]>
Commit | Line | Data |
---|---|---|
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" |
12cb0bc0 | 20 | #include "AliFastGlauber.h" |
21 | #include "AliQuenchingWeights.h" | |
03358a32 | 22 | #include "AliOmegaDalitz.h" |
0f482ae4 | 23 | #include "TVector3.h" |
03358a32 | 24 | #include "TLorentzVector.h" |
12cb0bc0 | 25 | #include "PyquenCommon.h" |
8d2cd130 | 26 | |
27 | ClassImp(AliPythia) | |
28 | ||
29 | #ifndef WIN32 | |
30 | # define pyclus pyclus_ | |
31 | # define pycell pycell_ | |
452af8c7 | 32 | # define pyshow pyshow_ |
33 | # define pyrobo pyrobo_ | |
992f2843 | 34 | # define pyquen pyquen_ |
16a82508 | 35 | # define pyevnw pyevnw_ |
cd07c39b | 36 | # define pyshowq pyshowq_ |
6c43eccb | 37 | # define qpygin0 qpygin0_ |
694b39f9 | 38 | # define pytune pytune_ |
9b61ba2a | 39 | # define py2ent py2ent_ |
8d2cd130 | 40 | # define type_of_call |
41 | #else | |
42 | # define pyclus PYCLUS | |
43 | # define pycell PYCELL | |
452af8c7 | 44 | # define pyrobo PYROBO |
992f2843 | 45 | # define pyquen PYQUEN |
16a82508 | 46 | # define pyevnw PYEVNW |
cd07c39b | 47 | # define pyshowq PYSHOWQ |
6c43eccb | 48 | # define qpygin0 QPYGIN0 |
9b61ba2a | 49 | # define pytune PYTUNE |
50 | # define py2ent PY2ENT | |
8d2cd130 | 51 | # define type_of_call _stdcall |
52 | #endif | |
53 | ||
54 | extern "C" void type_of_call pyclus(Int_t & ); | |
55 | extern "C" void type_of_call pycell(Int_t & ); | |
452af8c7 | 56 | extern "C" void type_of_call pyshow(Int_t &, Int_t &, Double_t &); |
57 | extern "C" void type_of_call pyrobo(Int_t &, Int_t &, Double_t &, Double_t &, Double_t &, Double_t &, Double_t &); | |
992f2843 | 58 | extern "C" void type_of_call pyquen(Double_t &, Int_t &, Double_t &); |
0a2cfc0a | 59 | extern "C" void type_of_call pyevnw(){;} |
cd07c39b | 60 | extern "C" void type_of_call pyshowq(Int_t &, Int_t &, Double_t &); |
694b39f9 | 61 | extern "C" void type_of_call pytune(Int_t &); |
9b61ba2a | 62 | extern "C" void type_of_call py2ent(Int_t &, Int_t&, Int_t&, Double_t&); |
6c43eccb | 63 | extern "C" void type_of_call qpygin0(); |
8d2cd130 | 64 | //_____________________________________________________________________________ |
65 | ||
66 | AliPythia* AliPythia::fgAliPythia=NULL; | |
67 | ||
e8a8adcd | 68 | AliPythia::AliPythia(): |
69 | fProcess(kPyMb), | |
70 | fEcms(0.), | |
71 | fStrucFunc(kCTEQ5L), | |
72 | fXJet(0.), | |
73 | fYJet(0.), | |
32c8e463 | 74 | fNGmax(30), |
75 | fZmax(0.97), | |
e8a8adcd | 76 | fGlauber(0), |
0bd3d7c5 | 77 | fQuenchingWeights(0), |
03358a32 | 78 | fItune(-1), |
79 | fOmegaDalitz() | |
8d2cd130 | 80 | { |
81 | // Default Constructor | |
82 | // | |
83 | // Set random number | |
7cdba479 | 84 | if (!AliPythiaRndm::GetPythiaRandom()) |
85 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
0f482ae4 | 86 | fGlauber = 0; |
87 | fQuenchingWeights = 0; | |
8d2cd130 | 88 | } |
89 | ||
e8a8adcd | 90 | AliPythia::AliPythia(const AliPythia& pythia): |
6b435cde | 91 | TPythia6(pythia), |
92 | AliRndm(pythia), | |
e8a8adcd | 93 | fProcess(kPyMb), |
94 | fEcms(0.), | |
95 | fStrucFunc(kCTEQ5L), | |
96 | fXJet(0.), | |
97 | fYJet(0.), | |
32c8e463 | 98 | fNGmax(30), |
99 | fZmax(0.97), | |
e8a8adcd | 100 | fGlauber(0), |
0bd3d7c5 | 101 | fQuenchingWeights(0), |
03358a32 | 102 | fItune(-1), |
103 | fOmegaDalitz() | |
e8a8adcd | 104 | { |
105 | // Copy Constructor | |
106 | pythia.Copy(*this); | |
107 | } | |
108 | ||
efe3b1cd | 109 | void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc, Int_t itune) |
8d2cd130 | 110 | { |
111 | // Initialise the process to generate | |
7cdba479 | 112 | if (!AliPythiaRndm::GetPythiaRandom()) |
113 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
8d2cd130 | 114 | |
0bd3d7c5 | 115 | fItune = itune; |
116 | ||
8d2cd130 | 117 | fProcess = process; |
118 | fEcms = energy; | |
119 | fStrucFunc = strucfunc; | |
1d5b1b20 | 120 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. |
e2de0ce1 | 121 | SetMDCY(Pycomp(111) ,1,0); // pi0 |
122 | SetMDCY(Pycomp(310) ,1,0); // K0S | |
123 | SetMDCY(Pycomp(3122),1,0); // kLambda | |
124 | SetMDCY(Pycomp(3112),1,0); // sigma - | |
e2de0ce1 | 125 | SetMDCY(Pycomp(3222),1,0); // sigma + |
126 | SetMDCY(Pycomp(3312),1,0); // xi - | |
127 | SetMDCY(Pycomp(3322),1,0); // xi 0 | |
128 | SetMDCY(Pycomp(3334),1,0); // omega- | |
1c50ec12 | 129 | // Select structure function |
8d2cd130 | 130 | SetMSTP(52,2); |
e2de0ce1 | 131 | SetMSTP(51, AliStructFuncType::PDFsetIndex(strucfunc)); |
1c50ec12 | 132 | // Particles produced in string fragmentation point directly to either of the two endpoints |
133 | // of the string (depending in the side they were generated from). | |
134 | SetMSTU(16,2); | |
135 | ||
8d2cd130 | 136 | // |
137 | // Pythia initialisation for selected processes// | |
138 | // | |
139 | // Make MSEL clean | |
140 | // | |
141 | for (Int_t i=1; i<= 200; i++) { | |
142 | SetMSUB(i,0); | |
143 | } | |
144 | // select charm production | |
145 | switch (process) | |
146 | { | |
65f2626c | 147 | case kPyOldUEQ2ordered: //Old underlying events with Q2 ordered QCD processes |
148 | // Multiple interactions on. | |
149 | SetMSTP(81,1); | |
150 | // Double Gaussian matter distribution. | |
151 | SetMSTP(82,4); | |
152 | SetPARP(83,0.5); | |
153 | SetPARP(84,0.4); | |
154 | // pT0. | |
155 | SetPARP(82,2.0); | |
156 | // Reference energy for pT0 and energy rescaling pace. | |
157 | SetPARP(89,1800); | |
158 | SetPARP(90,0.25); | |
159 | // String drawing almost completely minimizes string length. | |
160 | SetPARP(85,0.9); | |
161 | SetPARP(86,0.95); | |
162 | // ISR and FSR activity. | |
163 | SetPARP(67,4); | |
164 | SetPARP(71,4); | |
165 | // Lambda_FSR scale. | |
166 | SetPARJ(81,0.29); | |
167 | break; | |
168 | case kPyOldUEQ2ordered2: | |
169 | // Old underlying events with Q2 ordered QCD processes | |
170 | // Multiple interactions on. | |
171 | SetMSTP(81,1); | |
172 | // Double Gaussian matter distribution. | |
173 | SetMSTP(82,4); | |
174 | SetPARP(83,0.5); | |
175 | SetPARP(84,0.4); | |
176 | // pT0. | |
177 | SetPARP(82,2.0); | |
178 | // Reference energy for pT0 and energy rescaling pace. | |
179 | SetPARP(89,1800); | |
180 | SetPARP(90,0.16); // here is the difference with kPyOldUEQ2ordered | |
181 | // String drawing almost completely minimizes string length. | |
182 | SetPARP(85,0.9); | |
183 | SetPARP(86,0.95); | |
184 | // ISR and FSR activity. | |
185 | SetPARP(67,4); | |
186 | SetPARP(71,4); | |
187 | // Lambda_FSR scale. | |
188 | SetPARJ(81,0.29); | |
189 | break; | |
190 | case kPyOldPopcorn: | |
191 | // Old production mechanism: Old Popcorn | |
192 | SetMSEL(1); | |
193 | SetMSTJ(12,3); | |
194 | // (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon | |
195 | SetMSTP(88,2); | |
196 | // (D=1)see can be used to form baryons (BARYON JUNCTION) | |
197 | SetMSTJ(1,1); | |
e0e89f40 | 198 | AtlasTuning(); |
65f2626c | 199 | break; |
8d2cd130 | 200 | case kPyCharm: |
201 | SetMSEL(4); | |
8d2cd130 | 202 | // heavy quark masses |
203 | ||
204 | SetPMAS(4,1,1.2); | |
8d2cd130 | 205 | // |
206 | // primordial pT | |
207 | SetMSTP(91,1); | |
208 | SetPARP(91,1.); | |
209 | SetPARP(93,5.); | |
210 | // | |
211 | break; | |
212 | case kPyBeauty: | |
213 | SetMSEL(5); | |
214 | SetPMAS(5,1,4.75); | |
8d2cd130 | 215 | break; |
216 | case kPyJpsi: | |
217 | SetMSEL(0); | |
218 | // gg->J/Psi g | |
219 | SetMSUB(86,1); | |
220 | break; | |
221 | case kPyJpsiChi: | |
222 | SetMSEL(0); | |
223 | // gg->J/Psi g | |
224 | SetMSUB(86,1); | |
225 | // gg-> chi_0c g | |
226 | SetMSUB(87,1); | |
227 | // gg-> chi_1c g | |
228 | SetMSUB(88,1); | |
229 | // gg-> chi_2c g | |
230 | SetMSUB(89,1); | |
231 | break; | |
232 | case kPyCharmUnforced: | |
233 | SetMSEL(0); | |
234 | // gq->qg | |
235 | SetMSUB(28,1); | |
236 | // gg->qq | |
237 | SetMSUB(53,1); | |
238 | // gg->gg | |
239 | SetMSUB(68,1); | |
240 | break; | |
241 | case kPyBeautyUnforced: | |
242 | SetMSEL(0); | |
243 | // gq->qg | |
244 | SetMSUB(28,1); | |
245 | // gg->qq | |
246 | SetMSUB(53,1); | |
247 | // gg->gg | |
248 | SetMSUB(68,1); | |
249 | break; | |
250 | case kPyMb: | |
251 | // Minimum Bias pp-Collisions | |
252 | // | |
253 | // | |
254 | // select Pythia min. bias model | |
255 | SetMSEL(0); | |
511db649 | 256 | SetMSUB(92,1); // single diffraction AB-->XB |
257 | SetMSUB(93,1); // single diffraction AB-->AX | |
258 | SetMSUB(94,1); // double diffraction | |
259 | SetMSUB(95,1); // low pt production | |
260 | ||
e0e89f40 | 261 | AtlasTuning(); |
f529e69b | 262 | break; |
0bd3d7c5 | 263 | |
264 | case kPyMbAtlasTuneMC09: | |
265 | // Minimum Bias pp-Collisions | |
266 | // | |
267 | // | |
268 | // select Pythia min. bias model | |
269 | SetMSEL(0); | |
270 | SetMSUB(92,1); // single diffraction AB-->XB | |
271 | SetMSUB(93,1); // single diffraction AB-->AX | |
272 | SetMSUB(94,1); // double diffraction | |
273 | SetMSUB(95,1); // low pt production | |
274 | ||
275 | AtlasTuning_MC09(); | |
276 | break; | |
04081a91 | 277 | |
278 | case kPyMbWithDirectPhoton: | |
279 | // Minimum Bias pp-Collisions with direct photon processes added | |
280 | // | |
281 | // | |
282 | // select Pythia min. bias model | |
283 | SetMSEL(0); | |
284 | SetMSUB(92,1); // single diffraction AB-->XB | |
285 | SetMSUB(93,1); // single diffraction AB-->AX | |
286 | SetMSUB(94,1); // double diffraction | |
287 | SetMSUB(95,1); // low pt production | |
288 | ||
289 | SetMSUB(14,1); // | |
290 | SetMSUB(18,1); // | |
291 | SetMSUB(29,1); // | |
292 | SetMSUB(114,1); // | |
293 | SetMSUB(115,1); // | |
294 | ||
295 | ||
296 | AtlasTuning(); | |
297 | break; | |
298 | ||
f529e69b | 299 | case kPyMbDefault: |
300 | // Minimum Bias pp-Collisions | |
301 | // | |
302 | // | |
303 | // select Pythia min. bias model | |
304 | SetMSEL(0); | |
6d2ec66d | 305 | SetMSUB(92,1); // single diffraction AB-->XB |
306 | SetMSUB(93,1); // single diffraction AB-->AX | |
f529e69b | 307 | SetMSUB(94,1); // double diffraction |
308 | SetMSUB(95,1); // low pt production | |
0a0cbcfd | 309 | break; |
310 | case kPyLhwgMb: | |
311 | // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120 | |
312 | // -> Pythia 6.3 or above is needed | |
313 | // | |
314 | SetMSEL(0); | |
315 | SetMSUB(92,1); // single diffraction AB-->XB | |
316 | SetMSUB(93,1); // single diffraction AB-->AX | |
317 | SetMSUB(94,1); // double diffraction | |
318 | SetMSUB(95,1); // low pt production | |
319 | ||
e2de0ce1 | 320 | SetMSTP(51,AliStructFuncType::PDFsetIndex(kCTEQ6ll)); // CTEQ6ll pdf |
0a0cbcfd | 321 | SetMSTP(52,2); |
322 | SetMSTP(68,1); | |
323 | SetMSTP(70,2); | |
324 | SetMSTP(81,1); // Multiple Interactions ON | |
325 | SetMSTP(82,4); // Double Gaussian Model | |
326 | SetMSTP(88,1); | |
327 | ||
328 | SetPARP(82,2.3); // [GeV] PT_min at Ref. energy | |
329 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
330 | SetPARP(84,0.5); // Core radius | |
331 | SetPARP(85,0.9); // Regulates gluon prod. mechanism | |
332 | SetPARP(90,0.2); // 2*epsilon (exponent in power law) | |
333 | ||
511db649 | 334 | break; |
8d2cd130 | 335 | case kPyMbNonDiffr: |
336 | // Minimum Bias pp-Collisions | |
337 | // | |
338 | // | |
339 | // select Pythia min. bias model | |
340 | SetMSEL(0); | |
511db649 | 341 | SetMSUB(95,1); // low pt production |
0f482ae4 | 342 | |
d7de4a67 | 343 | AtlasTuning(); |
344 | break; | |
345 | case kPyMbMSEL1: | |
346 | ConfigHeavyFlavor(); | |
347 | // Intrinsic <kT^2> | |
348 | SetMSTP(91,1);// Width (1=gaussian) primordial kT dist. inside hadrons | |
349 | SetPARP(91,1.); // <kT^2> = PARP(91,1.)^2 | |
350 | SetPARP(93,5.); // Upper cut-off | |
351 | // Set Q-quark mass | |
352 | SetPMAS(4,1,1.2); // Charm quark mass | |
353 | SetPMAS(5,1,4.78); // Beauty quark mass | |
354 | SetPARP(71,4.); // Defaut value | |
355 | // Atlas Tuning | |
e0e89f40 | 356 | AtlasTuning(); |
8d2cd130 | 357 | break; |
358 | case kPyJets: | |
359 | // | |
360 | // QCD Jets | |
361 | // | |
362 | SetMSEL(1); | |
65f2626c | 363 | // Pythia Tune A (CDF) |
364 | // | |
4167b79f | 365 | SetPARP(67,2.5); // Regulates Initial State Radiation (value from best fit to D0 dijet analysis) |
65f2626c | 366 | SetMSTP(82,4); // Double Gaussian Model |
367 | SetPARP(82,2.0); // [GeV] PT_min at Ref. energy | |
368 | SetPARP(84,0.4); // Core radius | |
369 | SetPARP(85,0.90) ; // Regulates gluon prod. mechanism | |
370 | SetPARP(86,0.95); // Regulates gluon prod. mechanism | |
371 | SetPARP(89,1800.); // [GeV] Ref. energy | |
0bd3d7c5 | 372 | SetPARP(90,0.25); // 2*epsilon (exponent in power law) |
65f2626c | 373 | break; |
8d2cd130 | 374 | case kPyDirectGamma: |
375 | SetMSEL(10); | |
376 | break; | |
adf4d898 | 377 | case kPyCharmPbPbMNR: |
378 | case kPyD0PbPbMNR: | |
90d7b703 | 379 | case kPyDPlusPbPbMNR: |
e0e89f40 | 380 | case kPyDPlusStrangePbPbMNR: |
90d7b703 | 381 | // Tuning of Pythia parameters aimed to get a resonable agreement |
382 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
383 | // c-cbar single inclusive and double differential distributions. | |
384 | // This parameter settings are meant to work with Pb-Pb collisions | |
385 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
386 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
387 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
3dc3ec94 | 388 | ConfigHeavyFlavor(); |
90d7b703 | 389 | // Intrinsic <kT> |
390 | SetMSTP(91,1); | |
391 | SetPARP(91,1.304); | |
392 | SetPARP(93,6.52); | |
90d7b703 | 393 | // Set c-quark mass |
394 | SetPMAS(4,1,1.2); | |
8d2cd130 | 395 | break; |
adf4d898 | 396 | case kPyCharmpPbMNR: |
397 | case kPyD0pPbMNR: | |
90d7b703 | 398 | case kPyDPluspPbMNR: |
e0e89f40 | 399 | case kPyDPlusStrangepPbMNR: |
90d7b703 | 400 | // Tuning of Pythia parameters aimed to get a resonable agreement |
401 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
402 | // c-cbar single inclusive and double differential distributions. | |
403 | // This parameter settings are meant to work with p-Pb collisions | |
404 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
405 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
406 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
3dc3ec94 | 407 | ConfigHeavyFlavor(); |
90d7b703 | 408 | // Intrinsic <kT> |
3dc3ec94 | 409 | SetMSTP(91,1); |
410 | SetPARP(91,1.16); | |
411 | SetPARP(93,5.8); | |
412 | ||
90d7b703 | 413 | // Set c-quark mass |
3dc3ec94 | 414 | SetPMAS(4,1,1.2); |
adf4d898 | 415 | break; |
416 | case kPyCharmppMNR: | |
417 | case kPyD0ppMNR: | |
90d7b703 | 418 | case kPyDPlusppMNR: |
e0e89f40 | 419 | case kPyDPlusStrangeppMNR: |
68504d42 | 420 | case kPyLambdacppMNR: |
90d7b703 | 421 | // Tuning of Pythia parameters aimed to get a resonable agreement |
422 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
423 | // c-cbar single inclusive and double differential distributions. | |
424 | // This parameter settings are meant to work with pp collisions | |
425 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
426 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
427 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
3dc3ec94 | 428 | ConfigHeavyFlavor(); |
90d7b703 | 429 | // Intrinsic <kT^2> |
3dc3ec94 | 430 | SetMSTP(91,1); |
431 | SetPARP(91,1.); | |
432 | SetPARP(93,5.); | |
433 | ||
90d7b703 | 434 | // Set c-quark mass |
3dc3ec94 | 435 | SetPMAS(4,1,1.2); |
adf4d898 | 436 | break; |
e0e89f40 | 437 | case kPyCharmppMNRwmi: |
438 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
439 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
440 | // c-cbar single inclusive and double differential distributions. | |
441 | // This parameter settings are meant to work with pp collisions | |
442 | // and with kCTEQ5L PDFs. | |
443 | // Added multiple interactions according to ATLAS tune settings. | |
444 | // To get a "reasonable" agreement with MNR results, events have to be | |
445 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
446 | // set to 2.76 GeV. | |
447 | // To get a "perfect" agreement with MNR results, events have to be | |
448 | // generated in four ptHard bins with the following relative | |
449 | // normalizations: | |
450 | // 2.76-3 GeV: 25% | |
451 | // 3-4 GeV: 40% | |
452 | // 4-8 GeV: 29% | |
453 | // >8 GeV: 6% | |
454 | ConfigHeavyFlavor(); | |
455 | // Intrinsic <kT^2> | |
456 | SetMSTP(91,1); | |
457 | SetPARP(91,1.); | |
458 | SetPARP(93,5.); | |
459 | ||
460 | // Set c-quark mass | |
461 | SetPMAS(4,1,1.2); | |
462 | AtlasTuning(); | |
463 | break; | |
adf4d898 | 464 | case kPyBeautyPbPbMNR: |
8d2cd130 | 465 | // Tuning of Pythia parameters aimed to get a resonable agreement |
466 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
467 | // b-bbar single inclusive and double differential distributions. | |
468 | // This parameter settings are meant to work with Pb-Pb collisions | |
469 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
470 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
471 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
3dc3ec94 | 472 | ConfigHeavyFlavor(); |
8d2cd130 | 473 | // QCD scales |
3dc3ec94 | 474 | SetPARP(67,1.0); |
475 | SetPARP(71,1.0); | |
adf4d898 | 476 | // Intrinsic <kT> |
3dc3ec94 | 477 | SetMSTP(91,1); |
478 | SetPARP(91,2.035); | |
479 | SetPARP(93,10.17); | |
8d2cd130 | 480 | // Set b-quark mass |
3dc3ec94 | 481 | SetPMAS(5,1,4.75); |
adf4d898 | 482 | break; |
483 | case kPyBeautypPbMNR: | |
484 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
485 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
486 | // b-bbar single inclusive and double differential distributions. | |
487 | // This parameter settings are meant to work with p-Pb collisions | |
488 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
489 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
490 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
3dc3ec94 | 491 | ConfigHeavyFlavor(); |
adf4d898 | 492 | // QCD scales |
3dc3ec94 | 493 | SetPARP(67,1.0); |
494 | SetPARP(71,1.0); | |
adf4d898 | 495 | // Intrinsic <kT> |
3dc3ec94 | 496 | SetMSTP(91,1); |
497 | SetPARP(91,1.60); | |
498 | SetPARP(93,8.00); | |
adf4d898 | 499 | // Set b-quark mass |
3dc3ec94 | 500 | SetPMAS(5,1,4.75); |
adf4d898 | 501 | break; |
502 | case kPyBeautyppMNR: | |
503 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
504 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
505 | // b-bbar single inclusive and double differential distributions. | |
506 | // This parameter settings are meant to work with pp collisions | |
507 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
508 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
509 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
3dc3ec94 | 510 | ConfigHeavyFlavor(); |
adf4d898 | 511 | // QCD scales |
3dc3ec94 | 512 | SetPARP(67,1.0); |
513 | SetPARP(71,1.0); | |
514 | ||
515 | // Intrinsic <kT> | |
516 | SetMSTP(91,1); | |
517 | SetPARP(91,1.); | |
518 | SetPARP(93,5.); | |
519 | ||
520 | // Set b-quark mass | |
521 | SetPMAS(5,1,4.75); | |
8d2cd130 | 522 | break; |
9dfe63b3 | 523 | case kPyBeautyJets: |
e0e89f40 | 524 | case kPyBeautyppMNRwmi: |
525 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
526 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
527 | // b-bbar single inclusive and double differential distributions. | |
528 | // This parameter settings are meant to work with pp collisions | |
529 | // and with kCTEQ5L PDFs. | |
530 | // Added multiple interactions according to ATLAS tune settings. | |
531 | // To get a "reasonable" agreement with MNR results, events have to be | |
532 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
533 | // set to 2.76 GeV. | |
534 | // To get a "perfect" agreement with MNR results, events have to be | |
535 | // generated in four ptHard bins with the following relative | |
536 | // normalizations: | |
537 | // 2.76-4 GeV: 5% | |
538 | // 4-6 GeV: 31% | |
539 | // 6-8 GeV: 28% | |
540 | // >8 GeV: 36% | |
541 | ConfigHeavyFlavor(); | |
542 | // QCD scales | |
543 | SetPARP(67,1.0); | |
544 | SetPARP(71,1.0); | |
545 | ||
546 | // Intrinsic <kT> | |
547 | SetMSTP(91,1); | |
548 | SetPARP(91,1.); | |
549 | SetPARP(93,5.); | |
550 | ||
551 | // Set b-quark mass | |
552 | SetPMAS(5,1,4.75); | |
553 | ||
554 | AtlasTuning(); | |
555 | break; | |
589380c6 | 556 | case kPyW: |
557 | ||
558 | //Inclusive production of W+/- | |
559 | SetMSEL(0); | |
560 | //f fbar -> W+ | |
561 | SetMSUB(2,1); | |
562 | // //f fbar -> g W+ | |
563 | // SetMSUB(16,1); | |
564 | // //f fbar -> gamma W+ | |
565 | // SetMSUB(20,1); | |
566 | // //f g -> f W+ | |
567 | // SetMSUB(31,1); | |
568 | // //f gamma -> f W+ | |
569 | // SetMSUB(36,1); | |
570 | ||
571 | // Initial/final parton shower on (Pythia default) | |
572 | // With parton showers on we are generating "W inclusive process" | |
573 | SetMSTP(61,1); //Initial QCD & QED showers on | |
574 | SetMSTP(71,1); //Final QCD & QED showers on | |
575 | ||
576 | break; | |
0f6ee828 | 577 | |
578 | case kPyZ: | |
579 | ||
580 | //Inclusive production of Z | |
581 | SetMSEL(0); | |
582 | //f fbar -> Z/gamma | |
583 | SetMSUB(1,1); | |
584 | ||
585 | // // f fbar -> g Z/gamma | |
586 | // SetMSUB(15,1); | |
587 | // // f fbar -> gamma Z/gamma | |
588 | // SetMSUB(19,1); | |
589 | // // f g -> f Z/gamma | |
590 | // SetMSUB(30,1); | |
591 | // // f gamma -> f Z/gamma | |
592 | // SetMSUB(35,1); | |
593 | ||
594 | //only Z included, not gamma | |
595 | SetMSTP(43,2); | |
596 | ||
597 | // Initial/final parton shower on (Pythia default) | |
598 | // With parton showers on we are generating "Z inclusive process" | |
599 | SetMSTP(61,1); //Initial QCD & QED showers on | |
600 | SetMSTP(71,1); //Final QCD & QED showers on | |
601 | ||
602 | break; | |
603 | ||
8d2cd130 | 604 | } |
605 | // | |
606 | // Initialize PYTHIA | |
efe3b1cd | 607 | // |
608 | // Select the tune | |
609 | if (itune > -1) Pytune(itune); | |
610 | ||
611 | // | |
8d2cd130 | 612 | SetMSTP(41,1); // all resonance decays switched on |
d95b55fa | 613 | Initialize("CMS","p","p",fEcms); |
03358a32 | 614 | fOmegaDalitz.Init(); |
8d2cd130 | 615 | } |
616 | ||
617 | Int_t AliPythia::CheckedLuComp(Int_t kf) | |
618 | { | |
619 | // Check Lund particle code (for debugging) | |
620 | Int_t kc=Pycomp(kf); | |
621 | printf("\n Lucomp kf,kc %d %d",kf,kc); | |
622 | return kc; | |
623 | } | |
624 | ||
20e47f08 | 625 | void AliPythia::SetNuclei(Int_t a1, Int_t a2, Int_t pdf) |
8d2cd130 | 626 | { |
627 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
628 | // The MSTP array in the PYPARS common block is used to enable and | |
629 | // select the nuclear structure functions. | |
630 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
631 | // =1: internal PYTHIA acording to MSTP(51) | |
632 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
633 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
634 | // MSTP(192) : Mass number of nucleus side 1 | |
635 | // MSTP(193) : Mass number of nucleus side 2 | |
20e47f08 | 636 | // MSTP(194) : Nuclear structure function: 0: EKS98 1:EPS08 |
8d2cd130 | 637 | SetMSTP(52,2); |
638 | SetMSTP(192, a1); | |
20e47f08 | 639 | SetMSTP(193, a2); |
640 | SetMSTP(194, pdf); | |
8d2cd130 | 641 | } |
642 | ||
643 | ||
644 | AliPythia* AliPythia::Instance() | |
645 | { | |
646 | // Set random number generator | |
647 | if (fgAliPythia) { | |
648 | return fgAliPythia; | |
649 | } else { | |
650 | fgAliPythia = new AliPythia(); | |
651 | return fgAliPythia; | |
652 | } | |
653 | } | |
654 | ||
655 | void AliPythia::PrintParticles() | |
656 | { | |
657 | // Print list of particl properties | |
658 | Int_t np = 0; | |
c31f1d37 | 659 | char* name = new char[16]; |
8d2cd130 | 660 | for (Int_t kf=0; kf<1000000; kf++) { |
661 | for (Int_t c = 1; c > -2; c-=2) { | |
8d2cd130 | 662 | Int_t kc = Pycomp(c*kf); |
663 | if (kc) { | |
664 | Float_t mass = GetPMAS(kc,1); | |
665 | Float_t width = GetPMAS(kc,2); | |
666 | Float_t tau = GetPMAS(kc,4); | |
c31f1d37 | 667 | |
8d2cd130 | 668 | Pyname(kf,name); |
669 | ||
670 | np++; | |
671 | ||
672 | printf("\n mass, width, tau: %6d %s %10.3f %10.3e %10.3e", | |
673 | c*kf, name, mass, width, tau); | |
674 | } | |
675 | } | |
676 | } | |
677 | printf("\n Number of particles %d \n \n", np); | |
678 | } | |
679 | ||
680 | void AliPythia::ResetDecayTable() | |
681 | { | |
682 | // Set default values for pythia decay switches | |
683 | Int_t i; | |
684 | for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
685 | for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
686 | } | |
687 | ||
688 | void AliPythia::SetDecayTable() | |
689 | { | |
690 | // Set default values for pythia decay switches | |
691 | // | |
692 | Int_t i; | |
693 | for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
694 | for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
695 | } | |
696 | ||
697 | void AliPythia::Pyclus(Int_t& njet) | |
698 | { | |
699 | // Call Pythia clustering algorithm | |
700 | // | |
701 | pyclus(njet); | |
702 | } | |
703 | ||
704 | void AliPythia::Pycell(Int_t& njet) | |
705 | { | |
706 | // Call Pythia jet reconstruction algorithm | |
707 | // | |
708 | pycell(njet); | |
709 | } | |
710 | ||
452af8c7 | 711 | void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax) |
712 | { | |
713 | // Call Pythia jet reconstruction algorithm | |
714 | // | |
452af8c7 | 715 | pyshow(ip1, ip2, qmax); |
716 | } | |
717 | ||
718 | void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez) | |
719 | { | |
720 | pyrobo(imi, ima, the, phi, bex, bey, bez); | |
721 | } | |
722 | ||
694b39f9 | 723 | void AliPythia::Pytune(Int_t itune) |
724 | { | |
c5e2801a | 725 | /* |
726 | C | |
727 | C ITUNE NAME (detailed descriptions below) | |
728 | C 0 Default : No settings changed => linked Pythia version's defaults. | |
729 | C ====== Old UE, Q2-ordered showers ========================================== | |
730 | C 100 A : Rick Field's CDF Tune A | |
731 | C 101 AW : Rick Field's CDF Tune AW | |
732 | C 102 BW : Rick Field's CDF Tune BW | |
733 | C 103 DW : Rick Field's CDF Tune DW | |
734 | C 104 DWT : Rick Field's CDF Tune DW with slower UE energy scaling | |
735 | C 105 QW : Rick Field's CDF Tune QW (NB: needs CTEQ6.1M pdfs externally) | |
736 | C 106 ATLAS-DC2: Arthur Moraes' (old) ATLAS tune (ATLAS DC2 / Rome) | |
737 | C 107 ACR : Tune A modified with annealing CR | |
738 | C 108 D6 : Rick Field's CDF Tune D6 (NB: needs CTEQ6L pdfs externally) | |
739 | C 109 D6T : Rick Field's CDF Tune D6T (NB: needs CTEQ6L pdfs externally) | |
740 | C ====== Intermediate Models ================================================= | |
741 | C 200 IM 1 : Intermediate model: new UE, Q2-ordered showers, annealing CR | |
742 | C 201 APT : Tune A modified to use pT-ordered final-state showers | |
743 | C ====== New UE, interleaved pT-ordered showers, annealing CR ================ | |
744 | C 300 S0 : Sandhoff-Skands Tune 0 | |
745 | C 301 S1 : Sandhoff-Skands Tune 1 | |
746 | C 302 S2 : Sandhoff-Skands Tune 2 | |
747 | C 303 S0A : S0 with "Tune A" UE energy scaling | |
748 | C 304 NOCR : New UE "best try" without colour reconnections | |
749 | C 305 Old : New UE, original (primitive) colour reconnections | |
750 | C 306 ATLAS-CSC: Arthur Moraes' (new) ATLAS tune (needs CTEQ6L externally) | |
751 | C ======= The Uppsala models ================================================= | |
752 | C ( NB! must be run with special modified Pythia 6.215 version ) | |
753 | C ( available from http://www.isv.uu.se/thep/MC/scigal/ ) | |
754 | C 400 GAL 0 : Generalized area-law model. Old parameters | |
755 | C 401 SCI 0 : Soft-Colour-Interaction model. Old parameters | |
756 | C 402 GAL 1 : Generalized area-law model. Tevatron MB retuned (Skands) | |
757 | */ | |
694b39f9 | 758 | pytune(itune); |
759 | } | |
760 | ||
9b61ba2a | 761 | void AliPythia::Py2ent(Int_t idx, Int_t pdg1, Int_t pdg2, Double_t p){ |
762 | // Inset 2-parton system at line idx | |
763 | py2ent(idx, pdg1, pdg2, p); | |
764 | } | |
452af8c7 | 765 | |
766 | ||
32c8e463 | 767 | void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod, Float_t zmax, Int_t ngmax) |
0f482ae4 | 768 | { |
769 | // Initializes | |
770 | // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann | |
771 | // (2) The nuclear geometry using the Glauber Model | |
772 | // | |
6b435cde | 773 | |
18b7a4a1 | 774 | fGlauber = AliFastGlauber::Instance(); |
0f482ae4 | 775 | fGlauber->Init(2); |
776 | fGlauber->SetCentralityClass(cMin, cMax); | |
777 | ||
778 | fQuenchingWeights = new AliQuenchingWeights(); | |
779 | fQuenchingWeights->InitMult(); | |
86b6ad68 | 780 | fQuenchingWeights->SetK(k); |
0f482ae4 | 781 | fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod)); |
32c8e463 | 782 | fNGmax = ngmax; |
783 | fZmax = zmax; | |
784 | ||
0f482ae4 | 785 | } |
786 | ||
787 | ||
452af8c7 | 788 | void AliPythia::Quench() |
789 | { | |
790 | // | |
791 | // | |
792 | // Simple Jet Quenching routine: | |
793 | // ============================= | |
794 | // The jet formed by all final state partons radiated by the parton created | |
0f482ae4 | 795 | // in the hard collisions is quenched by a factor (1-z) using light cone variables in |
796 | // the initial parton reference frame: | |
452af8c7 | 797 | // (E + p_z)new = (1-z) (E + p_z)old |
798 | // | |
0f482ae4 | 799 | // |
800 | // | |
801 | // | |
452af8c7 | 802 | // The lost momentum is first balanced by one gluon with virtuality > 0. |
803 | // Subsequently the gluon splits to yield two gluons with E = p. | |
804 | // | |
0f482ae4 | 805 | // |
806 | // | |
4e383037 | 807 | static Float_t eMean = 0.; |
808 | static Int_t icall = 0; | |
0f482ae4 | 809 | |
c2c598a3 | 810 | Double_t p0[4][5]; |
811 | Double_t p1[4][5]; | |
812 | Double_t p2[4][5]; | |
813 | Int_t klast[4] = {-1, -1, -1, -1}; | |
452af8c7 | 814 | |
815 | Int_t numpart = fPyjets->N; | |
86b6ad68 | 816 | Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0., phi = 0.; |
c2c598a3 | 817 | Double_t pxq[4], pyq[4], pzq[4], eq[4], yq[4], mq[4], pq[4], phiq[4], thetaq[4], ptq[4]; |
818 | Bool_t quenched[4]; | |
b280c4cc | 819 | Double_t wjtKick[4]; |
c2c598a3 | 820 | Int_t nGluon[4]; |
86b6ad68 | 821 | Int_t qPdg[4]; |
0f482ae4 | 822 | Int_t imo, kst, pdg; |
b280c4cc | 823 | |
511db649 | 824 | // |
c2c598a3 | 825 | // Sore information about Primary partons |
826 | // | |
827 | // j = | |
828 | // 0, 1 partons from hard scattering | |
829 | // 2, 3 partons from initial state radiation | |
830 | // | |
831 | for (Int_t i = 2; i <= 7; i++) { | |
832 | Int_t j = 0; | |
833 | // Skip gluons that participate in hard scattering | |
834 | if (i == 4 || i == 5) continue; | |
835 | // Gluons from hard Scattering | |
836 | if (i == 6 || i == 7) { | |
837 | j = i - 6; | |
838 | pxq[j] = fPyjets->P[0][i]; | |
839 | pyq[j] = fPyjets->P[1][i]; | |
840 | pzq[j] = fPyjets->P[2][i]; | |
841 | eq[j] = fPyjets->P[3][i]; | |
842 | mq[j] = fPyjets->P[4][i]; | |
843 | } else { | |
844 | // Gluons from initial state radiation | |
845 | // | |
846 | // Obtain 4-momentum vector from difference between original parton and parton after gluon | |
847 | // radiation. Energy is calculated independently because initial state radition does not | |
848 | // conserve strictly momentum and energy for each partonic system independently. | |
849 | // | |
850 | // Not very clean. Should be improved ! | |
851 | // | |
852 | // | |
853 | j = i; | |
854 | pxq[j] = fPyjets->P[0][i] - fPyjets->P[0][i+2]; | |
855 | pyq[j] = fPyjets->P[1][i] - fPyjets->P[1][i+2]; | |
856 | pzq[j] = fPyjets->P[2][i] - fPyjets->P[2][i+2]; | |
857 | mq[j] = fPyjets->P[4][i]; | |
858 | eq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j] + mq[j] * mq[j]); | |
859 | } | |
860 | // | |
861 | // Calculate some kinematic variables | |
511db649 | 862 | // |
4e383037 | 863 | yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14)); |
0f482ae4 | 864 | pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]); |
865 | phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]); | |
866 | ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]); | |
867 | thetaq[j] = TMath::ATan2(ptq[j], pzq[j]); | |
86b6ad68 | 868 | qPdg[j] = fPyjets->K[1][i]; |
869 | } | |
870 | ||
871 | Double_t int0[4]; | |
872 | Double_t int1[4]; | |
86b6ad68 | 873 | |
b280c4cc | 874 | fGlauber->GetI0I1ForPythiaAndXY(4, phiq, int0, int1, fXJet, fYJet, 15.); |
875 | ||
86b6ad68 | 876 | for (Int_t j = 0; j < 4; j++) { |
c2c598a3 | 877 | // |
878 | // Quench only central jets and with E > 10. | |
879 | // | |
86b6ad68 | 880 | |
881 | ||
882 | Int_t itype = (qPdg[j] == 21) ? 2 : 1; | |
883 | Double_t eloss = fQuenchingWeights->GetELossRandomKFast(itype, int0[j], int1[j], eq[j]); | |
884 | ||
c2c598a3 | 885 | if (TMath::Abs(yq[j]) > 2.5 || eq[j] < 10.) { |
b280c4cc | 886 | fZQuench[j] = 0.; |
0f482ae4 | 887 | } else { |
c2c598a3 | 888 | if (eq[j] > 40. && TMath::Abs(yq[j]) < 0.5) { |
4e383037 | 889 | icall ++; |
890 | eMean += eloss; | |
891 | } | |
0f482ae4 | 892 | // |
893 | // Extra pt | |
86b6ad68 | 894 | Double_t l = fQuenchingWeights->CalcLk(int0[j], int1[j]); |
895 | wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->CalcQk(int0[j], int1[j])); | |
0f482ae4 | 896 | // |
897 | // Fractional energy loss | |
b280c4cc | 898 | fZQuench[j] = eloss / eq[j]; |
0f482ae4 | 899 | // |
900 | // Avoid complete loss | |
901 | // | |
1044c4d8 | 902 | if (fZQuench[j] > fZmax) fZQuench[j] = fZmax; |
0f482ae4 | 903 | // |
904 | // Some debug printing | |
86b6ad68 | 905 | |
906 | ||
bf9bb016 | 907 | // 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", |
908 | // j, itype, eq[j], phiq[j], l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]); | |
4e383037 | 909 | |
b280c4cc | 910 | // fZQuench[j] = 0.8; |
911 | // while (fZQuench[j] >= 0.95) fZQuench[j] = gRandom->Exp(0.2); | |
0f482ae4 | 912 | } |
4e383037 | 913 | |
b280c4cc | 914 | quenched[j] = (fZQuench[j] > 0.01); |
4e383037 | 915 | } // primary partons |
c2c598a3 | 916 | |
b280c4cc | 917 | |
918 | ||
6e90ad26 | 919 | Double_t pNew[1000][4]; |
920 | Int_t kNew[1000]; | |
921 | Int_t icount = 0; | |
b280c4cc | 922 | Double_t zquench[4]; |
923 | ||
6e90ad26 | 924 | // |
4e383037 | 925 | // System Loop |
c2c598a3 | 926 | for (Int_t isys = 0; isys < 4; isys++) { |
6e90ad26 | 927 | // Skip to next system if not quenched. |
4e383037 | 928 | if (!quenched[isys]) continue; |
929 | ||
b280c4cc | 930 | nGluon[isys] = 1 + Int_t(fZQuench[isys] / (1. - fZQuench[isys])); |
32c8e463 | 931 | if (nGluon[isys] > fNGmax) nGluon[isys] = fNGmax; |
b280c4cc | 932 | zquench[isys] = 1. - TMath::Power(1. - fZQuench[isys], 1./Double_t(nGluon[isys])); |
4e383037 | 933 | wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys])); |
0f482ae4 | 934 | |
4e383037 | 935 | |
936 | ||
937 | Int_t igMin = -1; | |
938 | Int_t igMax = -1; | |
939 | Double_t pg[4] = {0., 0., 0., 0.}; | |
940 | ||
941 | // | |
942 | // Loop on radiation events | |
943 | ||
944 | for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) { | |
6e90ad26 | 945 | while (1) { |
946 | icount = 0; | |
947 | for (Int_t k = 0; k < 4; k++) | |
948 | { | |
949 | p0[isys][k] = 0.; | |
950 | p1[isys][k] = 0.; | |
951 | p2[isys][k] = 0.; | |
952 | } | |
953 | // Loop over partons | |
954 | for (Int_t i = 0; i < numpart; i++) | |
955 | { | |
956 | imo = fPyjets->K[2][i]; | |
957 | kst = fPyjets->K[0][i]; | |
958 | pdg = fPyjets->K[1][i]; | |
959 | ||
960 | ||
961 | ||
0f482ae4 | 962 | // Quarks and gluons only |
6e90ad26 | 963 | if (pdg != 21 && TMath::Abs(pdg) > 6) continue; |
0f482ae4 | 964 | // Particles from hard scattering only |
c2c598a3 | 965 | |
6e90ad26 | 966 | if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1]; |
c2c598a3 | 967 | Int_t imom = imo % 1000; |
968 | if ((isys == 0 || isys == 1) && ((imom != (isys + 7)))) continue; | |
969 | if ((isys == 2 || isys == 3) && ((imom != (isys + 1)))) continue; | |
970 | ||
6e90ad26 | 971 | |
0f482ae4 | 972 | // Skip comment lines |
6e90ad26 | 973 | if (kst != 1 && kst != 2) continue; |
0f482ae4 | 974 | // |
975 | // Parton kinematic | |
6e90ad26 | 976 | px = fPyjets->P[0][i]; |
977 | py = fPyjets->P[1][i]; | |
978 | pz = fPyjets->P[2][i]; | |
979 | e = fPyjets->P[3][i]; | |
980 | m = fPyjets->P[4][i]; | |
981 | pt = TMath::Sqrt(px * px + py * py); | |
982 | p = TMath::Sqrt(px * px + py * py + pz * pz); | |
983 | phi = TMath::Pi() + TMath::ATan2(-py, -px); | |
984 | theta = TMath::ATan2(pt, pz); | |
985 | ||
0f482ae4 | 986 | // |
c2c598a3 | 987 | // Save 4-momentum sum for balancing |
988 | Int_t index = isys; | |
6e90ad26 | 989 | |
990 | p0[index][0] += px; | |
991 | p0[index][1] += py; | |
992 | p0[index][2] += pz; | |
993 | p0[index][3] += e; | |
6e90ad26 | 994 | |
995 | klast[index] = i; | |
996 | ||
0f482ae4 | 997 | // |
998 | // Fractional energy loss | |
b280c4cc | 999 | Double_t z = zquench[index]; |
4e383037 | 1000 | |
c2c598a3 | 1001 | |
4e383037 | 1002 | // Don't fully quench radiated gluons |
1003 | // | |
1004 | if (imo > 1000) { | |
1005 | // This small factor makes sure that the gluons are not too close in phase space to avoid recombination | |
1006 | // | |
1007 | ||
c2c598a3 | 1008 | z = 0.02; |
4e383037 | 1009 | } |
c2c598a3 | 1010 | // printf("z: %d %f\n", imo, z); |
1011 | ||
4e383037 | 1012 | |
1013 | // | |
6e90ad26 | 1014 | |
1015 | // | |
1016 | // | |
1017 | // Transform into frame in which initial parton is along z-axis | |
1018 | // | |
1019 | TVector3 v(px, py, pz); | |
1020 | v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]); | |
1021 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z(); | |
1022 | ||
1023 | Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys); | |
1024 | Double_t mt2 = jt * jt + m * m; | |
1025 | Double_t zmax = 1.; | |
1026 | // | |
1027 | // Kinematic limit on z | |
1028 | // | |
4e383037 | 1029 | if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt); |
6e90ad26 | 1030 | // |
1031 | // Change light-cone kinematics rel. to initial parton | |
1032 | // | |
1033 | Double_t eppzOld = e + pl; | |
1034 | Double_t empzOld = e - pl; | |
1035 | ||
1036 | Double_t eppzNew = (1. - z) * eppzOld; | |
1037 | Double_t empzNew = empzOld - mt2 * z / eppzOld; | |
1038 | Double_t eNew = 0.5 * (eppzNew + empzNew); | |
1039 | Double_t plNew = 0.5 * (eppzNew - empzNew); | |
1040 | ||
1041 | Double_t jtNew; | |
1042 | // | |
1043 | // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0 | |
1044 | Double_t mt2New = eppzNew * empzNew; | |
1045 | if (mt2New < 1.e-8) mt2New = 0.; | |
4e383037 | 1046 | if (z < zmax) { |
1047 | if (m * m > mt2New) { | |
1048 | // | |
1049 | // This should not happen | |
1050 | // | |
1051 | Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew); | |
1052 | jtNew = 0; | |
1053 | } else { | |
1054 | jtNew = TMath::Sqrt(mt2New - m * m); | |
1055 | } | |
6e90ad26 | 1056 | } else { |
4e383037 | 1057 | // If pT is to small (probably a leading massive particle) we scale only the energy |
1058 | // This can cause negative masses of the radiated gluon | |
1059 | // Let's hope for the best ... | |
1060 | jtNew = jt; | |
1061 | eNew = TMath::Sqrt(plNew * plNew + mt2); | |
1062 | ||
6e90ad26 | 1063 | } |
6e90ad26 | 1064 | // |
1065 | // Calculate new px, py | |
1066 | // | |
b07be423 | 1067 | Double_t pxNew = 0; |
1068 | Double_t pyNew = 0; | |
6e90ad26 | 1069 | |
b07be423 | 1070 | if (jt>0) { |
6b118b3c | 1071 | pxNew = jtNew / jt * pxs; |
1072 | pyNew = jtNew / jt * pys; | |
b07be423 | 1073 | } |
6e90ad26 | 1074 | // Double_t dpx = pxs - pxNew; |
1075 | // Double_t dpy = pys - pyNew; | |
1076 | // Double_t dpz = pl - plNew; | |
1077 | // Double_t de = e - eNew; | |
1078 | // Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz; | |
1079 | // printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew); | |
1080 | // printf("New mass (2) %e %e \n", pxNew, pyNew); | |
1081 | // | |
1082 | // Rotate back | |
1083 | // | |
1084 | TVector3 w(pxNew, pyNew, plNew); | |
1085 | w.RotateY(thetaq[index]); w.RotateZ(phiq[index]); | |
1086 | pxNew = w.X(); pyNew = w.Y(); plNew = w.Z(); | |
1087 | ||
1088 | p1[index][0] += pxNew; | |
1089 | p1[index][1] += pyNew; | |
1090 | p1[index][2] += plNew; | |
1091 | p1[index][3] += eNew; | |
1092 | // | |
1093 | // Updated 4-momentum vectors | |
1094 | // | |
1095 | pNew[icount][0] = pxNew; | |
1096 | pNew[icount][1] = pyNew; | |
1097 | pNew[icount][2] = plNew; | |
1098 | pNew[icount][3] = eNew; | |
1099 | kNew[icount] = i; | |
1100 | icount++; | |
1101 | } // parton loop | |
0f482ae4 | 1102 | // |
6e90ad26 | 1103 | // Check if there was phase-space for quenching |
0f482ae4 | 1104 | // |
0f482ae4 | 1105 | |
6e90ad26 | 1106 | if (icount == 0) quenched[isys] = kFALSE; |
1107 | if (!quenched[isys]) break; | |
1108 | ||
1109 | for (Int_t j = 0; j < 4; j++) | |
1110 | { | |
1111 | p2[isys][j] = p0[isys][j] - p1[isys][j]; | |
1112 | } | |
1113 | 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 | 1114 | if (p2[isys][4] > 0.) { |
1115 | p2[isys][4] = TMath::Sqrt(p2[isys][4]); | |
1116 | break; | |
1117 | } else { | |
b280c4cc | 1118 | printf("Warning negative mass squared in system %d %f ! \n", isys, zquench[isys]); |
4e383037 | 1119 | 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 | 1120 | if (p2[isys][4] < -0.01) { |
4e383037 | 1121 | printf("Negative mass squared !\n"); |
1122 | // Here we have to put the gluon back to mass shell | |
1123 | // This will lead to a small energy imbalance | |
1124 | p2[isys][4] = 0.; | |
1125 | p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]); | |
1126 | break; | |
6e90ad26 | 1127 | } else { |
1128 | p2[isys][4] = 0.; | |
1129 | break; | |
1130 | } | |
1131 | } | |
6e90ad26 | 1132 | /* |
6e90ad26 | 1133 | zHeavy *= 0.98; |
1134 | printf("zHeavy lowered to %f\n", zHeavy); | |
1135 | if (zHeavy < 0.01) { | |
1136 | printf("No success ! \n"); | |
1137 | icount = 0; | |
1138 | quenched[isys] = kFALSE; | |
1139 | break; | |
1140 | } | |
4e383037 | 1141 | */ |
1142 | } // iteration on z (while) | |
1143 | ||
6e90ad26 | 1144 | // Update event record |
1145 | for (Int_t k = 0; k < icount; k++) { | |
1146 | // 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] ); | |
1147 | fPyjets->P[0][kNew[k]] = pNew[k][0]; | |
1148 | fPyjets->P[1][kNew[k]] = pNew[k][1]; | |
1149 | fPyjets->P[2][kNew[k]] = pNew[k][2]; | |
1150 | fPyjets->P[3][kNew[k]] = pNew[k][3]; | |
0f482ae4 | 1151 | } |
4e383037 | 1152 | // |
1153 | // Add the gluons | |
1154 | // | |
1155 | Int_t ish = 0; | |
1837e95c | 1156 | Int_t iGlu; |
4e383037 | 1157 | if (!quenched[isys]) continue; |
0f482ae4 | 1158 | // |
1159 | // Last parton from shower i | |
4e383037 | 1160 | Int_t in = klast[isys]; |
0f482ae4 | 1161 | // |
1162 | // Continue if no parton in shower i selected | |
1163 | if (in == -1) continue; | |
1164 | // | |
1165 | // If this is the second initial parton and it is behind the first move pointer by previous ish | |
4e383037 | 1166 | if (isys == 1 && klast[1] > klast[0]) in += ish; |
0f482ae4 | 1167 | // |
1168 | // Starting index | |
452af8c7 | 1169 | |
4e383037 | 1170 | // jmin = in - 1; |
0f482ae4 | 1171 | // How many additional gluons will be generated |
1172 | ish = 1; | |
4e383037 | 1173 | if (p2[isys][4] > 0.05) ish = 2; |
0f482ae4 | 1174 | // |
1175 | // Position of gluons | |
4e383037 | 1176 | iGlu = numpart; |
1177 | if (iglu == 0) igMin = iGlu; | |
1178 | igMax = iGlu; | |
0f482ae4 | 1179 | numpart += ish; |
1180 | (fPyjets->N) += ish; | |
4e383037 | 1181 | |
0f482ae4 | 1182 | if (ish == 1) { |
4e383037 | 1183 | fPyjets->P[0][iGlu] = p2[isys][0]; |
1184 | fPyjets->P[1][iGlu] = p2[isys][1]; | |
1185 | fPyjets->P[2][iGlu] = p2[isys][2]; | |
1186 | fPyjets->P[3][iGlu] = p2[isys][3]; | |
1187 | fPyjets->P[4][iGlu] = p2[isys][4]; | |
0f482ae4 | 1188 | |
4e383037 | 1189 | fPyjets->K[0][iGlu] = 1; |
1190 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1; | |
0f482ae4 | 1191 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 1192 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1193 | fPyjets->K[3][iGlu] = -1; |
1194 | fPyjets->K[4][iGlu] = -1; | |
4e383037 | 1195 | |
1196 | pg[0] += p2[isys][0]; | |
1197 | pg[1] += p2[isys][1]; | |
1198 | pg[2] += p2[isys][2]; | |
1199 | pg[3] += p2[isys][3]; | |
0f482ae4 | 1200 | } else { |
1201 | // | |
1202 | // Split gluon in rest frame. | |
1203 | // | |
4e383037 | 1204 | Double_t bx = p2[isys][0] / p2[isys][3]; |
1205 | Double_t by = p2[isys][1] / p2[isys][3]; | |
1206 | Double_t bz = p2[isys][2] / p2[isys][3]; | |
1207 | Double_t pst = p2[isys][4] / 2.; | |
0f482ae4 | 1208 | // |
1209 | // Isotropic decay ???? | |
1210 | Double_t cost = 2. * gRandom->Rndm() - 1.; | |
60e55aee | 1211 | Double_t sint = TMath::Sqrt((1.-cost)*(1.+cost)); |
2ab330c9 | 1212 | Double_t phis = 2. * TMath::Pi() * gRandom->Rndm(); |
0f482ae4 | 1213 | |
1214 | Double_t pz1 = pst * cost; | |
1215 | Double_t pz2 = -pst * cost; | |
1216 | Double_t pt1 = pst * sint; | |
1217 | Double_t pt2 = -pst * sint; | |
2ab330c9 | 1218 | Double_t px1 = pt1 * TMath::Cos(phis); |
1219 | Double_t py1 = pt1 * TMath::Sin(phis); | |
1220 | Double_t px2 = pt2 * TMath::Cos(phis); | |
1221 | Double_t py2 = pt2 * TMath::Sin(phis); | |
0f482ae4 | 1222 | |
1223 | fPyjets->P[0][iGlu] = px1; | |
1224 | fPyjets->P[1][iGlu] = py1; | |
1225 | fPyjets->P[2][iGlu] = pz1; | |
1226 | fPyjets->P[3][iGlu] = pst; | |
1227 | fPyjets->P[4][iGlu] = 0.; | |
1228 | ||
4e383037 | 1229 | fPyjets->K[0][iGlu] = 1 ; |
0f482ae4 | 1230 | fPyjets->K[1][iGlu] = 21; |
4e383037 | 1231 | fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1232 | fPyjets->K[3][iGlu] = -1; |
1233 | fPyjets->K[4][iGlu] = -1; | |
1234 | ||
1235 | fPyjets->P[0][iGlu+1] = px2; | |
1236 | fPyjets->P[1][iGlu+1] = py2; | |
1237 | fPyjets->P[2][iGlu+1] = pz2; | |
1238 | fPyjets->P[3][iGlu+1] = pst; | |
1239 | fPyjets->P[4][iGlu+1] = 0.; | |
1240 | ||
4e383037 | 1241 | fPyjets->K[0][iGlu+1] = 1; |
1242 | if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1; | |
0f482ae4 | 1243 | fPyjets->K[1][iGlu+1] = 21; |
4e383037 | 1244 | fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000; |
0f482ae4 | 1245 | fPyjets->K[3][iGlu+1] = -1; |
1246 | fPyjets->K[4][iGlu+1] = -1; | |
1247 | SetMSTU(1,0); | |
1248 | SetMSTU(2,0); | |
1249 | // | |
1250 | // Boost back | |
1251 | // | |
1252 | Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz); | |
1253 | } | |
4e383037 | 1254 | /* |
1255 | for (Int_t ig = iGlu; ig < iGlu+ish; ig++) { | |
1256 | Double_t px, py, pz; | |
1257 | px = fPyjets->P[0][ig]; | |
1258 | py = fPyjets->P[1][ig]; | |
1259 | pz = fPyjets->P[2][ig]; | |
1260 | TVector3 v(px, py, pz); | |
1261 | v.RotateZ(-phiq[isys]); | |
1262 | v.RotateY(-thetaq[isys]); | |
1263 | Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z(); | |
1264 | Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1265 | Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r)); | |
1266 | if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.); | |
1267 | Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
1268 | pxs += jtKick * TMath::Cos(phiKick); | |
1269 | pys += jtKick * TMath::Sin(phiKick); | |
1270 | TVector3 w(pxs, pys, pzs); | |
1271 | w.RotateY(thetaq[isys]); | |
1272 | w.RotateZ(phiq[isys]); | |
1273 | fPyjets->P[0][ig] = w.X(); | |
1274 | fPyjets->P[1][ig] = w.Y(); | |
1275 | fPyjets->P[2][ig] = w.Z(); | |
1276 | fPyjets->P[2][ig] = w.Mag(); | |
1277 | } | |
1278 | */ | |
1279 | } // kGluon | |
1280 | ||
6e90ad26 | 1281 | |
4e383037 | 1282 | // Check energy conservation |
0f482ae4 | 1283 | Double_t pxs = 0.; |
1284 | Double_t pys = 0.; | |
1285 | Double_t pzs = 0.; | |
1286 | Double_t es = 14000.; | |
1287 | ||
1288 | for (Int_t i = 0; i < numpart; i++) | |
1289 | { | |
1290 | kst = fPyjets->K[0][i]; | |
1291 | if (kst != 1 && kst != 2) continue; | |
1292 | pxs += fPyjets->P[0][i]; | |
1293 | pys += fPyjets->P[1][i]; | |
1294 | pzs += fPyjets->P[2][i]; | |
1295 | es -= fPyjets->P[3][i]; | |
1296 | } | |
1297 | if (TMath::Abs(pxs) > 1.e-2 || | |
1298 | TMath::Abs(pys) > 1.e-2 || | |
1299 | TMath::Abs(pzs) > 1.e-1) { | |
1300 | printf("%e %e %e %e\n", pxs, pys, pzs, es); | |
4e383037 | 1301 | // Fatal("Quench()", "4-Momentum non-conservation"); |
452af8c7 | 1302 | } |
4e383037 | 1303 | |
1304 | } // end quenching loop (systems) | |
6e90ad26 | 1305 | // Clean-up |
0f482ae4 | 1306 | for (Int_t i = 0; i < numpart; i++) |
1307 | { | |
4e383037 | 1308 | imo = fPyjets->K[2][i]; |
1309 | if (imo > 1000) { | |
1310 | fPyjets->K[2][i] = fPyjets->K[2][i] % 1000; | |
1311 | } | |
0f482ae4 | 1312 | } |
4e383037 | 1313 | // this->Pylist(1); |
0f482ae4 | 1314 | } // end quench |
90d7b703 | 1315 | |
992f2843 | 1316 | |
1317 | void AliPythia::Pyquen(Double_t a, Int_t ibf, Double_t b) | |
1318 | { | |
1319 | // Igor Lokthine's quenching routine | |
12cb0bc0 | 1320 | // http://lokhtin.web.cern.ch/lokhtin/pyquen/pyquen.txt |
1321 | ||
992f2843 | 1322 | pyquen(a, ibf, b); |
1323 | } | |
b280c4cc | 1324 | |
12cb0bc0 | 1325 | void AliPythia::SetPyquenParameters(Double_t t0, Double_t tau0, Int_t nf, Int_t iengl, Int_t iangl) |
1326 | { | |
1327 | // Set the parameters for the PYQUEN package. | |
1328 | // See comments in PyquenCommon.h | |
1329 | ||
1330 | ||
1331 | PYQPAR.t0 = t0; | |
1332 | PYQPAR.tau0 = tau0; | |
1333 | PYQPAR.nf = nf; | |
1334 | PYQPAR.iengl = iengl; | |
1335 | PYQPAR.iangl = iangl; | |
1336 | } | |
1337 | ||
1338 | ||
16a82508 | 1339 | void AliPythia::Pyevnw() |
1340 | { | |
1341 | // New multiple interaction scenario | |
1342 | pyevnw(); | |
1343 | } | |
1344 | ||
cd07c39b | 1345 | void AliPythia::Pyshowq(Int_t ip1, Int_t ip2, Double_t qmax) |
1346 | { | |
1347 | // Call medium-modified Pythia jet reconstruction algorithm | |
1348 | // | |
1349 | pyshowq(ip1, ip2, qmax); | |
1350 | } | |
6c43eccb | 1351 | void AliPythia::Qpygin0() |
1352 | { | |
1353 | // New multiple interaction scenario | |
1354 | qpygin0(); | |
1355 | } | |
cd07c39b | 1356 | |
b280c4cc | 1357 | void AliPythia::GetQuenchingParameters(Double_t& xp, Double_t& yp, Double_t z[4]) |
1358 | { | |
1359 | // Return event specific quenching parameters | |
1360 | xp = fXJet; | |
1361 | yp = fYJet; | |
1362 | for (Int_t i = 0; i < 4; i++) z[i] = fZQuench[i]; | |
1363 | ||
1364 | } | |
1365 | ||
3dc3ec94 | 1366 | void AliPythia::ConfigHeavyFlavor() |
1367 | { | |
1368 | // | |
1369 | // Default configuration for Heavy Flavor production | |
1370 | // | |
1371 | // All QCD processes | |
1372 | // | |
1373 | SetMSEL(1); | |
1374 | ||
ef185c83 | 1375 | |
1376 | if (fItune < 0) { | |
1377 | // No multiple interactions | |
1378 | SetMSTP(81,0); | |
1379 | SetPARP(81, 0.); | |
1380 | SetPARP(82, 0.); | |
1381 | } | |
3dc3ec94 | 1382 | // Initial/final parton shower on (Pythia default) |
1383 | SetMSTP(61,1); | |
1384 | SetMSTP(71,1); | |
1385 | ||
1386 | // 2nd order alpha_s | |
1387 | SetMSTP(2,2); | |
1388 | ||
1389 | // QCD scales | |
1390 | SetMSTP(32,2); | |
1391 | SetPARP(34,1.0); | |
1392 | } | |
e0e89f40 | 1393 | |
1394 | void AliPythia::AtlasTuning() | |
1395 | { | |
1396 | // | |
1397 | // Configuration for the ATLAS tuning | |
0bd3d7c5 | 1398 | if (fItune > -1) return; |
1399 | printf("ATLAS TUNE \n"); | |
1400 | ||
1401 | SetMSTP(51, AliStructFuncType::PDFsetIndex(kCTEQ5L)); // CTEQ5L pdf | |
1402 | SetMSTP(81,1); // Multiple Interactions ON | |
1403 | SetMSTP(82,4); // Double Gaussian Model | |
1404 | SetPARP(81,1.9); // Min. pt for multiple interactions (default in 6.2-14) | |
1405 | SetPARP(82,1.8); // [GeV] PT_min at Ref. energy | |
1406 | SetPARP(89,1000.); // [GeV] Ref. energy | |
1407 | SetPARP(90,0.16); // 2*epsilon (exponent in power law) | |
1408 | SetPARP(83,0.5); // Core density in proton matter distribution (def.value) | |
1409 | SetPARP(84,0.5); // Core radius | |
1410 | SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
1411 | SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
1412 | SetPARP(67,1); // Regulates Initial State Radiation | |
1413 | } | |
1414 | ||
1415 | void AliPythia::AtlasTuning_MC09() | |
1416 | { | |
1417 | // | |
1418 | // Configuration for the ATLAS tuning | |
1419 | if (fItune > -1) return; | |
1420 | printf("ATLAS New TUNE MC09\n"); | |
1421 | SetMSTP(81,21); // treatment for MI, ISR, FSR and beam remnants: MI on, new model | |
1422 | SetMSTP(82, 4); // Double Gaussian Model | |
1423 | SetMSTP(52, 2); // External PDF | |
1424 | SetMSTP(51, 20650); // MRST LO* | |
1425 | ||
1426 | ||
1427 | SetMSTP(70, 0); // (was 2: def manual 1, def code 0) virtuality scale for ISR | |
1428 | SetMSTP(72, 1); // (was 0: def 1) maximum scale for FSR | |
1429 | SetMSTP(88, 1); // (was 0: def 1) strategy for qq junction to di-quark or baryon in beam remnant | |
1430 | SetMSTP(90, 0); // (was 1: def 0) strategy of compensate the primordial kT | |
1431 | ||
1432 | SetPARP(78, 0.3); // the amount of color reconnection in the final state | |
1433 | SetPARP(80, 0.1); // probability of color partons kicked out from beam remnant | |
1434 | SetPARP(82, 2.3); // [GeV] PT_min at Ref. energy | |
1435 | SetPARP(83, 0.8); // Core density in proton matter distribution (def.value) | |
1436 | SetPARP(84, 0.7); // Core radius | |
1437 | SetPARP(90, 0.25); // 2*epsilon (exponent in power law) | |
1438 | SetPARJ(81, 0.29); // (was 0.14: def 0.29) Labmda value in running alpha_s for parton showers | |
1439 | ||
1440 | SetMSTP(95, 6); | |
1441 | SetPARJ(41, 0.3); // a and b parameters of the symmm. Lund FF | |
1442 | SetPARJ(42, 0.58); | |
1443 | SetPARJ(46, 0.75); // mod. of the Lund FF for heavy end-point quarks | |
1444 | SetPARP(89,1800.); // [GeV] Ref. energy | |
e0e89f40 | 1445 | } |
e8a8adcd | 1446 | |
1447 | AliPythia& AliPythia::operator=(const AliPythia& rhs) | |
1448 | { | |
1449 | // Assignment operator | |
1450 | rhs.Copy(*this); | |
1451 | return *this; | |
1452 | } | |
1453 | ||
1454 | void AliPythia::Copy(TObject&) const | |
1455 | { | |
1456 | // | |
1457 | // Copy | |
1458 | // | |
1459 | Fatal("Copy","Not implemented!\n"); | |
1460 | } | |
cd07c39b | 1461 | |
03358a32 | 1462 | void AliPythia::DalitzDecays() |
1463 | { | |
1464 | ||
1465 | // | |
1466 | // Replace all omega dalitz decays with the correct matrix element decays | |
1467 | // | |
1468 | Int_t nt = fPyjets->N; | |
1469 | for (Int_t i = 0; i < nt; i++) { | |
1470 | if (fPyjets->K[1][i] != 223) continue; | |
1471 | Int_t fd = fPyjets->K[3][i] - 1; | |
1472 | Int_t ld = fPyjets->K[4][i] - 1; | |
1473 | if (fd < 0) continue; | |
1474 | if ((ld - fd) != 2) continue; | |
1475 | if ((fPyjets->K[1][fd] != 111) || | |
ba4e47a0 | 1476 | ((TMath::Abs(fPyjets->K[1][fd+1]) != 11) && (TMath::Abs(fPyjets->K[1][fd+1]) != 13))) |
1477 | continue; | |
03358a32 | 1478 | TLorentzVector omega(fPyjets->P[0][i], fPyjets->P[1][i], fPyjets->P[2][i], fPyjets->P[3][i]); |
ba4e47a0 | 1479 | Int_t pdg = TMath::Abs(fPyjets->K[1][fd+1]); |
1480 | fOmegaDalitz.Decay(pdg, &omega); | |
03358a32 | 1481 | for (Int_t j = 0; j < 3; j++) { |
1482 | for (Int_t k = 0; k < 4; k++) { | |
1483 | TLorentzVector vec = (fOmegaDalitz.Products())[2-j]; | |
1484 | fPyjets->P[k][fd+j] = vec[k]; | |
1485 | } | |
1486 | } | |
1487 | } | |
1488 | } |