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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 | ||
17 | /* $Id$ */ | |
18 | #include <TString.h> | |
19 | #include <TVector3.h> | |
20 | #include <TMath.h> | |
21 | ||
22 | #include "AliPythia8.h" | |
23 | #include "AliLog.h" | |
24 | #include "AliStack.h" | |
25 | #include "AliPythiaRndm.h" | |
26 | ||
27 | ||
28 | ClassImp(AliPythia8) | |
29 | ||
30 | // Particles produced in string fragmentation point directly to either of the two endpoints | |
31 | // of the string (depending in the side they were generated from). | |
32 | // SetMSTU(16,2); // ???? | |
33 | // String drawing almost completely minimizes string length. | |
34 | // Probability that an additional interaction gives two gluons | |
35 | // ... with color connection to nearest neighbours | |
36 | // SetPARP(85,0.9); | |
37 | // ... as closed gluon loop | |
38 | // SetPARP(86,0.95); | |
39 | // Lambda_FSR scale. | |
40 | // SetPARJ(81, 0.29); | |
41 | // Baryon production model | |
42 | // SetMSTJ(12,3); | |
43 | // String fragmentation | |
44 | // SetMSTJ(1,1); | |
45 | // sea quarks can be used for baryon formation | |
46 | // SetMSTP(88,2); | |
47 | // choice of max. virtuality for ISR | |
48 | // SetMSTP(68,1); | |
49 | // regularisation scheme of ISR | |
50 | // SetMSTP(70,2); | |
51 | // all resonance decays switched on | |
52 | // SetMSTP(41,1); | |
53 | AliPythia8* AliPythia8::fgAliPythia8=NULL; | |
54 | ||
55 | AliPythia8::AliPythia8(): | |
56 | TPythia8(), | |
57 | AliPythiaBase(), | |
58 | fProcess(kPyMb), | |
59 | fEcms(0.), | |
60 | fStrucFunc(kCTEQ5L), | |
61 | fEtSeed(0.), | |
62 | fMinEtJet(0.), | |
63 | fRJet(0.), | |
64 | fYScale(0.), | |
65 | fPtScale(0.), | |
66 | fNJetMin(0), | |
67 | fNJetMax(0) | |
68 | { | |
69 | // Default Constructor | |
70 | // | |
71 | // Set random number | |
72 | if (!AliPythiaRndm::GetPythiaRandom()) | |
73 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
74 | } | |
75 | ||
76 | AliPythia8::AliPythia8(const AliPythia8& pythia): | |
77 | TPythia8(), | |
78 | AliPythiaBase(), | |
79 | fProcess(kPyMb), | |
80 | fEcms(0.), | |
81 | fStrucFunc(kCTEQ5L), | |
82 | fEtSeed(0.), | |
83 | fMinEtJet(0.), | |
84 | fRJet(0.), | |
85 | fYScale(0.), | |
86 | fPtScale(0.), | |
87 | fNJetMin(0), | |
88 | fNJetMax(0) | |
89 | { | |
90 | // Copy Constructor | |
91 | pythia.Copy(*this); | |
92 | } | |
93 | ||
94 | void AliPythia8::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc) | |
95 | { | |
96 | // Initialise the process to generate | |
97 | if (!AliPythiaRndm::GetPythiaRandom()) | |
98 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
99 | ||
100 | fProcess = process; | |
101 | fEcms = energy; | |
102 | fStrucFunc = strucfunc; | |
103 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. | |
104 | ReadString("111:mayDecay = off"); | |
105 | ReadString("310:mayDecay = off"); | |
106 | ReadString("3122:mayDecay = off"); | |
107 | ReadString("3112:mayDecay = off"); | |
108 | ReadString("3212:mayDecay = off"); | |
109 | ReadString("3222:mayDecay = off"); | |
110 | ReadString("3312:mayDecay = off"); | |
111 | ReadString("3322:mayDecay = off"); | |
112 | ReadString("3334:mayDecay = off"); | |
113 | // Select structure function | |
114 | ||
115 | ReadString("PDF:useLHAPDF = on"); | |
116 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(fStrucFunc).Data())); | |
117 | ||
118 | // Particles produced in string fragmentation point directly to either of the two endpoints | |
119 | // of the string (depending in the side they were generated from). | |
120 | ||
121 | // SetMSTU(16,2); // ???? | |
122 | ||
123 | // | |
124 | // Pythia initialisation for selected processes// | |
125 | // | |
126 | switch (process) | |
127 | { | |
128 | case kPyOldUEQ2ordered: //Old underlying events with Q2 ordered QCD processes | |
129 | // Multiple interactions on. | |
130 | ReadString("PartonLevel:MI = on"); | |
131 | // Double Gaussian matter distribution. | |
132 | ReadString("MultipleInteractions:bProfile = 2"); | |
133 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
134 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
135 | // pT0. | |
136 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
137 | // Reference energy for pT0 and energy rescaling pace. | |
138 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
139 | ReadString("MultipleInteractions:ecmPow = 0.25"); | |
140 | // String drawing almost completely minimizes string length. | |
141 | // SetPARP(85,0.9); | |
142 | // SetPARP(86,0.95); | |
143 | // ISR and FSR activity. | |
144 | // Q^2 scale of the hard scattering | |
145 | ReadString("SigmaProcess:factorMultFac = 4."); | |
146 | // Lambda_FSR scale. | |
147 | // SetPARJ(81, 0.29); | |
148 | break; | |
149 | case kPyOldUEQ2ordered2: | |
150 | // Old underlying events with Q2 ordered QCD processes | |
151 | // Multiple interactions on. | |
152 | ReadString("PartonLevel:MI = on"); | |
153 | // Double Gaussian matter distribution. | |
154 | ReadString("MultipleInteractions:bProfile = 2"); | |
155 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
156 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
157 | // pT0. | |
158 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
159 | // Reference energy for pT0 and energy rescaling pace. | |
160 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
161 | ReadString("MultipleInteractions:ecmPow = 0.16"); | |
162 | // String drawing almost completely minimizes string length. | |
163 | // SetPARP(85,0.9); | |
164 | // SetPARP(86,0.95); | |
165 | // ISR and FSR activity. | |
166 | ReadString("SigmaProcess:factorMultFac = 4."); | |
167 | // Lambda_FSR scale. | |
168 | // SetPARJ(81,0.29); | |
169 | break; | |
170 | case kPyOldPopcorn: | |
171 | // Old production mechanism: Old Popcorn | |
172 | ReadString("HardQCD:all = on"); | |
173 | // SetMSTJ(12,3); | |
174 | // (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon | |
175 | // SetMSTP(88,2); | |
176 | // (D=1)see can be used to form baryons (BARYON JUNCTION) | |
177 | // SetMSTJ(1,1); | |
178 | AtlasTuning(); | |
179 | break; | |
180 | case kPyCharm: | |
181 | ReadString("HardQCD:gg2ccbar = on"); | |
182 | ReadString("HardQCD:qqbar2ccbar = on"); | |
183 | // heavy quark masses | |
184 | ReadString("ParticleData:mcRun = 1.2"); | |
185 | // | |
186 | // primordial pT | |
187 | ReadString("Beams:primordialKT = on"); | |
188 | ReadString("Beams:primordialKTsoft = 0."); | |
189 | ReadString("Beams:primordialKThard = 1."); | |
190 | ReadString("Beams:halfScaleForKT = 0."); | |
191 | ReadString("Beams:halfMassForKT = 0."); | |
192 | break; | |
193 | case kPyBeauty: | |
194 | ReadString("HardQCD:gg2bbbar = on"); | |
195 | ReadString("HardQCD:qqbar2bbbar = on"); | |
196 | ReadString("ParticleData:mbRun = 4.75"); | |
197 | break; | |
198 | case kPyJpsi: | |
199 | // gg->J/Psi g | |
200 | ReadString("Charmonium:gg2QQbar[3S1(1)]g = on"); | |
201 | break; | |
202 | case kPyJpsiChi: | |
203 | ReadString("Charmonium:all = on"); | |
204 | break; | |
205 | case kPyCharmUnforced: | |
206 | // gq->qg | |
207 | ReadString("HardQCD:gq2qg = on"); | |
208 | // gg->qq | |
209 | ReadString("HardQCD:gg2qq = on"); | |
210 | // gg->gg | |
211 | ReadString("HardQCD:gg2gg = on"); | |
212 | break; | |
213 | case kPyBeautyUnforced: | |
214 | // gq->qg | |
215 | ReadString("HardQCD:gq2qg = on"); | |
216 | // gg->qq | |
217 | ReadString("HardQCD:gg2qq = on"); | |
218 | // gg->gg | |
219 | ReadString("HardQCD:gg2gg = on"); | |
220 | break; | |
221 | case kPyMb: | |
222 | // Minimum Bias pp-Collisions | |
223 | // | |
224 | // | |
225 | // select Pythia min. bias model | |
226 | // single diffraction AB-->XB | |
227 | ReadString("SoftQCD:minBias = on"); | |
228 | ReadString("SoftQCD:singleDiffractive = on"); | |
229 | ReadString("SoftQCD:doubleDiffractive = on"); | |
230 | AtlasTuning(); | |
231 | break; | |
232 | case kPyMbDefault: | |
233 | // Minimum Bias pp-Collisions | |
234 | // | |
235 | // | |
236 | // select Pythia min. bias model | |
237 | ReadString("SoftQCD:minBias = on"); | |
238 | ReadString("SoftQCD:singleDiffractive = on"); | |
239 | ReadString("SoftQCD:doubleDiffractive = on"); | |
240 | break; | |
241 | case kPyLhwgMb: | |
242 | // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120 | |
243 | // -> Pythia 6.3 or above is needed | |
244 | // | |
245 | ReadString("SoftQCD:minBias = on"); | |
246 | ReadString("SoftQCD:singleDiffractive = on"); | |
247 | ReadString("SoftQCD:doubleDiffractive = on"); | |
248 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ6ll).Data())); | |
249 | ||
250 | // SetMSTP(68,1); | |
251 | // SetMSTP(70,2); | |
252 | // ReadString("PartonLevel:MI = on"); | |
253 | // Double Gaussian matter distribution. | |
254 | ReadString("MultipleInteractions:bProfile = 2"); | |
255 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
256 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
257 | ReadString("MultipleInteractions:expPow = 0.16"); | |
258 | ReadString("MultipleInteractions:pTmin = 2.3"); | |
259 | // SetMSTP(88,1); | |
260 | // SetPARP(85,0.9); // Regulates gluon prod. mechanism | |
261 | break; | |
262 | case kPyMbNonDiffr: | |
263 | // Minimum Bias pp-Collisions | |
264 | // | |
265 | // | |
266 | // select Pythia min. bias model | |
267 | ReadString("SoftQCD:minBias = on"); | |
268 | AtlasTuning(); | |
269 | break; | |
270 | case kPyMbMSEL1: | |
271 | ConfigHeavyFlavor(); | |
272 | // Intrinsic <kT^2> | |
273 | ReadString("Beams:primordialKT = on"); | |
274 | ReadString("Beams:primordialKTsoft = 0."); | |
275 | ReadString("Beams:primordialKThard = 1."); | |
276 | ReadString("Beams:halfScaleForKT = 0."); | |
277 | ReadString("Beams:halfMassForKT = 0."); | |
278 | // Set Q-quark mass | |
279 | ReadString("ParticleData:mcRun = 1.20"); | |
280 | ReadString("ParticleData:mbRun = 4.78"); | |
281 | // Atlas Tuning | |
282 | AtlasTuning(); | |
283 | break; | |
284 | case kPyJets: | |
285 | // | |
286 | // QCD Jets | |
287 | // | |
288 | ReadString("HardQCD:all = on"); | |
289 | // | |
290 | // Pythia Tune A (CDF) | |
291 | // | |
292 | ReadString("PartonLevel:MI = on"); | |
293 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
294 | ReadString("MultipleInteractions:pT0Ref = 2.8"); | |
295 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
296 | ReadString("MultipleInteractions:expPow = 0.25"); | |
297 | ReadString("MultipleInteractions:bProfile = 2"); | |
298 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
299 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
300 | ReadString("SigmaProcess:factorMultFac = 2.5"); | |
301 | // SetPARP(85,0.90) ; // Regulates gluon prod. mechanism | |
302 | // SetPARP(86,0.95); // Regulates gluon prod. mechanism | |
303 | break; | |
304 | case kPyDirectGamma: | |
305 | ReadString("PromptPhoton:all = on"); | |
306 | break; | |
307 | case kPyCharmPbPbMNR: | |
308 | case kPyD0PbPbMNR: | |
309 | case kPyDPlusPbPbMNR: | |
310 | case kPyDPlusStrangePbPbMNR: | |
311 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
312 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
313 | // c-cbar single inclusive and double differential distributions. | |
314 | // This parameter settings are meant to work with Pb-Pb collisions | |
315 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
316 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
317 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
318 | ConfigHeavyFlavor(); | |
319 | // Intrinsic <kT> | |
320 | ReadString("Beams:primordialKT = on"); | |
321 | ReadString("Beams:primordialKTsoft = 0."); | |
322 | ReadString("Beams:primordialKThard = 1.304"); | |
323 | ReadString("Beams:halfScaleForKT = 0."); | |
324 | ReadString("Beams:halfMassForKT = 0."); | |
325 | // Set c-quark mass | |
326 | ReadString("ParticleData:mcRun = 1.20"); | |
327 | break; | |
328 | case kPyCharmpPbMNR: | |
329 | case kPyD0pPbMNR: | |
330 | case kPyDPluspPbMNR: | |
331 | case kPyDPlusStrangepPbMNR: | |
332 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
333 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
334 | // c-cbar single inclusive and double differential distributions. | |
335 | // This parameter settings are meant to work with p-Pb collisions | |
336 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
337 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
338 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
339 | ConfigHeavyFlavor(); | |
340 | // Intrinsic <kT> | |
341 | ReadString("Beams:primordialKT = on"); | |
342 | ReadString("Beams:primordialKTsoft = 0."); | |
343 | ReadString("Beams:primordialKThard = 1.16"); | |
344 | ReadString("Beams:halfScaleForKT = 0."); | |
345 | ReadString("Beams:halfMassForKT = 0."); | |
346 | // Set c-quark mass | |
347 | ReadString("ParticleData:mcRun = 1.20"); | |
348 | break; | |
349 | case kPyCharmppMNR: | |
350 | case kPyD0ppMNR: | |
351 | case kPyDPlusppMNR: | |
352 | case kPyDPlusStrangeppMNR: | |
353 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
354 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
355 | // c-cbar single inclusive and double differential distributions. | |
356 | // This parameter settings are meant to work with pp collisions | |
357 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
358 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
359 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
360 | ConfigHeavyFlavor(); | |
361 | // Intrinsic <kT^2> | |
362 | ReadString("Beams:primordialKT = on"); | |
363 | ReadString("Beams:primordialKTsoft = 0."); | |
364 | ReadString("Beams:primordialKThard = 1."); | |
365 | ReadString("Beams:halfScaleForKT = 0."); | |
366 | ReadString("Beams:halfMassForKT = 0."); | |
367 | // Set c-quark mass | |
368 | ReadString("ParticleData:mcRun = 1.20"); | |
369 | break; | |
370 | case kPyCharmppMNRwmi: | |
371 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
372 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
373 | // c-cbar single inclusive and double differential distributions. | |
374 | // This parameter settings are meant to work with pp collisions | |
375 | // and with kCTEQ5L PDFs. | |
376 | // Added multiple interactions according to ATLAS tune settings. | |
377 | // To get a "reasonable" agreement with MNR results, events have to be | |
378 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
379 | // set to 2.76 GeV. | |
380 | // To get a "perfect" agreement with MNR results, events have to be | |
381 | // generated in four ptHard bins with the following relative | |
382 | // normalizations: | |
383 | // 2.76-3 GeV: 25% | |
384 | // 3-4 GeV: 40% | |
385 | // 4-8 GeV: 29% | |
386 | // >8 GeV: 6% | |
387 | ConfigHeavyFlavor(); | |
388 | // Intrinsic <kT^2> | |
389 | ReadString("Beams:primordialKT = on"); | |
390 | ReadString("Beams:primordialKTsoft = 0."); | |
391 | ReadString("Beams:primordialKThard = 1."); | |
392 | ReadString("Beams:halfScaleForKT = 0."); | |
393 | ReadString("Beams:halfMassForKT = 0."); | |
394 | // Set c-quark mass | |
395 | ReadString("ParticleData:mcRun = 1.20"); | |
396 | AtlasTuning(); | |
397 | break; | |
398 | case kPyBeautyPbPbMNR: | |
399 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
400 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
401 | // b-bbar single inclusive and double differential distributions. | |
402 | // This parameter settings are meant to work with Pb-Pb collisions | |
403 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
404 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
405 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
406 | ConfigHeavyFlavor(); | |
407 | // QCD scales | |
408 | ReadString("SigmaProcess:factorMultFac = 1."); | |
409 | // Intrinsic <kT> | |
410 | ReadString("Beams:primordialKT = on"); | |
411 | ReadString("Beams:primordialKTsoft = 0."); | |
412 | ReadString("Beams:primordialKThard = 2.035"); | |
413 | ReadString("Beams:halfScaleForKT = 0."); | |
414 | ReadString("Beams:halfMassForKT = 0."); | |
415 | // Set b-quark mass | |
416 | ReadString("ParticleData:mbRun = 4.75"); | |
417 | break; | |
418 | case kPyBeautypPbMNR: | |
419 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
420 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
421 | // b-bbar single inclusive and double differential distributions. | |
422 | // This parameter settings are meant to work with p-Pb collisions | |
423 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
424 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
425 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
426 | ConfigHeavyFlavor(); | |
427 | // QCD scales | |
428 | ReadString("SigmaProcess:factorMultFac = 1."); | |
429 | // Intrinsic <kT> | |
430 | ReadString("Beams:primordialKT = on"); | |
431 | ReadString("Beams:primordialKTsoft = 0."); | |
432 | ReadString("Beams:primordialKThard = 1.6"); | |
433 | ReadString("Beams:halfScaleForKT = 0."); | |
434 | ReadString("Beams:halfMassForKT = 0."); | |
435 | // Set b-quark mass | |
436 | ReadString("ParticleData:mbRun = 4.75"); | |
437 | break; | |
438 | case kPyBeautyppMNR: | |
439 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
440 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
441 | // b-bbar single inclusive and double differential distributions. | |
442 | // This parameter settings are meant to work with pp collisions | |
443 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
444 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
445 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
446 | ConfigHeavyFlavor(); | |
447 | // QCD scales | |
448 | ReadString("SigmaProcess:factorMultFac = 1."); | |
449 | // Intrinsic <kT> | |
450 | ReadString("Beams:primordialKT = on"); | |
451 | ReadString("Beams:primordialKTsoft = 0."); | |
452 | ReadString("Beams:primordialKThard = 1.0"); | |
453 | ReadString("Beams:halfScaleForKT = 0."); | |
454 | ReadString("Beams:halfMassForKT = 0."); | |
455 | // Set b-quark mass | |
456 | ReadString("ParticleData:mbRun = 4.75"); | |
457 | break; | |
458 | case kPyBeautyppMNRwmi: | |
459 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
460 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
461 | // b-bbar single inclusive and double differential distributions. | |
462 | // This parameter settings are meant to work with pp collisions | |
463 | // and with kCTEQ5L PDFs. | |
464 | // Added multiple interactions according to ATLAS tune settings. | |
465 | // To get a "reasonable" agreement with MNR results, events have to be | |
466 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
467 | // set to 2.76 GeV. | |
468 | // To get a "perfect" agreement with MNR results, events have to be | |
469 | // generated in four ptHard bins with the following relative | |
470 | // normalizations: | |
471 | // 2.76-4 GeV: 5% | |
472 | // 4-6 GeV: 31% | |
473 | // 6-8 GeV: 28% | |
474 | // >8 GeV: 36% | |
475 | ConfigHeavyFlavor(); | |
476 | // QCD scales | |
477 | ReadString("SigmaProcess:factorMultFac = 1."); | |
478 | // Intrinsic <kT> | |
479 | ReadString("Beams:primordialKT = on"); | |
480 | ReadString("Beams:primordialKTsoft = 0."); | |
481 | ReadString("Beams:primordialKThard = 1.0"); | |
482 | ReadString("Beams:halfScaleForKT = 0."); | |
483 | ReadString("Beams:halfMassForKT = 0."); | |
484 | // Set b-quark mass | |
485 | ReadString("ParticleData:mbRun = 4.75"); | |
486 | AtlasTuning(); | |
487 | break; | |
488 | case kPyW: | |
489 | //Inclusive production of W+/- | |
490 | //f fbar -> W+ | |
491 | ReadString("WeakSingleBoson:ffbar2W = on"); | |
492 | // Initial/final parton shower on (Pythia default) | |
493 | // With parton showers on we are generating "W inclusive process" | |
494 | ReadString("PartonLevel:ISR = on"); | |
495 | ReadString("PartonLevel:FSR = on"); | |
496 | break; | |
497 | case kPyZ: | |
498 | //Inclusive production of Z | |
499 | //f fbar -> Z/gamma | |
500 | ReadString("WeakSingleBoson:ffbar2gmZ = on"); | |
501 | //only Z included, not gamma | |
502 | ReadString("WeakZ0:gmZmode = 2"); | |
503 | // Initial/final parton shower on (Pythia default) | |
504 | // With parton showers on we are generating "Z inclusive process" | |
505 | ReadString("PartonLevel:ISR = on"); | |
506 | ReadString("PartonLevel:FSR = on"); | |
507 | break; | |
508 | } | |
509 | // | |
510 | // Initialize PYTHIA | |
511 | // SetMSTP(41,1); // all resonance decays switched on | |
512 | Initialize(2212, 2212, fEcms); | |
513 | } | |
514 | ||
515 | void AliPythia8::SetNuclei(Int_t /*a1*/, Int_t /*a2*/) | |
516 | { | |
517 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
518 | // The MSTP array in the PYPARS common block is used to enable and | |
519 | // select the nuclear structure functions. | |
520 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
521 | // =1: internal PYTHIA acording to MSTP(51) | |
522 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
523 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
524 | // MSTP(192) : Mass number of nucleus side 1 | |
525 | // MSTP(193) : Mass number of nucleus side 2 | |
526 | // SetMSTP(52,2); | |
527 | // SetMSTP(192, a1); | |
528 | // SetMSTP(193, a2); | |
529 | } | |
530 | ||
531 | ||
532 | AliPythia8* AliPythia8::Instance() | |
533 | { | |
534 | // Set random number generator | |
535 | if (fgAliPythia8) { | |
536 | return fgAliPythia8; | |
537 | } else { | |
538 | fgAliPythia8 = new AliPythia8(); | |
539 | return fgAliPythia8; | |
540 | } | |
541 | } | |
542 | ||
543 | void AliPythia8::PrintParticles() | |
544 | { | |
545 | // Print list of particl properties | |
546 | ReadString("Main:showAllParticleData"); | |
547 | } | |
548 | ||
549 | void AliPythia8::ResetDecayTable() | |
550 | { | |
551 | // Set default values for pythia decay switches | |
552 | // Int_t i; | |
553 | // for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
554 | // for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
555 | } | |
556 | ||
557 | void AliPythia8::SetDecayTable() | |
558 | { | |
559 | // Set default values for pythia decay switches | |
560 | // | |
561 | // Int_t i; | |
562 | // for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
563 | // for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
564 | } | |
565 | ||
566 | void AliPythia8::Pyclus(Int_t& njet) | |
567 | { | |
568 | // Call Pythia clustering algorithm | |
569 | // | |
570 | Bool_t ok = fClusterJet.analyze(Pythia8()->event, fYScale, fPtScale, fNJetMin, fNJetMax); | |
571 | njet = 0; | |
572 | if (ok) njet = fClusterJet.size(); | |
573 | } | |
574 | ||
575 | void AliPythia8::Pycell(Int_t& njet) | |
576 | { | |
577 | // Call Pythia jet reconstruction algorithm | |
578 | // | |
579 | Bool_t ok = fCellJet.analyze(Pythia8()->event, fMinEtJet, fRJet, fEtSeed); | |
580 | njet = 0; | |
581 | if (ok) njet = fCellJet.size(); | |
582 | } | |
583 | ||
584 | void AliPythia8::GetJet(Int_t i, Float_t& px, Float_t& py, Float_t& pz, Float_t& e) | |
585 | { | |
586 | // Get jet number i | |
587 | Float_t et = fCellJet.eT(i); | |
588 | px = et * TMath::Cos(fCellJet.phiWeighted(i)); | |
589 | py = et * TMath::Sin(fCellJet.phiWeighted(i)); | |
590 | pz = et * TMath::SinH(fCellJet.etaWeighted(i)); | |
591 | e = et * TMath::CosH(fCellJet.etaWeighted(i)); | |
592 | } | |
593 | ||
594 | void AliPythia8::GenerateEvent() | |
595 | { | |
596 | // Generate one event | |
597 | TPythia8::GenerateEvent(); | |
598 | } | |
599 | ||
600 | void AliPythia8::GenerateMIEvent() | |
601 | { | |
602 | // New multiple interaction scenario | |
603 | AliWarning("Not implemented. No event will be generated"); | |
604 | } | |
605 | ||
606 | void AliPythia8::PrintStatistics() | |
607 | { | |
608 | // End of run statistics | |
609 | TPythia8::PrintStatistics(); | |
610 | } | |
611 | ||
612 | void AliPythia8::EventListing() | |
613 | { | |
614 | // End of run statistics | |
615 | TPythia8::EventListing(); | |
616 | } | |
617 | ||
618 | Int_t AliPythia8::ProcessCode() | |
619 | { | |
620 | // Returns the subprocess code for the current event | |
6db2ea6e | 621 | return Pythia8()->info.code(); |
cc545eb9 | 622 | } |
623 | ||
624 | void AliPythia8::ConfigHeavyFlavor() | |
625 | { | |
626 | // | |
627 | // Default configuration for Heavy Flavor production | |
628 | // | |
629 | // All QCD processes | |
630 | // | |
631 | ReadString("HardQCD:all = on"); | |
632 | ||
633 | // No multiple interactions | |
634 | ReadString("PartonLevel:MI = off"); | |
635 | ReadString("MultipleInteractions:pTmin = 0.0"); | |
636 | ReadString("MultipleInteractions:pT0Ref = 0.0"); | |
637 | ||
638 | // Initial/final parton shower on (Pythia default) | |
639 | ReadString("PartonLevel:ISR = on"); | |
640 | ReadString("PartonLevel:FSR = on"); | |
641 | ||
642 | // 2nd order alpha_s | |
643 | ReadString("SigmaProcess:alphaSorder = 2"); | |
644 | ||
645 | // QCD scales | |
646 | ReadString("SigmaProcess:renormScale2 = 2"); | |
647 | ReadString("SigmaProcess:renormMultFac = 1."); | |
648 | } | |
649 | ||
650 | void AliPythia8::AtlasTuning() | |
651 | { | |
652 | // | |
653 | // Configuration for the ATLAS tuning | |
654 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ5L).Data())); | |
655 | ReadString("PartonLevel:MI = on"); | |
656 | ReadString("MultipleInteractions:pTmin = 1.9"); | |
657 | ReadString("MultipleInteractions:pT0Ref = 1.8"); | |
658 | ReadString("MultipleInteractions:ecmRef = 1000."); | |
659 | ReadString("MultipleInteractions:expPow = 0.16"); | |
660 | ReadString("MultipleInteractions:bProfile = 2"); | |
661 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
662 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
663 | // SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
664 | // SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
665 | ReadString("SigmaProcess:factorMultFac = 1."); | |
666 | } | |
667 | ||
668 | void AliPythia8::SetPtHardRange(Float_t ptmin, Float_t ptmax) | |
669 | { | |
670 | // Set the pt hard range | |
671 | ReadString(Form("PhaseSpace:pTHatMin = %13.3f", ptmin)); | |
672 | ReadString(Form("PhaseSpace:pTHatMax = %13.3f", ptmax)); | |
673 | } | |
674 | ||
675 | void AliPythia8::SetYHardRange(Float_t /*ymin*/, Float_t /*ymax*/) | |
676 | { | |
677 | // Set the y hard range | |
678 | printf("YHardRange not implemented in Pythia8 !!!\n"); | |
679 | ||
680 | } | |
681 | ||
682 | ||
683 | void AliPythia8::SetFragmentation(Int_t flag) | |
684 | { | |
685 | // Switch fragmentation on/off | |
686 | if (flag) { | |
687 | ReadString("HadronLevel:Hadronize = on"); | |
688 | } else { | |
689 | ReadString("HadronLevel:Hadronize = off"); | |
690 | } | |
691 | } | |
692 | ||
693 | void AliPythia8::SetInitialAndFinalStateRadiation(Int_t flag1, Int_t flag2) | |
694 | { | |
695 | // initial state radiation | |
696 | if (flag1) { | |
697 | ReadString("PartonLevel:ISR = on"); | |
698 | } else { | |
699 | ReadString("PartonLevel:ISR = off"); | |
700 | } | |
701 | // final state radiation | |
702 | if (flag2) { | |
703 | ReadString("PartonLevel:FSR = on"); | |
704 | } else { | |
705 | ReadString("PartonLevel:FSR = off"); | |
706 | } | |
707 | } | |
708 | ||
709 | void AliPythia8::SetIntrinsicKt(Float_t kt) | |
710 | { | |
711 | ReadString("Beams:primordialKT = on"); | |
712 | ReadString("Beams:primordialKTsoft = 0."); | |
713 | ReadString(Form("Beams:primordialKThard = %13.3f", kt)); | |
714 | ReadString("Beams:halfScaleForKT = 0."); | |
715 | ReadString("Beams:halfMassForKT = 0."); | |
716 | } | |
717 | ||
718 | void AliPythia8::SwitchHFOff() | |
719 | { | |
720 | // Switch off heavy flavor | |
721 | // Maximum number of quark flavours used in pdf | |
722 | ReadString("PDFinProcess:nQuarkIn = 3"); | |
723 | // Maximum number of flavors that can be used in showers | |
724 | ReadString("TimeShower:nGluonToQuark = 3"); | |
725 | ReadString("SpaceShower:nQuarkIn = 3"); | |
726 | ||
727 | ||
728 | } | |
729 | ||
730 | void AliPythia8::SetPycellParameters(Float_t etaMax, Int_t nEta, Int_t nPhi, | |
731 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) | |
732 | { | |
733 | // Set pycell parameters | |
734 | fCellJet = Pythia8::CellJet( etaMax, nEta, nPhi, 2, 0, 0., 0., thresh); | |
735 | fEtSeed = etseed; | |
736 | fMinEtJet = minet; | |
737 | fRJet = r; | |
738 | } | |
739 | ||
740 | void AliPythia8::ModifiedSplitting() | |
741 | { | |
742 | // | |
743 | // We have to see how to implement this in Pythia8 !!! | |
744 | // | |
745 | // Modified splitting probability as a model for quenching | |
746 | // SetPARJ(200, 0.8); | |
747 | // SetMSTJ(41, 1); // QCD radiation only | |
748 | // SetMSTJ(42, 2); // angular ordering | |
749 | // SetMSTJ(44, 2); // option to run alpha_s | |
750 | // SetMSTJ(47, 0); // No correction back to hard scattering element | |
751 | // SetMSTJ(50, 0); // No coherence in first branching | |
752 | // SetPARJ(82, 1.); // Cut off for parton showers | |
753 | } | |
754 | ||
755 | ||
756 | void AliPythia8::InitQuenching(Float_t /*cMin*/, Float_t /*cMax*/, Float_t /*k*/, Int_t /*iECMethod*/, Float_t /*zmax*/, Int_t /*ngmax*/) | |
757 | { | |
758 | // | |
759 | // | |
760 | AliWarning("Not implemented !"); | |
761 | } | |
762 | ||
763 | void AliPythia8::SwitchHadronisationOff() | |
764 | { | |
765 | // Switch off hadronisation | |
766 | ReadString("HadronLevel:Hadronize = off"); | |
767 | } | |
768 | ||
769 | void AliPythia8::SwitchHadronisationOn() | |
770 | { | |
771 | // Switch on hadronisarion | |
772 | ReadString("HadronLevel:Hadronize = on"); | |
773 | } | |
774 | ||
775 | ||
776 | void AliPythia8::GetXandQ(Float_t& x1, Float_t& x2, Float_t& q) | |
777 | { | |
778 | // Get x1, x2 and Q for this event | |
779 | ||
780 | q = Pythia8()->info.QFac(); | |
781 | x1 = Pythia8()->info.x1(); | |
782 | x2 = Pythia8()->info.x2(); | |
783 | ||
784 | } | |
785 | ||
786 | Float_t AliPythia8::GetXSection() | |
787 | { | |
788 | // Get the total cross-section | |
789 | return Pythia8()->info.sigmaGen(); | |
790 | } | |
791 | ||
792 | Float_t AliPythia8::GetPtHard() | |
793 | { | |
794 | // Get the pT hard for this event | |
795 | return Pythia8()->info.pTHat(); | |
796 | } | |
797 | ||
798 | ||
799 | ||
800 | ||
801 | AliPythia8& AliPythia8::operator=(const AliPythia8& rhs) | |
802 | { | |
803 | // Assignment operator | |
804 | rhs.Copy(*this); | |
805 | return *this; | |
806 | } | |
807 | ||
808 | void AliPythia8::Copy(TObject&) const | |
809 | { | |
810 | // | |
811 | // Copy | |
812 | // | |
813 | Fatal("Copy","Not implemented!\n"); | |
814 | } | |
815 | ||
816 | // | |
817 | // To be implemented | |
818 | // | |
819 | void AliPythia8::SetNumberOfParticles(Int_t /*i*/) | |
820 | { | |
821 | AliWarning("Not implemented"); | |
822 | } | |
823 | ||
824 | void AliPythia8::EditEventList(Int_t /*i*/) | |
825 | { | |
826 | AliWarning("Not implemented"); | |
827 | } | |
828 | ||
829 | void AliPythia8::Pyquen(Double_t /*a*/, Int_t /*b*/, Double_t /*c*/) | |
830 | { | |
831 | AliWarning("Cannot be used with Pythia8"); | |
832 | } | |
833 | ||
834 | void AliPythia8::HadronizeEvent() | |
835 | { | |
836 | // Needs access to HadronLevel ? | |
837 | AliWarning("Not yet implemented"); | |
838 | } | |
839 | ||
840 | void AliPythia8::GetQuenchingParameters(Double_t& /*xp*/, Double_t& /*yp*/, Double_t* /*z[4]*/) | |
841 | { | |
842 | AliWarning("Not yet implemented"); | |
843 | } | |
844 | ||
845 | void AliPythia8::LoadEvent(AliStack* /*stack*/, Int_t /*flag*/, Int_t /*reHadr*/) | |
846 | { | |
847 | AliWarning("Not yet implemented"); | |
848 | } |