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 | |