502 | // Heavy flavor hadron or quark |
fe4da5cc | 503 | // |
fff02fee | 504 | // Kinematic seletion on final state heavy flavor mesons |
505 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
506 | { | |
719b6b8a | 507 | continue; |
fff02fee | 508 | } |
509 | pSelected[i] = 1; | |
719b6b8a | 510 | if (ParentSelected(kf)) ++nParents; // Update parent count |
fff02fee | 511 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
512 | } else { | |
513 | // Kinematic seletion on decay products | |
514 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
515 | && !KinematicSelection(iparticle, 1)) | |
516 | { | |
719b6b8a | 517 | continue; |
fff02fee | 518 | } |
fe4da5cc | 519 | // |
fff02fee | 520 | // Decay products |
521 | // Select if mother was selected and is not tracked | |
522 | ||
523 | if (pSelected[ipa] && | |
524 | !trackIt[ipa] && // mother will be tracked ? | |
525 | kfMo != 5 && // mother is b-quark, don't store fragments | |
526 | kfMo != 4 && // mother is c-quark, don't store fragments | |
527 | kf != 92) // don't store string | |
528 | { | |
fe4da5cc | 529 | // |
fff02fee | 530 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 531 | // |
5be1fe76 | 532 | // |
47fc6bd5 | 533 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
fff02fee | 534 | { |
535 | Int_t ipF = iparticle->GetFirstDaughter(); | |
536 | Int_t ipL = iparticle->GetLastDaughter(); | |
537 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
538 | } | |
539 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
540 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
541 | } | |
542 | } | |
543 | if (pSelected[i] == -1) pSelected[i] = 0; | |
544 | if (!pSelected[i]) continue; | |
719b6b8a | 545 | // Count quarks only if you did not include fragmentation |
546 | if (fFragmentation && kf <= 10) continue; | |
fff02fee | 547 | nc++; |
548 | // Decision on tracking | |
549 | trackIt[i] = 0; | |
550 | // | |
551 | // Track final state particle | |
552 | if (ks == 1) trackIt[i] = 1; | |
553 | // Track semi-stable particles | |
8cdfd303 | 554 | if ((ks ==1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
fff02fee | 555 | // Track particles selected by process if undecayed. |
556 | if (fForceDecay == kNoDecay) { | |
557 | if (ParentSelected(kf)) trackIt[i] = 1; | |
558 | } else { | |
559 | if (ParentSelected(kf)) trackIt[i] = 0; | |
560 | } | |
719b6b8a | 561 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
fff02fee | 562 | // |
563 | // | |
564 | ||
565 | } // particle selection loop | |
719b6b8a | 566 | if (nc > 0) { |
b9817493 | 567 | for (i = 0; i<np; i++) { |
fff02fee | 568 | if (!pSelected[i]) continue; |
569 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
570 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
5ec84200 | 571 | Int_t ks = iparticle->GetStatusCode(); |
a0b2b296 | 572 | p[0] = iparticle->Px(); |
573 | p[1] = iparticle->Py(); | |
574 | p[2] = iparticle->Pz(); | |
575 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
576 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
577 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
578 | Float_t tof = kconv*iparticle->T(); | |
579 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fff02fee | 580 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a99cf51f | 581 | SetTrack(fTrackIt*trackIt[i] , |
5ec84200 | 582 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks); |
fff02fee | 583 | pParent[i] = nt; |
a99cf51f | 584 | KeepTrack(nt); |
fff02fee | 585 | } // SetTrack loop |
586 | } | |
587 | } else { | |
588 | nc = GenerateMB(); | |
5be1fe76 | 589 | } // mb ? |
fff02fee | 590 | |
b9817493 | 591 | if (pParent) delete[] pParent; |
592 | if (pSelected) delete[] pSelected; | |
593 | if (trackIt) delete[] trackIt; | |
594 | ||
fe4da5cc | 595 | if (nc > 0) { |
719b6b8a | 596 | switch (fCountMode) { |
597 | case kCountAll: | |
598 | // printf(" Count all \n"); | |
599 | jev += nc; | |
600 | break; | |
601 | case kCountParents: | |
602 | // printf(" Count parents \n"); | |
603 | jev += nParents; | |
604 | break; | |
605 | case kCountTrackables: | |
606 | // printf(" Count trackable \n"); | |
607 | jev += nTkbles; | |
608 | break; | |
609 | } | |
5ddeb374 | 610 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 611 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 612 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
8a8f459f | 613 | |
614 | fQ += fPythia->GetVINT(51); | |
615 | fX1 += fPythia->GetVINT(41); | |
616 | fX2 += fPythia->GetVINT(42); | |
617 | fTrialsRun += fTrials; | |
618 | fNev++; | |
fd8fb861 | 619 | MakeHeader(); |
fe4da5cc | 620 | break; |
621 | } | |
622 | } | |
623 | } // event loop | |
a99cf51f | 624 | SetHighWaterMark(nt); |
fe4da5cc | 625 | // adjust weight due to kinematic selection |
626 | AdjustWeights(); | |
627 | // get cross-section | |
628 | fXsection=fPythia->GetPARI(1); | |
629 | } | |
630 | ||
fff02fee | 631 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 632 | { |
5ec84200 | 633 | // |
634 | // Min Bias selection and other global selections | |
635 | // | |
fff02fee | 636 | Int_t i, kf, nt, iparent; |
637 | Int_t nc = 0; | |
638 | Float_t p[3]; | |
639 | Float_t polar[3] = {0,0,0}; | |
640 | Float_t origin[3] = {0,0,0}; | |
fff02fee | 641 | // converts from mm/c to s |
642 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 643 | |
fff02fee | 644 | Int_t np = fParticles->GetEntriesFast(); |
645 | Int_t* pParent = new Int_t[np]; | |
b9817493 | 646 | for (i=0; i< np; i++) pParent[i] = -1; |
b2bb450d | 647 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
988b118b | 648 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
649 | TParticle* jet2 = (TParticle *) fParticles->At(7); | |
650 | if (!CheckTrigger(jet1, jet2)) return 0; | |
651 | } | |
652 | ||
b9817493 | 653 | for (i = 0; i<np; i++) { |
fff02fee | 654 | Int_t trackIt = 0; |
655 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
656 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
657 | Int_t ks = iparticle->GetStatusCode(); | |
658 | Int_t km = iparticle->GetFirstMother(); | |
fff02fee | 659 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
660 | (ks != 1) || | |
661 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
662 | nc++; | |
663 | if (ks == 1) trackIt = 1; | |
664 | Int_t ipa = iparticle->GetFirstMother()-1; | |
35967770 | 665 | |
fff02fee | 666 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
35967770 | 667 | |
fe4da5cc | 668 | // |
fff02fee | 669 | // store track information |
a0b2b296 | 670 | p[0] = iparticle->Px(); |
671 | p[1] = iparticle->Py(); | |
672 | p[2] = iparticle->Pz(); | |
673 | origin[0] = fOrigin[0]+iparticle->Vx()/10.; | |
674 | origin[1] = fOrigin[1]+iparticle->Vy()/10.; | |
675 | origin[2] = fOrigin[2]+iparticle->Vz()/10.; | |
fff02fee | 676 | Float_t tof=kconv*iparticle->T(); |
a99cf51f | 677 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
35967770 | 678 | tof, kPPrimary, nt, 1., ks); |
a99cf51f | 679 | KeepTrack(nt); |
fff02fee | 680 | pParent[i] = nt; |
681 | } // select particle | |
682 | } // particle loop | |
683 | ||
684 | if (pParent) delete[] pParent; | |
fe4da5cc | 685 | |
fff02fee | 686 | printf("\n I've put %i particles on the stack \n",nc); |
fff02fee | 687 | return nc; |
688 | } | |
fe4da5cc | 689 | |
fe4da5cc | 690 | |
fff02fee | 691 | void AliGenPythia::FinishRun() |
692 | { | |
693 | // Print x-section summary | |
694 | fPythia->Pystat(1); | |
8a8f459f | 695 | fQ /= fNev; |
696 | fX1 /= fNev; | |
697 | fX2 /= fNev; | |
698 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); | |
699 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); | |
700 | ||
701 | ||
fe4da5cc | 702 | } |
fff02fee | 703 | |
fe4da5cc | 704 | void AliGenPythia::AdjustWeights() |
705 | { | |
5ddeb374 | 706 | // Adjust the weights after generation of all events |
707 | // | |
5ddeb374 | 708 | TParticle *part; |
fe4da5cc | 709 | Int_t ntrack=gAlice->GetNtrack(); |
710 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 711 | part= gAlice->Particle(i); |
5ddeb374 | 712 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 713 | } |
714 | } | |
811826d8 | 715 | |
716 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
717 | { | |
718 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
719 | fNucA1 = a1; | |
720 | fNucA2 = a2; | |
721 | } | |
fff02fee | 722 | |
723 | ||
cc363573 | 724 | void AliGenPythia::MakeHeader() |
fff02fee | 725 | { |
726 | // Builds the event header, to be called after each event | |
727 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
cc363573 | 728 | // |
729 | // Event type | |
c5d36e84 | 730 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); |
cc363573 | 731 | // |
732 | // Number of trials | |
fd8fb861 | 733 | ((AliGenPythiaEventHeader*) header)->SetTrials(fTrials); |
cc363573 | 734 | // |
735 | // Event Vertex | |
c5d36e84 | 736 | header->SetPrimaryVertex(fEventVertex); |
cc363573 | 737 | // |
738 | // Jets that have triggered | |
739 | if (fProcess == kPyJets) | |
740 | { | |
741 | Int_t ntrig, njet; | |
742 | Float_t jets[4][10]; | |
743 | GetJets(5.0, 1, njet, ntrig, jets); | |
744 | for (Int_t i = 0; i < ntrig; i++) { | |
745 | ((AliGenPythiaEventHeader*) header)->AddJet(jets[0][i], jets[1][i], jets[2][i], | |
746 | jets[3][i]); | |
747 | } | |
748 | } | |
c5d36e84 | 749 | gAlice->SetGenEventHeader(header); |
fff02fee | 750 | } |
811826d8 | 751 | |
988b118b | 752 | |
cc363573 | 753 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
988b118b | 754 | { |
755 | // Check the kinematic trigger condition | |
756 | // | |
b2bb450d | 757 | Double_t eta[2]; |
758 | eta[0] = jet1->Eta(); | |
759 | eta[1] = jet2->Eta(); | |
760 | Double_t phi[2]; | |
761 | phi[0] = jet1->Phi(); | |
762 | phi[1] = jet2->Phi(); | |
763 | Int_t pdg[2]; | |
764 | pdg[0] = jet1->GetPdgCode(); | |
765 | pdg[1] = jet2->GetPdgCode(); | |
988b118b | 766 | Bool_t triggered = kFALSE; |
b2bb450d | 767 | |
768 | if (fProcess == kPyJets) { | |
cc363573 | 769 | Int_t njets = 0; |
770 | Int_t ntrig = 0; | |
771 | Float_t jets[4][10]; | |
772 | // | |
773 | // Use Pythia clustering on parton level to determine jet axis | |
774 | // | |
775 | GetJets(5.0, 1, njets, ntrig, jets); | |
776 | if (ntrig) triggered = kTRUE; | |
777 | // | |
b2bb450d | 778 | } else { |
779 | Int_t ij = 0; | |
780 | Int_t ig = 1; | |
781 | if (pdg[0] == kGamma) { | |
782 | ij = 1; | |
783 | ig = 0; | |
784 | } | |
785 | //Check eta range first... | |
786 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && | |
787 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) | |
788 | { | |
789 | //Eta is okay, now check phi range | |
790 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && | |
791 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) | |
792 | { | |
793 | triggered = kTRUE; | |
794 | } | |
795 | } | |
988b118b | 796 | } |
797 | return triggered; | |
798 | } | |
811826d8 | 799 | |
f87cfe57 | 800 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
801 | { | |
802 | // Assignment operator | |
803 | return *this; | |
804 | } | |
fe4da5cc | 805 | |
cc363573 | 806 | void AliGenPythia::LoadEvent() |
807 | { | |
808 | // | |
809 | // Load event into Pythia Common Block | |
810 | // | |
811 | ||
812 | ||
813 | Int_t npart = (Int_t) (gAlice->TreeK())->GetEntries(); | |
814 | (fPythia->GetPyjets())->N = npart; | |
815 | ||
816 | for (Int_t part = 0; part < npart; part++) { | |
817 | TParticle *MPart = gAlice->Particle(part); | |
818 | Int_t kf = MPart->GetPdgCode(); | |
819 | Int_t ks = MPart->GetStatusCode(); | |
820 | Float_t px = MPart->Px(); | |
821 | Float_t py = MPart->Py(); | |
822 | Float_t pz = MPart->Pz(); | |
823 | Float_t e = MPart->Energy(); | |
824 | Float_t p = TMath::Sqrt(px * px + py * py + pz * pz); | |
825 | Float_t m = TMath::Sqrt(e * e - p * p); | |
826 | ||
827 | ||
828 | (fPythia->GetPyjets())->P[0][part] = px; | |
829 | (fPythia->GetPyjets())->P[1][part] = py; | |
830 | (fPythia->GetPyjets())->P[2][part] = pz; | |
831 | (fPythia->GetPyjets())->P[3][part] = e; | |
832 | (fPythia->GetPyjets())->P[4][part] = m; | |
833 | ||
834 | (fPythia->GetPyjets())->K[1][part] = kf; | |
835 | (fPythia->GetPyjets())->K[0][part] = ks; | |
836 | } | |
837 | } | |
838 | ||
839 | ||
840 | void AliGenPythia::GetJets(Float_t dist, Int_t part, Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) | |
841 | { | |
842 | // | |
843 | // Calls the Pythia clustering algorithm to find jets in the current event | |
844 | // | |
845 | Int_t n = fPythia->GetN(); | |
846 | nJets = 0; | |
847 | nJetsTrig = 0; | |
848 | // | |
849 | // Configure cluster algorithm | |
850 | // | |
851 | fPythia->SetPARU(43, dist); | |
852 | fPythia->SetMSTU(41, part); | |
853 | // | |
854 | // Call cluster algorithm | |
855 | // | |
856 | fPythia->Pyclus(nJets); | |
857 | // | |
858 | // Loading jets from common block | |
859 | // | |
860 | Int_t i; | |
861 | for (i = 0; i < nJets; i++) { | |
862 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; | |
863 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; | |
864 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; | |
865 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; | |
866 | Float_t pt = TMath::Sqrt(px * px + py * py); | |
867 | Float_t phi = TMath::ATan2(py,px); | |
868 | Float_t theta = TMath::ATan2(pt,pz); | |
869 | Float_t et = e * TMath::Sin(theta); | |
870 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); | |
871 | ||
872 | if ( | |
873 | eta > fEtaMinJet && eta < fEtaMaxJet && | |
874 | phi > fPhiMinJet && eta < fPhiMaxJet && | |
875 | et > fEtMinJet && et < fEtMaxJet | |
876 | ) | |
877 | { | |
878 | // printf("\n*Trigger-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); | |
879 | jets[0][nJetsTrig] = px; | |
880 | jets[1][nJetsTrig] = py; | |
881 | jets[2][nJetsTrig] = pz; | |
882 | jets[3][nJetsTrig] = e; | |
883 | nJetsTrig++; | |
884 | ||
885 | } else { | |
886 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); | |
887 | } | |
888 | } | |
889 | } | |
fe4da5cc | 890 | |
811826d8 | 891 | |
a8a6107b | 892 | #ifdef never |
18edb254 | 893 | void AliGenPythia::Streamer(TBuffer &R__b) |
894 | { | |
895 | // Stream an object of class AliGenPythia. | |
896 | ||
897 | if (R__b.IsReading()) { | |
898 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
899 | AliGenerator::Streamer(R__b); | |
900 | R__b >> (Int_t&)fProcess; | |
901 | R__b >> (Int_t&)fStrucFunc; | |
902 | R__b >> (Int_t&)fForceDecay; | |
903 | R__b >> fEnergyCMS; | |
904 | R__b >> fKineBias; | |
905 | R__b >> fTrials; | |
906 | fParentSelect.Streamer(R__b); | |
907 | fChildSelect.Streamer(R__b); | |
908 | R__b >> fXsection; | |
909 | // (AliPythia::Instance())->Streamer(R__b); | |
910 | R__b >> fPtHardMin; | |
911 | R__b >> fPtHardMax; | |
912 | // if (fDecayer) fDecayer->Streamer(R__b); | |
913 | } else { | |
914 | R__b.WriteVersion(AliGenPythia::IsA()); | |
915 | AliGenerator::Streamer(R__b); | |
916 | R__b << (Int_t)fProcess; | |
917 | R__b << (Int_t)fStrucFunc; | |
918 | R__b << (Int_t)fForceDecay; | |
919 | R__b << fEnergyCMS; | |
920 | R__b << fKineBias; | |
921 | R__b << fTrials; | |
922 | fParentSelect.Streamer(R__b); | |
923 | fChildSelect.Streamer(R__b); | |
924 | R__b << fXsection; | |
925 | // R__b << fPythia; | |
926 | R__b << fPtHardMin; | |
927 | R__b << fPtHardMax; | |
928 | // fDecayer->Streamer(R__b); | |
929 | } | |
930 | } | |
a8a6107b | 931 | #endif |
18edb254 | 932 |