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8d2cd130 | 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 | ||
7cdba479 | 16 | /* $Id$ */ |
8d2cd130 | 17 | |
18 | #include "AliPythia.h" | |
7cdba479 | 19 | #include "AliPythiaRndm.h" |
0f482ae4 | 20 | #include "../FASTSIM/AliFastGlauber.h" |
21 | #include "../FASTSIM/AliQuenchingWeights.h" | |
22 | #include "TVector3.h" | |
8d2cd130 | 23 | |
24 | ClassImp(AliPythia) | |
25 | ||
26 | #ifndef WIN32 | |
27 | # define pyclus pyclus_ | |
28 | # define pycell pycell_ | |
452af8c7 | 29 | # define pyshow pyshow_ |
30 | # define pyrobo pyrobo_ | |
8d2cd130 | 31 | # define type_of_call |
32 | #else | |
33 | # define pyclus PYCLUS | |
34 | # define pycell PYCELL | |
452af8c7 | 35 | # define pyrobo PYROBO |
8d2cd130 | 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 & ); | |
452af8c7 | 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 &); | |
8d2cd130 | 43 | |
44 | //_____________________________________________________________________________ | |
45 | ||
46 | AliPythia* AliPythia::fgAliPythia=NULL; | |
47 | ||
48 | AliPythia::AliPythia() | |
49 | { | |
50 | // Default Constructor | |
51 | // | |
52 | // Set random number | |
7cdba479 | 53 | if (!AliPythiaRndm::GetPythiaRandom()) |
54 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
0f482ae4 | 55 | fGlauber = 0; |
56 | fQuenchingWeights = 0; | |
8d2cd130 | 57 | } |
58 | ||
59 | void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc) | |
60 | { | |
61 | // Initialise the process to generate | |
7cdba479 | 62 | if (!AliPythiaRndm::GetPythiaRandom()) |
63 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
8d2cd130 | 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); | |
511db649 | 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 | // | |
0f482ae4 | 151 | SetMSTP(51,7); // CTEQ5L pdf |
511db649 | 152 | SetMSTP(81,1); // Multiple Interactions ON |
153 | SetMSTP(82,4); // Double Gaussian Model | |
154 | ||
155 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy | |
156 | SetPARP(89,1000.); // [GeV] Ref. energy | |
157 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) | |
158 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
159 | SetPARP(84,0.5); // Core radius | |
160 | SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
161 | SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
162 | SetPARP(67,1); // Regulates Initial State Radiation | |
163 | break; | |
8d2cd130 | 164 | case kPyMbNonDiffr: |
165 | // Minimum Bias pp-Collisions | |
166 | // | |
167 | // | |
168 | // select Pythia min. bias model | |
169 | SetMSEL(0); | |
511db649 | 170 | SetMSUB(95,1); // low pt production |
0f482ae4 | 171 | |
172 | // | |
173 | // ATLAS Tuning | |
174 | // | |
511db649 | 175 | |
0f482ae4 | 176 | SetMSTP(51,7); // CTEQ5L pdf |
511db649 | 177 | SetMSTP(81,1); // Multiple Interactions ON |
178 | SetMSTP(82,4); // Double Gaussian Model | |
179 | ||
180 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy | |
181 | SetPARP(89,1000.); // [GeV] Ref. energy | |
182 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) | |
183 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
184 | SetPARP(84,0.5); // Core radius | |
185 | SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
186 | SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
187 | SetPARP(67,1); // Regulates Initial State Radiation | |
8d2cd130 | 188 | break; |
189 | case kPyJets: | |
190 | // | |
191 | // QCD Jets | |
192 | // | |
193 | SetMSEL(1); | |
194 | break; | |
195 | case kPyDirectGamma: | |
196 | SetMSEL(10); | |
197 | break; | |
adf4d898 | 198 | case kPyCharmPbPbMNR: |
199 | case kPyD0PbPbMNR: | |
8d2cd130 | 200 | // Tuning of Pythia parameters aimed to get a resonable agreement |
201 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
202 | // c-cbar single inclusive and double differential distributions. | |
203 | // This parameter settings are meant to work with Pb-Pb collisions | |
adf4d898 | 204 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
8d2cd130 | 205 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
206 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
207 | ||
208 | // All QCD processes | |
209 | SetMSEL(1); | |
210 | ||
211 | // No multiple interactions | |
212 | SetMSTP(81,0); | |
213 | SetPARP(81,0.0); | |
214 | SetPARP(82,0.0); | |
215 | ||
216 | // Initial/final parton shower on (Pythia default) | |
217 | SetMSTP(61,1); | |
218 | SetMSTP(71,1); | |
219 | ||
220 | // 2nd order alpha_s | |
221 | SetMSTP(2,2); | |
222 | ||
223 | // QCD scales | |
224 | SetMSTP(32,2); | |
225 | SetPARP(34,1.0); | |
226 | ||
adf4d898 | 227 | // Intrinsic <kT> |
8d2cd130 | 228 | SetMSTP(91,1); |
229 | SetPARP(91,1.304); | |
230 | SetPARP(93,6.52); | |
231 | ||
232 | // Set c-quark mass | |
233 | SetPMAS(4,1,1.2); | |
234 | ||
90d7b703 | 235 | break; |
236 | case kPyDPlusPbPbMNR: | |
237 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
238 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
239 | // c-cbar single inclusive and double differential distributions. | |
240 | // This parameter settings are meant to work with Pb-Pb collisions | |
241 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
242 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
243 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
244 | ||
245 | // All QCD processes | |
246 | SetMSEL(1); | |
247 | ||
248 | // No multiple interactions | |
249 | SetMSTP(81,0); | |
250 | SetPARP(81,0.0); | |
251 | SetPARP(82,0.0); | |
252 | ||
253 | // Initial/final parton shower on (Pythia default) | |
254 | SetMSTP(61,1); | |
255 | SetMSTP(71,1); | |
256 | ||
257 | // 2nd order alpha_s | |
258 | SetMSTP(2,2); | |
259 | ||
260 | // QCD scales | |
261 | SetMSTP(32,2); | |
262 | SetPARP(34,1.0); | |
263 | ||
264 | // Intrinsic <kT> | |
265 | SetMSTP(91,1); | |
266 | SetPARP(91,1.304); | |
267 | SetPARP(93,6.52); | |
268 | ||
269 | // Set c-quark mass | |
270 | SetPMAS(4,1,1.2); | |
271 | ||
8d2cd130 | 272 | break; |
adf4d898 | 273 | case kPyCharmpPbMNR: |
274 | case kPyD0pPbMNR: | |
275 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
276 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
277 | // c-cbar single inclusive and double differential distributions. | |
278 | // This parameter settings are meant to work with p-Pb collisions | |
279 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
280 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
281 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
282 | ||
283 | // All QCD processes | |
284 | SetMSEL(1); | |
285 | ||
286 | // No multiple interactions | |
287 | SetMSTP(81,0); | |
288 | SetPARP(81,0.0); | |
289 | SetPARP(82,0.0); | |
290 | ||
291 | // Initial/final parton shower on (Pythia default) | |
292 | SetMSTP(61,1); | |
293 | SetMSTP(71,1); | |
294 | ||
295 | // 2nd order alpha_s | |
296 | SetMSTP(2,2); | |
297 | ||
298 | // QCD scales | |
299 | SetMSTP(32,2); | |
300 | SetPARP(34,1.0); | |
301 | ||
302 | // Intrinsic <kT> | |
303 | SetMSTP(91,1); | |
304 | SetPARP(91,1.16); | |
305 | SetPARP(93,5.8); | |
306 | ||
307 | // Set c-quark mass | |
308 | SetPMAS(4,1,1.2); | |
309 | ||
90d7b703 | 310 | break; |
311 | case kPyDPluspPbMNR: | |
312 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
313 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
314 | // c-cbar single inclusive and double differential distributions. | |
315 | // This parameter settings are meant to work with p-Pb collisions | |
316 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
317 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
318 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
319 | ||
320 | // All QCD processes | |
321 | SetMSEL(1); | |
322 | ||
323 | // No multiple interactions | |
324 | SetMSTP(81,0); | |
325 | SetPARP(81,0.0); | |
326 | SetPARP(82,0.0); | |
327 | ||
328 | // Initial/final parton shower on (Pythia default) | |
329 | SetMSTP(61,1); | |
330 | SetMSTP(71,1); | |
331 | ||
332 | // 2nd order alpha_s | |
333 | SetMSTP(2,2); | |
334 | ||
335 | // QCD scales | |
336 | SetMSTP(32,2); | |
337 | SetPARP(34,1.0); | |
338 | ||
339 | // Intrinsic <kT> | |
340 | SetMSTP(91,1); | |
341 | SetPARP(91,1.16); | |
342 | SetPARP(93,5.8); | |
343 | ||
344 | // Set c-quark mass | |
345 | SetPMAS(4,1,1.2); | |
346 | ||
adf4d898 | 347 | break; |
348 | case kPyCharmppMNR: | |
349 | case kPyD0ppMNR: | |
350 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
351 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
352 | // c-cbar single inclusive and double differential distributions. | |
353 | // This parameter settings are meant to work with pp collisions | |
354 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
355 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
356 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
357 | ||
358 | // All QCD processes | |
359 | SetMSEL(1); | |
360 | ||
361 | // No multiple interactions | |
362 | SetMSTP(81,0); | |
363 | SetPARP(81,0.0); | |
364 | SetPARP(82,0.0); | |
365 | ||
366 | // Initial/final parton shower on (Pythia default) | |
367 | SetMSTP(61,1); | |
368 | SetMSTP(71,1); | |
369 | ||
370 | // 2nd order alpha_s | |
371 | SetMSTP(2,2); | |
372 | ||
373 | // QCD scales | |
374 | SetMSTP(32,2); | |
375 | SetPARP(34,1.0); | |
376 | ||
377 | // Intrinsic <kT^2> | |
378 | SetMSTP(91,1); | |
379 | SetPARP(91,1.); | |
380 | SetPARP(93,5.); | |
381 | ||
382 | // Set c-quark mass | |
383 | SetPMAS(4,1,1.2); | |
384 | ||
90d7b703 | 385 | break; |
386 | case kPyDPlusppMNR: | |
387 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
388 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
389 | // c-cbar single inclusive and double differential distributions. | |
390 | // This parameter settings are meant to work with pp collisions | |
391 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
392 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
393 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
394 | ||
395 | // All QCD processes | |
396 | SetMSEL(1); | |
397 | ||
398 | // No multiple interactions | |
399 | SetMSTP(81,0); | |
400 | SetPARP(81,0.0); | |
401 | SetPARP(82,0.0); | |
402 | ||
403 | // Initial/final parton shower on (Pythia default) | |
404 | SetMSTP(61,1); | |
405 | SetMSTP(71,1); | |
406 | ||
407 | // 2nd order alpha_s | |
408 | SetMSTP(2,2); | |
409 | ||
410 | // QCD scales | |
411 | SetMSTP(32,2); | |
412 | SetPARP(34,1.0); | |
413 | ||
414 | // Intrinsic <kT^2> | |
415 | SetMSTP(91,1); | |
416 | SetPARP(91,1.); | |
417 | SetPARP(93,5.); | |
418 | ||
419 | // Set c-quark mass | |
420 | SetPMAS(4,1,1.2); | |
421 | ||
adf4d898 | 422 | break; |
423 | case kPyBeautyPbPbMNR: | |
8d2cd130 | 424 | // Tuning of Pythia parameters aimed to get a resonable agreement |
425 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
426 | // b-bbar single inclusive and double differential distributions. | |
427 | // This parameter settings are meant to work with Pb-Pb collisions | |
428 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
429 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
430 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
431 | ||
432 | // All QCD processes | |
433 | SetMSEL(1); | |
434 | ||
435 | // No multiple interactions | |
436 | SetMSTP(81,0); | |
437 | SetPARP(81,0.0); | |
438 | SetPARP(82,0.0); | |
439 | ||
440 | // Initial/final parton shower on (Pythia default) | |
441 | SetMSTP(61,1); | |
442 | SetMSTP(71,1); | |
443 | ||
444 | // 2nd order alpha_s | |
445 | SetMSTP(2,2); | |
446 | ||
447 | // QCD scales | |
448 | SetMSTP(32,2); | |
449 | SetPARP(34,1.0); | |
450 | SetPARP(67,1.0); | |
451 | SetPARP(71,1.0); | |
452 | ||
adf4d898 | 453 | // Intrinsic <kT> |
8d2cd130 | 454 | SetMSTP(91,1); |
455 | SetPARP(91,2.035); | |
456 | SetPARP(93,10.17); | |
457 | ||
458 | // Set b-quark mass | |
459 | SetPMAS(5,1,4.75); | |
460 | ||
adf4d898 | 461 | break; |
462 | case kPyBeautypPbMNR: | |
463 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
464 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
465 | // b-bbar single inclusive and double differential distributions. | |
466 | // This parameter settings are meant to work with p-Pb collisions | |
467 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
468 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
469 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
470 | ||
471 | // All QCD processes | |
472 | SetMSEL(1); | |
473 | ||
474 | // No multiple interactions | |
475 | SetMSTP(81,0); | |
476 | SetPARP(81,0.0); | |
477 | SetPARP(82,0.0); | |
478 | ||
479 | // Initial/final parton shower on (Pythia default) | |
480 | SetMSTP(61,1); | |
481 | SetMSTP(71,1); | |
482 | ||
483 | // 2nd order alpha_s | |
484 | SetMSTP(2,2); | |
485 | ||
486 | // QCD scales | |
487 | SetMSTP(32,2); | |
488 | SetPARP(34,1.0); | |
489 | SetPARP(67,1.0); | |
490 | SetPARP(71,1.0); | |
491 | ||
492 | // Intrinsic <kT> | |
493 | SetMSTP(91,1); | |
494 | SetPARP(91,1.60); | |
495 | SetPARP(93,8.00); | |
496 | ||
497 | // Set b-quark mass | |
498 | SetPMAS(5,1,4.75); | |
499 | ||
500 | break; | |
501 | case kPyBeautyppMNR: | |
502 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
503 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
504 | // b-bbar single inclusive and double differential distributions. | |
505 | // This parameter settings are meant to work with pp collisions | |
506 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
507 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
508 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
509 | ||
510 | // All QCD processes | |
511 | SetMSEL(1); | |
512 | ||
513 | // No multiple interactions | |
514 | SetMSTP(81,0); | |
515 | SetPARP(81,0.0); | |
516 | SetPARP(82,0.0); | |
517 | ||
518 | // Initial/final parton shower on (Pythia default) | |
519 | SetMSTP(61,1); | |
520 | SetMSTP(71,1); | |
521 | ||
522 | // 2nd order alpha_s | |
523 | SetMSTP(2,2); | |
524 | ||
525 | // QCD scales | |
526 | SetMSTP(32,2); | |
527 | SetPARP(34,1.0); | |
528 | SetPARP(67,1.0); | |
529 | SetPARP(71,1.0); | |
530 | ||
531 | // Intrinsic <kT> | |
532 | SetMSTP(91,1); | |
533 | SetPARP(91,1.); | |
534 | SetPARP(93,5.); | |
535 | ||
536 | // Set b-quark mass | |
537 | SetPMAS(5,1,4.75); | |
538 | ||
8d2cd130 | 539 | break; |
540 | } | |
541 | // | |
542 | // Initialize PYTHIA | |
543 | SetMSTP(41,1); // all resonance decays switched on | |
544 | ||
545 | Initialize("CMS","p","p",fEcms); | |
546 | ||
547 | } | |
548 | ||
549 | Int_t AliPythia::CheckedLuComp(Int_t kf) | |
550 | { | |
551 | // Check Lund particle code (for debugging) | |
552 | Int_t kc=Pycomp(kf); | |
553 | printf("\n Lucomp kf,kc %d %d",kf,kc); | |
554 | return kc; | |
555 | } | |
556 | ||
557 | void AliPythia::SetNuclei(Int_t a1, Int_t a2) | |
558 | { | |
559 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
560 | // The MSTP array in the PYPARS common block is used to enable and | |
561 | // select the nuclear structure functions. | |
562 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
563 | // =1: internal PYTHIA acording to MSTP(51) | |
564 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
565 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
566 | // MSTP(192) : Mass number of nucleus side 1 | |
567 | // MSTP(193) : Mass number of nucleus side 2 | |
568 | SetMSTP(52,2); | |
569 | SetMSTP(192, a1); | |
570 | SetMSTP(193, a2); | |
571 | } | |
572 | ||
573 | ||
574 | AliPythia* AliPythia::Instance() | |
575 | { | |
576 | // Set random number generator | |
577 | if (fgAliPythia) { | |
578 | return fgAliPythia; | |
579 | } else { | |
580 | fgAliPythia = new AliPythia(); | |
581 | return fgAliPythia; | |
582 | } | |
583 | } | |
584 | ||
585 | void AliPythia::PrintParticles() | |
586 | { | |
587 | // Print list of particl properties | |
588 | Int_t np = 0; | |
c31f1d37 | 589 | char* name = new char[16]; |
8d2cd130 | 590 | for (Int_t kf=0; kf<1000000; kf++) { |
591 | for (Int_t c = 1; c > -2; c-=2) { | |
8d2cd130 | 592 | Int_t kc = Pycomp(c*kf); |
593 | if (kc) { | |
594 | Float_t mass = GetPMAS(kc,1); | |
595 | Float_t width = GetPMAS(kc,2); | |
596 | Float_t tau = GetPMAS(kc,4); | |
c31f1d37 | 597 | |
8d2cd130 | 598 | Pyname(kf,name); |
599 | ||
600 | np++; | |
601 | ||
602 | printf("\n mass, width, tau: %6d %s %10.3f %10.3e %10.3e", | |
603 | c*kf, name, mass, width, tau); | |
604 | } | |
605 | } | |
606 | } | |
607 | printf("\n Number of particles %d \n \n", np); | |
608 | } | |
609 | ||
610 | void AliPythia::ResetDecayTable() | |
611 | { | |
612 | // Set default values for pythia decay switches | |
613 | Int_t i; | |
614 | for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
615 | for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
616 | } | |
617 | ||
618 | void AliPythia::SetDecayTable() | |
619 | { | |
620 | // Set default values for pythia decay switches | |
621 | // | |
622 | Int_t i; | |
623 | for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
624 | for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
625 | } | |
626 | ||
627 | void AliPythia::Pyclus(Int_t& njet) | |
628 | { | |
629 | // Call Pythia clustering algorithm | |
630 | // | |
631 | pyclus(njet); | |
632 | } | |
633 | ||
634 | void AliPythia::Pycell(Int_t& njet) | |
635 | { | |
636 | // Call Pythia jet reconstruction algorithm | |
637 | // | |
638 | pycell(njet); | |
639 | } | |
640 | ||
452af8c7 | 641 | void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax) |
642 | { | |
643 | // Call Pythia jet reconstruction algorithm | |
644 | // | |
452af8c7 | 645 | pyshow(ip1, ip2, qmax); |
646 | } | |
647 | ||
648 | void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez) | |
649 | { | |
650 | pyrobo(imi, ima, the, phi, bex, bey, bez); | |
651 | } | |
652 | ||
653 | ||
654 | ||
0f482ae4 | 655 | void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t qTransport, Float_t maxLength, Int_t iECMethod) |
656 | { | |
657 | // Initializes | |
658 | // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann | |
659 | // (2) The nuclear geometry using the Glauber Model | |
660 | // | |
661 | ||
662 | ||
663 | fGlauber = new AliFastGlauber(); | |
664 | fGlauber->Init(2); | |
665 | fGlauber->SetCentralityClass(cMin, cMax); | |
666 | ||
667 | fQuenchingWeights = new AliQuenchingWeights(); | |
668 | fQuenchingWeights->InitMult(); | |
669 | fQuenchingWeights->SetQTransport(qTransport); | |
670 | fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod)); | |
671 | fQuenchingWeights->SetLengthMax(Int_t(maxLength)); | |
672 | fQuenchingWeights->SampleEnergyLoss(); | |
673 | ||
674 | } | |
675 | ||
676 | ||
452af8c7 | 677 | void AliPythia::Quench() |
678 | { | |
679 | // | |
680 | // | |
681 | // Simple Jet Quenching routine: | |
682 | // ============================= | |
683 | // The jet formed by all final state partons radiated by the parton created | |
0f482ae4 | 684 | // in the hard collisions is quenched by a factor (1-z) using light cone variables in |
685 | // the initial parton reference frame: | |
452af8c7 | 686 | // (E + p_z)new = (1-z) (E + p_z)old |
687 | // | |
0f482ae4 | 688 | // |
689 | // | |
690 | // | |
452af8c7 | 691 | // The lost momentum is first balanced by one gluon with virtuality > 0. |
692 | // Subsequently the gluon splits to yield two gluons with E = p. | |
693 | // | |
0f482ae4 | 694 | // |
695 | // | |
4e383037 | 696 | static Float_t eMean = 0.; |
697 | static Int_t icall = 0; | |
0f482ae4 | 698 | |
699 | Double_t p0[2][5]; | |
700 | Double_t p1[2][5]; | |
701 | Double_t p2[2][5]; | |
452af8c7 | 702 | Int_t klast[2] = {-1, -1}; |
452af8c7 | 703 | |
704 | Int_t numpart = fPyjets->N; | |
0f482ae4 | 705 | Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0.; |
706 | Double_t pxq[2], pyq[2], pzq[2], eq[2], yq[2], mq[2], pq[2], phiq[2], thetaq[2], ptq[2]; | |
707 | Bool_t quenched[2]; | |
708 | Double_t phi; | |
709 | Double_t zInitial[2], wjtKick[2]; | |
4e383037 | 710 | Int_t nGluon[2]; |
711 | ||
0f482ae4 | 712 | Int_t imo, kst, pdg; |
511db649 | 713 | // |
0f482ae4 | 714 | // Primary partons |
511db649 | 715 | // |
4e383037 | 716 | |
717 | ||
0f482ae4 | 718 | |
719 | for (Int_t i = 6; i <= 7; i++) { | |
720 | Int_t j = i - 6; | |
452af8c7 | 721 | |
0f482ae4 | 722 | pxq[j] = fPyjets->P[0][i]; |
723 | pyq[j] = fPyjets->P[1][i]; | |
724 | pzq[j] = fPyjets->P[2][i]; | |
725 | eq[j] = fPyjets->P[3][i]; | |
726 | mq[j] = fPyjets->P[4][i]; | |
4e383037 | 727 | yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14)); |
0f482ae4 | 728 | pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]); |
729 | phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]); | |
730 | ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]); | |
731 | thetaq[j] = TMath::ATan2(ptq[j], pzq[j]); | |
732 | phi = phiq[j]; | |
733 | ||
734 | // Quench only central jets | |
735 | if (TMath::Abs(yq[j]) > 2.5) { | |
736 | zInitial[j] = 0.; | |
737 | } else { | |
738 | pdg = fPyjets->K[1][i]; | |
739 | ||
740 | // Get length in nucleus | |
741 | Double_t l; | |
742 | fGlauber->GetLengthsForPythia(1, &phi, &l, -1.); | |
743 | // | |
744 | // Energy loss for given length and parton typr | |
745 | Int_t itype = (pdg == 21) ? 2 : 1; | |
4e383037 | 746 | |
0f482ae4 | 747 | Double_t eloss = fQuenchingWeights->GetELossRandom(itype, l, eq[j]); |
4e383037 | 748 | if (eq[j] > 80. && TMath::Abs(yq[j]) < 0.5) { |
749 | icall ++; | |
750 | eMean += eloss; | |
751 | } | |
752 | ||
0f482ae4 | 753 | // |
754 | // Extra pt | |
4e383037 | 755 | |
0f482ae4 | 756 | wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->GetQTransport()); |
757 | // | |
758 | // Fractional energy loss | |
759 | zInitial[j] = eloss / eq[j]; | |
760 | // | |
761 | // Avoid complete loss | |
762 | // | |
763 | if (zInitial[j] == 1.) zInitial[j] = 0.95; | |
764 | // | |
765 | // Some debug printing | |
4e383037 | 766 | 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", |
767 | j, itype, eq[j], phi, l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]); | |
768 | ||
769 | zInitial[j] = 1.; | |
770 | while (zInitial[j] >= 0.95) zInitial[j] = gRandom->Exp(0.2); | |
0f482ae4 | 771 | } |
4e383037 | 772 | |
0f482ae4 | 773 | quenched[j] = (zInitial[j] > 0.01); |
4e383037 | 774 | } // primary partons |
0f482ae4 | 775 | |
6e90ad26 | 776 | Double_t pNew[1000][4]; |
777 | Int_t kNew[1000]; | |
778 | Int_t icount = 0; | |
779 | // | |
4e383037 | 780 | // System Loop |
781 | for (Int_t isys = 0; isys < 2; isys++) { | |
6e90ad26 | 782 | // Skip to next system if not quenched. |
4e383037 | 783 | if (!quenched[isys]) continue; |
784 | ||
785 | nGluon[isys] = 1 + Int_t(zInitial[isys] / (1. - zInitial[isys])); | |
786 | if (nGluon[isys] > 6) nGluon[isys] = 6; | |
787 | zInitial[isys] = 1. - TMath::Power(1. - zInitial[isys], 1./Double_t(nGluon[isys])); | |
788 | wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys])); | |
0f482ae4 | 789 | |
4e383037 | 790 | |
791 | ||
792 | Int_t igMin = -1; | |
793 | Int_t igMax = -1; | |
794 | Double_t pg[4] = {0., 0., 0., 0.}; | |
795 | ||
796 | // | |
797 | // Loop on radiation events | |
798 | ||
799 | for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) { | |
6e90ad26 | 800 | Double_t zHeavy = zInitial[isys]; |
6e90ad26 | 801 | // |
4e383037 | 802 | |
6e90ad26 | 803 | while (1) { |
804 | icount = 0; | |
805 | for (Int_t k = 0; k < 4; k++) | |
806 | { | |
807 | p0[isys][k] = 0.; | |
808 | p1[isys][k] = 0.; | |
809 | p2[isys][k] = 0.; | |
810 | } | |
811 | // Loop over partons | |
812 | for (Int_t i = 0; i < numpart; i++) | |
813 | { | |
814 | imo = fPyjets->K[2][i]; | |
815 | kst = fPyjets->K[0][i]; | |
816 | pdg = fPyjets->K[1][i]; | |
817 | ||
818 | ||
819 | ||
0f482ae4 | 820 | // Quarks and gluons only |
6e90ad26 | 821 | if (pdg != 21 && TMath::Abs(pdg) > 6) continue; |
0f482ae4 | 822 | // Particles from hard scattering only |
6e90ad26 | 823 | if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1]; |
4e383037 | 824 | if (imo != (isys + 7) && (imo % 1000) != (isys + 7)) continue; |
6e90ad26 | 825 | |
0f482ae4 | 826 | // Skip comment lines |
6e90ad26 | 827 | if (kst != 1 && kst != 2) continue; |
0f482ae4 | 828 | // |
829 | // Parton kinematic | |
6e90ad26 | 830 | px = fPyjets->P[0][i]; |
831 | py = fPyjets->P[1][i]; | |
832 | pz = fPyjets->P[2][i]; | |
833 | e = fPyjets->P[3][i]; | |
834 | m = fPyjets->P[4][i]; | |
835 | pt = TMath::Sqrt(px * px + py * py); | |
836 | p = TMath::Sqrt(px * px + py * py + pz * pz); | |
837 | phi = TMath::Pi() + TMath::ATan2(-py, -px); | |
838 | theta = TMath::ATan2(pt, pz); | |
839 | ||
0f482ae4 | 840 | // |
841 | // Save 4-momentum sum for balancing | |
6e90ad26 | 842 | Int_t index = imo - 7; |
4e383037 | 843 | if (index >= 1000) index = imo % 1000 - 7; |
6e90ad26 | 844 | |
845 | p0[index][0] += px; | |
846 | p0[index][1] += py; | |
847 | p0[index][2] += pz; | |
848 | p0[index][3] += e; | |
6e90ad26 | 849 | |
850 | klast[index] = i; | |
851 | ||
0f482ae4 | 852 | // |
853 | // Fractional energy loss | |
6e90ad26 | 854 | Double_t z = zInitial[index]; |
4e383037 | 855 | |
856 | // Don't fully quench radiated gluons | |
857 | // | |
858 | if (imo > 1000) { | |
859 | // This small factor makes sure that the gluons are not too close in phase space to avoid recombination | |
860 | // | |
861 | ||
862 | z = 0.05; | |
863 | } | |
864 | ||
865 | // | |
866 | ||
6e90ad26 | 867 | if (m > 0.) z = zHeavy; |
868 | ||
869 | // | |
870 | // | |
871 | // Transform into frame in which initial parton is along z-axis | |
872 | // | |
873 | TVector3 v(px, py, pz); | |
874 | v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]); | |
875 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z(); | |
876 | ||
877 | Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys); | |
878 | Double_t mt2 = jt * jt + m * m; | |
879 | Double_t zmax = 1.; | |
880 | // | |
881 | // Kinematic limit on z | |
882 | // | |
4e383037 | 883 | if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt); |
6e90ad26 | 884 | // |
885 | // Change light-cone kinematics rel. to initial parton | |
886 | // | |
887 | Double_t eppzOld = e + pl; | |
888 | Double_t empzOld = e - pl; | |
889 | ||
890 | Double_t eppzNew = (1. - z) * eppzOld; | |
891 | Double_t empzNew = empzOld - mt2 * z / eppzOld; | |
892 | Double_t eNew = 0.5 * (eppzNew + empzNew); | |
893 | Double_t plNew = 0.5 * (eppzNew - empzNew); | |
894 | ||
895 | Double_t jtNew; | |
896 | // | |
897 | // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0 | |
898 | Double_t mt2New = eppzNew * empzNew; | |
899 | if (mt2New < 1.e-8) mt2New = 0.; | |
4e383037 | 900 | if (z < zmax) { |
901 | if (m * m > mt2New) { | |
902 | // | |
903 | // This should not happen | |
904 | // | |
905 | Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew); | |
906 | jtNew = 0; | |
907 | } else { | |
908 | jtNew = TMath::Sqrt(mt2New - m * m); | |
909 | } | |
6e90ad26 | 910 | } else { |
4e383037 | 911 | // If pT is to small (probably a leading massive particle) we scale only the energy |
912 | // This can cause negative masses of the radiated gluon | |
913 | // Let's hope for the best ... | |
914 | jtNew = jt; | |
915 | eNew = TMath::Sqrt(plNew * plNew + mt2); | |
916 | ||
6e90ad26 | 917 | } |
6e90ad26 | 918 | // |
919 | // Calculate new px, py | |
920 | // | |
921 | Double_t pxNew = jtNew / jt * pxs; | |
922 | Double_t pyNew = jtNew / jt * pys; | |
923 | ||
924 | // Double_t dpx = pxs - pxNew; | |
925 | // Double_t dpy = pys - pyNew; | |
926 | // Double_t dpz = pl - plNew; | |
927 | // Double_t de = e - eNew; | |
928 | // Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz; | |
929 | // printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew); | |
930 | // printf("New mass (2) %e %e \n", pxNew, pyNew); | |
931 | // | |
932 | // Rotate back | |
933 | // | |
934 | TVector3 w(pxNew, pyNew, plNew); | |
935 | w.RotateY(thetaq[index]); w.RotateZ(phiq[index]); | |
936 | pxNew = w.X(); pyNew = w.Y(); plNew = w.Z(); | |
937 | ||
938 | p1[index][0] += pxNew; | |
939 | p1[index][1] += pyNew; | |
940 | p1[index][2] += plNew; | |
941 | p1[index][3] += eNew; | |
942 | // | |
943 | // Updated 4-momentum vectors | |
944 | // | |
945 | pNew[icount][0] = pxNew; | |
946 | pNew[icount][1] = pyNew; | |
947 | pNew[icount][2] = plNew; | |
948 | pNew[icount][3] = eNew; | |
949 | kNew[icount] = i; | |
950 | icount++; | |
951 | } // parton loop | |
0f482ae4 | 952 | // |
6e90ad26 | 953 | // Check if there was phase-space for quenching |
0f482ae4 | 954 | // |
0f482ae4 | 955 | |
6e90ad26 | 956 | if (icount == 0) quenched[isys] = kFALSE; |
957 | if (!quenched[isys]) break; | |
958 | ||
959 | for (Int_t j = 0; j < 4; j++) | |
960 | { | |
961 | p2[isys][j] = p0[isys][j] - p1[isys][j]; | |
962 | } | |
963 | 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]; | |
6e90ad26 | 964 | if (p2[isys][4] > 0.) { |
965 | p2[isys][4] = TMath::Sqrt(p2[isys][4]); | |
966 | break; | |
967 | } else { | |
968 | printf("Warning negative mass squared in system %d %f ! \n", isys, zInitial[isys]); | |
4e383037 | 969 | 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]); |
6e90ad26 | 970 | if (p2[isys][4] < -0.01) { |
4e383037 | 971 | printf("Negative mass squared !\n"); |
972 | // Here we have to put the gluon back to mass shell | |
973 | // This will lead to a small energy imbalance | |
974 | p2[isys][4] = 0.; | |
975 | p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]); | |
976 | break; | |
6e90ad26 | 977 | } else { |
978 | p2[isys][4] = 0.; | |
979 | break; | |
980 | } | |
981 | } | |
6e90ad26 | 982 | /* |
6e90ad26 | 983 | zHeavy *= 0.98; |
984 | printf("zHeavy lowered to %f\n", zHeavy); | |
985 | if (zHeavy < 0.01) { | |
986 | printf("No success ! \n"); | |
987 | icount = 0; | |
988 | quenched[isys] = kFALSE; | |
989 | break; | |
990 | } | |
4e383037 | 991 | */ |
992 | } // iteration on z (while) | |
993 | ||
6e90ad26 | 994 | // Update event record |
995 | for (Int_t k = 0; k < icount; k++) { | |
996 | // 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] ); | |
997 | fPyjets->P[0][kNew[k]] = pNew[k][0]; | |
998 | fPyjets->P[1][kNew[k]] = pNew[k][1]; | |
999 | fPyjets->P[2][kNew[k]] = pNew[k][2]; | |
1000 | fPyjets->P[3][kNew[k]] = pNew[k][3]; | |
0f482ae4 | 1001 | } |
4e383037 | 1002 | // |
1003 | // Add the gluons | |
1004 | // | |
1005 | Int_t ish = 0; | |
1837e95c | 1006 | Int_t iGlu; |
4e383037 | 1007 | if (!quenched[isys]) continue; |
0f482ae4 | 1008 | // |
1009 | // Last parton from shower i | |
4e383037 | 1010 | Int_t in = klast[isys]; |
0f482ae4 | 1011 | // |
1012 | // Continue if no parton in shower i selected | |
1013 | if (in == -1) continue; | |
1014 | // | |
1015 | // If this is the second initial parton and it is behind the first move pointer by previous ish | |
4e383037 | 1016 | if (isys == 1 && klast[1] > klast[0]) in += ish; |
0f482ae4 | 1017 | // |
1018 | // Starting index | |
452af8c7 | 1019 | |
4e383037 | 1020 | // jmin = in - 1; |
0f482ae4 | 1021 | // How many additional gluons will be generated |
1022 | ish = 1; | |
4e383037 | 1023 | if (p2[isys][4] > 0.05) ish = 2; |
0f482ae4 | 1024 | // |
1025 | // Position of gluons | |
4e383037 | 1026 | iGlu = numpart; |
1027 | if (iglu == 0) igMin = iGlu; | |
1028 | igMax = iGlu; | |
0f482ae4 | 1029 | numpart += ish; |
1030 | (fPyjets->N) += ish; | |
4e383037 | 1031 | |
0f482ae4 | 1032 | if (ish == 1) { |
4e383037 | 1033 | fPyjets->P[0][iGlu] = p2[isys][0]; |
1034 | fPyjets->P[1][iGlu] = p2[isys][1]; | |
1035 | fPyjets->P[2][iGlu] = p2[isys][2]; | |
1036 | fPyjets->P[3][iGlu] = p2[isys][3]; | |
1037 | fPyjets->P[4][iGlu] = p2[isys][4]; | |
0f482ae4 | 1038 | |
4e383037 | 1039 | fPyjets->K[0][iGlu] = 1; |
1040 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1; | |
0f482ae4 | 1041 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 1042 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1043 | fPyjets->K[3][iGlu] = -1; |
1044 | fPyjets->K[4][iGlu] = -1; | |
4e383037 | 1045 | |
1046 | pg[0] += p2[isys][0]; | |
1047 | pg[1] += p2[isys][1]; | |
1048 | pg[2] += p2[isys][2]; | |
1049 | pg[3] += p2[isys][3]; | |
0f482ae4 | 1050 | } else { |
1051 | // | |
1052 | // Split gluon in rest frame. | |
1053 | // | |
4e383037 | 1054 | Double_t bx = p2[isys][0] / p2[isys][3]; |
1055 | Double_t by = p2[isys][1] / p2[isys][3]; | |
1056 | Double_t bz = p2[isys][2] / p2[isys][3]; | |
1057 | Double_t pst = p2[isys][4] / 2.; | |
0f482ae4 | 1058 | // |
1059 | // Isotropic decay ???? | |
1060 | Double_t cost = 2. * gRandom->Rndm() - 1.; | |
1061 | Double_t sint = TMath::Sqrt(1. - cost * cost); | |
1062 | Double_t phi = 2. * TMath::Pi() * gRandom->Rndm(); | |
1063 | ||
1064 | Double_t pz1 = pst * cost; | |
1065 | Double_t pz2 = -pst * cost; | |
1066 | Double_t pt1 = pst * sint; | |
1067 | Double_t pt2 = -pst * sint; | |
1068 | Double_t px1 = pt1 * TMath::Cos(phi); | |
1069 | Double_t py1 = pt1 * TMath::Sin(phi); | |
1070 | Double_t px2 = pt2 * TMath::Cos(phi); | |
1071 | Double_t py2 = pt2 * TMath::Sin(phi); | |
1072 | ||
1073 | fPyjets->P[0][iGlu] = px1; | |
1074 | fPyjets->P[1][iGlu] = py1; | |
1075 | fPyjets->P[2][iGlu] = pz1; | |
1076 | fPyjets->P[3][iGlu] = pst; | |
1077 | fPyjets->P[4][iGlu] = 0.; | |
1078 | ||
4e383037 | 1079 | fPyjets->K[0][iGlu] = 1 ; |
0f482ae4 | 1080 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 1081 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1082 | fPyjets->K[3][iGlu] = -1; |
1083 | fPyjets->K[4][iGlu] = -1; | |
1084 | ||
1085 | fPyjets->P[0][iGlu+1] = px2; | |
1086 | fPyjets->P[1][iGlu+1] = py2; | |
1087 | fPyjets->P[2][iGlu+1] = pz2; | |
1088 | fPyjets->P[3][iGlu+1] = pst; | |
1089 | fPyjets->P[4][iGlu+1] = 0.; | |
1090 | ||
4e383037 | 1091 | fPyjets->K[0][iGlu+1] = 1; |
1092 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1; | |
0f482ae4 | 1093 | fPyjets->K[1][iGlu+1] = 21; |
4e383037 | 1094 | fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1095 | fPyjets->K[3][iGlu+1] = -1; |
1096 | fPyjets->K[4][iGlu+1] = -1; | |
1097 | SetMSTU(1,0); | |
1098 | SetMSTU(2,0); | |
1099 | // | |
1100 | // Boost back | |
1101 | // | |
1102 | Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz); | |
1103 | } | |
4e383037 | 1104 | /* |
1105 | for (Int_t ig = iGlu; ig < iGlu+ish; ig++) { | |
1106 | Double_t px, py, pz; | |
1107 | px = fPyjets->P[0][ig]; | |
1108 | py = fPyjets->P[1][ig]; | |
1109 | pz = fPyjets->P[2][ig]; | |
1110 | TVector3 v(px, py, pz); | |
1111 | v.RotateZ(-phiq[isys]); | |
1112 | v.RotateY(-thetaq[isys]); | |
1113 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z(); | |
1114 | Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1115 | Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r)); | |
1116 | if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.); | |
1117 | Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1118 | pxs += jtKick * TMath::Cos(phiKick); | |
1119 | pys += jtKick * TMath::Sin(phiKick); | |
1120 | TVector3 w(pxs, pys, pzs); | |
1121 | w.RotateY(thetaq[isys]); | |
1122 | w.RotateZ(phiq[isys]); | |
1123 | fPyjets->P[0][ig] = w.X(); | |
1124 | fPyjets->P[1][ig] = w.Y(); | |
1125 | fPyjets->P[2][ig] = w.Z(); | |
1126 | fPyjets->P[2][ig] = w.Mag(); | |
1127 | } | |
1128 | */ | |
1129 | } // kGluon | |
1130 | ||
6e90ad26 | 1131 | |
4e383037 | 1132 | // Check energy conservation |
0f482ae4 | 1133 | Double_t pxs = 0.; |
1134 | Double_t pys = 0.; | |
1135 | Double_t pzs = 0.; | |
1136 | Double_t es = 14000.; | |
1137 | ||
1138 | for (Int_t i = 0; i < numpart; i++) | |
1139 | { | |
1140 | kst = fPyjets->K[0][i]; | |
1141 | if (kst != 1 && kst != 2) continue; | |
1142 | pxs += fPyjets->P[0][i]; | |
1143 | pys += fPyjets->P[1][i]; | |
1144 | pzs += fPyjets->P[2][i]; | |
1145 | es -= fPyjets->P[3][i]; | |
1146 | } | |
1147 | if (TMath::Abs(pxs) > 1.e-2 || | |
1148 | TMath::Abs(pys) > 1.e-2 || | |
1149 | TMath::Abs(pzs) > 1.e-1) { | |
1150 | printf("%e %e %e %e\n", pxs, pys, pzs, es); | |
4e383037 | 1151 | // Fatal("Quench()", "4-Momentum non-conservation"); |
452af8c7 | 1152 | } |
4e383037 | 1153 | |
1154 | } // end quenching loop (systems) | |
6e90ad26 | 1155 | // Clean-up |
0f482ae4 | 1156 | for (Int_t i = 0; i < numpart; i++) |
1157 | { | |
4e383037 | 1158 | imo = fPyjets->K[2][i]; |
1159 | if (imo > 1000) { | |
1160 | fPyjets->K[2][i] = fPyjets->K[2][i] % 1000; | |
1161 | } | |
0f482ae4 | 1162 | } |
4e383037 | 1163 | // this->Pylist(1); |
0f482ae4 | 1164 | } // end quench |
90d7b703 | 1165 |