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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 | ||
235 | break; | |
adf4d898 | 236 | case kPyCharmpPbMNR: |
237 | case kPyD0pPbMNR: | |
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 p-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(91,1.16); | |
268 | SetPARP(93,5.8); | |
269 | ||
270 | // Set c-quark mass | |
271 | SetPMAS(4,1,1.2); | |
272 | ||
273 | break; | |
274 | case kPyCharmppMNR: | |
275 | case kPyD0ppMNR: | |
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 pp 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^2> | |
304 | SetMSTP(91,1); | |
305 | SetPARP(91,1.); | |
306 | SetPARP(93,5.); | |
307 | ||
308 | // Set c-quark mass | |
309 | SetPMAS(4,1,1.2); | |
310 | ||
311 | break; | |
312 | case kPyBeautyPbPbMNR: | |
8d2cd130 | 313 | // Tuning of Pythia parameters aimed to get a resonable agreement |
314 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
315 | // b-bbar single inclusive and double differential distributions. | |
316 | // This parameter settings are meant to work with Pb-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 2.75GeV. Example in ConfigBeautyPPR.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 | SetPARP(67,1.0); | |
340 | SetPARP(71,1.0); | |
341 | ||
adf4d898 | 342 | // Intrinsic <kT> |
8d2cd130 | 343 | SetMSTP(91,1); |
344 | SetPARP(91,2.035); | |
345 | SetPARP(93,10.17); | |
346 | ||
347 | // Set b-quark mass | |
348 | SetPMAS(5,1,4.75); | |
349 | ||
adf4d898 | 350 | break; |
351 | case kPyBeautypPbMNR: | |
352 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
353 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
354 | // b-bbar single inclusive and double differential distributions. | |
355 | // This parameter settings are meant to work with p-Pb collisions | |
356 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
357 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
358 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
359 | ||
360 | // All QCD processes | |
361 | SetMSEL(1); | |
362 | ||
363 | // No multiple interactions | |
364 | SetMSTP(81,0); | |
365 | SetPARP(81,0.0); | |
366 | SetPARP(82,0.0); | |
367 | ||
368 | // Initial/final parton shower on (Pythia default) | |
369 | SetMSTP(61,1); | |
370 | SetMSTP(71,1); | |
371 | ||
372 | // 2nd order alpha_s | |
373 | SetMSTP(2,2); | |
374 | ||
375 | // QCD scales | |
376 | SetMSTP(32,2); | |
377 | SetPARP(34,1.0); | |
378 | SetPARP(67,1.0); | |
379 | SetPARP(71,1.0); | |
380 | ||
381 | // Intrinsic <kT> | |
382 | SetMSTP(91,1); | |
383 | SetPARP(91,1.60); | |
384 | SetPARP(93,8.00); | |
385 | ||
386 | // Set b-quark mass | |
387 | SetPMAS(5,1,4.75); | |
388 | ||
389 | break; | |
390 | case kPyBeautyppMNR: | |
391 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
392 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
393 | // b-bbar single inclusive and double differential distributions. | |
394 | // This parameter settings are meant to work with pp collisions | |
395 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
396 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
397 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
398 | ||
399 | // All QCD processes | |
400 | SetMSEL(1); | |
401 | ||
402 | // No multiple interactions | |
403 | SetMSTP(81,0); | |
404 | SetPARP(81,0.0); | |
405 | SetPARP(82,0.0); | |
406 | ||
407 | // Initial/final parton shower on (Pythia default) | |
408 | SetMSTP(61,1); | |
409 | SetMSTP(71,1); | |
410 | ||
411 | // 2nd order alpha_s | |
412 | SetMSTP(2,2); | |
413 | ||
414 | // QCD scales | |
415 | SetMSTP(32,2); | |
416 | SetPARP(34,1.0); | |
417 | SetPARP(67,1.0); | |
418 | SetPARP(71,1.0); | |
419 | ||
420 | // Intrinsic <kT> | |
421 | SetMSTP(91,1); | |
422 | SetPARP(91,1.); | |
423 | SetPARP(93,5.); | |
424 | ||
425 | // Set b-quark mass | |
426 | SetPMAS(5,1,4.75); | |
427 | ||
8d2cd130 | 428 | break; |
429 | } | |
430 | // | |
431 | // Initialize PYTHIA | |
432 | SetMSTP(41,1); // all resonance decays switched on | |
433 | ||
434 | Initialize("CMS","p","p",fEcms); | |
435 | ||
436 | } | |
437 | ||
438 | Int_t AliPythia::CheckedLuComp(Int_t kf) | |
439 | { | |
440 | // Check Lund particle code (for debugging) | |
441 | Int_t kc=Pycomp(kf); | |
442 | printf("\n Lucomp kf,kc %d %d",kf,kc); | |
443 | return kc; | |
444 | } | |
445 | ||
446 | void AliPythia::SetNuclei(Int_t a1, Int_t a2) | |
447 | { | |
448 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
449 | // The MSTP array in the PYPARS common block is used to enable and | |
450 | // select the nuclear structure functions. | |
451 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
452 | // =1: internal PYTHIA acording to MSTP(51) | |
453 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
454 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
455 | // MSTP(192) : Mass number of nucleus side 1 | |
456 | // MSTP(193) : Mass number of nucleus side 2 | |
457 | SetMSTP(52,2); | |
458 | SetMSTP(192, a1); | |
459 | SetMSTP(193, a2); | |
460 | } | |
461 | ||
462 | ||
463 | AliPythia* AliPythia::Instance() | |
464 | { | |
465 | // Set random number generator | |
466 | if (fgAliPythia) { | |
467 | return fgAliPythia; | |
468 | } else { | |
469 | fgAliPythia = new AliPythia(); | |
470 | return fgAliPythia; | |
471 | } | |
472 | } | |
473 | ||
474 | void AliPythia::PrintParticles() | |
475 | { | |
476 | // Print list of particl properties | |
477 | Int_t np = 0; | |
c31f1d37 | 478 | char* name = new char[16]; |
8d2cd130 | 479 | for (Int_t kf=0; kf<1000000; kf++) { |
480 | for (Int_t c = 1; c > -2; c-=2) { | |
8d2cd130 | 481 | Int_t kc = Pycomp(c*kf); |
482 | if (kc) { | |
483 | Float_t mass = GetPMAS(kc,1); | |
484 | Float_t width = GetPMAS(kc,2); | |
485 | Float_t tau = GetPMAS(kc,4); | |
c31f1d37 | 486 | |
8d2cd130 | 487 | Pyname(kf,name); |
488 | ||
489 | np++; | |
490 | ||
491 | printf("\n mass, width, tau: %6d %s %10.3f %10.3e %10.3e", | |
492 | c*kf, name, mass, width, tau); | |
493 | } | |
494 | } | |
495 | } | |
496 | printf("\n Number of particles %d \n \n", np); | |
497 | } | |
498 | ||
499 | void AliPythia::ResetDecayTable() | |
500 | { | |
501 | // Set default values for pythia decay switches | |
502 | Int_t i; | |
503 | for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
504 | for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
505 | } | |
506 | ||
507 | void AliPythia::SetDecayTable() | |
508 | { | |
509 | // Set default values for pythia decay switches | |
510 | // | |
511 | Int_t i; | |
512 | for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
513 | for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
514 | } | |
515 | ||
516 | void AliPythia::Pyclus(Int_t& njet) | |
517 | { | |
518 | // Call Pythia clustering algorithm | |
519 | // | |
520 | pyclus(njet); | |
521 | } | |
522 | ||
523 | void AliPythia::Pycell(Int_t& njet) | |
524 | { | |
525 | // Call Pythia jet reconstruction algorithm | |
526 | // | |
527 | pycell(njet); | |
528 | } | |
529 | ||
452af8c7 | 530 | void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax) |
531 | { | |
532 | // Call Pythia jet reconstruction algorithm | |
533 | // | |
452af8c7 | 534 | pyshow(ip1, ip2, qmax); |
535 | } | |
536 | ||
537 | void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez) | |
538 | { | |
539 | pyrobo(imi, ima, the, phi, bex, bey, bez); | |
540 | } | |
541 | ||
542 | ||
543 | ||
0f482ae4 | 544 | void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t qTransport, Float_t maxLength, Int_t iECMethod) |
545 | { | |
546 | // Initializes | |
547 | // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann | |
548 | // (2) The nuclear geometry using the Glauber Model | |
549 | // | |
550 | ||
551 | ||
552 | fGlauber = new AliFastGlauber(); | |
553 | fGlauber->Init(2); | |
554 | fGlauber->SetCentralityClass(cMin, cMax); | |
555 | ||
556 | fQuenchingWeights = new AliQuenchingWeights(); | |
557 | fQuenchingWeights->InitMult(); | |
558 | fQuenchingWeights->SetQTransport(qTransport); | |
559 | fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod)); | |
560 | fQuenchingWeights->SetLengthMax(Int_t(maxLength)); | |
561 | fQuenchingWeights->SampleEnergyLoss(); | |
562 | ||
563 | } | |
564 | ||
565 | ||
452af8c7 | 566 | void AliPythia::Quench() |
567 | { | |
568 | // | |
569 | // | |
570 | // Simple Jet Quenching routine: | |
571 | // ============================= | |
572 | // The jet formed by all final state partons radiated by the parton created | |
0f482ae4 | 573 | // in the hard collisions is quenched by a factor (1-z) using light cone variables in |
574 | // the initial parton reference frame: | |
452af8c7 | 575 | // (E + p_z)new = (1-z) (E + p_z)old |
576 | // | |
0f482ae4 | 577 | // |
578 | // | |
579 | // | |
452af8c7 | 580 | // The lost momentum is first balanced by one gluon with virtuality > 0. |
581 | // Subsequently the gluon splits to yield two gluons with E = p. | |
582 | // | |
0f482ae4 | 583 | // |
584 | // | |
4e383037 | 585 | static Float_t eMean = 0.; |
586 | static Int_t icall = 0; | |
0f482ae4 | 587 | |
588 | Double_t p0[2][5]; | |
589 | Double_t p1[2][5]; | |
590 | Double_t p2[2][5]; | |
452af8c7 | 591 | Int_t klast[2] = {-1, -1}; |
452af8c7 | 592 | |
593 | Int_t numpart = fPyjets->N; | |
0f482ae4 | 594 | Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0.; |
595 | Double_t pxq[2], pyq[2], pzq[2], eq[2], yq[2], mq[2], pq[2], phiq[2], thetaq[2], ptq[2]; | |
596 | Bool_t quenched[2]; | |
597 | Double_t phi; | |
598 | Double_t zInitial[2], wjtKick[2]; | |
4e383037 | 599 | Int_t nGluon[2]; |
600 | ||
0f482ae4 | 601 | Int_t imo, kst, pdg; |
511db649 | 602 | // |
0f482ae4 | 603 | // Primary partons |
511db649 | 604 | // |
4e383037 | 605 | |
606 | ||
0f482ae4 | 607 | |
608 | for (Int_t i = 6; i <= 7; i++) { | |
609 | Int_t j = i - 6; | |
452af8c7 | 610 | |
0f482ae4 | 611 | pxq[j] = fPyjets->P[0][i]; |
612 | pyq[j] = fPyjets->P[1][i]; | |
613 | pzq[j] = fPyjets->P[2][i]; | |
614 | eq[j] = fPyjets->P[3][i]; | |
615 | mq[j] = fPyjets->P[4][i]; | |
4e383037 | 616 | yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14)); |
0f482ae4 | 617 | pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]); |
618 | phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]); | |
619 | ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]); | |
620 | thetaq[j] = TMath::ATan2(ptq[j], pzq[j]); | |
621 | phi = phiq[j]; | |
622 | ||
623 | // Quench only central jets | |
624 | if (TMath::Abs(yq[j]) > 2.5) { | |
625 | zInitial[j] = 0.; | |
626 | } else { | |
627 | pdg = fPyjets->K[1][i]; | |
628 | ||
629 | // Get length in nucleus | |
630 | Double_t l; | |
631 | fGlauber->GetLengthsForPythia(1, &phi, &l, -1.); | |
632 | // | |
633 | // Energy loss for given length and parton typr | |
634 | Int_t itype = (pdg == 21) ? 2 : 1; | |
4e383037 | 635 | |
0f482ae4 | 636 | Double_t eloss = fQuenchingWeights->GetELossRandom(itype, l, eq[j]); |
4e383037 | 637 | if (eq[j] > 80. && TMath::Abs(yq[j]) < 0.5) { |
638 | icall ++; | |
639 | eMean += eloss; | |
640 | } | |
641 | ||
0f482ae4 | 642 | // |
643 | // Extra pt | |
4e383037 | 644 | |
0f482ae4 | 645 | wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->GetQTransport()); |
646 | // | |
647 | // Fractional energy loss | |
648 | zInitial[j] = eloss / eq[j]; | |
649 | // | |
650 | // Avoid complete loss | |
651 | // | |
652 | if (zInitial[j] == 1.) zInitial[j] = 0.95; | |
653 | // | |
654 | // Some debug printing | |
4e383037 | 655 | 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", |
656 | j, itype, eq[j], phi, l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]); | |
657 | ||
658 | zInitial[j] = 1.; | |
659 | while (zInitial[j] >= 0.95) zInitial[j] = gRandom->Exp(0.2); | |
0f482ae4 | 660 | } |
4e383037 | 661 | |
0f482ae4 | 662 | quenched[j] = (zInitial[j] > 0.01); |
4e383037 | 663 | } // primary partons |
0f482ae4 | 664 | |
6e90ad26 | 665 | Double_t pNew[1000][4]; |
666 | Int_t kNew[1000]; | |
667 | Int_t icount = 0; | |
668 | // | |
4e383037 | 669 | // System Loop |
670 | for (Int_t isys = 0; isys < 2; isys++) { | |
6e90ad26 | 671 | // Skip to next system if not quenched. |
4e383037 | 672 | if (!quenched[isys]) continue; |
673 | ||
674 | nGluon[isys] = 1 + Int_t(zInitial[isys] / (1. - zInitial[isys])); | |
675 | if (nGluon[isys] > 6) nGluon[isys] = 6; | |
676 | zInitial[isys] = 1. - TMath::Power(1. - zInitial[isys], 1./Double_t(nGluon[isys])); | |
677 | wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys])); | |
0f482ae4 | 678 | |
4e383037 | 679 | |
680 | ||
681 | Int_t igMin = -1; | |
682 | Int_t igMax = -1; | |
683 | Double_t pg[4] = {0., 0., 0., 0.}; | |
684 | ||
685 | // | |
686 | // Loop on radiation events | |
687 | ||
688 | for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) { | |
6e90ad26 | 689 | Double_t zHeavy = zInitial[isys]; |
6e90ad26 | 690 | // |
4e383037 | 691 | |
6e90ad26 | 692 | while (1) { |
693 | icount = 0; | |
694 | for (Int_t k = 0; k < 4; k++) | |
695 | { | |
696 | p0[isys][k] = 0.; | |
697 | p1[isys][k] = 0.; | |
698 | p2[isys][k] = 0.; | |
699 | } | |
700 | // Loop over partons | |
701 | for (Int_t i = 0; i < numpart; i++) | |
702 | { | |
703 | imo = fPyjets->K[2][i]; | |
704 | kst = fPyjets->K[0][i]; | |
705 | pdg = fPyjets->K[1][i]; | |
706 | ||
707 | ||
708 | ||
0f482ae4 | 709 | // Quarks and gluons only |
6e90ad26 | 710 | if (pdg != 21 && TMath::Abs(pdg) > 6) continue; |
0f482ae4 | 711 | // Particles from hard scattering only |
6e90ad26 | 712 | if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1]; |
4e383037 | 713 | if (imo != (isys + 7) && (imo % 1000) != (isys + 7)) continue; |
6e90ad26 | 714 | |
0f482ae4 | 715 | // Skip comment lines |
6e90ad26 | 716 | if (kst != 1 && kst != 2) continue; |
0f482ae4 | 717 | // |
718 | // Parton kinematic | |
6e90ad26 | 719 | px = fPyjets->P[0][i]; |
720 | py = fPyjets->P[1][i]; | |
721 | pz = fPyjets->P[2][i]; | |
722 | e = fPyjets->P[3][i]; | |
723 | m = fPyjets->P[4][i]; | |
724 | pt = TMath::Sqrt(px * px + py * py); | |
725 | p = TMath::Sqrt(px * px + py * py + pz * pz); | |
726 | phi = TMath::Pi() + TMath::ATan2(-py, -px); | |
727 | theta = TMath::ATan2(pt, pz); | |
728 | ||
0f482ae4 | 729 | // |
730 | // Save 4-momentum sum for balancing | |
6e90ad26 | 731 | Int_t index = imo - 7; |
4e383037 | 732 | if (index >= 1000) index = imo % 1000 - 7; |
6e90ad26 | 733 | |
734 | p0[index][0] += px; | |
735 | p0[index][1] += py; | |
736 | p0[index][2] += pz; | |
737 | p0[index][3] += e; | |
6e90ad26 | 738 | |
739 | klast[index] = i; | |
740 | ||
0f482ae4 | 741 | // |
742 | // Fractional energy loss | |
6e90ad26 | 743 | Double_t z = zInitial[index]; |
4e383037 | 744 | |
745 | // Don't fully quench radiated gluons | |
746 | // | |
747 | if (imo > 1000) { | |
748 | // This small factor makes sure that the gluons are not too close in phase space to avoid recombination | |
749 | // | |
750 | ||
751 | z = 0.05; | |
752 | } | |
753 | ||
754 | // | |
755 | ||
6e90ad26 | 756 | if (m > 0.) z = zHeavy; |
757 | ||
758 | // | |
759 | // | |
760 | // Transform into frame in which initial parton is along z-axis | |
761 | // | |
762 | TVector3 v(px, py, pz); | |
763 | v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]); | |
764 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z(); | |
765 | ||
766 | Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys); | |
767 | Double_t mt2 = jt * jt + m * m; | |
768 | Double_t zmax = 1.; | |
769 | // | |
770 | // Kinematic limit on z | |
771 | // | |
4e383037 | 772 | if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt); |
6e90ad26 | 773 | // |
774 | // Change light-cone kinematics rel. to initial parton | |
775 | // | |
776 | Double_t eppzOld = e + pl; | |
777 | Double_t empzOld = e - pl; | |
778 | ||
779 | Double_t eppzNew = (1. - z) * eppzOld; | |
780 | Double_t empzNew = empzOld - mt2 * z / eppzOld; | |
781 | Double_t eNew = 0.5 * (eppzNew + empzNew); | |
782 | Double_t plNew = 0.5 * (eppzNew - empzNew); | |
783 | ||
784 | Double_t jtNew; | |
785 | // | |
786 | // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0 | |
787 | Double_t mt2New = eppzNew * empzNew; | |
788 | if (mt2New < 1.e-8) mt2New = 0.; | |
4e383037 | 789 | if (z < zmax) { |
790 | if (m * m > mt2New) { | |
791 | // | |
792 | // This should not happen | |
793 | // | |
794 | Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew); | |
795 | jtNew = 0; | |
796 | } else { | |
797 | jtNew = TMath::Sqrt(mt2New - m * m); | |
798 | } | |
6e90ad26 | 799 | } else { |
4e383037 | 800 | // If pT is to small (probably a leading massive particle) we scale only the energy |
801 | // This can cause negative masses of the radiated gluon | |
802 | // Let's hope for the best ... | |
803 | jtNew = jt; | |
804 | eNew = TMath::Sqrt(plNew * plNew + mt2); | |
805 | ||
6e90ad26 | 806 | } |
6e90ad26 | 807 | // |
808 | // Calculate new px, py | |
809 | // | |
810 | Double_t pxNew = jtNew / jt * pxs; | |
811 | Double_t pyNew = jtNew / jt * pys; | |
812 | ||
813 | // Double_t dpx = pxs - pxNew; | |
814 | // Double_t dpy = pys - pyNew; | |
815 | // Double_t dpz = pl - plNew; | |
816 | // Double_t de = e - eNew; | |
817 | // Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz; | |
818 | // printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew); | |
819 | // printf("New mass (2) %e %e \n", pxNew, pyNew); | |
820 | // | |
821 | // Rotate back | |
822 | // | |
823 | TVector3 w(pxNew, pyNew, plNew); | |
824 | w.RotateY(thetaq[index]); w.RotateZ(phiq[index]); | |
825 | pxNew = w.X(); pyNew = w.Y(); plNew = w.Z(); | |
826 | ||
827 | p1[index][0] += pxNew; | |
828 | p1[index][1] += pyNew; | |
829 | p1[index][2] += plNew; | |
830 | p1[index][3] += eNew; | |
831 | // | |
832 | // Updated 4-momentum vectors | |
833 | // | |
834 | pNew[icount][0] = pxNew; | |
835 | pNew[icount][1] = pyNew; | |
836 | pNew[icount][2] = plNew; | |
837 | pNew[icount][3] = eNew; | |
838 | kNew[icount] = i; | |
839 | icount++; | |
840 | } // parton loop | |
0f482ae4 | 841 | // |
6e90ad26 | 842 | // Check if there was phase-space for quenching |
0f482ae4 | 843 | // |
0f482ae4 | 844 | |
6e90ad26 | 845 | if (icount == 0) quenched[isys] = kFALSE; |
846 | if (!quenched[isys]) break; | |
847 | ||
848 | for (Int_t j = 0; j < 4; j++) | |
849 | { | |
850 | p2[isys][j] = p0[isys][j] - p1[isys][j]; | |
851 | } | |
852 | 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 | 853 | if (p2[isys][4] > 0.) { |
854 | p2[isys][4] = TMath::Sqrt(p2[isys][4]); | |
855 | break; | |
856 | } else { | |
857 | printf("Warning negative mass squared in system %d %f ! \n", isys, zInitial[isys]); | |
4e383037 | 858 | 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 | 859 | if (p2[isys][4] < -0.01) { |
4e383037 | 860 | printf("Negative mass squared !\n"); |
861 | // Here we have to put the gluon back to mass shell | |
862 | // This will lead to a small energy imbalance | |
863 | p2[isys][4] = 0.; | |
864 | p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]); | |
865 | break; | |
6e90ad26 | 866 | } else { |
867 | p2[isys][4] = 0.; | |
868 | break; | |
869 | } | |
870 | } | |
6e90ad26 | 871 | /* |
6e90ad26 | 872 | zHeavy *= 0.98; |
873 | printf("zHeavy lowered to %f\n", zHeavy); | |
874 | if (zHeavy < 0.01) { | |
875 | printf("No success ! \n"); | |
876 | icount = 0; | |
877 | quenched[isys] = kFALSE; | |
878 | break; | |
879 | } | |
4e383037 | 880 | */ |
881 | } // iteration on z (while) | |
882 | ||
6e90ad26 | 883 | // Update event record |
884 | for (Int_t k = 0; k < icount; k++) { | |
885 | // 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] ); | |
886 | fPyjets->P[0][kNew[k]] = pNew[k][0]; | |
887 | fPyjets->P[1][kNew[k]] = pNew[k][1]; | |
888 | fPyjets->P[2][kNew[k]] = pNew[k][2]; | |
889 | fPyjets->P[3][kNew[k]] = pNew[k][3]; | |
0f482ae4 | 890 | } |
4e383037 | 891 | // |
892 | // Add the gluons | |
893 | // | |
894 | Int_t ish = 0; | |
1837e95c | 895 | Int_t iGlu; |
4e383037 | 896 | if (!quenched[isys]) continue; |
0f482ae4 | 897 | // |
898 | // Last parton from shower i | |
4e383037 | 899 | Int_t in = klast[isys]; |
0f482ae4 | 900 | // |
901 | // Continue if no parton in shower i selected | |
902 | if (in == -1) continue; | |
903 | // | |
904 | // If this is the second initial parton and it is behind the first move pointer by previous ish | |
4e383037 | 905 | if (isys == 1 && klast[1] > klast[0]) in += ish; |
0f482ae4 | 906 | // |
907 | // Starting index | |
452af8c7 | 908 | |
4e383037 | 909 | // jmin = in - 1; |
0f482ae4 | 910 | // How many additional gluons will be generated |
911 | ish = 1; | |
4e383037 | 912 | if (p2[isys][4] > 0.05) ish = 2; |
0f482ae4 | 913 | // |
914 | // Position of gluons | |
4e383037 | 915 | iGlu = numpart; |
916 | if (iglu == 0) igMin = iGlu; | |
917 | igMax = iGlu; | |
0f482ae4 | 918 | numpart += ish; |
919 | (fPyjets->N) += ish; | |
4e383037 | 920 | |
0f482ae4 | 921 | if (ish == 1) { |
4e383037 | 922 | fPyjets->P[0][iGlu] = p2[isys][0]; |
923 | fPyjets->P[1][iGlu] = p2[isys][1]; | |
924 | fPyjets->P[2][iGlu] = p2[isys][2]; | |
925 | fPyjets->P[3][iGlu] = p2[isys][3]; | |
926 | fPyjets->P[4][iGlu] = p2[isys][4]; | |
0f482ae4 | 927 | |
4e383037 | 928 | fPyjets->K[0][iGlu] = 1; |
929 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1; | |
0f482ae4 | 930 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 931 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 932 | fPyjets->K[3][iGlu] = -1; |
933 | fPyjets->K[4][iGlu] = -1; | |
4e383037 | 934 | |
935 | pg[0] += p2[isys][0]; | |
936 | pg[1] += p2[isys][1]; | |
937 | pg[2] += p2[isys][2]; | |
938 | pg[3] += p2[isys][3]; | |
0f482ae4 | 939 | } else { |
940 | // | |
941 | // Split gluon in rest frame. | |
942 | // | |
4e383037 | 943 | Double_t bx = p2[isys][0] / p2[isys][3]; |
944 | Double_t by = p2[isys][1] / p2[isys][3]; | |
945 | Double_t bz = p2[isys][2] / p2[isys][3]; | |
946 | Double_t pst = p2[isys][4] / 2.; | |
0f482ae4 | 947 | // |
948 | // Isotropic decay ???? | |
949 | Double_t cost = 2. * gRandom->Rndm() - 1.; | |
950 | Double_t sint = TMath::Sqrt(1. - cost * cost); | |
951 | Double_t phi = 2. * TMath::Pi() * gRandom->Rndm(); | |
952 | ||
953 | Double_t pz1 = pst * cost; | |
954 | Double_t pz2 = -pst * cost; | |
955 | Double_t pt1 = pst * sint; | |
956 | Double_t pt2 = -pst * sint; | |
957 | Double_t px1 = pt1 * TMath::Cos(phi); | |
958 | Double_t py1 = pt1 * TMath::Sin(phi); | |
959 | Double_t px2 = pt2 * TMath::Cos(phi); | |
960 | Double_t py2 = pt2 * TMath::Sin(phi); | |
961 | ||
962 | fPyjets->P[0][iGlu] = px1; | |
963 | fPyjets->P[1][iGlu] = py1; | |
964 | fPyjets->P[2][iGlu] = pz1; | |
965 | fPyjets->P[3][iGlu] = pst; | |
966 | fPyjets->P[4][iGlu] = 0.; | |
967 | ||
4e383037 | 968 | fPyjets->K[0][iGlu] = 1 ; |
0f482ae4 | 969 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 970 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 971 | fPyjets->K[3][iGlu] = -1; |
972 | fPyjets->K[4][iGlu] = -1; | |
973 | ||
974 | fPyjets->P[0][iGlu+1] = px2; | |
975 | fPyjets->P[1][iGlu+1] = py2; | |
976 | fPyjets->P[2][iGlu+1] = pz2; | |
977 | fPyjets->P[3][iGlu+1] = pst; | |
978 | fPyjets->P[4][iGlu+1] = 0.; | |
979 | ||
4e383037 | 980 | fPyjets->K[0][iGlu+1] = 1; |
981 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1; | |
0f482ae4 | 982 | fPyjets->K[1][iGlu+1] = 21; |
4e383037 | 983 | fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 984 | fPyjets->K[3][iGlu+1] = -1; |
985 | fPyjets->K[4][iGlu+1] = -1; | |
986 | SetMSTU(1,0); | |
987 | SetMSTU(2,0); | |
988 | // | |
989 | // Boost back | |
990 | // | |
991 | Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz); | |
992 | } | |
4e383037 | 993 | /* |
994 | for (Int_t ig = iGlu; ig < iGlu+ish; ig++) { | |
995 | Double_t px, py, pz; | |
996 | px = fPyjets->P[0][ig]; | |
997 | py = fPyjets->P[1][ig]; | |
998 | pz = fPyjets->P[2][ig]; | |
999 | TVector3 v(px, py, pz); | |
1000 | v.RotateZ(-phiq[isys]); | |
1001 | v.RotateY(-thetaq[isys]); | |
1002 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z(); | |
1003 | Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1004 | Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r)); | |
1005 | if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.); | |
1006 | Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1007 | pxs += jtKick * TMath::Cos(phiKick); | |
1008 | pys += jtKick * TMath::Sin(phiKick); | |
1009 | TVector3 w(pxs, pys, pzs); | |
1010 | w.RotateY(thetaq[isys]); | |
1011 | w.RotateZ(phiq[isys]); | |
1012 | fPyjets->P[0][ig] = w.X(); | |
1013 | fPyjets->P[1][ig] = w.Y(); | |
1014 | fPyjets->P[2][ig] = w.Z(); | |
1015 | fPyjets->P[2][ig] = w.Mag(); | |
1016 | } | |
1017 | */ | |
1018 | } // kGluon | |
1019 | ||
6e90ad26 | 1020 | |
4e383037 | 1021 | // Check energy conservation |
0f482ae4 | 1022 | Double_t pxs = 0.; |
1023 | Double_t pys = 0.; | |
1024 | Double_t pzs = 0.; | |
1025 | Double_t es = 14000.; | |
1026 | ||
1027 | for (Int_t i = 0; i < numpart; i++) | |
1028 | { | |
1029 | kst = fPyjets->K[0][i]; | |
1030 | if (kst != 1 && kst != 2) continue; | |
1031 | pxs += fPyjets->P[0][i]; | |
1032 | pys += fPyjets->P[1][i]; | |
1033 | pzs += fPyjets->P[2][i]; | |
1034 | es -= fPyjets->P[3][i]; | |
1035 | } | |
1036 | if (TMath::Abs(pxs) > 1.e-2 || | |
1037 | TMath::Abs(pys) > 1.e-2 || | |
1038 | TMath::Abs(pzs) > 1.e-1) { | |
1039 | printf("%e %e %e %e\n", pxs, pys, pzs, es); | |
4e383037 | 1040 | // Fatal("Quench()", "4-Momentum non-conservation"); |
452af8c7 | 1041 | } |
4e383037 | 1042 | |
1043 | } // end quenching loop (systems) | |
6e90ad26 | 1044 | // Clean-up |
0f482ae4 | 1045 | for (Int_t i = 0; i < numpart; i++) |
1046 | { | |
4e383037 | 1047 | imo = fPyjets->K[2][i]; |
1048 | if (imo > 1000) { | |
1049 | fPyjets->K[2][i] = fPyjets->K[2][i] % 1000; | |
1050 | } | |
0f482ae4 | 1051 | } |
4e383037 | 1052 | // this->Pylist(1); |
0f482ae4 | 1053 | } // end quench |