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110410f9 | 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 | $Log$ | |
116cbefd | 18 | Revision 1.46 2003/01/07 14:12:33 morsch |
19 | Provides collision geometry. | |
20 | ||
96a7d299 | 21 | Revision 1.45 2002/12/16 09:44:49 morsch |
22 | Default for fRadiation is 3. | |
23 | ||
83a26417 | 24 | Revision 1.44 2002/10/14 14:55:35 hristov |
25 | Merging the VirtualMC branch to the main development branch (HEAD) | |
26 | ||
b9d0a01d | 27 | Revision 1.42.4.1 2002/08/28 15:06:50 alibrary |
28 | Updating to v3-09-01 | |
29 | ||
30 | Revision 1.43 2002/08/09 12:09:52 morsch | |
31 | Direct gamma trigger correctly included. | |
32 | ||
7a013373 | 33 | Revision 1.42 2002/03/12 11:07:08 morsch |
34 | Add status code of particle to SetTrack call. | |
35 | ||
0d7c70a0 | 36 | Revision 1.41 2002/03/05 11:25:33 morsch |
37 | - New quenching options | |
38 | - Correction in CheckTrigger() | |
39 | ||
9bf3f17b | 40 | Revision 1.40 2002/02/12 11:05:53 morsch |
41 | Get daughter indices right. | |
42 | ||
f477ff09 | 43 | Revision 1.39 2002/02/12 09:16:39 morsch |
44 | Correction in SelectFlavor() | |
45 | ||
cdd538f1 | 46 | Revision 1.38 2002/02/12 08:53:21 morsch |
47 | SetNoGammas can be used to inhibit writing of gammas and pi0. | |
48 | ||
0b22c984 | 49 | Revision 1.37 2002/02/08 16:50:50 morsch |
50 | Add name and title in constructor. | |
51 | ||
8b31bfac | 52 | Revision 1.36 2002/01/31 20:17:55 morsch |
53 | Allow for triggered jets with simplified topology: Exact pT, back-to-back | |
54 | ||
3792091f | 55 | Revision 1.35 2001/12/13 07:56:25 hristov |
56 | Set pointers to zero in the default constructor | |
57 | ||
60b030a9 | 58 | Revision 1.34 2001/12/11 16:55:42 morsch |
59 | Correct initialization for jet phi-range. | |
60 | ||
777b4893 | 61 | Revision 1.33 2001/12/05 10:18:51 morsch |
62 | Possibility of kinematic biasing of jet phi range. (J. Klay) | |
63 | ||
7a186781 | 64 | Revision 1.32 2001/11/28 13:51:11 morsch |
65 | Introduce kinematic biasing (etamin, etamax) of jet trigger. Bookkeeping | |
66 | (number of trials) done in AliGenHijingEventHeader. | |
67 | ||
e4ffda63 | 68 | Revision 1.31 2001/11/06 12:30:34 morsch |
69 | Add Boost() method to boost all particles to LHC lab frame. Needed for asymmetric collision systems. | |
70 | ||
cc71f2d3 | 71 | Revision 1.30 2001/10/21 18:35:56 hristov |
72 | Several pointers were set to zero in the default constructors to avoid memory management problems | |
73 | ||
2685bf00 | 74 | Revision 1.29 2001/10/15 08:12:24 morsch |
75 | - Vertex smearing with truncated gaussian. | |
76 | - Store triggered jet info before and after final state radiation into mc-heade | |
77 | ||
f8b85aa9 | 78 | Revision 1.28 2001/10/08 11:55:25 morsch |
79 | Store 4-momenta of trigegred jets in event header. | |
80 | Possibility to switch of initial and final state radiation. | |
81 | ||
332c8db0 | 82 | Revision 1.27 2001/10/08 07:13:14 morsch |
83 | Add setter for minimum transverse momentum of triggered jet. | |
84 | ||
ed6361b0 | 85 | Revision 1.26 2001/10/04 08:12:24 morsch |
86 | Redefinition of stable condition. | |
87 | ||
79bf94df | 88 | Revision 1.25 2001/07/27 17:09:36 morsch |
89 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
90 | to delegate either to local stack or to stack owned by AliRun. | |
91 | (Piotr Skowronski, A.M.) | |
92 | ||
a99cf51f | 93 | Revision 1.24 2001/07/20 09:34:56 morsch |
94 | Count the number of spectator neutrons and protons and add information | |
95 | to the event header. (Chiara Oppedisano) | |
96 | ||
b46f2676 | 97 | Revision 1.23 2001/07/13 17:30:22 morsch |
98 | Derive from AliGenMC. | |
99 | ||
55d6adcf | 100 | Revision 1.22 2001/06/11 13:09:23 morsch |
101 | - Store cross-Section and number of binary collisions as a function of impact parameter | |
102 | - Pass AliGenHijingEventHeader to gAlice. | |
103 | ||
21ce2e6f | 104 | Revision 1.21 2001/02/28 17:35:24 morsch |
105 | Consider elastic interactions (ks = 1 and ks = 11) as spectator (Chiara Oppedisano) | |
106 | ||
cf6bac7b | 107 | Revision 1.20 2001/02/14 15:50:40 hristov |
108 | The last particle in event marked using SetHighWaterMark | |
109 | ||
28adac24 | 110 | Revision 1.19 2000/12/21 16:24:06 morsch |
111 | Coding convention clean-up | |
112 | ||
675e9664 | 113 | Revision 1.18 2000/12/06 17:46:30 morsch |
114 | Avoid random numbers 1 and 0. | |
115 | ||
7498b3ad | 116 | Revision 1.17 2000/12/04 11:22:03 morsch |
117 | Init of sRandom as in 1.15 | |
118 | ||
097ec7c1 | 119 | Revision 1.16 2000/12/02 11:41:39 morsch |
120 | Use SetRandom() to initialize random number generator in constructor. | |
121 | ||
1ed25e11 | 122 | Revision 1.15 2000/11/30 20:29:02 morsch |
123 | Initialise static variable sRandom in constructor: sRandom = fRandom; | |
124 | ||
ad1df918 | 125 | Revision 1.14 2000/11/30 07:12:50 alibrary |
126 | Introducing new Rndm and QA classes | |
127 | ||
65fb704d | 128 | Revision 1.13 2000/11/09 17:40:27 morsch |
129 | Possibility to select/unselect spectator protons and neutrons. | |
130 | Method SetSpectators(Int_t spect) added. (FCA, Ch. Oppedisano) | |
131 | ||
2705454f | 132 | Revision 1.12 2000/10/20 13:38:38 morsch |
133 | Debug printouts commented. | |
134 | ||
1df2195f | 135 | Revision 1.11 2000/10/20 13:22:26 morsch |
136 | - skip particle type 92 (string) | |
137 | - Charmed and beauty baryions (5122, 4122) are considered as stable consistent with | |
138 | mesons. | |
139 | ||
608708ba | 140 | Revision 1.10 2000/10/17 15:10:20 morsch |
141 | Write first all the parent particles to the stack and then the final state particles. | |
142 | ||
e06552ba | 143 | Revision 1.9 2000/10/17 13:38:59 morsch |
144 | Protection against division by zero in EvaluateCrossSection() and KinematicSelection(..) (FCA) | |
145 | ||
c007646a | 146 | Revision 1.8 2000/10/17 12:46:31 morsch |
147 | Protect EvaluateCrossSections() against division by zero. | |
148 | ||
73bc6a56 | 149 | Revision 1.7 2000/10/02 21:28:06 fca |
150 | Removal of useless dependecies via forward declarations | |
151 | ||
94de3818 | 152 | Revision 1.6 2000/09/11 13:23:37 morsch |
153 | Write last seed to file (fortran lun 50) and reed back from same lun using calls to | |
154 | luget_hijing and luset_hijing. | |
155 | ||
b78ff279 | 156 | Revision 1.5 2000/09/07 16:55:40 morsch |
157 | fHijing->Initialize(); after change of parameters. (Dmitri Yurevitch Peressounko) | |
158 | ||
ba244bac | 159 | Revision 1.4 2000/07/11 18:24:56 fca |
160 | Coding convention corrections + few minor bug fixes | |
161 | ||
aee8290b | 162 | Revision 1.3 2000/06/30 12:08:36 morsch |
163 | In member data: char* replaced by TString, Init takes care of resizing the strings to | |
164 | 8 characters required by Hijing. | |
165 | ||
3b8bd63f | 166 | Revision 1.2 2000/06/15 14:15:05 morsch |
167 | Add possibility for heavy flavor selection: charm and beauty. | |
168 | ||
eb342d2d | 169 | Revision 1.1 2000/06/09 20:47:27 morsch |
170 | AliGenerator interface class to HIJING using THijing (test version) | |
171 | ||
110410f9 | 172 | */ |
173 | ||
675e9664 | 174 | |
175 | ||
176 | // Generator using HIJING as an external generator | |
177 | // The main HIJING options are accessable for the user through this interface. | |
178 | // Uses the THijing implementation of TGenerator. | |
179 | // | |
180 | // andreas.morsch@cern.ch | |
181 | ||
110410f9 | 182 | #include <TArrayI.h> |
21ce2e6f | 183 | #include <TGraph.h> |
116cbefd | 184 | #include <THijing.h> |
332c8db0 | 185 | #include <TLorentzVector.h> |
116cbefd | 186 | #include <TPDGCode.h> |
187 | #include <TParticle.h> | |
188 | ||
189 | #include "AliGenHijing.h" | |
190 | #include "AliGenHijingEventHeader.h" | |
191 | #include "AliRun.h" | |
110410f9 | 192 | |
ad1df918 | 193 | |
116cbefd | 194 | ClassImp(AliGenHijing) |
110410f9 | 195 | |
196 | AliGenHijing::AliGenHijing() | |
55d6adcf | 197 | :AliGenMC() |
110410f9 | 198 | { |
199 | // Constructor | |
7a013373 | 200 | fParticles = 0; |
201 | fHijing = 0; | |
202 | fDsigmaDb = 0; | |
203 | fDnDb = 0; | |
110410f9 | 204 | } |
205 | ||
206 | AliGenHijing::AliGenHijing(Int_t npart) | |
55d6adcf | 207 | :AliGenMC(npart) |
110410f9 | 208 | { |
209 | // Default PbPb collisions at 5. 5 TeV | |
210 | // | |
8b31bfac | 211 | fName = "Hijing"; |
212 | fTitle= "Particle Generator using HIJING"; | |
213 | ||
110410f9 | 214 | SetEnergyCMS(); |
215 | SetImpactParameterRange(); | |
216 | SetTarget(); | |
217 | SetProjectile(); | |
cc71f2d3 | 218 | SetBoostLHC(); |
e4ffda63 | 219 | SetJetEtaRange(); |
777b4893 | 220 | SetJetPhiRange(); |
e4ffda63 | 221 | |
ed6361b0 | 222 | fKeep = 0; |
223 | fQuench = 1; | |
224 | fShadowing = 1; | |
225 | fTrigger = 0; | |
226 | fDecaysOff = 1; | |
227 | fEvaluate = 0; | |
228 | fSelectAll = 0; | |
229 | fFlavor = 0; | |
230 | fSpectators = 1; | |
231 | fDsigmaDb = 0; | |
232 | fDnDb = 0; | |
233 | fPtMinJet = -2.5; | |
83a26417 | 234 | fRadiation = 3; |
f8b85aa9 | 235 | fEventVertex.Set(3); |
3792091f | 236 | // |
237 | SetSimpleJets(); | |
0b22c984 | 238 | SetNoGammas(); |
7a013373 | 239 | // |
240 | fParticles = new TClonesArray("TParticle",10000); | |
ad1df918 | 241 | // |
1ed25e11 | 242 | // Set random number generator |
097ec7c1 | 243 | sRandom = fRandom; |
2685bf00 | 244 | fHijing = 0; |
245 | ||
110410f9 | 246 | } |
247 | ||
248 | AliGenHijing::AliGenHijing(const AliGenHijing & Hijing) | |
249 | { | |
250 | // copy constructor | |
251 | } | |
252 | ||
253 | ||
254 | AliGenHijing::~AliGenHijing() | |
255 | { | |
256 | // Destructor | |
21ce2e6f | 257 | if ( fDsigmaDb) delete fDsigmaDb; |
258 | if ( fDnDb) delete fDnDb; | |
7a013373 | 259 | delete fParticles; |
110410f9 | 260 | } |
261 | ||
262 | void AliGenHijing::Init() | |
263 | { | |
264 | // Initialisation | |
3b8bd63f | 265 | fFrame.Resize(8); |
266 | fTarget.Resize(8); | |
267 | fProjectile.Resize(8); | |
268 | ||
110410f9 | 269 | SetMC(new THijing(fEnergyCMS, fFrame, fProjectile, fTarget, |
270 | fAProjectile, fZProjectile, fATarget, fZTarget, | |
271 | fMinImpactParam, fMaxImpactParam)); | |
272 | ||
273 | fHijing=(THijing*) fgMCEvGen; | |
332c8db0 | 274 | fHijing->SetIHPR2(2, fRadiation); |
110410f9 | 275 | fHijing->SetIHPR2(3, fTrigger); |
110410f9 | 276 | fHijing->SetIHPR2(6, fShadowing); |
277 | fHijing->SetIHPR2(12, fDecaysOff); | |
278 | fHijing->SetIHPR2(21, fKeep); | |
ed6361b0 | 279 | fHijing->SetHIPR1(10, fPtMinJet); |
3792091f | 280 | fHijing->SetHIPR1(50, fSimpleJet); |
9bf3f17b | 281 | // |
282 | // Quenching | |
283 | // | |
284 | // | |
285 | // fQuench = 0: no quenching | |
286 | // fQuench = 1: hijing default | |
287 | // fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14) | |
288 | // fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14) | |
289 | // fQuench = 4: new LHC parameters with log(e) dependence | |
290 | // fQuench = 5: new RHIC parameters with log(e) dependence | |
291 | fHijing->SetIHPR2(50, 0); | |
292 | if (fQuench > 0) | |
293 | fHijing->SetIHPR2(4, 1); | |
294 | else | |
295 | fHijing->SetIHPR2(4, 0); | |
296 | // New LHC parameters from Xin-Nian Wang | |
297 | if (fQuench == 2) { | |
298 | fHijing->SetHIPR1(14, 1.1); | |
299 | fHijing->SetHIPR1(11, 3.7); | |
300 | } else if (fQuench == 3) { | |
301 | fHijing->SetHIPR1(14, 0.20); | |
302 | fHijing->SetHIPR1(11, 2.5); | |
303 | } else if (fQuench == 4) { | |
304 | fHijing->SetIHPR2(50, 1); | |
305 | fHijing->SetHIPR1(14, 4.*0.34); | |
306 | fHijing->SetHIPR1(11, 3.7); | |
307 | } else if (fQuench == 5) { | |
308 | fHijing->SetIHPR2(50, 1); | |
309 | fHijing->SetHIPR1(14, 0.34); | |
310 | fHijing->SetHIPR1(11, 2.5); | |
311 | } | |
312 | ||
313 | ||
314 | ||
315 | // | |
316 | // Initialize Hijing | |
317 | // | |
ba244bac | 318 | fHijing->Initialize(); |
110410f9 | 319 | // |
320 | if (fEvaluate) EvaluateCrossSections(); | |
ad1df918 | 321 | // |
110410f9 | 322 | } |
323 | ||
324 | void AliGenHijing::Generate() | |
325 | { | |
326 | // Generate one event | |
327 | ||
21ce2e6f | 328 | Float_t polar[3] = {0,0,0}; |
329 | Float_t origin[3] = {0,0,0}; | |
330 | Float_t origin0[3] = {0,0,0}; | |
28adac24 | 331 | Float_t p[3], random[6]; |
332 | Float_t tof; | |
110410f9 | 333 | |
110410f9 | 334 | // converts from mm/c to s |
21ce2e6f | 335 | const Float_t kconv = 0.001/2.999792458e8; |
110410f9 | 336 | // |
21ce2e6f | 337 | Int_t nt = 0; |
338 | Int_t jev = 0; | |
28adac24 | 339 | Int_t j, kf, ks, imo; |
21ce2e6f | 340 | kf = 0; |
eb342d2d | 341 | |
7a013373 | 342 | |
110410f9 | 343 | |
21ce2e6f | 344 | fTrials = 0; |
345 | for (j = 0;j < 3; j++) origin0[j] = fOrigin[j]; | |
346 | if(fVertexSmear == kPerEvent) { | |
f8b85aa9 | 347 | Float_t dv[3]; |
348 | dv[2] = 1.e10; | |
349 | while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) { | |
350 | Rndm(random,6); | |
351 | for (j=0; j < 3; j++) { | |
352 | dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
353 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
354 | } | |
355 | } | |
356 | for (j=0; j < 3; j++) origin0[j] += dv[j]; | |
21ce2e6f | 357 | } else if (fVertexSmear == kPerTrack) { |
28adac24 | 358 | // fHijing->SetMSTP(151,0); |
21ce2e6f | 359 | for (j = 0; j < 3; j++) { |
28adac24 | 360 | // fHijing->SetPARP(151+j, fOsigma[j]*10.); |
21ce2e6f | 361 | } |
28adac24 | 362 | } |
363 | while(1) | |
21ce2e6f | 364 | { |
365 | // Generate one event | |
b46f2676 | 366 | // -------------------------------------------------------------------------- |
367 | fSpecn = 0; | |
368 | fSpecp = 0; | |
369 | // -------------------------------------------------------------------------- | |
28adac24 | 370 | fHijing->GenerateEvent(); |
371 | fTrials++; | |
7a013373 | 372 | fHijing->ImportParticles(fParticles,"All"); |
e4ffda63 | 373 | if (fTrigger != kNoTrigger) { |
374 | if (!CheckTrigger()) continue; | |
375 | } | |
7a013373 | 376 | if (fLHC) Boost(); |
cc71f2d3 | 377 | |
e4ffda63 | 378 | |
7a013373 | 379 | Int_t np = fParticles->GetEntriesFast(); |
28adac24 | 380 | printf("\n **************************************************%d\n",np); |
21ce2e6f | 381 | Int_t nc = 0; |
28adac24 | 382 | if (np == 0 ) continue; |
383 | Int_t i; | |
f477ff09 | 384 | Int_t* newPos = new Int_t[np]; |
385 | Int_t* pSelected = new Int_t[np]; | |
28adac24 | 386 | |
f477ff09 | 387 | for (i = 0; i < np; i++) { |
388 | newPos[i] = i; | |
389 | pSelected[i] = 0; | |
390 | } | |
391 | ||
f8b85aa9 | 392 | // Get event vertex |
393 | // | |
7a013373 | 394 | TParticle * iparticle = (TParticle *) fParticles->At(0); |
f8b85aa9 | 395 | fEventVertex[0] = origin0[0]; |
396 | fEventVertex[1] = origin0[1]; | |
397 | fEventVertex[2] = origin0[2]; | |
398 | ||
e06552ba | 399 | // |
f477ff09 | 400 | // First select parent particles |
e06552ba | 401 | // |
402 | ||
21ce2e6f | 403 | for (i = 0; i < np; i++) { |
7a013373 | 404 | iparticle = (TParticle *) fParticles->At(i); |
405 | ||
e06552ba | 406 | // Is this a parent particle ? |
f8b85aa9 | 407 | if (Stable(iparticle)) continue; |
e06552ba | 408 | // |
f477ff09 | 409 | Bool_t selected = kTRUE; |
410 | Bool_t hasSelectedDaughters = kFALSE; | |
411 | ||
412 | ||
413 | kf = iparticle->GetPdgCode(); | |
414 | ks = iparticle->GetStatusCode(); | |
415 | if (kf == 92) continue; | |
e06552ba | 416 | |
f477ff09 | 417 | if (!fSelectAll) selected = KinematicSelection(iparticle, 0) && |
418 | SelectFlavor(kf); | |
7a013373 | 419 | hasSelectedDaughters = DaughtersSelection(iparticle); |
110410f9 | 420 | // |
f477ff09 | 421 | // Put particle on the stack if it is either selected or |
422 | // it is the mother of at least one seleted particle | |
e06552ba | 423 | // |
f477ff09 | 424 | if (selected || hasSelectedDaughters) { |
425 | nc++; | |
426 | pSelected[i] = 1; | |
427 | } // selected | |
28adac24 | 428 | } // particle loop parents |
e06552ba | 429 | // |
f477ff09 | 430 | // Now select the final state particles |
e06552ba | 431 | // |
432 | ||
28adac24 | 433 | for (i = 0; i<np; i++) { |
7a013373 | 434 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
e06552ba | 435 | // Is this a final state particle ? |
f477ff09 | 436 | if (!Stable(iparticle)) continue; |
437 | ||
438 | Bool_t selected = kTRUE; | |
439 | kf = iparticle->GetPdgCode(); | |
440 | ks = iparticle->GetStatusCode(); | |
7a013373 | 441 | |
b46f2676 | 442 | // -------------------------------------------------------------------------- |
443 | // Count spectator neutrons and protons | |
f477ff09 | 444 | if(ks == 0 || ks == 1 || ks == 10 || ks == 11){ |
445 | if(kf == kNeutron) fSpecn += 1; | |
446 | if(kf == kProton) fSpecp += 1; | |
447 | } | |
b46f2676 | 448 | // -------------------------------------------------------------------------- |
449 | // | |
f477ff09 | 450 | if (!fSelectAll) { |
451 | selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf); | |
452 | if (!fSpectators && selected) selected = (ks != 0 && ks != 1 && ks != 10 | |
453 | && ks != 11); | |
454 | } | |
e06552ba | 455 | // |
456 | // Put particle on the stack if selected | |
457 | // | |
f477ff09 | 458 | if (selected) { |
459 | nc++; | |
460 | pSelected[i] = 1; | |
461 | } // selected | |
28adac24 | 462 | } // particle loop final state |
f477ff09 | 463 | // |
464 | // Write particles to stack | |
465 | // | |
466 | for (i = 0; i<np; i++) { | |
7a013373 | 467 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
f477ff09 | 468 | Bool_t hasMother = (iparticle->GetFirstMother() >=0); |
469 | Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0); | |
470 | ||
471 | if (pSelected[i]) { | |
472 | kf = iparticle->GetPdgCode(); | |
0d7c70a0 | 473 | ks = iparticle->GetStatusCode(); |
f477ff09 | 474 | p[0] = iparticle->Px(); |
475 | p[1] = iparticle->Py(); | |
476 | p[2] = iparticle->Pz(); | |
477 | origin[0] = origin0[0]+iparticle->Vx()/10; | |
478 | origin[1] = origin0[1]+iparticle->Vy()/10; | |
479 | origin[2] = origin0[2]+iparticle->Vz()/10; | |
480 | tof = kconv*iparticle->T(); | |
481 | imo = -1; | |
482 | TParticle* mother = 0; | |
483 | if (hasMother) { | |
484 | imo = iparticle->GetFirstMother(); | |
7a013373 | 485 | mother = (TParticle *) fParticles->At(imo); |
f477ff09 | 486 | imo = (mother->GetPdgCode() != 92) ? imo = newPos[imo] : -1; |
487 | } // if has mother | |
488 | Bool_t tFlag = (fTrackIt && !hasDaughter); | |
489 | SetTrack(tFlag,imo,kf,p,origin,polar, | |
0d7c70a0 | 490 | tof,kPNoProcess,nt, 1., ks); |
f477ff09 | 491 | KeepTrack(nt); |
492 | newPos[i] = nt; | |
493 | } // if selected | |
494 | } // particle loop | |
79bf94df | 495 | delete[] newPos; |
f477ff09 | 496 | delete[] pSelected; |
497 | ||
28adac24 | 498 | printf("\n I've put %i particles on the stack \n",nc); |
499 | if (nc > 0) { | |
21ce2e6f | 500 | jev += nc; |
501 | if (jev >= fNpart || fNpart == -1) { | |
502 | fKineBias = Float_t(fNpart)/Float_t(fTrials); | |
503 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); | |
504 | break; | |
505 | } | |
28adac24 | 506 | } |
21ce2e6f | 507 | } // event loop |
508 | MakeHeader(); | |
a99cf51f | 509 | SetHighWaterMark(nt); |
110410f9 | 510 | } |
511 | ||
110410f9 | 512 | void AliGenHijing::KeepFullEvent() |
513 | { | |
514 | fKeep=1; | |
515 | } | |
516 | ||
517 | void AliGenHijing::EvaluateCrossSections() | |
518 | { | |
519 | // Glauber Calculation of geometrical x-section | |
520 | // | |
21ce2e6f | 521 | Float_t xTot = 0.; // barn |
522 | Float_t xTotHard = 0.; // barn | |
523 | Float_t xPart = 0.; // barn | |
524 | Float_t xPartHard = 0.; // barn | |
525 | Float_t sigmaHard = 0.1; // mbarn | |
526 | Float_t bMin = 0.; | |
527 | Float_t bMax = fHijing->GetHIPR1(34)+fHijing->GetHIPR1(35); | |
528 | const Float_t kdib = 0.2; | |
529 | Int_t kMax = Int_t((bMax-bMin)/kdib)+1; | |
110410f9 | 530 | |
531 | ||
532 | printf("\n Projectile Radius (fm): %f \n",fHijing->GetHIPR1(34)); | |
533 | printf("\n Target Radius (fm): %f \n",fHijing->GetHIPR1(35)); | |
534 | Int_t i; | |
21ce2e6f | 535 | Float_t oldvalue= 0.; |
536 | ||
537 | Float_t* b = new Float_t[kMax]; | |
538 | Float_t* si1 = new Float_t[kMax]; | |
539 | Float_t* si2 = new Float_t[kMax]; | |
110410f9 | 540 | |
21ce2e6f | 541 | for (i = 0; i < kMax; i++) |
110410f9 | 542 | { |
21ce2e6f | 543 | Float_t xb = bMin+i*kdib; |
110410f9 | 544 | Float_t ov; |
545 | ov=fHijing->Profile(xb); | |
21ce2e6f | 546 | Float_t gb = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fHijing->GetHINT1(12)*ov)); |
547 | Float_t gbh = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*sigmaHard*ov; | |
110410f9 | 548 | xTot+=gb; |
21ce2e6f | 549 | xTotHard += gbh; |
110410f9 | 550 | if (xb > fMinImpactParam && xb < fMaxImpactParam) |
551 | { | |
21ce2e6f | 552 | xPart += gb; |
553 | xPartHard += gbh; | |
110410f9 | 554 | } |
555 | ||
c007646a | 556 | if(oldvalue) if ((xTot-oldvalue)/oldvalue<0.0001) break; |
21ce2e6f | 557 | oldvalue = xTot; |
110410f9 | 558 | printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot); |
559 | printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard); | |
21ce2e6f | 560 | if (i>0) { |
561 | si1[i] = gb/kdib; | |
562 | si2[i] = gbh/gb; | |
563 | b[i] = xb; | |
564 | } | |
110410f9 | 565 | } |
21ce2e6f | 566 | |
110410f9 | 567 | printf("\n Total cross section (barn): %f \n",xTot); |
568 | printf("\n Hard cross section (barn): %f \n \n",xTotHard); | |
569 | printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.); | |
570 | printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.); | |
21ce2e6f | 571 | |
572 | // Store result as a graph | |
573 | b[0] = 0; | |
574 | si1[0] = 0; | |
575 | si2[0]=si2[1]; | |
576 | ||
577 | fDsigmaDb = new TGraph(i, b, si1); | |
578 | fDnDb = new TGraph(i, b, si2); | |
110410f9 | 579 | } |
580 | ||
7a013373 | 581 | Bool_t AliGenHijing::DaughtersSelection(TParticle* iparticle) |
110410f9 | 582 | { |
583 | // | |
584 | // Looks recursively if one of the daughters has been selected | |
585 | // | |
586 | // printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
21ce2e6f | 587 | Int_t imin = -1; |
588 | Int_t imax = -1; | |
110410f9 | 589 | Int_t i; |
21ce2e6f | 590 | Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0); |
591 | Bool_t selected = kFALSE; | |
110410f9 | 592 | if (hasDaughters) { |
21ce2e6f | 593 | imin = iparticle->GetFirstDaughter(); |
594 | imax = iparticle->GetLastDaughter(); | |
595 | for (i = imin; i <= imax; i++){ | |
7a013373 | 596 | TParticle * jparticle = (TParticle *) fParticles->At(i); |
21ce2e6f | 597 | Int_t ip = jparticle->GetPdgCode(); |
55d6adcf | 598 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { |
608708ba | 599 | selected=kTRUE; break; |
600 | } | |
7a013373 | 601 | if (DaughtersSelection(jparticle)) {selected=kTRUE; break; } |
110410f9 | 602 | } |
603 | } else { | |
604 | return kFALSE; | |
605 | } | |
110410f9 | 606 | return selected; |
607 | } | |
608 | ||
609 | ||
eb342d2d | 610 | Bool_t AliGenHijing::SelectFlavor(Int_t pid) |
611 | { | |
612 | // Select flavor of particle | |
613 | // 0: all | |
614 | // 4: charm and beauty | |
615 | // 5: beauty | |
0b22c984 | 616 | Bool_t res = 0; |
eb342d2d | 617 | |
cdd538f1 | 618 | if (fFlavor == 0) { |
619 | res = kTRUE; | |
620 | } else { | |
621 | Int_t ifl = TMath::Abs(pid/100); | |
622 | if (ifl > 10) ifl/=10; | |
623 | res = (fFlavor == ifl); | |
624 | } | |
625 | // | |
626 | // This part if gamma writing is inhibited | |
627 | if (fNoGammas) | |
628 | res = res && (pid != kGamma && pid != kPi0); | |
629 | // | |
0b22c984 | 630 | return res; |
608708ba | 631 | } |
eb342d2d | 632 | |
608708ba | 633 | Bool_t AliGenHijing::Stable(TParticle* particle) |
634 | { | |
675e9664 | 635 | // Return true for a stable particle |
636 | // | |
0b22c984 | 637 | |
79bf94df | 638 | if (particle->GetFirstDaughter() < 0 ) |
608708ba | 639 | { |
640 | return kTRUE; | |
641 | } else { | |
642 | return kFALSE; | |
643 | } | |
eb342d2d | 644 | } |
110410f9 | 645 | |
cc71f2d3 | 646 | |
7a013373 | 647 | void AliGenHijing::Boost() |
cc71f2d3 | 648 | { |
649 | // | |
650 | // Boost cms into LHC lab frame | |
651 | // | |
652 | Double_t dy = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) / | |
653 | (Double_t(fZTarget) * Double_t(fAProjectile))); | |
654 | Double_t beta = TMath::TanH(dy); | |
655 | Double_t gamma = 1./TMath::Sqrt(1.-beta*beta); | |
656 | Double_t gb = gamma * beta; | |
657 | ||
658 | printf("\n Boosting particles to lab frame %f %f %f", dy, beta, gamma); | |
659 | ||
660 | Int_t i; | |
7a013373 | 661 | Int_t np = fParticles->GetEntriesFast(); |
cc71f2d3 | 662 | for (i = 0; i < np; i++) |
663 | { | |
7a013373 | 664 | TParticle* iparticle = (TParticle*) fParticles->At(i); |
cc71f2d3 | 665 | |
666 | Double_t e = iparticle->Energy(); | |
667 | Double_t px = iparticle->Px(); | |
668 | Double_t py = iparticle->Py(); | |
669 | Double_t pz = iparticle->Pz(); | |
670 | ||
671 | Double_t eb = gamma * e - gb * pz; | |
672 | Double_t pzb = -gb * e + gamma * pz; | |
673 | ||
674 | iparticle->SetMomentum(px, py, pzb, eb); | |
675 | } | |
676 | } | |
677 | ||
678 | ||
3b8bd63f | 679 | void AliGenHijing::MakeHeader() |
680 | { | |
681 | // Builds the event header, to be called after each event | |
21ce2e6f | 682 | AliGenEventHeader* header = new AliGenHijingEventHeader("Hijing"); |
332c8db0 | 683 | ((AliGenHijingEventHeader*) header)->SetNProduced(fHijing->GetNATT()); |
684 | ((AliGenHijingEventHeader*) header)->SetImpactParameter(fHijing->GetHINT1(19)); | |
685 | ((AliGenHijingEventHeader*) header)->SetTotalEnergy(fHijing->GetEATT()); | |
686 | ((AliGenHijingEventHeader*) header)->SetHardScatters(fHijing->GetJATT()); | |
687 | ((AliGenHijingEventHeader*) header)->SetParticipants(fHijing->GetNP(), fHijing->GetNT()); | |
688 | ((AliGenHijingEventHeader*) header)->SetCollisions(fHijing->GetN0(), | |
689 | fHijing->GetN01(), | |
690 | fHijing->GetN10(), | |
691 | fHijing->GetN11()); | |
692 | ((AliGenHijingEventHeader*) header)->SetSpectators(fSpecn, fSpecp); | |
693 | ||
f8b85aa9 | 694 | // 4-momentum vectors of the triggered jets. |
695 | // | |
696 | // Before final state gluon radiation. | |
332c8db0 | 697 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(21), |
698 | fHijing->GetHINT1(22), | |
699 | fHijing->GetHINT1(23), | |
700 | fHijing->GetHINT1(24)); | |
701 | ||
702 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(31), | |
703 | fHijing->GetHINT1(32), | |
704 | fHijing->GetHINT1(33), | |
705 | fHijing->GetHINT1(34)); | |
f8b85aa9 | 706 | // After final state gluon radiation. |
707 | TLorentzVector* jet3 = new TLorentzVector(fHijing->GetHINT1(26), | |
708 | fHijing->GetHINT1(27), | |
709 | fHijing->GetHINT1(28), | |
710 | fHijing->GetHINT1(29)); | |
711 | ||
712 | TLorentzVector* jet4 = new TLorentzVector(fHijing->GetHINT1(36), | |
713 | fHijing->GetHINT1(37), | |
714 | fHijing->GetHINT1(38), | |
715 | fHijing->GetHINT1(39)); | |
716 | ((AliGenHijingEventHeader*) header)->SetJets(jet1, jet2, jet3, jet4); | |
7a186781 | 717 | // Bookkeeping for kinematic bias |
e4ffda63 | 718 | ((AliGenHijingEventHeader*) header)->SetTrials(fTrials); |
f8b85aa9 | 719 | // Event Vertex |
720 | header->SetPrimaryVertex(fEventVertex); | |
96a7d299 | 721 | gAlice->SetGenEventHeader(header); |
722 | fCollisionGeometry = (AliGenHijingEventHeader*) header; | |
3b8bd63f | 723 | } |
724 | ||
e4ffda63 | 725 | Bool_t AliGenHijing::CheckTrigger() |
726 | { | |
727 | // Check the kinematic trigger condition | |
7a013373 | 728 | // |
e4ffda63 | 729 | Bool_t triggered = kFALSE; |
7a013373 | 730 | |
731 | if (fTrigger == 1) { | |
732 | // | |
733 | // jet-jet Trigger | |
734 | ||
735 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(26), | |
736 | fHijing->GetHINT1(27), | |
737 | fHijing->GetHINT1(28), | |
738 | fHijing->GetHINT1(29)); | |
739 | ||
740 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(36), | |
741 | fHijing->GetHINT1(37), | |
742 | fHijing->GetHINT1(38), | |
743 | fHijing->GetHINT1(39)); | |
744 | Double_t eta1 = jet1->Eta(); | |
745 | Double_t eta2 = jet2->Eta(); | |
746 | Double_t phi1 = jet1->Phi(); | |
747 | Double_t phi2 = jet2->Phi(); | |
9bf3f17b | 748 | // printf("\n Trigger: %f %f %f %f", |
749 | // fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet); | |
7a013373 | 750 | if ( |
751 | (eta1 < fEtaMaxJet && eta1 > fEtaMinJet && | |
752 | phi1 < fPhiMaxJet && phi1 > fPhiMinJet) | |
753 | || | |
754 | (eta2 < fEtaMaxJet && eta2 > fEtaMinJet && | |
755 | phi2 < fPhiMaxJet && phi2 > fPhiMinJet) | |
756 | ) | |
757 | triggered = kTRUE; | |
758 | } else if (fTrigger == 2) { | |
759 | // Gamma Jet | |
760 | // | |
761 | Int_t np = fParticles->GetEntriesFast(); | |
762 | for (Int_t i = 0; i < np; i++) { | |
763 | TParticle* part = (TParticle*) fParticles->At(i); | |
764 | Int_t kf = part->GetPdgCode(); | |
765 | Int_t ks = part->GetStatusCode(); | |
766 | if (kf == 22 && ks == 40) { | |
767 | Float_t phi = part->Phi(); | |
768 | Float_t eta = part->Eta(); | |
769 | if (eta < fEtaMaxJet && | |
770 | eta > fEtaMinJet && | |
771 | phi < fPhiMaxJet && | |
772 | phi > fPhiMinJet) { | |
773 | triggered = 1; | |
774 | break; | |
775 | } // check phi,eta within limits | |
776 | } // direct gamma ? | |
777 | } // particle loop | |
778 | } // fTrigger == 2 | |
e4ffda63 | 779 | return triggered; |
780 | } | |
cc71f2d3 | 781 | |
3792091f | 782 | |
783 | ||
784 | ||
110410f9 | 785 | AliGenHijing& AliGenHijing::operator=(const AliGenHijing& rhs) |
786 | { | |
787 | // Assignment operator | |
788 | return *this; | |
789 | } | |
608708ba | 790 | |
65fb704d | 791 | #ifndef WIN32 |
792 | # define rluget_hijing rluget_hijing_ | |
793 | # define rluset_hijing rluset_hijing_ | |
794 | # define rlu_hijing rlu_hijing_ | |
795 | # define type_of_call | |
796 | #else | |
797 | # define rluget_hijing RLUGET_HIJING | |
798 | # define rluset_hijing RLUSET_HIJING | |
799 | # define rlu_hijing RLU_HIJING | |
800 | # define type_of_call _stdcall | |
801 | #endif | |
802 | ||
803 | ||
804 | extern "C" { | |
805 | void type_of_call rluget_hijing(Int_t & /*lfn*/, Int_t & /*move*/) | |
806 | {printf("Dummy version of rluget_hijing reached\n");} | |
807 | ||
808 | void type_of_call rluset_hijing(Int_t & /*lfn*/, Int_t & /*move*/) | |
809 | {printf("Dummy version of rluset_hijing reached\n");} | |
810 | ||
811 | Double_t type_of_call rlu_hijing(Int_t & /*idum*/) | |
7498b3ad | 812 | { |
813 | Float_t r; | |
814 | do r=sRandom->Rndm(); while(0 >= r || r >= 1); | |
815 | return r; | |
816 | } | |
65fb704d | 817 | } |