]>
Commit | Line | Data |
---|---|---|
4c039060 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
a99cf51f | 18 | Revision 1.38 2001/07/13 10:58:54 morsch |
19 | - Some coded moved to AliGenMC | |
20 | - Improved handling of secondary vertices. | |
21 | ||
fff02fee | 22 | Revision 1.37 2001/06/28 11:17:28 morsch |
23 | SetEventListRange setter added. Events in specified range are listed for | |
24 | debugging. (Yuri Kharlov) | |
25 | ||
11dfaf8d | 26 | Revision 1.36 2001/03/30 07:05:49 morsch |
27 | Final print-out in finish run. | |
28 | Write parton system for jet-production (preliminary solution). | |
29 | ||
9be6226f | 30 | Revision 1.35 2001/03/09 13:03:40 morsch |
31 | Process_t and Struc_Func_t moved to AliPythia.h | |
32 | ||
f1a48a38 | 33 | Revision 1.34 2001/02/14 15:50:40 hristov |
34 | The last particle in event marked using SetHighWaterMark | |
35 | ||
28adac24 | 36 | Revision 1.33 2001/01/30 09:23:12 hristov |
37 | Streamers removed (R.Brun) | |
38 | ||
a8a6107b | 39 | Revision 1.32 2001/01/26 19:55:51 hristov |
40 | Major upgrade of AliRoot code | |
41 | ||
2ab0c725 | 42 | Revision 1.31 2001/01/17 10:54:31 hristov |
43 | Better protection against FPE | |
44 | ||
0f9e52a3 | 45 | Revision 1.30 2000/12/18 08:55:35 morsch |
46 | Make AliPythia dependent generartors work with new scheme of random number generation | |
47 | ||
3356c022 | 48 | Revision 1.29 2000/12/04 11:22:03 morsch |
49 | Init of sRandom as in 1.15 | |
50 | ||
097ec7c1 | 51 | Revision 1.28 2000/12/02 11:41:39 morsch |
52 | Use SetRandom() to initialize random number generator in constructor. | |
53 | ||
1ed25e11 | 54 | Revision 1.27 2000/11/30 20:29:02 morsch |
55 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
56 | ||
ad1df918 | 57 | Revision 1.26 2000/11/30 07:12:50 alibrary |
58 | Introducing new Rndm and QA classes | |
59 | ||
65fb704d | 60 | Revision 1.25 2000/10/18 19:11:27 hristov |
61 | Division by zero fixed | |
62 | ||
919c2096 | 63 | Revision 1.24 2000/09/18 10:41:35 morsch |
64 | Add possibility to use nuclear structure functions from PDF library V8. | |
65 | ||
811826d8 | 66 | Revision 1.23 2000/09/14 14:05:40 morsch |
67 | dito | |
68 | ||
819f84ad | 69 | Revision 1.22 2000/09/14 14:02:22 morsch |
70 | - Correct conversion from mm to cm when passing particle vertex to MC. | |
71 | - Correct handling of fForceDecay == all. | |
72 | ||
4451ef92 | 73 | Revision 1.21 2000/09/12 14:14:55 morsch |
74 | Call fDecayer->ForceDecay() at the beginning of Generate(). | |
75 | ||
00d6ce7d | 76 | Revision 1.20 2000/09/06 14:29:33 morsch |
77 | Use AliPythia for event generation an AliDecayPythia for decays. | |
78 | Correct handling of "nodecay" option | |
79 | ||
18edb254 | 80 | Revision 1.19 2000/07/11 18:24:56 fca |
81 | Coding convention corrections + few minor bug fixes | |
82 | ||
aee8290b | 83 | Revision 1.18 2000/06/30 12:40:34 morsch |
84 | Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to | |
85 | Geant units (cm). | |
86 | ||
1512e357 | 87 | Revision 1.17 2000/06/09 20:34:07 morsch |
88 | All coding rule violations except RS3 corrected | |
89 | ||
f87cfe57 | 90 | Revision 1.16 2000/05/15 15:04:20 morsch |
91 | The full event is written for fNtrack = -1 | |
92 | Coding rule violations corrected. | |
93 | ||
5ddeb374 | 94 | Revision 1.15 2000/04/26 10:14:24 morsch |
95 | Particles array has one entry more than pythia particle list. Upper bound of | |
96 | particle loop changed to np-1 (R. Guernane, AM) | |
97 | ||
2a0e6f5b | 98 | Revision 1.14 2000/04/05 08:36:13 morsch |
99 | Check status code of particles in Pythia event | |
100 | to avoid double counting as partonic state and final state particle. | |
101 | ||
23211d3e | 102 | Revision 1.13 1999/11/09 07:38:48 fca |
103 | Changes for compatibility with version 2.23 of ROOT | |
104 | ||
084c1b4a | 105 | Revision 1.12 1999/11/03 17:43:20 fca |
106 | New version from G.Martinez & A.Morsch | |
107 | ||
886b6f73 | 108 | Revision 1.11 1999/09/29 09:24:14 fca |
109 | Introduction of the Copyright and cvs Log | |
4c039060 | 110 | */ |
111 | ||
fe4da5cc | 112 | #include "AliGenPythia.h" |
fff02fee | 113 | #include "AliGenPythiaEventHeader.h" |
18edb254 | 114 | #include "AliDecayerPythia.h" |
fe4da5cc | 115 | #include "AliRun.h" |
116 | #include "AliPythia.h" | |
18edb254 | 117 | #include "AliPDG.h" |
1578254f | 118 | #include <TParticle.h> |
18edb254 | 119 | #include <TSystem.h> |
f87cfe57 | 120 | |
fe4da5cc | 121 | ClassImp(AliGenPythia) |
122 | ||
123 | AliGenPythia::AliGenPythia() | |
fff02fee | 124 | :AliGenMC() |
fe4da5cc | 125 | { |
18edb254 | 126 | // Default Constructor |
127 | fDecayer = new AliDecayerPythia(); | |
11dfaf8d | 128 | SetEventListRange(); |
fe4da5cc | 129 | } |
130 | ||
131 | AliGenPythia::AliGenPythia(Int_t npart) | |
fff02fee | 132 | :AliGenMC(npart) |
fe4da5cc | 133 | { |
134 | // default charm production at 5. 5 TeV | |
135 | // semimuonic decay | |
136 | // structure function GRVHO | |
137 | // | |
138 | fXsection = 0.; | |
811826d8 | 139 | fNucA1=0; |
140 | fNucA2=0; | |
fe4da5cc | 141 | SetProcess(); |
142 | SetStrucFunc(); | |
886b6f73 | 143 | SetForceDecay(); |
fe4da5cc | 144 | SetPtHard(); |
145 | SetEnergyCMS(); | |
18edb254 | 146 | fDecayer = new AliDecayerPythia(); |
1ed25e11 | 147 | // Set random number generator |
097ec7c1 | 148 | sRandom=fRandom; |
11dfaf8d | 149 | SetEventListRange(); |
fff02fee | 150 | fFlavorSelect = 0; |
151 | // Produced particles | |
152 | fParticles = new TClonesArray("TParticle",1000); | |
fe4da5cc | 153 | } |
154 | ||
f87cfe57 | 155 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
156 | { | |
157 | // copy constructor | |
158 | } | |
159 | ||
fe4da5cc | 160 | AliGenPythia::~AliGenPythia() |
161 | { | |
5ddeb374 | 162 | // Destructor |
fe4da5cc | 163 | } |
164 | ||
11dfaf8d | 165 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
166 | { | |
167 | // Set a range of event numbers, for which a table | |
168 | // of generated particle will be printed | |
169 | fDebugEventFirst = eventFirst; | |
170 | fDebugEventLast = eventLast; | |
171 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; | |
172 | } | |
173 | ||
fe4da5cc | 174 | void AliGenPythia::Init() |
175 | { | |
5ddeb374 | 176 | // Initialisation |
18edb254 | 177 | SetMC(AliPythia::Instance()); |
fe4da5cc | 178 | fPythia=(AliPythia*) fgMCEvGen; |
179 | // | |
180 | fParentWeight=1./Float_t(fNpart); | |
181 | // | |
182 | // Forward Paramters to the AliPythia object | |
00d6ce7d | 183 | fDecayer->SetForceDecay(fForceDecay); |
18edb254 | 184 | fDecayer->Init(); |
00d6ce7d | 185 | |
18edb254 | 186 | |
fe4da5cc | 187 | fPythia->SetCKIN(3,fPtHardMin); |
188 | fPythia->SetCKIN(4,fPtHardMax); | |
811826d8 | 189 | if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); |
fe4da5cc | 190 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
18edb254 | 191 | |
192 | // fPythia->Pylist(0); | |
193 | // fPythia->Pystat(2); | |
fe4da5cc | 194 | // Parent and Children Selection |
195 | switch (fProcess) | |
196 | { | |
f1a48a38 | 197 | case kPyCharm: |
fff02fee | 198 | fParentSelect[0] = 411; |
199 | fParentSelect[1] = 421; | |
200 | fParentSelect[2] = 431; | |
201 | fParentSelect[3] = 4122; | |
202 | fFlavorSelect = 4; | |
fe4da5cc | 203 | break; |
f1a48a38 | 204 | case kPyCharmUnforced: |
fff02fee | 205 | fParentSelect[0] = 411; |
206 | fParentSelect[1] = 421; | |
207 | fParentSelect[2] = 431; | |
208 | fParentSelect[3]= 4122; | |
209 | fFlavorSelect = 4; | |
fe4da5cc | 210 | break; |
f1a48a38 | 211 | case kPyBeauty: |
fff02fee | 212 | fParentSelect[0]= 511; |
213 | fParentSelect[1]= 521; | |
214 | fParentSelect[2]= 531; | |
215 | fParentSelect[3]= 5122; | |
216 | fParentSelect[4]= 5132; | |
217 | fParentSelect[5]= 5232; | |
218 | fParentSelect[6]= 5332; | |
219 | fFlavorSelect = 5; | |
fe4da5cc | 220 | break; |
f1a48a38 | 221 | case kPyBeautyUnforced: |
fff02fee | 222 | fParentSelect[0] = 511; |
223 | fParentSelect[1] = 521; | |
224 | fParentSelect[2] = 531; | |
225 | fParentSelect[3] = 5122; | |
226 | fParentSelect[4] = 5132; | |
227 | fParentSelect[5] = 5232; | |
228 | fParentSelect[6] = 5332; | |
229 | fFlavorSelect = 5; | |
fe4da5cc | 230 | break; |
f1a48a38 | 231 | case kPyJpsiChi: |
232 | case kPyJpsi: | |
fff02fee | 233 | fParentSelect[0] = 443; |
fe4da5cc | 234 | break; |
f1a48a38 | 235 | case kPyMb: |
236 | case kPyJets: | |
237 | case kPyDirectGamma: | |
5be1fe76 | 238 | break; |
fe4da5cc | 239 | } |
fff02fee | 240 | AliGenMC::Init(); |
fe4da5cc | 241 | } |
242 | ||
243 | void AliGenPythia::Generate() | |
244 | { | |
5ddeb374 | 245 | // Generate one event |
00d6ce7d | 246 | fDecayer->ForceDecay(); |
fe4da5cc | 247 | |
9be6226f | 248 | Float_t polar[3] = {0,0,0}; |
249 | Float_t origin[3] = {0,0,0}; | |
9be6226f | 250 | Float_t origin0[3] = {0,0,0}; |
fff02fee | 251 | Float_t p[3]; |
5be1fe76 | 252 | // converts from mm/c to s |
253 | const Float_t kconv=0.001/2.999792458e8; | |
fe4da5cc | 254 | // |
fe4da5cc | 255 | Int_t nt=0; |
256 | Int_t jev=0; | |
7921755b | 257 | Int_t j, kf; |
fe4da5cc | 258 | fTrials=0; |
fff02fee | 259 | |
260 | // Set collision vertex position | |
fe4da5cc | 261 | for (j=0;j<3;j++) origin0[j]=fOrigin[j]; |
aee8290b | 262 | if(fVertexSmear==kPerEvent) { |
1512e357 | 263 | fPythia->SetMSTP(151,1); |
fe4da5cc | 264 | for (j=0;j<3;j++) { |
fff02fee | 265 | fPythia->SetPARP(151+j, fOsigma[j]*10.); |
fe4da5cc | 266 | } |
aee8290b | 267 | } else if (fVertexSmear==kPerTrack) { |
fe4da5cc | 268 | fPythia->SetMSTP(151,0); |
fe4da5cc | 269 | } |
fff02fee | 270 | // event loop |
fe4da5cc | 271 | while(1) |
272 | { | |
084c1b4a | 273 | fPythia->Pyevnt(); |
11dfaf8d | 274 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
275 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); | |
fe4da5cc | 276 | fTrials++; |
fff02fee | 277 | fPythia->ImportParticles(fParticles,"All"); |
278 | ||
279 | // | |
280 | // | |
281 | // | |
282 | Int_t i; | |
283 | ||
284 | Int_t np = fParticles->GetEntriesFast(); | |
285 | Int_t* pParent = new Int_t[np]; | |
286 | Int_t* pSelected = new Int_t[np]; | |
287 | Int_t* trackIt = new Int_t[np]; | |
288 | for (i=0; i< np-1; i++) { | |
289 | pParent[i] = -1; | |
290 | pSelected[i] = 0; | |
291 | } | |
fe4da5cc | 292 | printf("\n **************************************************%d\n",np); |
fff02fee | 293 | Int_t nc = 0; |
fe4da5cc | 294 | if (np == 0 ) continue; |
f1a48a38 | 295 | if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma) { |
fff02fee | 296 | for (i = 0; i<np-1; i++) { |
297 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
23211d3e | 298 | Int_t ks = iparticle->GetStatusCode(); |
a8228d85 | 299 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
fff02fee | 300 | // No initial state partons |
2a0e6f5b | 301 | if (ks==21) continue; |
fe4da5cc | 302 | // |
fff02fee | 303 | // Heavy Flavor Selection |
5be1fe76 | 304 | // |
fff02fee | 305 | // quark ? |
306 | kf = TMath::Abs(kf); | |
307 | Int_t kfl = kf; | |
308 | // meson ? | |
309 | if (kfl > 10) kfl/=100; | |
310 | // baryon | |
311 | if (kfl > 10) kfl/=10; | |
312 | if (kfl > 10) kfl/=10; | |
313 | ||
314 | Int_t ipa = iparticle->GetFirstMother()-1; | |
315 | Int_t kfMo = 0; | |
316 | ||
317 | if (ipa > -1) { | |
318 | TParticle * mother = (TParticle *) fParticles->At(ipa); | |
319 | kfMo = TMath::Abs(mother->GetPdgCode()); | |
320 | } | |
321 | // printf("\n particle (all) %d %d %d", i, pSelected[i], kf); | |
322 | if (kfl >= fFlavorSelect) { | |
5be1fe76 | 323 | // |
fff02fee | 324 | // Heavy flavor hadron or quark |
fe4da5cc | 325 | // |
fff02fee | 326 | // Kinematic seletion on final state heavy flavor mesons |
327 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) | |
328 | { | |
329 | nc = -1; | |
330 | break; | |
331 | } | |
332 | pSelected[i] = 1; | |
333 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); | |
334 | } else { | |
335 | // Kinematic seletion on decay products | |
336 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) | |
337 | && !KinematicSelection(iparticle, 1)) | |
338 | { | |
339 | nc = -1; | |
340 | break; | |
341 | } | |
fe4da5cc | 342 | // |
fff02fee | 343 | // Decay products |
344 | // Select if mother was selected and is not tracked | |
345 | ||
346 | if (pSelected[ipa] && | |
347 | !trackIt[ipa] && // mother will be tracked ? | |
348 | kfMo != 5 && // mother is b-quark, don't store fragments | |
349 | kfMo != 4 && // mother is c-quark, don't store fragments | |
350 | kf != 92) // don't store string | |
351 | { | |
fe4da5cc | 352 | // |
fff02fee | 353 | // Semi-stable or de-selected: diselect decay products: |
fe4da5cc | 354 | // |
5be1fe76 | 355 | // |
fff02fee | 356 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > 10e-15) |
357 | { | |
358 | Int_t ipF = iparticle->GetFirstDaughter(); | |
359 | Int_t ipL = iparticle->GetLastDaughter(); | |
360 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; | |
361 | } | |
362 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); | |
363 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; | |
364 | } | |
365 | } | |
366 | if (pSelected[i] == -1) pSelected[i] = 0; | |
367 | if (!pSelected[i]) continue; | |
368 | nc++; | |
369 | // Decision on tracking | |
370 | trackIt[i] = 0; | |
371 | // | |
372 | // Track final state particle | |
373 | if (ks == 1) trackIt[i] = 1; | |
374 | // Track semi-stable particles | |
375 | if ((ks ==1) || (fDecayer->GetLifetime(kf)> 10e-15)) trackIt[i] = 1; | |
376 | // Track particles selected by process if undecayed. | |
377 | if (fForceDecay == kNoDecay) { | |
378 | if (ParentSelected(kf)) trackIt[i] = 1; | |
379 | } else { | |
380 | if (ParentSelected(kf)) trackIt[i] = 0; | |
381 | } | |
382 | // | |
383 | // | |
384 | ||
385 | } // particle selection loop | |
386 | if (nc > -1) { | |
387 | for (i = 0; i<np-1; i++) { | |
388 | if (!pSelected[i]) continue; | |
389 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
390 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
9be6226f | 391 | p[0]=iparticle->Px(); |
392 | p[1]=iparticle->Py(); | |
393 | p[2]=iparticle->Pz(); | |
394 | origin[0]=origin0[0]+iparticle->Vx()/10.; | |
395 | origin[1]=origin0[1]+iparticle->Vy()/10.; | |
396 | origin[2]=origin0[2]+iparticle->Vz()/10.; | |
397 | Float_t tof=kconv*iparticle->T(); | |
fff02fee | 398 | Int_t ipa = iparticle->GetFirstMother()-1; |
399 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; | |
400 | // printf("\n SetTrack %d %d %d %d", i, iparent, kf, trackIt[i]); | |
a99cf51f | 401 | SetTrack(fTrackIt*trackIt[i] , |
fff02fee | 402 | iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1.); |
403 | pParent[i] = nt; | |
a99cf51f | 404 | KeepTrack(nt); |
fff02fee | 405 | } // SetTrack loop |
406 | } | |
407 | } else { | |
408 | nc = GenerateMB(); | |
5be1fe76 | 409 | } // mb ? |
fff02fee | 410 | |
fe4da5cc | 411 | if (nc > 0) { |
5be1fe76 | 412 | jev+=nc; |
5ddeb374 | 413 | if (jev >= fNpart || fNpart == -1) { |
fe4da5cc | 414 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
23211d3e | 415 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
fe4da5cc | 416 | break; |
417 | } | |
418 | } | |
419 | } // event loop | |
a99cf51f | 420 | SetHighWaterMark(nt); |
fe4da5cc | 421 | // adjust weight due to kinematic selection |
422 | AdjustWeights(); | |
423 | // get cross-section | |
424 | fXsection=fPythia->GetPARI(1); | |
425 | } | |
426 | ||
fff02fee | 427 | Int_t AliGenPythia::GenerateMB() |
fe4da5cc | 428 | { |
fff02fee | 429 | Int_t i, kf, nt, iparent; |
430 | Int_t nc = 0; | |
431 | Float_t p[3]; | |
432 | Float_t polar[3] = {0,0,0}; | |
433 | Float_t origin[3] = {0,0,0}; | |
434 | Float_t origin0[3] = {0,0,0}; | |
435 | // converts from mm/c to s | |
436 | const Float_t kconv=0.001/2.999792458e8; | |
4451ef92 | 437 | |
fff02fee | 438 | Int_t np = fParticles->GetEntriesFast(); |
439 | Int_t* pParent = new Int_t[np]; | |
440 | for (i=0; i< np-1; i++) pParent[i] = -1; | |
441 | ||
442 | for (i = 0; i<np-1; i++) { | |
443 | Int_t trackIt = 0; | |
444 | TParticle * iparticle = (TParticle *) fParticles->At(i); | |
445 | kf = CheckPDGCode(iparticle->GetPdgCode()); | |
446 | Int_t ks = iparticle->GetStatusCode(); | |
447 | Int_t km = iparticle->GetFirstMother(); | |
448 | // printf("\n Particle: %d %d %d", i, kf, ks); | |
449 | ||
450 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || | |
451 | (ks != 1) || | |
452 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { | |
453 | nc++; | |
454 | if (ks == 1) trackIt = 1; | |
455 | Int_t ipa = iparticle->GetFirstMother()-1; | |
fe4da5cc | 456 | |
fff02fee | 457 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
fe4da5cc | 458 | |
459 | // | |
fff02fee | 460 | // store track information |
461 | p[0]=iparticle->Px(); | |
462 | p[1]=iparticle->Py(); | |
463 | p[2]=iparticle->Pz(); | |
464 | origin[0]=origin0[0]+iparticle->Vx()/10.; | |
465 | origin[1]=origin0[1]+iparticle->Vy()/10.; | |
466 | origin[2]=origin0[2]+iparticle->Vz()/10.; | |
467 | Float_t tof=kconv*iparticle->T(); | |
a99cf51f | 468 | SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, |
fff02fee | 469 | tof, kPPrimary, nt); |
a99cf51f | 470 | KeepTrack(nt); |
fff02fee | 471 | pParent[i] = nt; |
472 | } // select particle | |
473 | } // particle loop | |
474 | ||
475 | if (pParent) delete[] pParent; | |
fe4da5cc | 476 | |
fff02fee | 477 | printf("\n I've put %i particles on the stack \n",nc); |
478 | MakeHeader(); | |
479 | return nc; | |
480 | } | |
fe4da5cc | 481 | |
fe4da5cc | 482 | |
fff02fee | 483 | void AliGenPythia::FinishRun() |
484 | { | |
485 | // Print x-section summary | |
486 | fPythia->Pystat(1); | |
fe4da5cc | 487 | } |
fff02fee | 488 | |
fe4da5cc | 489 | void AliGenPythia::AdjustWeights() |
490 | { | |
5ddeb374 | 491 | // Adjust the weights after generation of all events |
492 | // | |
5ddeb374 | 493 | TParticle *part; |
fe4da5cc | 494 | Int_t ntrack=gAlice->GetNtrack(); |
495 | for (Int_t i=0; i<ntrack; i++) { | |
2ab0c725 | 496 | part= gAlice->Particle(i); |
5ddeb374 | 497 | part->SetWeight(part->GetWeight()*fKineBias); |
fe4da5cc | 498 | } |
499 | } | |
811826d8 | 500 | |
501 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) | |
502 | { | |
503 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
504 | fNucA1 = a1; | |
505 | fNucA2 = a2; | |
506 | } | |
fff02fee | 507 | |
508 | ||
509 | void AliGenPythia::MakeHeader() | |
510 | { | |
511 | // Builds the event header, to be called after each event | |
512 | AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); | |
513 | ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); | |
514 | gAlice->SetGenEventHeader(header); | |
515 | } | |
811826d8 | 516 | |
517 | ||
f87cfe57 | 518 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
519 | { | |
520 | // Assignment operator | |
521 | return *this; | |
522 | } | |
fe4da5cc | 523 | |
524 | ||
811826d8 | 525 | |
a8a6107b | 526 | #ifdef never |
18edb254 | 527 | void AliGenPythia::Streamer(TBuffer &R__b) |
528 | { | |
529 | // Stream an object of class AliGenPythia. | |
530 | ||
531 | if (R__b.IsReading()) { | |
532 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } | |
533 | AliGenerator::Streamer(R__b); | |
534 | R__b >> (Int_t&)fProcess; | |
535 | R__b >> (Int_t&)fStrucFunc; | |
536 | R__b >> (Int_t&)fForceDecay; | |
537 | R__b >> fEnergyCMS; | |
538 | R__b >> fKineBias; | |
539 | R__b >> fTrials; | |
540 | fParentSelect.Streamer(R__b); | |
541 | fChildSelect.Streamer(R__b); | |
542 | R__b >> fXsection; | |
543 | // (AliPythia::Instance())->Streamer(R__b); | |
544 | R__b >> fPtHardMin; | |
545 | R__b >> fPtHardMax; | |
546 | // if (fDecayer) fDecayer->Streamer(R__b); | |
547 | } else { | |
548 | R__b.WriteVersion(AliGenPythia::IsA()); | |
549 | AliGenerator::Streamer(R__b); | |
550 | R__b << (Int_t)fProcess; | |
551 | R__b << (Int_t)fStrucFunc; | |
552 | R__b << (Int_t)fForceDecay; | |
553 | R__b << fEnergyCMS; | |
554 | R__b << fKineBias; | |
555 | R__b << fTrials; | |
556 | fParentSelect.Streamer(R__b); | |
557 | fChildSelect.Streamer(R__b); | |
558 | R__b << fXsection; | |
559 | // R__b << fPythia; | |
560 | R__b << fPtHardMin; | |
561 | R__b << fPtHardMax; | |
562 | // fDecayer->Streamer(R__b); | |
563 | } | |
564 | } | |
a8a6107b | 565 | #endif |
18edb254 | 566 |