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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 | /* $Id$ */ | |
17 | ||
18 | #include "AliPythia.h" | |
19 | #include "AliPythiaRndm.h" | |
20 | #include "../FASTSIM/AliFastGlauber.h" | |
21 | #include "../FASTSIM/AliQuenchingWeights.h" | |
22 | #include "TVector3.h" | |
23 | ||
24 | ClassImp(AliPythia) | |
25 | ||
26 | #ifndef WIN32 | |
27 | # define pyclus pyclus_ | |
28 | # define pycell pycell_ | |
29 | # define pyshow pyshow_ | |
30 | # define pyrobo pyrobo_ | |
31 | # define type_of_call | |
32 | #else | |
33 | # define pyclus PYCLUS | |
34 | # define pycell PYCELL | |
35 | # define pyrobo PYROBO | |
36 | # define type_of_call _stdcall | |
37 | #endif | |
38 | ||
39 | extern "C" void type_of_call pyclus(Int_t & ); | |
40 | extern "C" void type_of_call pycell(Int_t & ); | |
41 | extern "C" void type_of_call pyshow(Int_t &, Int_t &, Double_t &); | |
42 | extern "C" void type_of_call pyrobo(Int_t &, Int_t &, Double_t &, Double_t &, Double_t &, Double_t &, Double_t &); | |
43 | ||
44 | //_____________________________________________________________________________ | |
45 | ||
46 | AliPythia* AliPythia::fgAliPythia=NULL; | |
47 | ||
48 | AliPythia::AliPythia() | |
49 | { | |
50 | // Default Constructor | |
51 | // | |
52 | // Set random number | |
53 | if (!AliPythiaRndm::GetPythiaRandom()) | |
54 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
55 | fGlauber = 0; | |
56 | fQuenchingWeights = 0; | |
57 | } | |
58 | ||
59 | void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc) | |
60 | { | |
61 | // Initialise the process to generate | |
62 | if (!AliPythiaRndm::GetPythiaRandom()) | |
63 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
64 | ||
65 | fProcess = process; | |
66 | fEcms = energy; | |
67 | fStrucFunc = strucfunc; | |
68 | // don't decay p0 | |
69 | SetMDCY(Pycomp(111),1,0); | |
70 | // select structure function | |
71 | SetMSTP(52,2); | |
72 | SetMSTP(51,strucfunc); | |
73 | // | |
74 | // Pythia initialisation for selected processes// | |
75 | // | |
76 | // Make MSEL clean | |
77 | // | |
78 | for (Int_t i=1; i<= 200; i++) { | |
79 | SetMSUB(i,0); | |
80 | } | |
81 | // select charm production | |
82 | switch (process) | |
83 | { | |
84 | case kPyCharm: | |
85 | SetMSEL(4); | |
86 | // | |
87 | // heavy quark masses | |
88 | ||
89 | SetPMAS(4,1,1.2); | |
90 | SetMSTU(16,2); | |
91 | // | |
92 | // primordial pT | |
93 | SetMSTP(91,1); | |
94 | SetPARP(91,1.); | |
95 | SetPARP(93,5.); | |
96 | // | |
97 | break; | |
98 | case kPyBeauty: | |
99 | SetMSEL(5); | |
100 | SetPMAS(5,1,4.75); | |
101 | SetMSTU(16,2); | |
102 | break; | |
103 | case kPyJpsi: | |
104 | SetMSEL(0); | |
105 | // gg->J/Psi g | |
106 | SetMSUB(86,1); | |
107 | break; | |
108 | case kPyJpsiChi: | |
109 | SetMSEL(0); | |
110 | // gg->J/Psi g | |
111 | SetMSUB(86,1); | |
112 | // gg-> chi_0c g | |
113 | SetMSUB(87,1); | |
114 | // gg-> chi_1c g | |
115 | SetMSUB(88,1); | |
116 | // gg-> chi_2c g | |
117 | SetMSUB(89,1); | |
118 | break; | |
119 | case kPyCharmUnforced: | |
120 | SetMSEL(0); | |
121 | // gq->qg | |
122 | SetMSUB(28,1); | |
123 | // gg->qq | |
124 | SetMSUB(53,1); | |
125 | // gg->gg | |
126 | SetMSUB(68,1); | |
127 | break; | |
128 | case kPyBeautyUnforced: | |
129 | SetMSEL(0); | |
130 | // gq->qg | |
131 | SetMSUB(28,1); | |
132 | // gg->qq | |
133 | SetMSUB(53,1); | |
134 | // gg->gg | |
135 | SetMSUB(68,1); | |
136 | break; | |
137 | case kPyMb: | |
138 | // Minimum Bias pp-Collisions | |
139 | // | |
140 | // | |
141 | // select Pythia min. bias model | |
142 | SetMSEL(0); | |
143 | SetMSUB(92,1); // single diffraction AB-->XB | |
144 | SetMSUB(93,1); // single diffraction AB-->AX | |
145 | SetMSUB(94,1); // double diffraction | |
146 | SetMSUB(95,1); // low pt production | |
147 | ||
148 | // | |
149 | // ATLAS Tuning | |
150 | // | |
151 | ||
152 | SetMSTP(51, kCTEQ5L); // CTEQ5L pdf | |
153 | SetMSTP(81,1); // Multiple Interactions ON | |
154 | SetMSTP(82,4); // Double Gaussian Model | |
155 | ||
156 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy | |
157 | SetPARP(89,1000.); // [GeV] Ref. energy | |
158 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) | |
159 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
160 | SetPARP(84,0.5); // Core radius | |
161 | SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
162 | SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
163 | SetPARP(67,1); // Regulates Initial State Radiation | |
164 | break; | |
165 | case kPyMbNonDiffr: | |
166 | // Minimum Bias pp-Collisions | |
167 | // | |
168 | // | |
169 | // select Pythia min. bias model | |
170 | SetMSEL(0); | |
171 | SetMSUB(95,1); // low pt production | |
172 | ||
173 | // | |
174 | // ATLAS Tuning | |
175 | // | |
176 | ||
177 | SetMSTP(51,7); // CTEQ5L pdf | |
178 | SetMSTP(81,1); // Multiple Interactions ON | |
179 | SetMSTP(82,4); // Double Gaussian Model | |
180 | ||
181 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy | |
182 | SetPARP(89,1000.); // [GeV] Ref. energy | |
183 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) | |
184 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
185 | SetPARP(84,0.5); // Core radius | |
186 | SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
187 | SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
188 | SetPARP(67,1); // Regulates Initial State Radiation | |
189 | break; | |
190 | case kPyJets: | |
191 | // | |
192 | // QCD Jets | |
193 | // | |
194 | SetMSEL(1); | |
195 | break; | |
196 | case kPyDirectGamma: | |
197 | SetMSEL(10); | |
198 | break; | |
199 | case kPyCharmPbPbMNR: | |
200 | case kPyD0PbPbMNR: | |
201 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
202 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
203 | // c-cbar single inclusive and double differential distributions. | |
204 | // This parameter settings are meant to work with Pb-Pb collisions | |
205 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
206 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
207 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
208 | ||
209 | // All QCD processes | |
210 | SetMSEL(1); | |
211 | ||
212 | // No multiple interactions | |
213 | SetMSTP(81,0); | |
214 | SetPARP(81,0.0); | |
215 | SetPARP(82,0.0); | |
216 | ||
217 | // Initial/final parton shower on (Pythia default) | |
218 | SetMSTP(61,1); | |
219 | SetMSTP(71,1); | |
220 | ||
221 | // 2nd order alpha_s | |
222 | SetMSTP(2,2); | |
223 | ||
224 | // QCD scales | |
225 | SetMSTP(32,2); | |
226 | SetPARP(34,1.0); | |
227 | ||
228 | // Intrinsic <kT> | |
229 | SetMSTP(91,1); | |
230 | SetPARP(91,1.304); | |
231 | SetPARP(93,6.52); | |
232 | ||
233 | // Set c-quark mass | |
234 | SetPMAS(4,1,1.2); | |
235 | ||
236 | break; | |
237 | case kPyDPlusPbPbMNR: | |
238 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
239 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
240 | // c-cbar single inclusive and double differential distributions. | |
241 | // This parameter settings are meant to work with Pb-Pb collisions | |
242 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
243 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
244 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
245 | ||
246 | // All QCD processes | |
247 | SetMSEL(1); | |
248 | ||
249 | // No multiple interactions | |
250 | SetMSTP(81,0); | |
251 | SetPARP(81,0.0); | |
252 | SetPARP(82,0.0); | |
253 | ||
254 | // Initial/final parton shower on (Pythia default) | |
255 | SetMSTP(61,1); | |
256 | SetMSTP(71,1); | |
257 | ||
258 | // 2nd order alpha_s | |
259 | SetMSTP(2,2); | |
260 | ||
261 | // QCD scales | |
262 | SetMSTP(32,2); | |
263 | SetPARP(34,1.0); | |
264 | ||
265 | // Intrinsic <kT> | |
266 | SetMSTP(91,1); | |
267 | SetPARP(91,1.304); | |
268 | SetPARP(93,6.52); | |
269 | ||
270 | // Set c-quark mass | |
271 | SetPMAS(4,1,1.2); | |
272 | ||
273 | break; | |
274 | case kPyCharmpPbMNR: | |
275 | case kPyD0pPbMNR: | |
276 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
277 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
278 | // c-cbar single inclusive and double differential distributions. | |
279 | // This parameter settings are meant to work with p-Pb collisions | |
280 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
281 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
282 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
283 | ||
284 | // All QCD processes | |
285 | SetMSEL(1); | |
286 | ||
287 | // No multiple interactions | |
288 | SetMSTP(81,0); | |
289 | SetPARP(81,0.0); | |
290 | SetPARP(82,0.0); | |
291 | ||
292 | // Initial/final parton shower on (Pythia default) | |
293 | SetMSTP(61,1); | |
294 | SetMSTP(71,1); | |
295 | ||
296 | // 2nd order alpha_s | |
297 | SetMSTP(2,2); | |
298 | ||
299 | // QCD scales | |
300 | SetMSTP(32,2); | |
301 | SetPARP(34,1.0); | |
302 | ||
303 | // Intrinsic <kT> | |
304 | SetMSTP(91,1); | |
305 | SetPARP(91,1.16); | |
306 | SetPARP(93,5.8); | |
307 | ||
308 | // Set c-quark mass | |
309 | SetPMAS(4,1,1.2); | |
310 | ||
311 | break; | |
312 | case kPyDPluspPbMNR: | |
313 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
314 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
315 | // c-cbar single inclusive and double differential distributions. | |
316 | // This parameter settings are meant to work with p-Pb collisions | |
317 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
318 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
319 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
320 | ||
321 | // All QCD processes | |
322 | SetMSEL(1); | |
323 | ||
324 | // No multiple interactions | |
325 | SetMSTP(81,0); | |
326 | SetPARP(81,0.0); | |
327 | SetPARP(82,0.0); | |
328 | ||
329 | // Initial/final parton shower on (Pythia default) | |
330 | SetMSTP(61,1); | |
331 | SetMSTP(71,1); | |
332 | ||
333 | // 2nd order alpha_s | |
334 | SetMSTP(2,2); | |
335 | ||
336 | // QCD scales | |
337 | SetMSTP(32,2); | |
338 | SetPARP(34,1.0); | |
339 | ||
340 | // Intrinsic <kT> | |
341 | SetMSTP(91,1); | |
342 | SetPARP(91,1.16); | |
343 | SetPARP(93,5.8); | |
344 | ||
345 | // Set c-quark mass | |
346 | SetPMAS(4,1,1.2); | |
347 | ||
348 | break; | |
349 | case kPyCharmppMNR: | |
350 | case kPyD0ppMNR: | |
351 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
352 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
353 | // c-cbar single inclusive and double differential distributions. | |
354 | // This parameter settings are meant to work with pp collisions | |
355 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
356 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
357 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
358 | ||
359 | // All QCD processes | |
360 | SetMSEL(1); | |
361 | ||
362 | // No multiple interactions | |
363 | SetMSTP(81,0); | |
364 | SetPARP(81,0.0); | |
365 | SetPARP(82,0.0); | |
366 | ||
367 | // Initial/final parton shower on (Pythia default) | |
368 | SetMSTP(61,1); | |
369 | SetMSTP(71,1); | |
370 | ||
371 | // 2nd order alpha_s | |
372 | SetMSTP(2,2); | |
373 | ||
374 | // QCD scales | |
375 | SetMSTP(32,2); | |
376 | SetPARP(34,1.0); | |
377 | ||
378 | // Intrinsic <kT^2> | |
379 | SetMSTP(91,1); | |
380 | SetPARP(91,1.); | |
381 | SetPARP(93,5.); | |
382 | ||
383 | // Set c-quark mass | |
384 | SetPMAS(4,1,1.2); | |
385 | ||
386 | break; | |
387 | case kPyDPlusppMNR: | |
388 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
389 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
390 | // c-cbar single inclusive and double differential distributions. | |
391 | // This parameter settings are meant to work with pp collisions | |
392 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
393 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
394 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
395 | ||
396 | // All QCD processes | |
397 | SetMSEL(1); | |
398 | ||
399 | // No multiple interactions | |
400 | SetMSTP(81,0); | |
401 | SetPARP(81,0.0); | |
402 | SetPARP(82,0.0); | |
403 | ||
404 | // Initial/final parton shower on (Pythia default) | |
405 | SetMSTP(61,1); | |
406 | SetMSTP(71,1); | |
407 | ||
408 | // 2nd order alpha_s | |
409 | SetMSTP(2,2); | |
410 | ||
411 | // QCD scales | |
412 | SetMSTP(32,2); | |
413 | SetPARP(34,1.0); | |
414 | ||
415 | // Intrinsic <kT^2> | |
416 | SetMSTP(91,1); | |
417 | SetPARP(91,1.); | |
418 | SetPARP(93,5.); | |
419 | ||
420 | // Set c-quark mass | |
421 | SetPMAS(4,1,1.2); | |
422 | ||
423 | break; | |
424 | case kPyBeautyPbPbMNR: | |
425 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
426 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
427 | // b-bbar single inclusive and double differential distributions. | |
428 | // This parameter settings are meant to work with Pb-Pb collisions | |
429 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
430 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
431 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
432 | ||
433 | // All QCD processes | |
434 | SetMSEL(1); | |
435 | ||
436 | // No multiple interactions | |
437 | SetMSTP(81,0); | |
438 | SetPARP(81,0.0); | |
439 | SetPARP(82,0.0); | |
440 | ||
441 | // Initial/final parton shower on (Pythia default) | |
442 | SetMSTP(61,1); | |
443 | SetMSTP(71,1); | |
444 | ||
445 | // 2nd order alpha_s | |
446 | SetMSTP(2,2); | |
447 | ||
448 | // QCD scales | |
449 | SetMSTP(32,2); | |
450 | SetPARP(34,1.0); | |
451 | SetPARP(67,1.0); | |
452 | SetPARP(71,1.0); | |
453 | ||
454 | // Intrinsic <kT> | |
455 | SetMSTP(91,1); | |
456 | SetPARP(91,2.035); | |
457 | SetPARP(93,10.17); | |
458 | ||
459 | // Set b-quark mass | |
460 | SetPMAS(5,1,4.75); | |
461 | ||
462 | break; | |
463 | case kPyBeautypPbMNR: | |
464 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
465 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
466 | // b-bbar single inclusive and double differential distributions. | |
467 | // This parameter settings are meant to work with p-Pb collisions | |
468 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
469 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
470 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
471 | ||
472 | // All QCD processes | |
473 | SetMSEL(1); | |
474 | ||
475 | // No multiple interactions | |
476 | SetMSTP(81,0); | |
477 | SetPARP(81,0.0); | |
478 | SetPARP(82,0.0); | |
479 | ||
480 | // Initial/final parton shower on (Pythia default) | |
481 | SetMSTP(61,1); | |
482 | SetMSTP(71,1); | |
483 | ||
484 | // 2nd order alpha_s | |
485 | SetMSTP(2,2); | |
486 | ||
487 | // QCD scales | |
488 | SetMSTP(32,2); | |
489 | SetPARP(34,1.0); | |
490 | SetPARP(67,1.0); | |
491 | SetPARP(71,1.0); | |
492 | ||
493 | // Intrinsic <kT> | |
494 | SetMSTP(91,1); | |
495 | SetPARP(91,1.60); | |
496 | SetPARP(93,8.00); | |
497 | ||
498 | // Set b-quark mass | |
499 | SetPMAS(5,1,4.75); | |
500 | ||
501 | break; | |
502 | case kPyBeautyppMNR: | |
503 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
504 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
505 | // b-bbar single inclusive and double differential distributions. | |
506 | // This parameter settings are meant to work with pp collisions | |
507 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
508 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
509 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
510 | ||
511 | // All QCD processes | |
512 | SetMSEL(1); | |
513 | ||
514 | // No multiple interactions | |
515 | SetMSTP(81,0); | |
516 | SetPARP(81,0.0); | |
517 | SetPARP(82,0.0); | |
518 | ||
519 | // Initial/final parton shower on (Pythia default) | |
520 | SetMSTP(61,1); | |
521 | SetMSTP(71,1); | |
522 | ||
523 | // 2nd order alpha_s | |
524 | SetMSTP(2,2); | |
525 | ||
526 | // QCD scales | |
527 | SetMSTP(32,2); | |
528 | SetPARP(34,1.0); | |
529 | SetPARP(67,1.0); | |
530 | SetPARP(71,1.0); | |
531 | ||
532 | // Intrinsic <kT> | |
533 | SetMSTP(91,1); | |
534 | SetPARP(91,1.); | |
535 | SetPARP(93,5.); | |
536 | ||
537 | // Set b-quark mass | |
538 | SetPMAS(5,1,4.75); | |
539 | ||
540 | break; | |
541 | } | |
542 | // | |
543 | // Initialize PYTHIA | |
544 | SetMSTP(41,1); // all resonance decays switched on | |
545 | ||
546 | Initialize("CMS","p","p",fEcms); | |
547 | ||
548 | } | |
549 | ||
550 | Int_t AliPythia::CheckedLuComp(Int_t kf) | |
551 | { | |
552 | // Check Lund particle code (for debugging) | |
553 | Int_t kc=Pycomp(kf); | |
554 | printf("\n Lucomp kf,kc %d %d",kf,kc); | |
555 | return kc; | |
556 | } | |
557 | ||
558 | void AliPythia::SetNuclei(Int_t a1, Int_t a2) | |
559 | { | |
560 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
561 | // The MSTP array in the PYPARS common block is used to enable and | |
562 | // select the nuclear structure functions. | |
563 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
564 | // =1: internal PYTHIA acording to MSTP(51) | |
565 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
566 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
567 | // MSTP(192) : Mass number of nucleus side 1 | |
568 | // MSTP(193) : Mass number of nucleus side 2 | |
569 | SetMSTP(52,2); | |
570 | SetMSTP(192, a1); | |
571 | SetMSTP(193, a2); | |
572 | } | |
573 | ||
574 | ||
575 | AliPythia* AliPythia::Instance() | |
576 | { | |
577 | // Set random number generator | |
578 | if (fgAliPythia) { | |
579 | return fgAliPythia; | |
580 | } else { | |
581 | fgAliPythia = new AliPythia(); | |
582 | return fgAliPythia; | |
583 | } | |
584 | } | |
585 | ||
586 | void AliPythia::PrintParticles() | |
587 | { | |
588 | // Print list of particl properties | |
589 | Int_t np = 0; | |
590 | char* name = new char[16]; | |
591 | for (Int_t kf=0; kf<1000000; kf++) { | |
592 | for (Int_t c = 1; c > -2; c-=2) { | |
593 | Int_t kc = Pycomp(c*kf); | |
594 | if (kc) { | |
595 | Float_t mass = GetPMAS(kc,1); | |
596 | Float_t width = GetPMAS(kc,2); | |
597 | Float_t tau = GetPMAS(kc,4); | |
598 | ||
599 | Pyname(kf,name); | |
600 | ||
601 | np++; | |
602 | ||
603 | printf("\n mass, width, tau: %6d %s %10.3f %10.3e %10.3e", | |
604 | c*kf, name, mass, width, tau); | |
605 | } | |
606 | } | |
607 | } | |
608 | printf("\n Number of particles %d \n \n", np); | |
609 | } | |
610 | ||
611 | void AliPythia::ResetDecayTable() | |
612 | { | |
613 | // Set default values for pythia decay switches | |
614 | Int_t i; | |
615 | for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
616 | for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
617 | } | |
618 | ||
619 | void AliPythia::SetDecayTable() | |
620 | { | |
621 | // Set default values for pythia decay switches | |
622 | // | |
623 | Int_t i; | |
624 | for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
625 | for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
626 | } | |
627 | ||
628 | void AliPythia::Pyclus(Int_t& njet) | |
629 | { | |
630 | // Call Pythia clustering algorithm | |
631 | // | |
632 | pyclus(njet); | |
633 | } | |
634 | ||
635 | void AliPythia::Pycell(Int_t& njet) | |
636 | { | |
637 | // Call Pythia jet reconstruction algorithm | |
638 | // | |
639 | pycell(njet); | |
640 | } | |
641 | ||
642 | void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax) | |
643 | { | |
644 | // Call Pythia jet reconstruction algorithm | |
645 | // | |
646 | pyshow(ip1, ip2, qmax); | |
647 | } | |
648 | ||
649 | void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez) | |
650 | { | |
651 | pyrobo(imi, ima, the, phi, bex, bey, bez); | |
652 | } | |
653 | ||
654 | ||
655 | ||
656 | void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod) | |
657 | { | |
658 | // Initializes | |
659 | // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann | |
660 | // (2) The nuclear geometry using the Glauber Model | |
661 | // | |
662 | ||
663 | ||
664 | fGlauber = new AliFastGlauber(); | |
665 | fGlauber->Init(2); | |
666 | fGlauber->SetCentralityClass(cMin, cMax); | |
667 | ||
668 | fQuenchingWeights = new AliQuenchingWeights(); | |
669 | fQuenchingWeights->InitMult(); | |
670 | fQuenchingWeights->SetK(k); | |
671 | fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod)); | |
672 | } | |
673 | ||
674 | ||
675 | void AliPythia::Quench() | |
676 | { | |
677 | // | |
678 | // | |
679 | // Simple Jet Quenching routine: | |
680 | // ============================= | |
681 | // The jet formed by all final state partons radiated by the parton created | |
682 | // in the hard collisions is quenched by a factor (1-z) using light cone variables in | |
683 | // the initial parton reference frame: | |
684 | // (E + p_z)new = (1-z) (E + p_z)old | |
685 | // | |
686 | // | |
687 | // | |
688 | // | |
689 | // The lost momentum is first balanced by one gluon with virtuality > 0. | |
690 | // Subsequently the gluon splits to yield two gluons with E = p. | |
691 | // | |
692 | // | |
693 | // | |
694 | static Float_t eMean = 0.; | |
695 | static Int_t icall = 0; | |
696 | ||
697 | Double_t p0[4][5]; | |
698 | Double_t p1[4][5]; | |
699 | Double_t p2[4][5]; | |
700 | Int_t klast[4] = {-1, -1, -1, -1}; | |
701 | ||
702 | Int_t numpart = fPyjets->N; | |
703 | Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0., phi = 0.; | |
704 | Double_t pxq[4], pyq[4], pzq[4], eq[4], yq[4], mq[4], pq[4], phiq[4], thetaq[4], ptq[4]; | |
705 | Bool_t quenched[4]; | |
706 | Double_t zInitial[4], wjtKick[4]; | |
707 | Int_t nGluon[4]; | |
708 | Int_t qPdg[4]; | |
709 | Int_t imo, kst, pdg; | |
710 | // | |
711 | // Sore information about Primary partons | |
712 | // | |
713 | // j = | |
714 | // 0, 1 partons from hard scattering | |
715 | // 2, 3 partons from initial state radiation | |
716 | // | |
717 | for (Int_t i = 2; i <= 7; i++) { | |
718 | Int_t j = 0; | |
719 | // Skip gluons that participate in hard scattering | |
720 | if (i == 4 || i == 5) continue; | |
721 | // Gluons from hard Scattering | |
722 | if (i == 6 || i == 7) { | |
723 | j = i - 6; | |
724 | pxq[j] = fPyjets->P[0][i]; | |
725 | pyq[j] = fPyjets->P[1][i]; | |
726 | pzq[j] = fPyjets->P[2][i]; | |
727 | eq[j] = fPyjets->P[3][i]; | |
728 | mq[j] = fPyjets->P[4][i]; | |
729 | } else { | |
730 | // Gluons from initial state radiation | |
731 | // | |
732 | // Obtain 4-momentum vector from difference between original parton and parton after gluon | |
733 | // radiation. Energy is calculated independently because initial state radition does not | |
734 | // conserve strictly momentum and energy for each partonic system independently. | |
735 | // | |
736 | // Not very clean. Should be improved ! | |
737 | // | |
738 | // | |
739 | j = i; | |
740 | pxq[j] = fPyjets->P[0][i] - fPyjets->P[0][i+2]; | |
741 | pyq[j] = fPyjets->P[1][i] - fPyjets->P[1][i+2]; | |
742 | pzq[j] = fPyjets->P[2][i] - fPyjets->P[2][i+2]; | |
743 | mq[j] = fPyjets->P[4][i]; | |
744 | eq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j] + mq[j] * mq[j]); | |
745 | } | |
746 | // | |
747 | // Calculate some kinematic variables | |
748 | // | |
749 | yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14)); | |
750 | pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]); | |
751 | phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]); | |
752 | ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]); | |
753 | thetaq[j] = TMath::ATan2(ptq[j], pzq[j]); | |
754 | qPdg[j] = fPyjets->K[1][i]; | |
755 | } | |
756 | ||
757 | Double_t int0[4]; | |
758 | Double_t int1[4]; | |
759 | ||
760 | fGlauber->GetI0I1ForPythia(4, phiq, int0, int1, 15.); | |
761 | ||
762 | for (Int_t j = 0; j < 4; j++) { | |
763 | // | |
764 | // Quench only central jets and with E > 10. | |
765 | // | |
766 | ||
767 | ||
768 | Int_t itype = (qPdg[j] == 21) ? 2 : 1; | |
769 | Double_t eloss = fQuenchingWeights->GetELossRandomKFast(itype, int0[j], int1[j], eq[j]); | |
770 | ||
771 | if (TMath::Abs(yq[j]) > 2.5 || eq[j] < 10.) { | |
772 | zInitial[j] = 0.; | |
773 | } else { | |
774 | if (eq[j] > 40. && TMath::Abs(yq[j]) < 0.5) { | |
775 | icall ++; | |
776 | eMean += eloss; | |
777 | } | |
778 | // | |
779 | // Extra pt | |
780 | Double_t l = fQuenchingWeights->CalcLk(int0[j], int1[j]); | |
781 | wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->CalcQk(int0[j], int1[j])); | |
782 | // | |
783 | // Fractional energy loss | |
784 | zInitial[j] = eloss / eq[j]; | |
785 | // | |
786 | // Avoid complete loss | |
787 | // | |
788 | if (zInitial[j] == 1.) zInitial[j] = 0.95; | |
789 | // | |
790 | // Some debug printing | |
791 | ||
792 | ||
793 | // printf("Initial parton # %3d, Type %3d Energy %10.3f Phi %10.3f Length %10.3f Loss %10.3f Kick %10.3f Mean: %10.3f %10.3f\n", | |
794 | // j, itype, eq[j], phiq[j], l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]); | |
795 | ||
796 | // zInitial[j] = 0.8; | |
797 | // while (zInitial[j] >= 0.95) zInitial[j] = gRandom->Exp(0.2); | |
798 | } | |
799 | ||
800 | quenched[j] = (zInitial[j] > 0.01); | |
801 | } // primary partons | |
802 | ||
803 | Double_t pNew[1000][4]; | |
804 | Int_t kNew[1000]; | |
805 | Int_t icount = 0; | |
806 | // | |
807 | // System Loop | |
808 | for (Int_t isys = 0; isys < 4; isys++) { | |
809 | // Skip to next system if not quenched. | |
810 | if (!quenched[isys]) continue; | |
811 | ||
812 | nGluon[isys] = 1 + Int_t(zInitial[isys] / (1. - zInitial[isys])); | |
813 | if (nGluon[isys] > 6) nGluon[isys] = 6; | |
814 | zInitial[isys] = 1. - TMath::Power(1. - zInitial[isys], 1./Double_t(nGluon[isys])); | |
815 | wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys])); | |
816 | ||
817 | ||
818 | ||
819 | Int_t igMin = -1; | |
820 | Int_t igMax = -1; | |
821 | Double_t pg[4] = {0., 0., 0., 0.}; | |
822 | ||
823 | // | |
824 | // Loop on radiation events | |
825 | ||
826 | for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) { | |
827 | while (1) { | |
828 | icount = 0; | |
829 | for (Int_t k = 0; k < 4; k++) | |
830 | { | |
831 | p0[isys][k] = 0.; | |
832 | p1[isys][k] = 0.; | |
833 | p2[isys][k] = 0.; | |
834 | } | |
835 | // Loop over partons | |
836 | for (Int_t i = 0; i < numpart; i++) | |
837 | { | |
838 | imo = fPyjets->K[2][i]; | |
839 | kst = fPyjets->K[0][i]; | |
840 | pdg = fPyjets->K[1][i]; | |
841 | ||
842 | ||
843 | ||
844 | // Quarks and gluons only | |
845 | if (pdg != 21 && TMath::Abs(pdg) > 6) continue; | |
846 | // Particles from hard scattering only | |
847 | ||
848 | if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1]; | |
849 | Int_t imom = imo % 1000; | |
850 | if ((isys == 0 || isys == 1) && ((imom != (isys + 7)))) continue; | |
851 | if ((isys == 2 || isys == 3) && ((imom != (isys + 1)))) continue; | |
852 | ||
853 | ||
854 | // Skip comment lines | |
855 | if (kst != 1 && kst != 2) continue; | |
856 | // | |
857 | // Parton kinematic | |
858 | px = fPyjets->P[0][i]; | |
859 | py = fPyjets->P[1][i]; | |
860 | pz = fPyjets->P[2][i]; | |
861 | e = fPyjets->P[3][i]; | |
862 | m = fPyjets->P[4][i]; | |
863 | pt = TMath::Sqrt(px * px + py * py); | |
864 | p = TMath::Sqrt(px * px + py * py + pz * pz); | |
865 | phi = TMath::Pi() + TMath::ATan2(-py, -px); | |
866 | theta = TMath::ATan2(pt, pz); | |
867 | ||
868 | // | |
869 | // Save 4-momentum sum for balancing | |
870 | Int_t index = isys; | |
871 | ||
872 | p0[index][0] += px; | |
873 | p0[index][1] += py; | |
874 | p0[index][2] += pz; | |
875 | p0[index][3] += e; | |
876 | ||
877 | klast[index] = i; | |
878 | ||
879 | // | |
880 | // Fractional energy loss | |
881 | Double_t z = zInitial[index]; | |
882 | ||
883 | ||
884 | // Don't fully quench radiated gluons | |
885 | // | |
886 | if (imo > 1000) { | |
887 | // This small factor makes sure that the gluons are not too close in phase space to avoid recombination | |
888 | // | |
889 | ||
890 | z = 0.02; | |
891 | } | |
892 | // printf("z: %d %f\n", imo, z); | |
893 | ||
894 | ||
895 | // | |
896 | ||
897 | // | |
898 | // | |
899 | // Transform into frame in which initial parton is along z-axis | |
900 | // | |
901 | TVector3 v(px, py, pz); | |
902 | v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]); | |
903 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z(); | |
904 | ||
905 | Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys); | |
906 | Double_t mt2 = jt * jt + m * m; | |
907 | Double_t zmax = 1.; | |
908 | // | |
909 | // Kinematic limit on z | |
910 | // | |
911 | if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt); | |
912 | // | |
913 | // Change light-cone kinematics rel. to initial parton | |
914 | // | |
915 | Double_t eppzOld = e + pl; | |
916 | Double_t empzOld = e - pl; | |
917 | ||
918 | Double_t eppzNew = (1. - z) * eppzOld; | |
919 | Double_t empzNew = empzOld - mt2 * z / eppzOld; | |
920 | Double_t eNew = 0.5 * (eppzNew + empzNew); | |
921 | Double_t plNew = 0.5 * (eppzNew - empzNew); | |
922 | ||
923 | Double_t jtNew; | |
924 | // | |
925 | // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0 | |
926 | Double_t mt2New = eppzNew * empzNew; | |
927 | if (mt2New < 1.e-8) mt2New = 0.; | |
928 | if (z < zmax) { | |
929 | if (m * m > mt2New) { | |
930 | // | |
931 | // This should not happen | |
932 | // | |
933 | Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew); | |
934 | jtNew = 0; | |
935 | } else { | |
936 | jtNew = TMath::Sqrt(mt2New - m * m); | |
937 | } | |
938 | } else { | |
939 | // If pT is to small (probably a leading massive particle) we scale only the energy | |
940 | // This can cause negative masses of the radiated gluon | |
941 | // Let's hope for the best ... | |
942 | jtNew = jt; | |
943 | eNew = TMath::Sqrt(plNew * plNew + mt2); | |
944 | ||
945 | } | |
946 | // | |
947 | // Calculate new px, py | |
948 | // | |
949 | Double_t pxNew = jtNew / jt * pxs; | |
950 | Double_t pyNew = jtNew / jt * pys; | |
951 | ||
952 | // Double_t dpx = pxs - pxNew; | |
953 | // Double_t dpy = pys - pyNew; | |
954 | // Double_t dpz = pl - plNew; | |
955 | // Double_t de = e - eNew; | |
956 | // Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz; | |
957 | // printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew); | |
958 | // printf("New mass (2) %e %e \n", pxNew, pyNew); | |
959 | // | |
960 | // Rotate back | |
961 | // | |
962 | TVector3 w(pxNew, pyNew, plNew); | |
963 | w.RotateY(thetaq[index]); w.RotateZ(phiq[index]); | |
964 | pxNew = w.X(); pyNew = w.Y(); plNew = w.Z(); | |
965 | ||
966 | p1[index][0] += pxNew; | |
967 | p1[index][1] += pyNew; | |
968 | p1[index][2] += plNew; | |
969 | p1[index][3] += eNew; | |
970 | // | |
971 | // Updated 4-momentum vectors | |
972 | // | |
973 | pNew[icount][0] = pxNew; | |
974 | pNew[icount][1] = pyNew; | |
975 | pNew[icount][2] = plNew; | |
976 | pNew[icount][3] = eNew; | |
977 | kNew[icount] = i; | |
978 | icount++; | |
979 | } // parton loop | |
980 | // | |
981 | // Check if there was phase-space for quenching | |
982 | // | |
983 | ||
984 | if (icount == 0) quenched[isys] = kFALSE; | |
985 | if (!quenched[isys]) break; | |
986 | ||
987 | for (Int_t j = 0; j < 4; j++) | |
988 | { | |
989 | p2[isys][j] = p0[isys][j] - p1[isys][j]; | |
990 | } | |
991 | p2[isys][4] = p2[isys][3] * p2[isys][3] - p2[isys][0] * p2[isys][0] - p2[isys][1] * p2[isys][1] - p2[isys][2] * p2[isys][2]; | |
992 | if (p2[isys][4] > 0.) { | |
993 | p2[isys][4] = TMath::Sqrt(p2[isys][4]); | |
994 | break; | |
995 | } else { | |
996 | printf("Warning negative mass squared in system %d %f ! \n", isys, zInitial[isys]); | |
997 | printf("4-Momentum: %10.3e %10.3e %10.3e %10.3e %10.3e \n", p2[isys][0], p2[isys][1], p2[isys][2], p2[isys][3], p2[isys][4]); | |
998 | if (p2[isys][4] < -0.01) { | |
999 | printf("Negative mass squared !\n"); | |
1000 | // Here we have to put the gluon back to mass shell | |
1001 | // This will lead to a small energy imbalance | |
1002 | p2[isys][4] = 0.; | |
1003 | p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]); | |
1004 | break; | |
1005 | } else { | |
1006 | p2[isys][4] = 0.; | |
1007 | break; | |
1008 | } | |
1009 | } | |
1010 | /* | |
1011 | zHeavy *= 0.98; | |
1012 | printf("zHeavy lowered to %f\n", zHeavy); | |
1013 | if (zHeavy < 0.01) { | |
1014 | printf("No success ! \n"); | |
1015 | icount = 0; | |
1016 | quenched[isys] = kFALSE; | |
1017 | break; | |
1018 | } | |
1019 | */ | |
1020 | } // iteration on z (while) | |
1021 | ||
1022 | // Update event record | |
1023 | for (Int_t k = 0; k < icount; k++) { | |
1024 | // printf("%6d %6d %10.3e %10.3e %10.3e %10.3e\n", k, kNew[k], pNew[k][0],pNew[k][1], pNew[k][2], pNew[k][3] ); | |
1025 | fPyjets->P[0][kNew[k]] = pNew[k][0]; | |
1026 | fPyjets->P[1][kNew[k]] = pNew[k][1]; | |
1027 | fPyjets->P[2][kNew[k]] = pNew[k][2]; | |
1028 | fPyjets->P[3][kNew[k]] = pNew[k][3]; | |
1029 | } | |
1030 | // | |
1031 | // Add the gluons | |
1032 | // | |
1033 | Int_t ish = 0; | |
1034 | Int_t iGlu; | |
1035 | if (!quenched[isys]) continue; | |
1036 | // | |
1037 | // Last parton from shower i | |
1038 | Int_t in = klast[isys]; | |
1039 | // | |
1040 | // Continue if no parton in shower i selected | |
1041 | if (in == -1) continue; | |
1042 | // | |
1043 | // If this is the second initial parton and it is behind the first move pointer by previous ish | |
1044 | if (isys == 1 && klast[1] > klast[0]) in += ish; | |
1045 | // | |
1046 | // Starting index | |
1047 | ||
1048 | // jmin = in - 1; | |
1049 | // How many additional gluons will be generated | |
1050 | ish = 1; | |
1051 | if (p2[isys][4] > 0.05) ish = 2; | |
1052 | // | |
1053 | // Position of gluons | |
1054 | iGlu = numpart; | |
1055 | if (iglu == 0) igMin = iGlu; | |
1056 | igMax = iGlu; | |
1057 | numpart += ish; | |
1058 | (fPyjets->N) += ish; | |
1059 | ||
1060 | if (ish == 1) { | |
1061 | fPyjets->P[0][iGlu] = p2[isys][0]; | |
1062 | fPyjets->P[1][iGlu] = p2[isys][1]; | |
1063 | fPyjets->P[2][iGlu] = p2[isys][2]; | |
1064 | fPyjets->P[3][iGlu] = p2[isys][3]; | |
1065 | fPyjets->P[4][iGlu] = p2[isys][4]; | |
1066 | ||
1067 | fPyjets->K[0][iGlu] = 1; | |
1068 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1; | |
1069 | fPyjets->K[1][iGlu] = 21; | |
1070 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; | |
1071 | fPyjets->K[3][iGlu] = -1; | |
1072 | fPyjets->K[4][iGlu] = -1; | |
1073 | ||
1074 | pg[0] += p2[isys][0]; | |
1075 | pg[1] += p2[isys][1]; | |
1076 | pg[2] += p2[isys][2]; | |
1077 | pg[3] += p2[isys][3]; | |
1078 | } else { | |
1079 | // | |
1080 | // Split gluon in rest frame. | |
1081 | // | |
1082 | Double_t bx = p2[isys][0] / p2[isys][3]; | |
1083 | Double_t by = p2[isys][1] / p2[isys][3]; | |
1084 | Double_t bz = p2[isys][2] / p2[isys][3]; | |
1085 | Double_t pst = p2[isys][4] / 2.; | |
1086 | // | |
1087 | // Isotropic decay ???? | |
1088 | Double_t cost = 2. * gRandom->Rndm() - 1.; | |
1089 | Double_t sint = TMath::Sqrt(1. - cost * cost); | |
1090 | Double_t phi = 2. * TMath::Pi() * gRandom->Rndm(); | |
1091 | ||
1092 | Double_t pz1 = pst * cost; | |
1093 | Double_t pz2 = -pst * cost; | |
1094 | Double_t pt1 = pst * sint; | |
1095 | Double_t pt2 = -pst * sint; | |
1096 | Double_t px1 = pt1 * TMath::Cos(phi); | |
1097 | Double_t py1 = pt1 * TMath::Sin(phi); | |
1098 | Double_t px2 = pt2 * TMath::Cos(phi); | |
1099 | Double_t py2 = pt2 * TMath::Sin(phi); | |
1100 | ||
1101 | fPyjets->P[0][iGlu] = px1; | |
1102 | fPyjets->P[1][iGlu] = py1; | |
1103 | fPyjets->P[2][iGlu] = pz1; | |
1104 | fPyjets->P[3][iGlu] = pst; | |
1105 | fPyjets->P[4][iGlu] = 0.; | |
1106 | ||
1107 | fPyjets->K[0][iGlu] = 1 ; | |
1108 | fPyjets->K[1][iGlu] = 21; | |
1109 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; | |
1110 | fPyjets->K[3][iGlu] = -1; | |
1111 | fPyjets->K[4][iGlu] = -1; | |
1112 | ||
1113 | fPyjets->P[0][iGlu+1] = px2; | |
1114 | fPyjets->P[1][iGlu+1] = py2; | |
1115 | fPyjets->P[2][iGlu+1] = pz2; | |
1116 | fPyjets->P[3][iGlu+1] = pst; | |
1117 | fPyjets->P[4][iGlu+1] = 0.; | |
1118 | ||
1119 | fPyjets->K[0][iGlu+1] = 1; | |
1120 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1; | |
1121 | fPyjets->K[1][iGlu+1] = 21; | |
1122 | fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000; | |
1123 | fPyjets->K[3][iGlu+1] = -1; | |
1124 | fPyjets->K[4][iGlu+1] = -1; | |
1125 | SetMSTU(1,0); | |
1126 | SetMSTU(2,0); | |
1127 | // | |
1128 | // Boost back | |
1129 | // | |
1130 | Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz); | |
1131 | } | |
1132 | /* | |
1133 | for (Int_t ig = iGlu; ig < iGlu+ish; ig++) { | |
1134 | Double_t px, py, pz; | |
1135 | px = fPyjets->P[0][ig]; | |
1136 | py = fPyjets->P[1][ig]; | |
1137 | pz = fPyjets->P[2][ig]; | |
1138 | TVector3 v(px, py, pz); | |
1139 | v.RotateZ(-phiq[isys]); | |
1140 | v.RotateY(-thetaq[isys]); | |
1141 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z(); | |
1142 | Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1143 | Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r)); | |
1144 | if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.); | |
1145 | Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1146 | pxs += jtKick * TMath::Cos(phiKick); | |
1147 | pys += jtKick * TMath::Sin(phiKick); | |
1148 | TVector3 w(pxs, pys, pzs); | |
1149 | w.RotateY(thetaq[isys]); | |
1150 | w.RotateZ(phiq[isys]); | |
1151 | fPyjets->P[0][ig] = w.X(); | |
1152 | fPyjets->P[1][ig] = w.Y(); | |
1153 | fPyjets->P[2][ig] = w.Z(); | |
1154 | fPyjets->P[2][ig] = w.Mag(); | |
1155 | } | |
1156 | */ | |
1157 | } // kGluon | |
1158 | ||
1159 | ||
1160 | // Check energy conservation | |
1161 | Double_t pxs = 0.; | |
1162 | Double_t pys = 0.; | |
1163 | Double_t pzs = 0.; | |
1164 | Double_t es = 14000.; | |
1165 | ||
1166 | for (Int_t i = 0; i < numpart; i++) | |
1167 | { | |
1168 | kst = fPyjets->K[0][i]; | |
1169 | if (kst != 1 && kst != 2) continue; | |
1170 | pxs += fPyjets->P[0][i]; | |
1171 | pys += fPyjets->P[1][i]; | |
1172 | pzs += fPyjets->P[2][i]; | |
1173 | es -= fPyjets->P[3][i]; | |
1174 | } | |
1175 | if (TMath::Abs(pxs) > 1.e-2 || | |
1176 | TMath::Abs(pys) > 1.e-2 || | |
1177 | TMath::Abs(pzs) > 1.e-1) { | |
1178 | printf("%e %e %e %e\n", pxs, pys, pzs, es); | |
1179 | // Fatal("Quench()", "4-Momentum non-conservation"); | |
1180 | } | |
1181 | ||
1182 | } // end quenching loop (systems) | |
1183 | // Clean-up | |
1184 | for (Int_t i = 0; i < numpart; i++) | |
1185 | { | |
1186 | imo = fPyjets->K[2][i]; | |
1187 | if (imo > 1000) { | |
1188 | fPyjets->K[2][i] = fPyjets->K[2][i] % 1000; | |
1189 | } | |
1190 | } | |
1191 | // this->Pylist(1); | |
1192 | } // end quench | |
1193 |