6b435cde |
1 | |
8d2cd130 |
2 | /************************************************************************** |
3 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
4 | * * |
5 | * Author: The ALICE Off-line Project. * |
6 | * Contributors are mentioned in the code where appropriate. * |
7 | * * |
8 | * Permission to use, copy, modify and distribute this software and its * |
9 | * documentation strictly for non-commercial purposes is hereby granted * |
10 | * without fee, provided that the above copyright notice appears in all * |
11 | * copies and that both the copyright notice and this permission notice * |
12 | * appear in the supporting documentation. The authors make no claims * |
13 | * about the suitability of this software for any purpose. It is * |
14 | * provided "as is" without express or implied warranty. * |
15 | **************************************************************************/ |
16 | |
7cdba479 |
17 | /* $Id$ */ |
8d2cd130 |
18 | |
19 | #include "AliPythia.h" |
7cdba479 |
20 | #include "AliPythiaRndm.h" |
0f482ae4 |
21 | #include "../FASTSIM/AliFastGlauber.h" |
22 | #include "../FASTSIM/AliQuenchingWeights.h" |
23 | #include "TVector3.h" |
8d2cd130 |
24 | |
25 | ClassImp(AliPythia) |
26 | |
27 | #ifndef WIN32 |
28 | # define pyclus pyclus_ |
29 | # define pycell pycell_ |
452af8c7 |
30 | # define pyshow pyshow_ |
31 | # define pyrobo pyrobo_ |
992f2843 |
32 | # define pyquen pyquen_ |
16a82508 |
33 | # define pyevnw pyevnw_ |
8d2cd130 |
34 | # define type_of_call |
35 | #else |
36 | # define pyclus PYCLUS |
37 | # define pycell PYCELL |
452af8c7 |
38 | # define pyrobo PYROBO |
992f2843 |
39 | # define pyquen PYQUEN |
16a82508 |
40 | # define pyevnw PYEVNW |
8d2cd130 |
41 | # define type_of_call _stdcall |
42 | #endif |
43 | |
44 | extern "C" void type_of_call pyclus(Int_t & ); |
45 | extern "C" void type_of_call pycell(Int_t & ); |
452af8c7 |
46 | extern "C" void type_of_call pyshow(Int_t &, Int_t &, Double_t &); |
47 | extern "C" void type_of_call pyrobo(Int_t &, Int_t &, Double_t &, Double_t &, Double_t &, Double_t &, Double_t &); |
992f2843 |
48 | extern "C" void type_of_call pyquen(Double_t &, Int_t &, Double_t &); |
0a2cfc0a |
49 | extern "C" void type_of_call pyevnw(){;} |
8d2cd130 |
50 | |
51 | //_____________________________________________________________________________ |
52 | |
53 | AliPythia* AliPythia::fgAliPythia=NULL; |
54 | |
e8a8adcd |
55 | AliPythia::AliPythia(): |
56 | fProcess(kPyMb), |
57 | fEcms(0.), |
58 | fStrucFunc(kCTEQ5L), |
59 | fXJet(0.), |
60 | fYJet(0.), |
32c8e463 |
61 | fNGmax(30), |
62 | fZmax(0.97), |
e8a8adcd |
63 | fGlauber(0), |
64 | fQuenchingWeights(0) |
8d2cd130 |
65 | { |
66 | // Default Constructor |
67 | // |
68 | // Set random number |
7cdba479 |
69 | if (!AliPythiaRndm::GetPythiaRandom()) |
70 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
0f482ae4 |
71 | fGlauber = 0; |
72 | fQuenchingWeights = 0; |
8d2cd130 |
73 | } |
74 | |
e8a8adcd |
75 | AliPythia::AliPythia(const AliPythia& pythia): |
6b435cde |
76 | TPythia6(pythia), |
77 | AliRndm(pythia), |
e8a8adcd |
78 | fProcess(kPyMb), |
79 | fEcms(0.), |
80 | fStrucFunc(kCTEQ5L), |
81 | fXJet(0.), |
82 | fYJet(0.), |
32c8e463 |
83 | fNGmax(30), |
84 | fZmax(0.97), |
e8a8adcd |
85 | fGlauber(0), |
86 | fQuenchingWeights(0) |
87 | { |
88 | // Copy Constructor |
89 | pythia.Copy(*this); |
90 | } |
91 | |
8d2cd130 |
92 | void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc) |
93 | { |
94 | // Initialise the process to generate |
7cdba479 |
95 | if (!AliPythiaRndm::GetPythiaRandom()) |
96 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
97 | |
98 | fProcess = process; |
99 | fEcms = energy; |
100 | fStrucFunc = strucfunc; |
1d5b1b20 |
101 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. |
102 | SetMDCY(Pycomp(111) ,1,0); |
103 | SetMDCY(Pycomp(310) ,1,0); |
104 | SetMDCY(Pycomp(3122),1,0); |
105 | SetMDCY(Pycomp(3112),1,0); |
106 | SetMDCY(Pycomp(3212),1,0); |
107 | SetMDCY(Pycomp(3222),1,0); |
108 | SetMDCY(Pycomp(3312),1,0); |
109 | SetMDCY(Pycomp(3322),1,0); |
110 | SetMDCY(Pycomp(3334),1,0); |
1c50ec12 |
111 | // Select structure function |
8d2cd130 |
112 | SetMSTP(52,2); |
113 | SetMSTP(51,strucfunc); |
1c50ec12 |
114 | // Particles produced in string fragmentation point directly to either of the two endpoints |
115 | // of the string (depending in the side they were generated from). |
116 | SetMSTU(16,2); |
117 | |
8d2cd130 |
118 | // |
119 | // Pythia initialisation for selected processes// |
120 | // |
121 | // Make MSEL clean |
122 | // |
123 | for (Int_t i=1; i<= 200; i++) { |
124 | SetMSUB(i,0); |
125 | } |
126 | // select charm production |
127 | switch (process) |
128 | { |
65f2626c |
129 | case kPyOldUEQ2ordered: //Old underlying events with Q2 ordered QCD processes |
130 | // Multiple interactions on. |
131 | SetMSTP(81,1); |
132 | // Double Gaussian matter distribution. |
133 | SetMSTP(82,4); |
134 | SetPARP(83,0.5); |
135 | SetPARP(84,0.4); |
136 | // pT0. |
137 | SetPARP(82,2.0); |
138 | // Reference energy for pT0 and energy rescaling pace. |
139 | SetPARP(89,1800); |
140 | SetPARP(90,0.25); |
141 | // String drawing almost completely minimizes string length. |
142 | SetPARP(85,0.9); |
143 | SetPARP(86,0.95); |
144 | // ISR and FSR activity. |
145 | SetPARP(67,4); |
146 | SetPARP(71,4); |
147 | // Lambda_FSR scale. |
148 | SetPARJ(81,0.29); |
149 | break; |
150 | case kPyOldUEQ2ordered2: |
151 | // Old underlying events with Q2 ordered QCD processes |
152 | // Multiple interactions on. |
153 | SetMSTP(81,1); |
154 | // Double Gaussian matter distribution. |
155 | SetMSTP(82,4); |
156 | SetPARP(83,0.5); |
157 | SetPARP(84,0.4); |
158 | // pT0. |
159 | SetPARP(82,2.0); |
160 | // Reference energy for pT0 and energy rescaling pace. |
161 | SetPARP(89,1800); |
162 | SetPARP(90,0.16); // here is the difference with kPyOldUEQ2ordered |
163 | // String drawing almost completely minimizes string length. |
164 | SetPARP(85,0.9); |
165 | SetPARP(86,0.95); |
166 | // ISR and FSR activity. |
167 | SetPARP(67,4); |
168 | SetPARP(71,4); |
169 | // Lambda_FSR scale. |
170 | SetPARJ(81,0.29); |
171 | break; |
172 | case kPyOldPopcorn: |
173 | // Old production mechanism: Old Popcorn |
174 | SetMSEL(1); |
175 | SetMSTJ(12,3); |
176 | // (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon |
177 | SetMSTP(88,2); |
178 | // (D=1)see can be used to form baryons (BARYON JUNCTION) |
179 | SetMSTJ(1,1); |
e0e89f40 |
180 | AtlasTuning(); |
65f2626c |
181 | break; |
8d2cd130 |
182 | case kPyCharm: |
183 | SetMSEL(4); |
8d2cd130 |
184 | // heavy quark masses |
185 | |
186 | SetPMAS(4,1,1.2); |
8d2cd130 |
187 | // |
188 | // primordial pT |
189 | SetMSTP(91,1); |
190 | SetPARP(91,1.); |
191 | SetPARP(93,5.); |
192 | // |
193 | break; |
194 | case kPyBeauty: |
195 | SetMSEL(5); |
196 | SetPMAS(5,1,4.75); |
8d2cd130 |
197 | break; |
198 | case kPyJpsi: |
199 | SetMSEL(0); |
200 | // gg->J/Psi g |
201 | SetMSUB(86,1); |
202 | break; |
203 | case kPyJpsiChi: |
204 | SetMSEL(0); |
205 | // gg->J/Psi g |
206 | SetMSUB(86,1); |
207 | // gg-> chi_0c g |
208 | SetMSUB(87,1); |
209 | // gg-> chi_1c g |
210 | SetMSUB(88,1); |
211 | // gg-> chi_2c g |
212 | SetMSUB(89,1); |
213 | break; |
214 | case kPyCharmUnforced: |
215 | SetMSEL(0); |
216 | // gq->qg |
217 | SetMSUB(28,1); |
218 | // gg->qq |
219 | SetMSUB(53,1); |
220 | // gg->gg |
221 | SetMSUB(68,1); |
222 | break; |
223 | case kPyBeautyUnforced: |
224 | SetMSEL(0); |
225 | // gq->qg |
226 | SetMSUB(28,1); |
227 | // gg->qq |
228 | SetMSUB(53,1); |
229 | // gg->gg |
230 | SetMSUB(68,1); |
231 | break; |
232 | case kPyMb: |
233 | // Minimum Bias pp-Collisions |
234 | // |
235 | // |
236 | // select Pythia min. bias model |
237 | SetMSEL(0); |
511db649 |
238 | SetMSUB(92,1); // single diffraction AB-->XB |
239 | SetMSUB(93,1); // single diffraction AB-->AX |
240 | SetMSUB(94,1); // double diffraction |
241 | SetMSUB(95,1); // low pt production |
242 | |
e0e89f40 |
243 | AtlasTuning(); |
f529e69b |
244 | break; |
245 | case kPyMbDefault: |
246 | // Minimum Bias pp-Collisions |
247 | // |
248 | // |
249 | // select Pythia min. bias model |
250 | SetMSEL(0); |
251 | SetMSUB(92,1); // single diffraction AB-->XB |
252 | SetMSUB(93,1); // single diffraction AB-->AX |
253 | SetMSUB(94,1); // double diffraction |
254 | SetMSUB(95,1); // low pt production |
255 | |
0a0cbcfd |
256 | break; |
257 | case kPyLhwgMb: |
258 | // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120 |
259 | // -> Pythia 6.3 or above is needed |
260 | // |
261 | SetMSEL(0); |
262 | SetMSUB(92,1); // single diffraction AB-->XB |
263 | SetMSUB(93,1); // single diffraction AB-->AX |
264 | SetMSUB(94,1); // double diffraction |
265 | SetMSUB(95,1); // low pt production |
266 | |
267 | SetMSTP(51,kCTEQ6ll); // CTEQ6ll pdf |
268 | SetMSTP(52,2); |
269 | SetMSTP(68,1); |
270 | SetMSTP(70,2); |
271 | SetMSTP(81,1); // Multiple Interactions ON |
272 | SetMSTP(82,4); // Double Gaussian Model |
273 | SetMSTP(88,1); |
274 | |
275 | SetPARP(82,2.3); // [GeV] PT_min at Ref. energy |
276 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) |
277 | SetPARP(84,0.5); // Core radius |
278 | SetPARP(85,0.9); // Regulates gluon prod. mechanism |
279 | SetPARP(90,0.2); // 2*epsilon (exponent in power law) |
280 | |
511db649 |
281 | break; |
8d2cd130 |
282 | case kPyMbNonDiffr: |
283 | // Minimum Bias pp-Collisions |
284 | // |
285 | // |
286 | // select Pythia min. bias model |
287 | SetMSEL(0); |
511db649 |
288 | SetMSUB(95,1); // low pt production |
0f482ae4 |
289 | |
d7de4a67 |
290 | AtlasTuning(); |
291 | break; |
292 | case kPyMbMSEL1: |
293 | ConfigHeavyFlavor(); |
294 | // Intrinsic <kT^2> |
295 | SetMSTP(91,1);// Width (1=gaussian) primordial kT dist. inside hadrons |
296 | SetPARP(91,1.); // <kT^2> = PARP(91,1.)^2 |
297 | SetPARP(93,5.); // Upper cut-off |
298 | // Set Q-quark mass |
299 | SetPMAS(4,1,1.2); // Charm quark mass |
300 | SetPMAS(5,1,4.78); // Beauty quark mass |
301 | SetPARP(71,4.); // Defaut value |
302 | // Atlas Tuning |
e0e89f40 |
303 | AtlasTuning(); |
8d2cd130 |
304 | break; |
305 | case kPyJets: |
306 | // |
307 | // QCD Jets |
308 | // |
309 | SetMSEL(1); |
65f2626c |
310 | // Pythia Tune A (CDF) |
311 | // |
4167b79f |
312 | SetPARP(67,2.5); // Regulates Initial State Radiation (value from best fit to D0 dijet analysis) |
65f2626c |
313 | SetMSTP(82,4); // Double Gaussian Model |
314 | SetPARP(82,2.0); // [GeV] PT_min at Ref. energy |
315 | SetPARP(84,0.4); // Core radius |
316 | SetPARP(85,0.90) ; // Regulates gluon prod. mechanism |
317 | SetPARP(86,0.95); // Regulates gluon prod. mechanism |
318 | SetPARP(89,1800.); // [GeV] Ref. energy |
319 | SetPARP(90,0.25); // 2*epsilon (exponent in power law) |
320 | break; |
8d2cd130 |
321 | case kPyDirectGamma: |
322 | SetMSEL(10); |
323 | break; |
adf4d898 |
324 | case kPyCharmPbPbMNR: |
325 | case kPyD0PbPbMNR: |
90d7b703 |
326 | case kPyDPlusPbPbMNR: |
e0e89f40 |
327 | case kPyDPlusStrangePbPbMNR: |
90d7b703 |
328 | // Tuning of Pythia parameters aimed to get a resonable agreement |
329 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
330 | // c-cbar single inclusive and double differential distributions. |
331 | // This parameter settings are meant to work with Pb-Pb collisions |
332 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
333 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
334 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. |
3dc3ec94 |
335 | ConfigHeavyFlavor(); |
90d7b703 |
336 | // Intrinsic <kT> |
337 | SetMSTP(91,1); |
338 | SetPARP(91,1.304); |
339 | SetPARP(93,6.52); |
90d7b703 |
340 | // Set c-quark mass |
341 | SetPMAS(4,1,1.2); |
8d2cd130 |
342 | break; |
adf4d898 |
343 | case kPyCharmpPbMNR: |
344 | case kPyD0pPbMNR: |
90d7b703 |
345 | case kPyDPluspPbMNR: |
e0e89f40 |
346 | case kPyDPlusStrangepPbMNR: |
90d7b703 |
347 | // Tuning of Pythia parameters aimed to get a resonable agreement |
348 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
349 | // c-cbar single inclusive and double differential distributions. |
350 | // This parameter settings are meant to work with p-Pb collisions |
351 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
352 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
353 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. |
3dc3ec94 |
354 | ConfigHeavyFlavor(); |
90d7b703 |
355 | // Intrinsic <kT> |
3dc3ec94 |
356 | SetMSTP(91,1); |
357 | SetPARP(91,1.16); |
358 | SetPARP(93,5.8); |
359 | |
90d7b703 |
360 | // Set c-quark mass |
3dc3ec94 |
361 | SetPMAS(4,1,1.2); |
adf4d898 |
362 | break; |
363 | case kPyCharmppMNR: |
364 | case kPyD0ppMNR: |
90d7b703 |
365 | case kPyDPlusppMNR: |
e0e89f40 |
366 | case kPyDPlusStrangeppMNR: |
90d7b703 |
367 | // Tuning of Pythia parameters aimed to get a resonable agreement |
368 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
369 | // c-cbar single inclusive and double differential distributions. |
370 | // This parameter settings are meant to work with pp collisions |
371 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
372 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
373 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. |
3dc3ec94 |
374 | ConfigHeavyFlavor(); |
90d7b703 |
375 | // Intrinsic <kT^2> |
3dc3ec94 |
376 | SetMSTP(91,1); |
377 | SetPARP(91,1.); |
378 | SetPARP(93,5.); |
379 | |
90d7b703 |
380 | // Set c-quark mass |
3dc3ec94 |
381 | SetPMAS(4,1,1.2); |
adf4d898 |
382 | break; |
e0e89f40 |
383 | case kPyCharmppMNRwmi: |
384 | // Tuning of Pythia parameters aimed to get a resonable agreement |
385 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
386 | // c-cbar single inclusive and double differential distributions. |
387 | // This parameter settings are meant to work with pp collisions |
388 | // and with kCTEQ5L PDFs. |
389 | // Added multiple interactions according to ATLAS tune settings. |
390 | // To get a "reasonable" agreement with MNR results, events have to be |
391 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) |
392 | // set to 2.76 GeV. |
393 | // To get a "perfect" agreement with MNR results, events have to be |
394 | // generated in four ptHard bins with the following relative |
395 | // normalizations: |
396 | // 2.76-3 GeV: 25% |
397 | // 3-4 GeV: 40% |
398 | // 4-8 GeV: 29% |
399 | // >8 GeV: 6% |
400 | ConfigHeavyFlavor(); |
401 | // Intrinsic <kT^2> |
402 | SetMSTP(91,1); |
403 | SetPARP(91,1.); |
404 | SetPARP(93,5.); |
405 | |
406 | // Set c-quark mass |
407 | SetPMAS(4,1,1.2); |
408 | AtlasTuning(); |
409 | break; |
adf4d898 |
410 | case kPyBeautyPbPbMNR: |
8d2cd130 |
411 | // Tuning of Pythia parameters aimed to get a resonable agreement |
412 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
413 | // b-bbar single inclusive and double differential distributions. |
414 | // This parameter settings are meant to work with Pb-Pb collisions |
415 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
416 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
417 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. |
3dc3ec94 |
418 | ConfigHeavyFlavor(); |
8d2cd130 |
419 | // QCD scales |
3dc3ec94 |
420 | SetPARP(67,1.0); |
421 | SetPARP(71,1.0); |
adf4d898 |
422 | // Intrinsic <kT> |
3dc3ec94 |
423 | SetMSTP(91,1); |
424 | SetPARP(91,2.035); |
425 | SetPARP(93,10.17); |
8d2cd130 |
426 | // Set b-quark mass |
3dc3ec94 |
427 | SetPMAS(5,1,4.75); |
adf4d898 |
428 | break; |
429 | case kPyBeautypPbMNR: |
430 | // Tuning of Pythia parameters aimed to get a resonable agreement |
431 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
432 | // b-bbar single inclusive and double differential distributions. |
433 | // This parameter settings are meant to work with p-Pb collisions |
434 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
435 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
436 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. |
3dc3ec94 |
437 | ConfigHeavyFlavor(); |
adf4d898 |
438 | // QCD scales |
3dc3ec94 |
439 | SetPARP(67,1.0); |
440 | SetPARP(71,1.0); |
adf4d898 |
441 | // Intrinsic <kT> |
3dc3ec94 |
442 | SetMSTP(91,1); |
443 | SetPARP(91,1.60); |
444 | SetPARP(93,8.00); |
adf4d898 |
445 | // Set b-quark mass |
3dc3ec94 |
446 | SetPMAS(5,1,4.75); |
adf4d898 |
447 | break; |
448 | case kPyBeautyppMNR: |
449 | // Tuning of Pythia parameters aimed to get a resonable agreement |
450 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
451 | // b-bbar single inclusive and double differential distributions. |
452 | // This parameter settings are meant to work with pp collisions |
453 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. |
454 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) |
455 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. |
3dc3ec94 |
456 | ConfigHeavyFlavor(); |
adf4d898 |
457 | // QCD scales |
3dc3ec94 |
458 | SetPARP(67,1.0); |
459 | SetPARP(71,1.0); |
460 | |
461 | // Intrinsic <kT> |
462 | SetMSTP(91,1); |
463 | SetPARP(91,1.); |
464 | SetPARP(93,5.); |
465 | |
466 | // Set b-quark mass |
467 | SetPMAS(5,1,4.75); |
8d2cd130 |
468 | break; |
e0e89f40 |
469 | case kPyBeautyppMNRwmi: |
470 | // Tuning of Pythia parameters aimed to get a resonable agreement |
471 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the |
472 | // b-bbar single inclusive and double differential distributions. |
473 | // This parameter settings are meant to work with pp collisions |
474 | // and with kCTEQ5L PDFs. |
475 | // Added multiple interactions according to ATLAS tune settings. |
476 | // To get a "reasonable" agreement with MNR results, events have to be |
477 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) |
478 | // set to 2.76 GeV. |
479 | // To get a "perfect" agreement with MNR results, events have to be |
480 | // generated in four ptHard bins with the following relative |
481 | // normalizations: |
482 | // 2.76-4 GeV: 5% |
483 | // 4-6 GeV: 31% |
484 | // 6-8 GeV: 28% |
485 | // >8 GeV: 36% |
486 | ConfigHeavyFlavor(); |
487 | // QCD scales |
488 | SetPARP(67,1.0); |
489 | SetPARP(71,1.0); |
490 | |
491 | // Intrinsic <kT> |
492 | SetMSTP(91,1); |
493 | SetPARP(91,1.); |
494 | SetPARP(93,5.); |
495 | |
496 | // Set b-quark mass |
497 | SetPMAS(5,1,4.75); |
498 | |
499 | AtlasTuning(); |
500 | break; |
589380c6 |
501 | case kPyW: |
502 | |
503 | //Inclusive production of W+/- |
504 | SetMSEL(0); |
505 | //f fbar -> W+ |
506 | SetMSUB(2,1); |
507 | // //f fbar -> g W+ |
508 | // SetMSUB(16,1); |
509 | // //f fbar -> gamma W+ |
510 | // SetMSUB(20,1); |
511 | // //f g -> f W+ |
512 | // SetMSUB(31,1); |
513 | // //f gamma -> f W+ |
514 | // SetMSUB(36,1); |
515 | |
516 | // Initial/final parton shower on (Pythia default) |
517 | // With parton showers on we are generating "W inclusive process" |
518 | SetMSTP(61,1); //Initial QCD & QED showers on |
519 | SetMSTP(71,1); //Final QCD & QED showers on |
520 | |
521 | break; |
0f6ee828 |
522 | |
523 | case kPyZ: |
524 | |
525 | //Inclusive production of Z |
526 | SetMSEL(0); |
527 | //f fbar -> Z/gamma |
528 | SetMSUB(1,1); |
529 | |
530 | // // f fbar -> g Z/gamma |
531 | // SetMSUB(15,1); |
532 | // // f fbar -> gamma Z/gamma |
533 | // SetMSUB(19,1); |
534 | // // f g -> f Z/gamma |
535 | // SetMSUB(30,1); |
536 | // // f gamma -> f Z/gamma |
537 | // SetMSUB(35,1); |
538 | |
539 | //only Z included, not gamma |
540 | SetMSTP(43,2); |
541 | |
542 | // Initial/final parton shower on (Pythia default) |
543 | // With parton showers on we are generating "Z inclusive process" |
544 | SetMSTP(61,1); //Initial QCD & QED showers on |
545 | SetMSTP(71,1); //Final QCD & QED showers on |
546 | |
547 | break; |
548 | |
8d2cd130 |
549 | } |
550 | // |
551 | // Initialize PYTHIA |
552 | SetMSTP(41,1); // all resonance decays switched on |
8d2cd130 |
553 | Initialize("CMS","p","p",fEcms); |
4167b79f |
554 | |
8d2cd130 |
555 | } |
556 | |
557 | Int_t AliPythia::CheckedLuComp(Int_t kf) |
558 | { |
559 | // Check Lund particle code (for debugging) |
560 | Int_t kc=Pycomp(kf); |
561 | printf("\n Lucomp kf,kc %d %d",kf,kc); |
562 | return kc; |
563 | } |
564 | |
565 | void AliPythia::SetNuclei(Int_t a1, Int_t a2) |
566 | { |
567 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
568 | // The MSTP array in the PYPARS common block is used to enable and |
569 | // select the nuclear structure functions. |
570 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library |
571 | // =1: internal PYTHIA acording to MSTP(51) |
572 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET |
573 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. |
574 | // MSTP(192) : Mass number of nucleus side 1 |
575 | // MSTP(193) : Mass number of nucleus side 2 |
576 | SetMSTP(52,2); |
577 | SetMSTP(192, a1); |
578 | SetMSTP(193, a2); |
579 | } |
580 | |
581 | |
582 | AliPythia* AliPythia::Instance() |
583 | { |
584 | // Set random number generator |
585 | if (fgAliPythia) { |
586 | return fgAliPythia; |
587 | } else { |
588 | fgAliPythia = new AliPythia(); |
589 | return fgAliPythia; |
590 | } |
591 | } |
592 | |
593 | void AliPythia::PrintParticles() |
594 | { |
595 | // Print list of particl properties |
596 | Int_t np = 0; |
c31f1d37 |
597 | char* name = new char[16]; |
8d2cd130 |
598 | for (Int_t kf=0; kf<1000000; kf++) { |
599 | for (Int_t c = 1; c > -2; c-=2) { |
8d2cd130 |
600 | Int_t kc = Pycomp(c*kf); |
601 | if (kc) { |
602 | Float_t mass = GetPMAS(kc,1); |
603 | Float_t width = GetPMAS(kc,2); |
604 | Float_t tau = GetPMAS(kc,4); |
c31f1d37 |
605 | |
8d2cd130 |
606 | Pyname(kf,name); |
607 | |
608 | np++; |
609 | |
610 | printf("\n mass, width, tau: %6d %s %10.3f %10.3e %10.3e", |
611 | c*kf, name, mass, width, tau); |
612 | } |
613 | } |
614 | } |
615 | printf("\n Number of particles %d \n \n", np); |
616 | } |
617 | |
618 | void AliPythia::ResetDecayTable() |
619 | { |
620 | // Set default values for pythia decay switches |
621 | Int_t i; |
622 | for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); |
623 | for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); |
624 | } |
625 | |
626 | void AliPythia::SetDecayTable() |
627 | { |
628 | // Set default values for pythia decay switches |
629 | // |
630 | Int_t i; |
631 | for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); |
632 | for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); |
633 | } |
634 | |
635 | void AliPythia::Pyclus(Int_t& njet) |
636 | { |
637 | // Call Pythia clustering algorithm |
638 | // |
639 | pyclus(njet); |
640 | } |
641 | |
642 | void AliPythia::Pycell(Int_t& njet) |
643 | { |
644 | // Call Pythia jet reconstruction algorithm |
645 | // |
646 | pycell(njet); |
647 | } |
648 | |
452af8c7 |
649 | void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax) |
650 | { |
651 | // Call Pythia jet reconstruction algorithm |
652 | // |
452af8c7 |
653 | pyshow(ip1, ip2, qmax); |
654 | } |
655 | |
656 | void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez) |
657 | { |
658 | pyrobo(imi, ima, the, phi, bex, bey, bez); |
659 | } |
660 | |
661 | |
662 | |
32c8e463 |
663 | void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod, Float_t zmax, Int_t ngmax) |
0f482ae4 |
664 | { |
665 | // Initializes |
666 | // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann |
667 | // (2) The nuclear geometry using the Glauber Model |
668 | // |
6b435cde |
669 | |
0f482ae4 |
670 | fGlauber = new AliFastGlauber(); |
671 | fGlauber->Init(2); |
672 | fGlauber->SetCentralityClass(cMin, cMax); |
673 | |
674 | fQuenchingWeights = new AliQuenchingWeights(); |
675 | fQuenchingWeights->InitMult(); |
86b6ad68 |
676 | fQuenchingWeights->SetK(k); |
0f482ae4 |
677 | fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod)); |
32c8e463 |
678 | fNGmax = ngmax; |
679 | fZmax = zmax; |
680 | |
0f482ae4 |
681 | } |
682 | |
683 | |
452af8c7 |
684 | void AliPythia::Quench() |
685 | { |
686 | // |
687 | // |
688 | // Simple Jet Quenching routine: |
689 | // ============================= |
690 | // The jet formed by all final state partons radiated by the parton created |
0f482ae4 |
691 | // in the hard collisions is quenched by a factor (1-z) using light cone variables in |
692 | // the initial parton reference frame: |
452af8c7 |
693 | // (E + p_z)new = (1-z) (E + p_z)old |
694 | // |
0f482ae4 |
695 | // |
696 | // |
697 | // |
452af8c7 |
698 | // The lost momentum is first balanced by one gluon with virtuality > 0. |
699 | // Subsequently the gluon splits to yield two gluons with E = p. |
700 | // |
0f482ae4 |
701 | // |
702 | // |
4e383037 |
703 | static Float_t eMean = 0.; |
704 | static Int_t icall = 0; |
0f482ae4 |
705 | |
c2c598a3 |
706 | Double_t p0[4][5]; |
707 | Double_t p1[4][5]; |
708 | Double_t p2[4][5]; |
709 | Int_t klast[4] = {-1, -1, -1, -1}; |
452af8c7 |
710 | |
711 | Int_t numpart = fPyjets->N; |
86b6ad68 |
712 | Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0., phi = 0.; |
c2c598a3 |
713 | Double_t pxq[4], pyq[4], pzq[4], eq[4], yq[4], mq[4], pq[4], phiq[4], thetaq[4], ptq[4]; |
714 | Bool_t quenched[4]; |
b280c4cc |
715 | Double_t wjtKick[4]; |
c2c598a3 |
716 | Int_t nGluon[4]; |
86b6ad68 |
717 | Int_t qPdg[4]; |
0f482ae4 |
718 | Int_t imo, kst, pdg; |
b280c4cc |
719 | |
511db649 |
720 | // |
c2c598a3 |
721 | // Sore information about Primary partons |
722 | // |
723 | // j = |
724 | // 0, 1 partons from hard scattering |
725 | // 2, 3 partons from initial state radiation |
726 | // |
727 | for (Int_t i = 2; i <= 7; i++) { |
728 | Int_t j = 0; |
729 | // Skip gluons that participate in hard scattering |
730 | if (i == 4 || i == 5) continue; |
731 | // Gluons from hard Scattering |
732 | if (i == 6 || i == 7) { |
733 | j = i - 6; |
734 | pxq[j] = fPyjets->P[0][i]; |
735 | pyq[j] = fPyjets->P[1][i]; |
736 | pzq[j] = fPyjets->P[2][i]; |
737 | eq[j] = fPyjets->P[3][i]; |
738 | mq[j] = fPyjets->P[4][i]; |
739 | } else { |
740 | // Gluons from initial state radiation |
741 | // |
742 | // Obtain 4-momentum vector from difference between original parton and parton after gluon |
743 | // radiation. Energy is calculated independently because initial state radition does not |
744 | // conserve strictly momentum and energy for each partonic system independently. |
745 | // |
746 | // Not very clean. Should be improved ! |
747 | // |
748 | // |
749 | j = i; |
750 | pxq[j] = fPyjets->P[0][i] - fPyjets->P[0][i+2]; |
751 | pyq[j] = fPyjets->P[1][i] - fPyjets->P[1][i+2]; |
752 | pzq[j] = fPyjets->P[2][i] - fPyjets->P[2][i+2]; |
753 | mq[j] = fPyjets->P[4][i]; |
754 | eq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j] + mq[j] * mq[j]); |
755 | } |
756 | // |
757 | // Calculate some kinematic variables |
511db649 |
758 | // |
4e383037 |
759 | yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14)); |
0f482ae4 |
760 | pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]); |
761 | phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]); |
762 | ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]); |
763 | thetaq[j] = TMath::ATan2(ptq[j], pzq[j]); |
86b6ad68 |
764 | qPdg[j] = fPyjets->K[1][i]; |
765 | } |
766 | |
767 | Double_t int0[4]; |
768 | Double_t int1[4]; |
86b6ad68 |
769 | |
b280c4cc |
770 | fGlauber->GetI0I1ForPythiaAndXY(4, phiq, int0, int1, fXJet, fYJet, 15.); |
771 | |
86b6ad68 |
772 | for (Int_t j = 0; j < 4; j++) { |
c2c598a3 |
773 | // |
774 | // Quench only central jets and with E > 10. |
775 | // |
86b6ad68 |
776 | |
777 | |
778 | Int_t itype = (qPdg[j] == 21) ? 2 : 1; |
779 | Double_t eloss = fQuenchingWeights->GetELossRandomKFast(itype, int0[j], int1[j], eq[j]); |
780 | |
c2c598a3 |
781 | if (TMath::Abs(yq[j]) > 2.5 || eq[j] < 10.) { |
b280c4cc |
782 | fZQuench[j] = 0.; |
0f482ae4 |
783 | } else { |
c2c598a3 |
784 | if (eq[j] > 40. && TMath::Abs(yq[j]) < 0.5) { |
4e383037 |
785 | icall ++; |
786 | eMean += eloss; |
787 | } |
0f482ae4 |
788 | // |
789 | // Extra pt |
86b6ad68 |
790 | Double_t l = fQuenchingWeights->CalcLk(int0[j], int1[j]); |
791 | wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->CalcQk(int0[j], int1[j])); |
0f482ae4 |
792 | // |
793 | // Fractional energy loss |
b280c4cc |
794 | fZQuench[j] = eloss / eq[j]; |
0f482ae4 |
795 | // |
796 | // Avoid complete loss |
797 | // |
32c8e463 |
798 | if (fZQuench[j] == 1.) fZQuench[j] = fZmax; |
0f482ae4 |
799 | // |
800 | // Some debug printing |
86b6ad68 |
801 | |
802 | |
bf9bb016 |
803 | // 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", |
804 | // j, itype, eq[j], phiq[j], l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]); |
4e383037 |
805 | |
b280c4cc |
806 | // fZQuench[j] = 0.8; |
807 | // while (fZQuench[j] >= 0.95) fZQuench[j] = gRandom->Exp(0.2); |
0f482ae4 |
808 | } |
4e383037 |
809 | |
b280c4cc |
810 | quenched[j] = (fZQuench[j] > 0.01); |
4e383037 |
811 | } // primary partons |
c2c598a3 |
812 | |
b280c4cc |
813 | |
814 | |
6e90ad26 |
815 | Double_t pNew[1000][4]; |
816 | Int_t kNew[1000]; |
817 | Int_t icount = 0; |
b280c4cc |
818 | Double_t zquench[4]; |
819 | |
6e90ad26 |
820 | // |
4e383037 |
821 | // System Loop |
c2c598a3 |
822 | for (Int_t isys = 0; isys < 4; isys++) { |
6e90ad26 |
823 | // Skip to next system if not quenched. |
4e383037 |
824 | if (!quenched[isys]) continue; |
825 | |
b280c4cc |
826 | nGluon[isys] = 1 + Int_t(fZQuench[isys] / (1. - fZQuench[isys])); |
32c8e463 |
827 | if (nGluon[isys] > fNGmax) nGluon[isys] = fNGmax; |
b280c4cc |
828 | zquench[isys] = 1. - TMath::Power(1. - fZQuench[isys], 1./Double_t(nGluon[isys])); |
4e383037 |
829 | wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys])); |
0f482ae4 |
830 | |
4e383037 |
831 | |
832 | |
833 | Int_t igMin = -1; |
834 | Int_t igMax = -1; |
835 | Double_t pg[4] = {0., 0., 0., 0.}; |
836 | |
837 | // |
838 | // Loop on radiation events |
839 | |
840 | for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) { |
6e90ad26 |
841 | while (1) { |
842 | icount = 0; |
843 | for (Int_t k = 0; k < 4; k++) |
844 | { |
845 | p0[isys][k] = 0.; |
846 | p1[isys][k] = 0.; |
847 | p2[isys][k] = 0.; |
848 | } |
849 | // Loop over partons |
850 | for (Int_t i = 0; i < numpart; i++) |
851 | { |
852 | imo = fPyjets->K[2][i]; |
853 | kst = fPyjets->K[0][i]; |
854 | pdg = fPyjets->K[1][i]; |
855 | |
856 | |
857 | |
0f482ae4 |
858 | // Quarks and gluons only |
6e90ad26 |
859 | if (pdg != 21 && TMath::Abs(pdg) > 6) continue; |
0f482ae4 |
860 | // Particles from hard scattering only |
c2c598a3 |
861 | |
6e90ad26 |
862 | if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1]; |
c2c598a3 |
863 | Int_t imom = imo % 1000; |
864 | if ((isys == 0 || isys == 1) && ((imom != (isys + 7)))) continue; |
865 | if ((isys == 2 || isys == 3) && ((imom != (isys + 1)))) continue; |
866 | |
6e90ad26 |
867 | |
0f482ae4 |
868 | // Skip comment lines |
6e90ad26 |
869 | if (kst != 1 && kst != 2) continue; |
0f482ae4 |
870 | // |
871 | // Parton kinematic |
6e90ad26 |
872 | px = fPyjets->P[0][i]; |
873 | py = fPyjets->P[1][i]; |
874 | pz = fPyjets->P[2][i]; |
875 | e = fPyjets->P[3][i]; |
876 | m = fPyjets->P[4][i]; |
877 | pt = TMath::Sqrt(px * px + py * py); |
878 | p = TMath::Sqrt(px * px + py * py + pz * pz); |
879 | phi = TMath::Pi() + TMath::ATan2(-py, -px); |
880 | theta = TMath::ATan2(pt, pz); |
881 | |
0f482ae4 |
882 | // |
c2c598a3 |
883 | // Save 4-momentum sum for balancing |
884 | Int_t index = isys; |
6e90ad26 |
885 | |
886 | p0[index][0] += px; |
887 | p0[index][1] += py; |
888 | p0[index][2] += pz; |
889 | p0[index][3] += e; |
6e90ad26 |
890 | |
891 | klast[index] = i; |
892 | |
0f482ae4 |
893 | // |
894 | // Fractional energy loss |
b280c4cc |
895 | Double_t z = zquench[index]; |
4e383037 |
896 | |
c2c598a3 |
897 | |
4e383037 |
898 | // Don't fully quench radiated gluons |
899 | // |
900 | if (imo > 1000) { |
901 | // This small factor makes sure that the gluons are not too close in phase space to avoid recombination |
902 | // |
903 | |
c2c598a3 |
904 | z = 0.02; |
4e383037 |
905 | } |
c2c598a3 |
906 | // printf("z: %d %f\n", imo, z); |
907 | |
4e383037 |
908 | |
909 | // |
6e90ad26 |
910 | |
911 | // |
912 | // |
913 | // Transform into frame in which initial parton is along z-axis |
914 | // |
915 | TVector3 v(px, py, pz); |
916 | v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]); |
917 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z(); |
918 | |
919 | Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys); |
920 | Double_t mt2 = jt * jt + m * m; |
921 | Double_t zmax = 1.; |
922 | // |
923 | // Kinematic limit on z |
924 | // |
4e383037 |
925 | if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt); |
6e90ad26 |
926 | // |
927 | // Change light-cone kinematics rel. to initial parton |
928 | // |
929 | Double_t eppzOld = e + pl; |
930 | Double_t empzOld = e - pl; |
931 | |
932 | Double_t eppzNew = (1. - z) * eppzOld; |
933 | Double_t empzNew = empzOld - mt2 * z / eppzOld; |
934 | Double_t eNew = 0.5 * (eppzNew + empzNew); |
935 | Double_t plNew = 0.5 * (eppzNew - empzNew); |
936 | |
937 | Double_t jtNew; |
938 | // |
939 | // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0 |
940 | Double_t mt2New = eppzNew * empzNew; |
941 | if (mt2New < 1.e-8) mt2New = 0.; |
4e383037 |
942 | if (z < zmax) { |
943 | if (m * m > mt2New) { |
944 | // |
945 | // This should not happen |
946 | // |
947 | Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew); |
948 | jtNew = 0; |
949 | } else { |
950 | jtNew = TMath::Sqrt(mt2New - m * m); |
951 | } |
6e90ad26 |
952 | } else { |
4e383037 |
953 | // If pT is to small (probably a leading massive particle) we scale only the energy |
954 | // This can cause negative masses of the radiated gluon |
955 | // Let's hope for the best ... |
956 | jtNew = jt; |
957 | eNew = TMath::Sqrt(plNew * plNew + mt2); |
958 | |
6e90ad26 |
959 | } |
6e90ad26 |
960 | // |
961 | // Calculate new px, py |
962 | // |
963 | Double_t pxNew = jtNew / jt * pxs; |
964 | Double_t pyNew = jtNew / jt * pys; |
965 | |
966 | // Double_t dpx = pxs - pxNew; |
967 | // Double_t dpy = pys - pyNew; |
968 | // Double_t dpz = pl - plNew; |
969 | // Double_t de = e - eNew; |
970 | // Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz; |
971 | // printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew); |
972 | // printf("New mass (2) %e %e \n", pxNew, pyNew); |
973 | // |
974 | // Rotate back |
975 | // |
976 | TVector3 w(pxNew, pyNew, plNew); |
977 | w.RotateY(thetaq[index]); w.RotateZ(phiq[index]); |
978 | pxNew = w.X(); pyNew = w.Y(); plNew = w.Z(); |
979 | |
980 | p1[index][0] += pxNew; |
981 | p1[index][1] += pyNew; |
982 | p1[index][2] += plNew; |
983 | p1[index][3] += eNew; |
984 | // |
985 | // Updated 4-momentum vectors |
986 | // |
987 | pNew[icount][0] = pxNew; |
988 | pNew[icount][1] = pyNew; |
989 | pNew[icount][2] = plNew; |
990 | pNew[icount][3] = eNew; |
991 | kNew[icount] = i; |
992 | icount++; |
993 | } // parton loop |
0f482ae4 |
994 | // |
6e90ad26 |
995 | // Check if there was phase-space for quenching |
0f482ae4 |
996 | // |
0f482ae4 |
997 | |
6e90ad26 |
998 | if (icount == 0) quenched[isys] = kFALSE; |
999 | if (!quenched[isys]) break; |
1000 | |
1001 | for (Int_t j = 0; j < 4; j++) |
1002 | { |
1003 | p2[isys][j] = p0[isys][j] - p1[isys][j]; |
1004 | } |
1005 | 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 |
1006 | if (p2[isys][4] > 0.) { |
1007 | p2[isys][4] = TMath::Sqrt(p2[isys][4]); |
1008 | break; |
1009 | } else { |
b280c4cc |
1010 | printf("Warning negative mass squared in system %d %f ! \n", isys, zquench[isys]); |
4e383037 |
1011 | 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 |
1012 | if (p2[isys][4] < -0.01) { |
4e383037 |
1013 | printf("Negative mass squared !\n"); |
1014 | // Here we have to put the gluon back to mass shell |
1015 | // This will lead to a small energy imbalance |
1016 | p2[isys][4] = 0.; |
1017 | p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]); |
1018 | break; |
6e90ad26 |
1019 | } else { |
1020 | p2[isys][4] = 0.; |
1021 | break; |
1022 | } |
1023 | } |
6e90ad26 |
1024 | /* |
6e90ad26 |
1025 | zHeavy *= 0.98; |
1026 | printf("zHeavy lowered to %f\n", zHeavy); |
1027 | if (zHeavy < 0.01) { |
1028 | printf("No success ! \n"); |
1029 | icount = 0; |
1030 | quenched[isys] = kFALSE; |
1031 | break; |
1032 | } |
4e383037 |
1033 | */ |
1034 | } // iteration on z (while) |
1035 | |
6e90ad26 |
1036 | // Update event record |
1037 | for (Int_t k = 0; k < icount; k++) { |
1038 | // 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] ); |
1039 | fPyjets->P[0][kNew[k]] = pNew[k][0]; |
1040 | fPyjets->P[1][kNew[k]] = pNew[k][1]; |
1041 | fPyjets->P[2][kNew[k]] = pNew[k][2]; |
1042 | fPyjets->P[3][kNew[k]] = pNew[k][3]; |
0f482ae4 |
1043 | } |
4e383037 |
1044 | // |
1045 | // Add the gluons |
1046 | // |
1047 | Int_t ish = 0; |
1837e95c |
1048 | Int_t iGlu; |
4e383037 |
1049 | if (!quenched[isys]) continue; |
0f482ae4 |
1050 | // |
1051 | // Last parton from shower i |
4e383037 |
1052 | Int_t in = klast[isys]; |
0f482ae4 |
1053 | // |
1054 | // Continue if no parton in shower i selected |
1055 | if (in == -1) continue; |
1056 | // |
1057 | // If this is the second initial parton and it is behind the first move pointer by previous ish |
4e383037 |
1058 | if (isys == 1 && klast[1] > klast[0]) in += ish; |
0f482ae4 |
1059 | // |
1060 | // Starting index |
452af8c7 |
1061 | |
4e383037 |
1062 | // jmin = in - 1; |
0f482ae4 |
1063 | // How many additional gluons will be generated |
1064 | ish = 1; |
4e383037 |
1065 | if (p2[isys][4] > 0.05) ish = 2; |
0f482ae4 |
1066 | // |
1067 | // Position of gluons |
4e383037 |
1068 | iGlu = numpart; |
1069 | if (iglu == 0) igMin = iGlu; |
1070 | igMax = iGlu; |
0f482ae4 |
1071 | numpart += ish; |
1072 | (fPyjets->N) += ish; |
4e383037 |
1073 | |
0f482ae4 |
1074 | if (ish == 1) { |
4e383037 |
1075 | fPyjets->P[0][iGlu] = p2[isys][0]; |
1076 | fPyjets->P[1][iGlu] = p2[isys][1]; |
1077 | fPyjets->P[2][iGlu] = p2[isys][2]; |
1078 | fPyjets->P[3][iGlu] = p2[isys][3]; |
1079 | fPyjets->P[4][iGlu] = p2[isys][4]; |
0f482ae4 |
1080 | |
4e383037 |
1081 | fPyjets->K[0][iGlu] = 1; |
1082 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1; |
0f482ae4 |
1083 | fPyjets->K[1][iGlu] = 21; |
4e383037 |
1084 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 |
1085 | fPyjets->K[3][iGlu] = -1; |
1086 | fPyjets->K[4][iGlu] = -1; |
4e383037 |
1087 | |
1088 | pg[0] += p2[isys][0]; |
1089 | pg[1] += p2[isys][1]; |
1090 | pg[2] += p2[isys][2]; |
1091 | pg[3] += p2[isys][3]; |
0f482ae4 |
1092 | } else { |
1093 | // |
1094 | // Split gluon in rest frame. |
1095 | // |
4e383037 |
1096 | Double_t bx = p2[isys][0] / p2[isys][3]; |
1097 | Double_t by = p2[isys][1] / p2[isys][3]; |
1098 | Double_t bz = p2[isys][2] / p2[isys][3]; |
1099 | Double_t pst = p2[isys][4] / 2.; |
0f482ae4 |
1100 | // |
1101 | // Isotropic decay ???? |
1102 | Double_t cost = 2. * gRandom->Rndm() - 1.; |
1103 | Double_t sint = TMath::Sqrt(1. - cost * cost); |
1104 | Double_t phi = 2. * TMath::Pi() * gRandom->Rndm(); |
1105 | |
1106 | Double_t pz1 = pst * cost; |
1107 | Double_t pz2 = -pst * cost; |
1108 | Double_t pt1 = pst * sint; |
1109 | Double_t pt2 = -pst * sint; |
1110 | Double_t px1 = pt1 * TMath::Cos(phi); |
1111 | Double_t py1 = pt1 * TMath::Sin(phi); |
1112 | Double_t px2 = pt2 * TMath::Cos(phi); |
1113 | Double_t py2 = pt2 * TMath::Sin(phi); |
1114 | |
1115 | fPyjets->P[0][iGlu] = px1; |
1116 | fPyjets->P[1][iGlu] = py1; |
1117 | fPyjets->P[2][iGlu] = pz1; |
1118 | fPyjets->P[3][iGlu] = pst; |
1119 | fPyjets->P[4][iGlu] = 0.; |
1120 | |
4e383037 |
1121 | fPyjets->K[0][iGlu] = 1 ; |
0f482ae4 |
1122 | fPyjets->K[1][iGlu] = 21; |
4e383037 |
1123 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 |
1124 | fPyjets->K[3][iGlu] = -1; |
1125 | fPyjets->K[4][iGlu] = -1; |
1126 | |
1127 | fPyjets->P[0][iGlu+1] = px2; |
1128 | fPyjets->P[1][iGlu+1] = py2; |
1129 | fPyjets->P[2][iGlu+1] = pz2; |
1130 | fPyjets->P[3][iGlu+1] = pst; |
1131 | fPyjets->P[4][iGlu+1] = 0.; |
1132 | |
4e383037 |
1133 | fPyjets->K[0][iGlu+1] = 1; |
1134 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1; |
0f482ae4 |
1135 | fPyjets->K[1][iGlu+1] = 21; |
4e383037 |
1136 | fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000; |
0f482ae4 |
1137 | fPyjets->K[3][iGlu+1] = -1; |
1138 | fPyjets->K[4][iGlu+1] = -1; |
1139 | SetMSTU(1,0); |
1140 | SetMSTU(2,0); |
1141 | // |
1142 | // Boost back |
1143 | // |
1144 | Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz); |
1145 | } |
4e383037 |
1146 | /* |
1147 | for (Int_t ig = iGlu; ig < iGlu+ish; ig++) { |
1148 | Double_t px, py, pz; |
1149 | px = fPyjets->P[0][ig]; |
1150 | py = fPyjets->P[1][ig]; |
1151 | pz = fPyjets->P[2][ig]; |
1152 | TVector3 v(px, py, pz); |
1153 | v.RotateZ(-phiq[isys]); |
1154 | v.RotateY(-thetaq[isys]); |
1155 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z(); |
1156 | Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm(); |
1157 | Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r)); |
1158 | if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.); |
1159 | Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm(); |
1160 | pxs += jtKick * TMath::Cos(phiKick); |
1161 | pys += jtKick * TMath::Sin(phiKick); |
1162 | TVector3 w(pxs, pys, pzs); |
1163 | w.RotateY(thetaq[isys]); |
1164 | w.RotateZ(phiq[isys]); |
1165 | fPyjets->P[0][ig] = w.X(); |
1166 | fPyjets->P[1][ig] = w.Y(); |
1167 | fPyjets->P[2][ig] = w.Z(); |
1168 | fPyjets->P[2][ig] = w.Mag(); |
1169 | } |
1170 | */ |
1171 | } // kGluon |
1172 | |
6e90ad26 |
1173 | |
4e383037 |
1174 | // Check energy conservation |
0f482ae4 |
1175 | Double_t pxs = 0.; |
1176 | Double_t pys = 0.; |
1177 | Double_t pzs = 0.; |
1178 | Double_t es = 14000.; |
1179 | |
1180 | for (Int_t i = 0; i < numpart; i++) |
1181 | { |
1182 | kst = fPyjets->K[0][i]; |
1183 | if (kst != 1 && kst != 2) continue; |
1184 | pxs += fPyjets->P[0][i]; |
1185 | pys += fPyjets->P[1][i]; |
1186 | pzs += fPyjets->P[2][i]; |
1187 | es -= fPyjets->P[3][i]; |
1188 | } |
1189 | if (TMath::Abs(pxs) > 1.e-2 || |
1190 | TMath::Abs(pys) > 1.e-2 || |
1191 | TMath::Abs(pzs) > 1.e-1) { |
1192 | printf("%e %e %e %e\n", pxs, pys, pzs, es); |
4e383037 |
1193 | // Fatal("Quench()", "4-Momentum non-conservation"); |
452af8c7 |
1194 | } |
4e383037 |
1195 | |
1196 | } // end quenching loop (systems) |
6e90ad26 |
1197 | // Clean-up |
0f482ae4 |
1198 | for (Int_t i = 0; i < numpart; i++) |
1199 | { |
4e383037 |
1200 | imo = fPyjets->K[2][i]; |
1201 | if (imo > 1000) { |
1202 | fPyjets->K[2][i] = fPyjets->K[2][i] % 1000; |
1203 | } |
0f482ae4 |
1204 | } |
4e383037 |
1205 | // this->Pylist(1); |
0f482ae4 |
1206 | } // end quench |
90d7b703 |
1207 | |
992f2843 |
1208 | |
1209 | void AliPythia::Pyquen(Double_t a, Int_t ibf, Double_t b) |
1210 | { |
1211 | // Igor Lokthine's quenching routine |
1212 | pyquen(a, ibf, b); |
1213 | } |
b280c4cc |
1214 | |
16a82508 |
1215 | void AliPythia::Pyevnw() |
1216 | { |
1217 | // New multiple interaction scenario |
1218 | pyevnw(); |
1219 | } |
1220 | |
b280c4cc |
1221 | void AliPythia::GetQuenchingParameters(Double_t& xp, Double_t& yp, Double_t z[4]) |
1222 | { |
1223 | // Return event specific quenching parameters |
1224 | xp = fXJet; |
1225 | yp = fYJet; |
1226 | for (Int_t i = 0; i < 4; i++) z[i] = fZQuench[i]; |
1227 | |
1228 | } |
1229 | |
3dc3ec94 |
1230 | void AliPythia::ConfigHeavyFlavor() |
1231 | { |
1232 | // |
1233 | // Default configuration for Heavy Flavor production |
1234 | // |
1235 | // All QCD processes |
1236 | // |
1237 | SetMSEL(1); |
1238 | |
1239 | // No multiple interactions |
1240 | SetMSTP(81,0); |
39c2e610 |
1241 | SetPARP(81, 0.); |
1242 | SetPARP(82, 0.); |
3dc3ec94 |
1243 | // Initial/final parton shower on (Pythia default) |
1244 | SetMSTP(61,1); |
1245 | SetMSTP(71,1); |
1246 | |
1247 | // 2nd order alpha_s |
1248 | SetMSTP(2,2); |
1249 | |
1250 | // QCD scales |
1251 | SetMSTP(32,2); |
1252 | SetPARP(34,1.0); |
1253 | } |
e0e89f40 |
1254 | |
1255 | void AliPythia::AtlasTuning() |
1256 | { |
1257 | // |
1258 | // Configuration for the ATLAS tuning |
1259 | SetMSTP(51, kCTEQ5L); // CTEQ5L pdf |
1260 | SetMSTP(81,1); // Multiple Interactions ON |
1261 | SetMSTP(82,4); // Double Gaussian Model |
39c2e610 |
1262 | SetPARP(81,1.9); // Min. pt for multiple interactions (default in 6.2-14) |
e0e89f40 |
1263 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy |
1264 | SetPARP(89,1000.); // [GeV] Ref. energy |
1265 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) |
1266 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) |
1267 | SetPARP(84,0.5); // Core radius |
1268 | SetPARP(85,0.33); // Regulates gluon prod. mechanism |
1269 | SetPARP(86,0.66); // Regulates gluon prod. mechanism |
1270 | SetPARP(67,1); // Regulates Initial State Radiation |
1271 | } |
e8a8adcd |
1272 | |
1273 | AliPythia& AliPythia::operator=(const AliPythia& rhs) |
1274 | { |
1275 | // Assignment operator |
1276 | rhs.Copy(*this); |
1277 | return *this; |
1278 | } |
1279 | |
1280 | void AliPythia::Copy(TObject&) const |
1281 | { |
1282 | // |
1283 | // Copy |
1284 | // |
1285 | Fatal("Copy","Not implemented!\n"); |
1286 | } |