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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(): | |
b584e2f5 | 56 | AliTPythia8(), |
cc545eb9 | 57 | AliPythiaBase(), |
58 | fProcess(kPyMb), | |
59 | fEcms(0.), | |
60 | fStrucFunc(kCTEQ5L), | |
b062cb58 | 61 | fCellJet(), |
cc545eb9 | 62 | fEtSeed(0.), |
63 | fMinEtJet(0.), | |
64 | fRJet(0.), | |
b062cb58 | 65 | fClusterJet(), |
cc545eb9 | 66 | fYScale(0.), |
67 | fPtScale(0.), | |
68 | fNJetMin(0), | |
69 | fNJetMax(0) | |
70 | { | |
71 | // Default Constructor | |
72 | // | |
73 | // Set random number | |
74 | if (!AliPythiaRndm::GetPythiaRandom()) | |
75 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
76 | } | |
77 | ||
78 | AliPythia8::AliPythia8(const AliPythia8& pythia): | |
b584e2f5 | 79 | AliTPythia8(), |
cc545eb9 | 80 | AliPythiaBase(), |
81 | fProcess(kPyMb), | |
82 | fEcms(0.), | |
83 | fStrucFunc(kCTEQ5L), | |
b062cb58 | 84 | fCellJet(), |
cc545eb9 | 85 | fEtSeed(0.), |
86 | fMinEtJet(0.), | |
87 | fRJet(0.), | |
b062cb58 | 88 | fClusterJet(), |
cc545eb9 | 89 | fYScale(0.), |
90 | fPtScale(0.), | |
91 | fNJetMin(0), | |
92 | fNJetMax(0) | |
93 | { | |
94 | // Copy Constructor | |
95 | pythia.Copy(*this); | |
96 | } | |
97 | ||
98 | void AliPythia8::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc) | |
99 | { | |
100 | // Initialise the process to generate | |
101 | if (!AliPythiaRndm::GetPythiaRandom()) | |
102 | AliPythiaRndm::SetPythiaRandom(GetRandom()); | |
103 | ||
104 | fProcess = process; | |
105 | fEcms = energy; | |
106 | fStrucFunc = strucfunc; | |
107 | //...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-. | |
108 | ReadString("111:mayDecay = off"); | |
109 | ReadString("310:mayDecay = off"); | |
110 | ReadString("3122:mayDecay = off"); | |
111 | ReadString("3112:mayDecay = off"); | |
112 | ReadString("3212:mayDecay = off"); | |
113 | ReadString("3222:mayDecay = off"); | |
114 | ReadString("3312:mayDecay = off"); | |
115 | ReadString("3322:mayDecay = off"); | |
116 | ReadString("3334:mayDecay = off"); | |
117 | // Select structure function | |
118 | ||
119 | ReadString("PDF:useLHAPDF = on"); | |
120 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(fStrucFunc).Data())); | |
121 | ||
122 | // Particles produced in string fragmentation point directly to either of the two endpoints | |
123 | // of the string (depending in the side they were generated from). | |
124 | ||
125 | // SetMSTU(16,2); // ???? | |
126 | ||
127 | // | |
128 | // Pythia initialisation for selected processes// | |
129 | // | |
130 | switch (process) | |
131 | { | |
132 | case kPyOldUEQ2ordered: //Old underlying events with Q2 ordered QCD processes | |
133 | // Multiple interactions on. | |
134 | ReadString("PartonLevel:MI = on"); | |
135 | // Double Gaussian matter distribution. | |
136 | ReadString("MultipleInteractions:bProfile = 2"); | |
137 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
138 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
139 | // pT0. | |
140 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
141 | // Reference energy for pT0 and energy rescaling pace. | |
142 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
143 | ReadString("MultipleInteractions:ecmPow = 0.25"); | |
144 | // String drawing almost completely minimizes string length. | |
145 | // SetPARP(85,0.9); | |
146 | // SetPARP(86,0.95); | |
147 | // ISR and FSR activity. | |
148 | // Q^2 scale of the hard scattering | |
149 | ReadString("SigmaProcess:factorMultFac = 4."); | |
150 | // Lambda_FSR scale. | |
151 | // SetPARJ(81, 0.29); | |
152 | break; | |
153 | case kPyOldUEQ2ordered2: | |
154 | // Old underlying events with Q2 ordered QCD processes | |
155 | // Multiple interactions on. | |
156 | ReadString("PartonLevel:MI = on"); | |
157 | // Double Gaussian matter distribution. | |
158 | ReadString("MultipleInteractions:bProfile = 2"); | |
159 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
160 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
161 | // pT0. | |
162 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
163 | // Reference energy for pT0 and energy rescaling pace. | |
164 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
165 | ReadString("MultipleInteractions:ecmPow = 0.16"); | |
166 | // String drawing almost completely minimizes string length. | |
167 | // SetPARP(85,0.9); | |
168 | // SetPARP(86,0.95); | |
169 | // ISR and FSR activity. | |
170 | ReadString("SigmaProcess:factorMultFac = 4."); | |
171 | // Lambda_FSR scale. | |
172 | // SetPARJ(81,0.29); | |
173 | break; | |
174 | case kPyOldPopcorn: | |
175 | // Old production mechanism: Old Popcorn | |
176 | ReadString("HardQCD:all = on"); | |
177 | // SetMSTJ(12,3); | |
178 | // (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon | |
179 | // SetMSTP(88,2); | |
180 | // (D=1)see can be used to form baryons (BARYON JUNCTION) | |
181 | // SetMSTJ(1,1); | |
182 | AtlasTuning(); | |
183 | break; | |
184 | case kPyCharm: | |
185 | ReadString("HardQCD:gg2ccbar = on"); | |
186 | ReadString("HardQCD:qqbar2ccbar = on"); | |
187 | // heavy quark masses | |
188 | ReadString("ParticleData:mcRun = 1.2"); | |
189 | // | |
190 | // primordial pT | |
7d09f746 | 191 | ReadString("BeamRemnants:primordialKT = on"); |
192 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
193 | ReadString("BeamRemnants:primordialKThard = 1."); | |
194 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
195 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 196 | break; |
197 | case kPyBeauty: | |
198 | ReadString("HardQCD:gg2bbbar = on"); | |
199 | ReadString("HardQCD:qqbar2bbbar = on"); | |
200 | ReadString("ParticleData:mbRun = 4.75"); | |
201 | break; | |
202 | case kPyJpsi: | |
203 | // gg->J/Psi g | |
204 | ReadString("Charmonium:gg2QQbar[3S1(1)]g = on"); | |
205 | break; | |
206 | case kPyJpsiChi: | |
207 | ReadString("Charmonium:all = on"); | |
208 | break; | |
209 | case kPyCharmUnforced: | |
210 | // gq->qg | |
211 | ReadString("HardQCD:gq2qg = on"); | |
212 | // gg->qq | |
213 | ReadString("HardQCD:gg2qq = on"); | |
214 | // gg->gg | |
215 | ReadString("HardQCD:gg2gg = on"); | |
216 | break; | |
217 | case kPyBeautyUnforced: | |
218 | // gq->qg | |
219 | ReadString("HardQCD:gq2qg = on"); | |
220 | // gg->qq | |
221 | ReadString("HardQCD:gg2qq = on"); | |
222 | // gg->gg | |
223 | ReadString("HardQCD:gg2gg = on"); | |
224 | break; | |
225 | case kPyMb: | |
226 | // Minimum Bias pp-Collisions | |
227 | // | |
228 | // | |
229 | // select Pythia min. bias model | |
230 | // single diffraction AB-->XB | |
231 | ReadString("SoftQCD:minBias = on"); | |
232 | ReadString("SoftQCD:singleDiffractive = on"); | |
233 | ReadString("SoftQCD:doubleDiffractive = on"); | |
234 | AtlasTuning(); | |
235 | break; | |
236 | case kPyMbDefault: | |
237 | // Minimum Bias pp-Collisions | |
238 | // | |
239 | // | |
240 | // select Pythia min. bias model | |
241 | ReadString("SoftQCD:minBias = on"); | |
242 | ReadString("SoftQCD:singleDiffractive = on"); | |
243 | ReadString("SoftQCD:doubleDiffractive = on"); | |
244 | break; | |
245 | case kPyLhwgMb: | |
246 | // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120 | |
247 | // -> Pythia 6.3 or above is needed | |
248 | // | |
249 | ReadString("SoftQCD:minBias = on"); | |
250 | ReadString("SoftQCD:singleDiffractive = on"); | |
251 | ReadString("SoftQCD:doubleDiffractive = on"); | |
252 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ6ll).Data())); | |
253 | ||
254 | // SetMSTP(68,1); | |
255 | // SetMSTP(70,2); | |
256 | // ReadString("PartonLevel:MI = on"); | |
257 | // Double Gaussian matter distribution. | |
258 | ReadString("MultipleInteractions:bProfile = 2"); | |
259 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
260 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
261 | ReadString("MultipleInteractions:expPow = 0.16"); | |
262 | ReadString("MultipleInteractions:pTmin = 2.3"); | |
263 | // SetMSTP(88,1); | |
264 | // SetPARP(85,0.9); // Regulates gluon prod. mechanism | |
265 | break; | |
266 | case kPyMbNonDiffr: | |
267 | // Minimum Bias pp-Collisions | |
268 | // | |
269 | // | |
270 | // select Pythia min. bias model | |
271 | ReadString("SoftQCD:minBias = on"); | |
272 | AtlasTuning(); | |
273 | break; | |
274 | case kPyMbMSEL1: | |
275 | ConfigHeavyFlavor(); | |
276 | // Intrinsic <kT^2> | |
7d09f746 | 277 | ReadString("BeamRemnants:primordialKT = on"); |
278 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
279 | ReadString("BeamRemnants:primordialKThard = 1."); | |
280 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
281 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 282 | // Set Q-quark mass |
283 | ReadString("ParticleData:mcRun = 1.20"); | |
284 | ReadString("ParticleData:mbRun = 4.78"); | |
285 | // Atlas Tuning | |
286 | AtlasTuning(); | |
287 | break; | |
288 | case kPyJets: | |
289 | // | |
290 | // QCD Jets | |
291 | // | |
292 | ReadString("HardQCD:all = on"); | |
293 | // | |
294 | // Pythia Tune A (CDF) | |
295 | // | |
296 | ReadString("PartonLevel:MI = on"); | |
297 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
298 | ReadString("MultipleInteractions:pT0Ref = 2.8"); | |
299 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
300 | ReadString("MultipleInteractions:expPow = 0.25"); | |
301 | ReadString("MultipleInteractions:bProfile = 2"); | |
302 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
303 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
304 | ReadString("SigmaProcess:factorMultFac = 2.5"); | |
305 | // SetPARP(85,0.90) ; // Regulates gluon prod. mechanism | |
306 | // SetPARP(86,0.95); // Regulates gluon prod. mechanism | |
307 | break; | |
308 | case kPyDirectGamma: | |
309 | ReadString("PromptPhoton:all = on"); | |
310 | break; | |
311 | case kPyCharmPbPbMNR: | |
312 | case kPyD0PbPbMNR: | |
313 | case kPyDPlusPbPbMNR: | |
314 | case kPyDPlusStrangePbPbMNR: | |
315 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
316 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
317 | // c-cbar single inclusive and double differential distributions. | |
318 | // This parameter settings are meant to work with Pb-Pb collisions | |
319 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
320 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
321 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
322 | ConfigHeavyFlavor(); | |
323 | // Intrinsic <kT> | |
7d09f746 | 324 | ReadString("BeamRemnants:primordialKT = on"); |
325 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
326 | ReadString("BeamRemnants:primordialKThard = 1.304"); | |
327 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
328 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 329 | // Set c-quark mass |
330 | ReadString("ParticleData:mcRun = 1.20"); | |
331 | break; | |
332 | case kPyCharmpPbMNR: | |
333 | case kPyD0pPbMNR: | |
334 | case kPyDPluspPbMNR: | |
335 | case kPyDPlusStrangepPbMNR: | |
336 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
337 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
338 | // c-cbar single inclusive and double differential distributions. | |
339 | // This parameter settings are meant to work with p-Pb collisions | |
340 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
341 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
342 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
343 | ConfigHeavyFlavor(); | |
344 | // Intrinsic <kT> | |
7d09f746 | 345 | ReadString("BeamRemnants:primordialKT = on"); |
346 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
347 | ReadString("BeamRemnants:primordialKThard = 1.16"); | |
348 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
349 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 350 | // Set c-quark mass |
351 | ReadString("ParticleData:mcRun = 1.20"); | |
352 | break; | |
353 | case kPyCharmppMNR: | |
354 | case kPyD0ppMNR: | |
355 | case kPyDPlusppMNR: | |
356 | case kPyDPlusStrangeppMNR: | |
7d09f746 | 357 | case kPyLambdacppMNR: |
cc545eb9 | 358 | // Tuning of Pythia parameters aimed to get a resonable agreement |
359 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
360 | // c-cbar single inclusive and double differential distributions. | |
361 | // This parameter settings are meant to work with pp collisions | |
362 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
363 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
364 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
365 | ConfigHeavyFlavor(); | |
366 | // Intrinsic <kT^2> | |
7d09f746 | 367 | ReadString("BeamRemnants:primordialKT = on"); |
368 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
369 | ReadString("BeamRemnants:primordialKThard = 1."); | |
370 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
371 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 372 | // Set c-quark mass |
373 | ReadString("ParticleData:mcRun = 1.20"); | |
374 | break; | |
375 | case kPyCharmppMNRwmi: | |
376 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
377 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
378 | // c-cbar single inclusive and double differential distributions. | |
379 | // This parameter settings are meant to work with pp collisions | |
380 | // and with kCTEQ5L PDFs. | |
381 | // Added multiple interactions according to ATLAS tune settings. | |
382 | // To get a "reasonable" agreement with MNR results, events have to be | |
383 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
384 | // set to 2.76 GeV. | |
385 | // To get a "perfect" agreement with MNR results, events have to be | |
386 | // generated in four ptHard bins with the following relative | |
387 | // normalizations: | |
388 | // 2.76-3 GeV: 25% | |
389 | // 3-4 GeV: 40% | |
390 | // 4-8 GeV: 29% | |
391 | // >8 GeV: 6% | |
392 | ConfigHeavyFlavor(); | |
393 | // Intrinsic <kT^2> | |
7d09f746 | 394 | ReadString("BeamRemnants:primordialKT = on"); |
395 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
396 | ReadString("BeamRemnants:primordialKThard = 1."); | |
397 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
398 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 399 | // Set c-quark mass |
400 | ReadString("ParticleData:mcRun = 1.20"); | |
401 | AtlasTuning(); | |
402 | break; | |
403 | case kPyBeautyPbPbMNR: | |
404 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
405 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
406 | // b-bbar single inclusive and double differential distributions. | |
407 | // This parameter settings are meant to work with Pb-Pb collisions | |
408 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
409 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
410 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
411 | ConfigHeavyFlavor(); | |
412 | // QCD scales | |
413 | ReadString("SigmaProcess:factorMultFac = 1."); | |
414 | // Intrinsic <kT> | |
7d09f746 | 415 | ReadString("BeamRemnants:primordialKT = on"); |
416 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
417 | ReadString("BeamRemnants:primordialKThard = 2.035"); | |
418 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
419 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 420 | // Set b-quark mass |
421 | ReadString("ParticleData:mbRun = 4.75"); | |
422 | break; | |
423 | case kPyBeautypPbMNR: | |
424 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
425 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
426 | // b-bbar single inclusive and double differential distributions. | |
427 | // This parameter settings are meant to work with p-Pb collisions | |
428 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
429 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
430 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
431 | ConfigHeavyFlavor(); | |
432 | // QCD scales | |
433 | ReadString("SigmaProcess:factorMultFac = 1."); | |
434 | // Intrinsic <kT> | |
7d09f746 | 435 | ReadString("BeamRemnants:primordialKT = on"); |
436 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
437 | ReadString("BeamRemnants:primordialKThard = 1.6"); | |
438 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
439 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 440 | // Set b-quark mass |
441 | ReadString("ParticleData:mbRun = 4.75"); | |
442 | break; | |
443 | case kPyBeautyppMNR: | |
444 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
445 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
446 | // b-bbar single inclusive and double differential distributions. | |
447 | // This parameter settings are meant to work with pp collisions | |
448 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
449 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
450 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
451 | ConfigHeavyFlavor(); | |
452 | // QCD scales | |
453 | ReadString("SigmaProcess:factorMultFac = 1."); | |
454 | // Intrinsic <kT> | |
7d09f746 | 455 | ReadString("BeamRemnants:primordialKT = on"); |
456 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
457 | ReadString("BeamRemnants:primordialKThard = 1.0"); | |
458 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
459 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 460 | // Set b-quark mass |
461 | ReadString("ParticleData:mbRun = 4.75"); | |
462 | break; | |
463 | case kPyBeautyppMNRwmi: | |
464 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
465 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
466 | // b-bbar single inclusive and double differential distributions. | |
467 | // This parameter settings are meant to work with pp collisions | |
468 | // and with kCTEQ5L PDFs. | |
469 | // Added multiple interactions according to ATLAS tune settings. | |
470 | // To get a "reasonable" agreement with MNR results, events have to be | |
471 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
472 | // set to 2.76 GeV. | |
473 | // To get a "perfect" agreement with MNR results, events have to be | |
474 | // generated in four ptHard bins with the following relative | |
475 | // normalizations: | |
476 | // 2.76-4 GeV: 5% | |
477 | // 4-6 GeV: 31% | |
478 | // 6-8 GeV: 28% | |
479 | // >8 GeV: 36% | |
480 | ConfigHeavyFlavor(); | |
481 | // QCD scales | |
482 | ReadString("SigmaProcess:factorMultFac = 1."); | |
483 | // Intrinsic <kT> | |
7d09f746 | 484 | ReadString("BeamRemnants:primordialKT = on"); |
485 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
486 | ReadString("BeamRemnants:primordialKThard = 1.0"); | |
487 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
488 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 489 | // Set b-quark mass |
490 | ReadString("ParticleData:mbRun = 4.75"); | |
491 | AtlasTuning(); | |
492 | break; | |
493 | case kPyW: | |
494 | //Inclusive production of W+/- | |
495 | //f fbar -> W+ | |
496 | ReadString("WeakSingleBoson:ffbar2W = on"); | |
497 | // Initial/final parton shower on (Pythia default) | |
498 | // With parton showers on we are generating "W inclusive process" | |
499 | ReadString("PartonLevel:ISR = on"); | |
500 | ReadString("PartonLevel:FSR = on"); | |
501 | break; | |
502 | case kPyZ: | |
503 | //Inclusive production of Z | |
504 | //f fbar -> Z/gamma | |
505 | ReadString("WeakSingleBoson:ffbar2gmZ = on"); | |
506 | //only Z included, not gamma | |
507 | ReadString("WeakZ0:gmZmode = 2"); | |
508 | // Initial/final parton shower on (Pythia default) | |
509 | // With parton showers on we are generating "Z inclusive process" | |
510 | ReadString("PartonLevel:ISR = on"); | |
511 | ReadString("PartonLevel:FSR = on"); | |
512 | break; | |
1310079f | 513 | case kPyMbWithDirectPhoton: |
514 | case kPyBeautyJets: | |
515 | case kPyMbAtlasTuneMC09: | |
516 | break; | |
cc545eb9 | 517 | } |
518 | // | |
519 | // Initialize PYTHIA | |
520 | // SetMSTP(41,1); // all resonance decays switched on | |
521 | Initialize(2212, 2212, fEcms); | |
522 | } | |
523 | ||
524 | void AliPythia8::SetNuclei(Int_t /*a1*/, Int_t /*a2*/) | |
525 | { | |
526 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
527 | // The MSTP array in the PYPARS common block is used to enable and | |
528 | // select the nuclear structure functions. | |
529 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
530 | // =1: internal PYTHIA acording to MSTP(51) | |
531 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
532 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
533 | // MSTP(192) : Mass number of nucleus side 1 | |
534 | // MSTP(193) : Mass number of nucleus side 2 | |
535 | // SetMSTP(52,2); | |
536 | // SetMSTP(192, a1); | |
537 | // SetMSTP(193, a2); | |
538 | } | |
539 | ||
540 | ||
541 | AliPythia8* AliPythia8::Instance() | |
542 | { | |
543 | // Set random number generator | |
544 | if (fgAliPythia8) { | |
545 | return fgAliPythia8; | |
546 | } else { | |
547 | fgAliPythia8 = new AliPythia8(); | |
548 | return fgAliPythia8; | |
549 | } | |
550 | } | |
551 | ||
552 | void AliPythia8::PrintParticles() | |
553 | { | |
554 | // Print list of particl properties | |
555 | ReadString("Main:showAllParticleData"); | |
556 | } | |
557 | ||
558 | void AliPythia8::ResetDecayTable() | |
559 | { | |
560 | // Set default values for pythia decay switches | |
561 | // Int_t i; | |
562 | // for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
563 | // for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
564 | } | |
565 | ||
566 | void AliPythia8::SetDecayTable() | |
567 | { | |
568 | // Set default values for pythia decay switches | |
569 | // | |
570 | // Int_t i; | |
571 | // for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
572 | // for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
573 | } | |
574 | ||
575 | void AliPythia8::Pyclus(Int_t& njet) | |
576 | { | |
577 | // Call Pythia clustering algorithm | |
578 | // | |
579 | Bool_t ok = fClusterJet.analyze(Pythia8()->event, fYScale, fPtScale, fNJetMin, fNJetMax); | |
580 | njet = 0; | |
581 | if (ok) njet = fClusterJet.size(); | |
582 | } | |
583 | ||
584 | void AliPythia8::Pycell(Int_t& njet) | |
585 | { | |
586 | // Call Pythia jet reconstruction algorithm | |
587 | // | |
588 | Bool_t ok = fCellJet.analyze(Pythia8()->event, fMinEtJet, fRJet, fEtSeed); | |
589 | njet = 0; | |
590 | if (ok) njet = fCellJet.size(); | |
591 | } | |
592 | ||
593 | void AliPythia8::GetJet(Int_t i, Float_t& px, Float_t& py, Float_t& pz, Float_t& e) | |
594 | { | |
595 | // Get jet number i | |
596 | Float_t et = fCellJet.eT(i); | |
597 | px = et * TMath::Cos(fCellJet.phiWeighted(i)); | |
598 | py = et * TMath::Sin(fCellJet.phiWeighted(i)); | |
599 | pz = et * TMath::SinH(fCellJet.etaWeighted(i)); | |
600 | e = et * TMath::CosH(fCellJet.etaWeighted(i)); | |
601 | } | |
602 | ||
603 | void AliPythia8::GenerateEvent() | |
604 | { | |
605 | // Generate one event | |
b584e2f5 | 606 | AliTPythia8::GenerateEvent(); |
cc545eb9 | 607 | } |
608 | ||
609 | void AliPythia8::GenerateMIEvent() | |
610 | { | |
611 | // New multiple interaction scenario | |
612 | AliWarning("Not implemented. No event will be generated"); | |
613 | } | |
614 | ||
615 | void AliPythia8::PrintStatistics() | |
616 | { | |
617 | // End of run statistics | |
b584e2f5 | 618 | AliTPythia8::PrintStatistics(); |
cc545eb9 | 619 | } |
620 | ||
621 | void AliPythia8::EventListing() | |
622 | { | |
623 | // End of run statistics | |
b584e2f5 | 624 | AliTPythia8::EventListing(); |
cc545eb9 | 625 | } |
626 | ||
627 | Int_t AliPythia8::ProcessCode() | |
628 | { | |
629 | // Returns the subprocess code for the current event | |
60747902 | 630 | return Pythia8()->info.code(); |
cc545eb9 | 631 | } |
632 | ||
633 | void AliPythia8::ConfigHeavyFlavor() | |
634 | { | |
635 | // | |
636 | // Default configuration for Heavy Flavor production | |
637 | // | |
638 | // All QCD processes | |
639 | // | |
640 | ReadString("HardQCD:all = on"); | |
641 | ||
642 | // No multiple interactions | |
643 | ReadString("PartonLevel:MI = off"); | |
644 | ReadString("MultipleInteractions:pTmin = 0.0"); | |
645 | ReadString("MultipleInteractions:pT0Ref = 0.0"); | |
646 | ||
647 | // Initial/final parton shower on (Pythia default) | |
648 | ReadString("PartonLevel:ISR = on"); | |
649 | ReadString("PartonLevel:FSR = on"); | |
650 | ||
651 | // 2nd order alpha_s | |
652 | ReadString("SigmaProcess:alphaSorder = 2"); | |
653 | ||
654 | // QCD scales | |
655 | ReadString("SigmaProcess:renormScale2 = 2"); | |
656 | ReadString("SigmaProcess:renormMultFac = 1."); | |
657 | } | |
658 | ||
659 | void AliPythia8::AtlasTuning() | |
660 | { | |
661 | // | |
662 | // Configuration for the ATLAS tuning | |
663 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ5L).Data())); | |
664 | ReadString("PartonLevel:MI = on"); | |
665 | ReadString("MultipleInteractions:pTmin = 1.9"); | |
666 | ReadString("MultipleInteractions:pT0Ref = 1.8"); | |
667 | ReadString("MultipleInteractions:ecmRef = 1000."); | |
668 | ReadString("MultipleInteractions:expPow = 0.16"); | |
669 | ReadString("MultipleInteractions:bProfile = 2"); | |
670 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
671 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
672 | // SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
673 | // SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
674 | ReadString("SigmaProcess:factorMultFac = 1."); | |
675 | } | |
676 | ||
677 | void AliPythia8::SetPtHardRange(Float_t ptmin, Float_t ptmax) | |
678 | { | |
679 | // Set the pt hard range | |
680 | ReadString(Form("PhaseSpace:pTHatMin = %13.3f", ptmin)); | |
681 | ReadString(Form("PhaseSpace:pTHatMax = %13.3f", ptmax)); | |
682 | } | |
683 | ||
684 | void AliPythia8::SetYHardRange(Float_t /*ymin*/, Float_t /*ymax*/) | |
685 | { | |
686 | // Set the y hard range | |
687 | printf("YHardRange not implemented in Pythia8 !!!\n"); | |
688 | ||
689 | } | |
690 | ||
691 | ||
692 | void AliPythia8::SetFragmentation(Int_t flag) | |
693 | { | |
694 | // Switch fragmentation on/off | |
695 | if (flag) { | |
696 | ReadString("HadronLevel:Hadronize = on"); | |
697 | } else { | |
698 | ReadString("HadronLevel:Hadronize = off"); | |
699 | } | |
700 | } | |
701 | ||
702 | void AliPythia8::SetInitialAndFinalStateRadiation(Int_t flag1, Int_t flag2) | |
703 | { | |
704 | // initial state radiation | |
705 | if (flag1) { | |
706 | ReadString("PartonLevel:ISR = on"); | |
707 | } else { | |
708 | ReadString("PartonLevel:ISR = off"); | |
709 | } | |
710 | // final state radiation | |
711 | if (flag2) { | |
712 | ReadString("PartonLevel:FSR = on"); | |
713 | } else { | |
714 | ReadString("PartonLevel:FSR = off"); | |
715 | } | |
716 | } | |
717 | ||
718 | void AliPythia8::SetIntrinsicKt(Float_t kt) | |
719 | { | |
c014d45a | 720 | // Set the intrinsic kt |
7d09f746 | 721 | ReadString("BeamRemnants:primordialKT = on"); |
722 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
723 | ReadString(Form("BeamRemnants:primordialKThard = %13.3f", kt)); | |
724 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
725 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 726 | } |
727 | ||
728 | void AliPythia8::SwitchHFOff() | |
729 | { | |
730 | // Switch off heavy flavor | |
731 | // Maximum number of quark flavours used in pdf | |
732 | ReadString("PDFinProcess:nQuarkIn = 3"); | |
733 | // Maximum number of flavors that can be used in showers | |
734 | ReadString("TimeShower:nGluonToQuark = 3"); | |
735 | ReadString("SpaceShower:nQuarkIn = 3"); | |
736 | ||
737 | ||
738 | } | |
739 | ||
740 | void AliPythia8::SetPycellParameters(Float_t etaMax, Int_t nEta, Int_t nPhi, | |
741 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) | |
742 | { | |
743 | // Set pycell parameters | |
744 | fCellJet = Pythia8::CellJet( etaMax, nEta, nPhi, 2, 0, 0., 0., thresh); | |
745 | fEtSeed = etseed; | |
746 | fMinEtJet = minet; | |
747 | fRJet = r; | |
748 | } | |
749 | ||
750 | void AliPythia8::ModifiedSplitting() | |
751 | { | |
752 | // | |
753 | // We have to see how to implement this in Pythia8 !!! | |
754 | // | |
755 | // Modified splitting probability as a model for quenching | |
756 | // SetPARJ(200, 0.8); | |
757 | // SetMSTJ(41, 1); // QCD radiation only | |
758 | // SetMSTJ(42, 2); // angular ordering | |
759 | // SetMSTJ(44, 2); // option to run alpha_s | |
760 | // SetMSTJ(47, 0); // No correction back to hard scattering element | |
761 | // SetMSTJ(50, 0); // No coherence in first branching | |
762 | // SetPARJ(82, 1.); // Cut off for parton showers | |
763 | } | |
764 | ||
765 | ||
766 | void AliPythia8::InitQuenching(Float_t /*cMin*/, Float_t /*cMax*/, Float_t /*k*/, Int_t /*iECMethod*/, Float_t /*zmax*/, Int_t /*ngmax*/) | |
767 | { | |
768 | // | |
769 | // | |
770 | AliWarning("Not implemented !"); | |
771 | } | |
772 | ||
773 | void AliPythia8::SwitchHadronisationOff() | |
774 | { | |
775 | // Switch off hadronisation | |
776 | ReadString("HadronLevel:Hadronize = off"); | |
777 | } | |
778 | ||
779 | void AliPythia8::SwitchHadronisationOn() | |
780 | { | |
781 | // Switch on hadronisarion | |
782 | ReadString("HadronLevel:Hadronize = on"); | |
783 | } | |
784 | ||
785 | ||
786 | void AliPythia8::GetXandQ(Float_t& x1, Float_t& x2, Float_t& q) | |
787 | { | |
788 | // Get x1, x2 and Q for this event | |
789 | ||
790 | q = Pythia8()->info.QFac(); | |
791 | x1 = Pythia8()->info.x1(); | |
792 | x2 = Pythia8()->info.x2(); | |
793 | ||
794 | } | |
795 | ||
796 | Float_t AliPythia8::GetXSection() | |
797 | { | |
798 | // Get the total cross-section | |
799 | return Pythia8()->info.sigmaGen(); | |
800 | } | |
801 | ||
802 | Float_t AliPythia8::GetPtHard() | |
803 | { | |
804 | // Get the pT hard for this event | |
805 | return Pythia8()->info.pTHat(); | |
806 | } | |
807 | ||
808 | ||
809 | ||
810 | ||
811 | AliPythia8& AliPythia8::operator=(const AliPythia8& rhs) | |
812 | { | |
813 | // Assignment operator | |
814 | rhs.Copy(*this); | |
815 | return *this; | |
816 | } | |
817 | ||
818 | void AliPythia8::Copy(TObject&) const | |
819 | { | |
820 | // | |
821 | // Copy | |
822 | // | |
823 | Fatal("Copy","Not implemented!\n"); | |
824 | } | |
825 | ||
826 | // | |
827 | // To be implemented | |
828 | // | |
829 | void AliPythia8::SetNumberOfParticles(Int_t /*i*/) | |
830 | { | |
831 | AliWarning("Not implemented"); | |
832 | } | |
833 | ||
834 | void AliPythia8::EditEventList(Int_t /*i*/) | |
835 | { | |
836 | AliWarning("Not implemented"); | |
837 | } | |
838 | ||
839 | void AliPythia8::Pyquen(Double_t /*a*/, Int_t /*b*/, Double_t /*c*/) | |
840 | { | |
841 | AliWarning("Cannot be used with Pythia8"); | |
842 | } | |
843 | ||
844 | void AliPythia8::HadronizeEvent() | |
845 | { | |
846 | // Needs access to HadronLevel ? | |
847 | AliWarning("Not yet implemented"); | |
848 | } | |
849 | ||
850 | void AliPythia8::GetQuenchingParameters(Double_t& /*xp*/, Double_t& /*yp*/, Double_t* /*z[4]*/) | |
851 | { | |
852 | AliWarning("Not yet implemented"); | |
853 | } | |
854 | ||
855 | void AliPythia8::LoadEvent(AliStack* /*stack*/, Int_t /*flag*/, Int_t /*reHadr*/) | |
856 | { | |
857 | AliWarning("Not yet implemented"); | |
858 | } |