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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 | ||
75d4f39e | 98 | void AliPythia8::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc, Int_t tune) |
cc545eb9 | 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. | |
75d4f39e | 136 | ReadString("MultipartonInteractions:bProfile = 2"); |
137 | ReadString("MultipartonInteractions:coreFraction = 0.5"); | |
138 | ReadString("MultipartonInteractions:coreRadius = 0.4"); | |
cc545eb9 | 139 | // pT0. |
75d4f39e | 140 | ReadString("MultipartonInteractions:pTmin = 2.0"); |
cc545eb9 | 141 | // Reference energy for pT0 and energy rescaling pace. |
75d4f39e | 142 | ReadString("MultipartonInteractions:ecmRef = 1800."); |
143 | ReadString("MultipartonInteractions:ecmPow = 0.25"); | |
cc545eb9 | 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"); | |
75d4f39e | 234 | if (tune == -1) AtlasTuning(); |
cc545eb9 | 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"); | |
75d4f39e | 244 | ReadString("SoftQCD:doubleDiffractive = on"); |
245 | if (tune > -1) ReadString(Form("Tune:pp = %3d", tune)); | |
cc545eb9 | 246 | break; |
247 | case kPyLhwgMb: | |
248 | // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120 | |
249 | // -> Pythia 6.3 or above is needed | |
250 | // | |
251 | ReadString("SoftQCD:minBias = on"); | |
252 | ReadString("SoftQCD:singleDiffractive = on"); | |
253 | ReadString("SoftQCD:doubleDiffractive = on"); | |
254 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ6ll).Data())); | |
255 | ||
256 | // SetMSTP(68,1); | |
257 | // SetMSTP(70,2); | |
258 | // ReadString("PartonLevel:MI = on"); | |
259 | // Double Gaussian matter distribution. | |
260 | ReadString("MultipleInteractions:bProfile = 2"); | |
261 | ReadString("MultipleInteractions:coreFraction = 0.5"); | |
262 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
263 | ReadString("MultipleInteractions:expPow = 0.16"); | |
264 | ReadString("MultipleInteractions:pTmin = 2.3"); | |
265 | // SetMSTP(88,1); | |
266 | // SetPARP(85,0.9); // Regulates gluon prod. mechanism | |
267 | break; | |
268 | case kPyMbNonDiffr: | |
269 | // Minimum Bias pp-Collisions | |
270 | // | |
271 | // | |
272 | // select Pythia min. bias model | |
273 | ReadString("SoftQCD:minBias = on"); | |
274 | AtlasTuning(); | |
275 | break; | |
276 | case kPyMbMSEL1: | |
277 | ConfigHeavyFlavor(); | |
278 | // Intrinsic <kT^2> | |
7d09f746 | 279 | ReadString("BeamRemnants:primordialKT = on"); |
280 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
281 | ReadString("BeamRemnants:primordialKThard = 1."); | |
282 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
283 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 284 | // Set Q-quark mass |
285 | ReadString("ParticleData:mcRun = 1.20"); | |
286 | ReadString("ParticleData:mbRun = 4.78"); | |
287 | // Atlas Tuning | |
288 | AtlasTuning(); | |
289 | break; | |
290 | case kPyJets: | |
291 | // | |
292 | // QCD Jets | |
293 | // | |
294 | ReadString("HardQCD:all = on"); | |
295 | // | |
296 | // Pythia Tune A (CDF) | |
297 | // | |
298 | ReadString("PartonLevel:MI = on"); | |
299 | ReadString("MultipleInteractions:pTmin = 2.0"); | |
300 | ReadString("MultipleInteractions:pT0Ref = 2.8"); | |
301 | ReadString("MultipleInteractions:ecmRef = 1800."); | |
302 | ReadString("MultipleInteractions:expPow = 0.25"); | |
303 | ReadString("MultipleInteractions:bProfile = 2"); | |
304 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
305 | ReadString("MultipleInteractions:coreRadius = 0.4"); | |
306 | ReadString("SigmaProcess:factorMultFac = 2.5"); | |
307 | // SetPARP(85,0.90) ; // Regulates gluon prod. mechanism | |
308 | // SetPARP(86,0.95); // Regulates gluon prod. mechanism | |
309 | break; | |
310 | case kPyDirectGamma: | |
311 | ReadString("PromptPhoton:all = on"); | |
312 | break; | |
313 | case kPyCharmPbPbMNR: | |
314 | case kPyD0PbPbMNR: | |
315 | case kPyDPlusPbPbMNR: | |
316 | case kPyDPlusStrangePbPbMNR: | |
317 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
318 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
319 | // c-cbar single inclusive and double differential distributions. | |
320 | // This parameter settings are meant to work with Pb-Pb collisions | |
321 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
322 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
323 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
324 | ConfigHeavyFlavor(); | |
325 | // Intrinsic <kT> | |
7d09f746 | 326 | ReadString("BeamRemnants:primordialKT = on"); |
327 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
328 | ReadString("BeamRemnants:primordialKThard = 1.304"); | |
329 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
330 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 331 | // Set c-quark mass |
332 | ReadString("ParticleData:mcRun = 1.20"); | |
333 | break; | |
334 | case kPyCharmpPbMNR: | |
335 | case kPyD0pPbMNR: | |
336 | case kPyDPluspPbMNR: | |
337 | case kPyDPlusStrangepPbMNR: | |
338 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
339 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
340 | // c-cbar single inclusive and double differential distributions. | |
341 | // This parameter settings are meant to work with p-Pb collisions | |
342 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
343 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
344 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
345 | ConfigHeavyFlavor(); | |
346 | // Intrinsic <kT> | |
7d09f746 | 347 | ReadString("BeamRemnants:primordialKT = on"); |
348 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
349 | ReadString("BeamRemnants:primordialKThard = 1.16"); | |
350 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
351 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 352 | // Set c-quark mass |
353 | ReadString("ParticleData:mcRun = 1.20"); | |
354 | break; | |
355 | case kPyCharmppMNR: | |
356 | case kPyD0ppMNR: | |
357 | case kPyDPlusppMNR: | |
358 | case kPyDPlusStrangeppMNR: | |
7d09f746 | 359 | case kPyLambdacppMNR: |
cc545eb9 | 360 | // Tuning of Pythia parameters aimed to get a resonable agreement |
361 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
362 | // c-cbar single inclusive and double differential distributions. | |
363 | // This parameter settings are meant to work with pp collisions | |
364 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
365 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
366 | // has to be set to 2.1GeV. Example in ConfigCharmPPR.C. | |
367 | ConfigHeavyFlavor(); | |
368 | // Intrinsic <kT^2> | |
7d09f746 | 369 | ReadString("BeamRemnants:primordialKT = on"); |
370 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
371 | ReadString("BeamRemnants:primordialKThard = 1."); | |
372 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
373 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 374 | // Set c-quark mass |
375 | ReadString("ParticleData:mcRun = 1.20"); | |
376 | break; | |
377 | case kPyCharmppMNRwmi: | |
378 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
379 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
380 | // c-cbar single inclusive and double differential distributions. | |
381 | // This parameter settings are meant to work with pp collisions | |
382 | // and with kCTEQ5L PDFs. | |
383 | // Added multiple interactions according to ATLAS tune settings. | |
384 | // To get a "reasonable" agreement with MNR results, events have to be | |
385 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
386 | // set to 2.76 GeV. | |
387 | // To get a "perfect" agreement with MNR results, events have to be | |
388 | // generated in four ptHard bins with the following relative | |
389 | // normalizations: | |
390 | // 2.76-3 GeV: 25% | |
391 | // 3-4 GeV: 40% | |
392 | // 4-8 GeV: 29% | |
393 | // >8 GeV: 6% | |
394 | ConfigHeavyFlavor(); | |
395 | // Intrinsic <kT^2> | |
7d09f746 | 396 | ReadString("BeamRemnants:primordialKT = on"); |
397 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
398 | ReadString("BeamRemnants:primordialKThard = 1."); | |
399 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
400 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 401 | // Set c-quark mass |
402 | ReadString("ParticleData:mcRun = 1.20"); | |
403 | AtlasTuning(); | |
404 | break; | |
405 | case kPyBeautyPbPbMNR: | |
406 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
407 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
408 | // b-bbar single inclusive and double differential distributions. | |
409 | // This parameter settings are meant to work with Pb-Pb collisions | |
410 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
411 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
412 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
413 | ConfigHeavyFlavor(); | |
414 | // QCD scales | |
415 | ReadString("SigmaProcess:factorMultFac = 1."); | |
416 | // Intrinsic <kT> | |
7d09f746 | 417 | ReadString("BeamRemnants:primordialKT = on"); |
418 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
419 | ReadString("BeamRemnants:primordialKThard = 2.035"); | |
420 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
421 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 422 | // Set b-quark mass |
423 | ReadString("ParticleData:mbRun = 4.75"); | |
424 | break; | |
425 | case kPyBeautypPbMNR: | |
426 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
427 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
428 | // b-bbar single inclusive and double differential distributions. | |
429 | // This parameter settings are meant to work with p-Pb collisions | |
430 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
431 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
432 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
433 | ConfigHeavyFlavor(); | |
434 | // QCD scales | |
435 | ReadString("SigmaProcess:factorMultFac = 1."); | |
436 | // Intrinsic <kT> | |
7d09f746 | 437 | ReadString("BeamRemnants:primordialKT = on"); |
438 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
439 | ReadString("BeamRemnants:primordialKThard = 1.6"); | |
440 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
441 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 442 | // Set b-quark mass |
443 | ReadString("ParticleData:mbRun = 4.75"); | |
444 | break; | |
445 | case kPyBeautyppMNR: | |
446 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
447 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
448 | // b-bbar single inclusive and double differential distributions. | |
449 | // This parameter settings are meant to work with pp collisions | |
450 | // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs. | |
451 | // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard) | |
452 | // has to be set to 2.75GeV. Example in ConfigBeautyPPR.C. | |
453 | ConfigHeavyFlavor(); | |
454 | // QCD scales | |
455 | ReadString("SigmaProcess:factorMultFac = 1."); | |
456 | // Intrinsic <kT> | |
7d09f746 | 457 | ReadString("BeamRemnants:primordialKT = on"); |
458 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
459 | ReadString("BeamRemnants:primordialKThard = 1.0"); | |
460 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
461 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 462 | // Set b-quark mass |
463 | ReadString("ParticleData:mbRun = 4.75"); | |
464 | break; | |
465 | case kPyBeautyppMNRwmi: | |
466 | // Tuning of Pythia parameters aimed to get a resonable agreement | |
467 | // between with the NLO calculation by Mangano, Nason, Ridolfi for the | |
468 | // b-bbar single inclusive and double differential distributions. | |
469 | // This parameter settings are meant to work with pp collisions | |
470 | // and with kCTEQ5L PDFs. | |
471 | // Added multiple interactions according to ATLAS tune settings. | |
472 | // To get a "reasonable" agreement with MNR results, events have to be | |
473 | // generated with the minimum ptHard (AliGenPythia::SetPtHard) | |
474 | // set to 2.76 GeV. | |
475 | // To get a "perfect" agreement with MNR results, events have to be | |
476 | // generated in four ptHard bins with the following relative | |
477 | // normalizations: | |
478 | // 2.76-4 GeV: 5% | |
479 | // 4-6 GeV: 31% | |
480 | // 6-8 GeV: 28% | |
481 | // >8 GeV: 36% | |
482 | ConfigHeavyFlavor(); | |
483 | // QCD scales | |
484 | ReadString("SigmaProcess:factorMultFac = 1."); | |
485 | // Intrinsic <kT> | |
7d09f746 | 486 | ReadString("BeamRemnants:primordialKT = on"); |
487 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
488 | ReadString("BeamRemnants:primordialKThard = 1.0"); | |
489 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
490 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 491 | // Set b-quark mass |
492 | ReadString("ParticleData:mbRun = 4.75"); | |
493 | AtlasTuning(); | |
494 | break; | |
495 | case kPyW: | |
496 | //Inclusive production of W+/- | |
497 | //f fbar -> W+ | |
498 | ReadString("WeakSingleBoson:ffbar2W = on"); | |
499 | // Initial/final parton shower on (Pythia default) | |
500 | // With parton showers on we are generating "W inclusive process" | |
501 | ReadString("PartonLevel:ISR = on"); | |
502 | ReadString("PartonLevel:FSR = on"); | |
503 | break; | |
504 | case kPyZ: | |
505 | //Inclusive production of Z | |
506 | //f fbar -> Z/gamma | |
507 | ReadString("WeakSingleBoson:ffbar2gmZ = on"); | |
508 | //only Z included, not gamma | |
509 | ReadString("WeakZ0:gmZmode = 2"); | |
510 | // Initial/final parton shower on (Pythia default) | |
511 | // With parton showers on we are generating "Z inclusive process" | |
512 | ReadString("PartonLevel:ISR = on"); | |
513 | ReadString("PartonLevel:FSR = on"); | |
df607629 | 514 | break; |
515 | case kPyZgamma: | |
516 | //Inclusive production of Z/gamma* | |
517 | //f fbar -> Z/gamma | |
518 | ReadString("WeakSingleBoson:ffbar2gmZ = on"); | |
519 | // Initial/final parton shower on (Pythia default) | |
520 | // With parton showers on we are generating "Z inclusive process" | |
521 | ReadString("PartonLevel:ISR = on"); | |
522 | ReadString("PartonLevel:FSR = on"); | |
523 | break; | |
9a8774a1 | 524 | case kPyMBRSingleDiffraction: |
f0240439 | 525 | ReadString("Diffraction:PomFlux = 5"); |
9a8774a1 | 526 | ReadString("SoftQCD:singleDiffractive = on"); |
527 | break; | |
528 | case kPyMBRDoubleDiffraction: | |
f0240439 | 529 | ReadString("Diffraction:PomFlux = 5"); |
9a8774a1 | 530 | ReadString("SoftQCD:doubleDiffractive = on"); |
531 | break; | |
532 | case kPyMBRCentralDiffraction: | |
f0240439 | 533 | ReadString("Diffraction:PomFlux = 5"); |
9a8774a1 | 534 | ReadString("SoftQCD:centralDiffractive = on"); |
535 | break; | |
1310079f | 536 | case kPyMbWithDirectPhoton: |
537 | case kPyBeautyJets: | |
538 | case kPyMbAtlasTuneMC09: | |
539 | break; | |
cc545eb9 | 540 | } |
541 | // | |
542 | // Initialize PYTHIA | |
543 | // SetMSTP(41,1); // all resonance decays switched on | |
544 | Initialize(2212, 2212, fEcms); | |
545 | } | |
546 | ||
547 | void AliPythia8::SetNuclei(Int_t /*a1*/, Int_t /*a2*/) | |
548 | { | |
549 | // Treat protons as inside nuclei with mass numbers a1 and a2 | |
550 | // The MSTP array in the PYPARS common block is used to enable and | |
551 | // select the nuclear structure functions. | |
552 | // MSTP(52) : (D=1) choice of proton and nuclear structure-function library | |
553 | // =1: internal PYTHIA acording to MSTP(51) | |
554 | // =2: PDFLIB proton s.f., with MSTP(51) = 1000xNGROUP+NSET | |
555 | // If the following mass number both not equal zero, nuclear corrections of the stf are used. | |
556 | // MSTP(192) : Mass number of nucleus side 1 | |
557 | // MSTP(193) : Mass number of nucleus side 2 | |
558 | // SetMSTP(52,2); | |
559 | // SetMSTP(192, a1); | |
560 | // SetMSTP(193, a2); | |
561 | } | |
562 | ||
563 | ||
564 | AliPythia8* AliPythia8::Instance() | |
565 | { | |
566 | // Set random number generator | |
567 | if (fgAliPythia8) { | |
568 | return fgAliPythia8; | |
569 | } else { | |
570 | fgAliPythia8 = new AliPythia8(); | |
571 | return fgAliPythia8; | |
572 | } | |
573 | } | |
574 | ||
575 | void AliPythia8::PrintParticles() | |
576 | { | |
577 | // Print list of particl properties | |
578 | ReadString("Main:showAllParticleData"); | |
579 | } | |
580 | ||
581 | void AliPythia8::ResetDecayTable() | |
582 | { | |
583 | // Set default values for pythia decay switches | |
584 | // Int_t i; | |
585 | // for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]); | |
586 | // for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]); | |
587 | } | |
588 | ||
589 | void AliPythia8::SetDecayTable() | |
590 | { | |
591 | // Set default values for pythia decay switches | |
592 | // | |
593 | // Int_t i; | |
594 | // for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1); | |
595 | // for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1); | |
596 | } | |
597 | ||
598 | void AliPythia8::Pyclus(Int_t& njet) | |
599 | { | |
600 | // Call Pythia clustering algorithm | |
601 | // | |
602 | Bool_t ok = fClusterJet.analyze(Pythia8()->event, fYScale, fPtScale, fNJetMin, fNJetMax); | |
603 | njet = 0; | |
604 | if (ok) njet = fClusterJet.size(); | |
605 | } | |
606 | ||
607 | void AliPythia8::Pycell(Int_t& njet) | |
608 | { | |
609 | // Call Pythia jet reconstruction algorithm | |
610 | // | |
611 | Bool_t ok = fCellJet.analyze(Pythia8()->event, fMinEtJet, fRJet, fEtSeed); | |
612 | njet = 0; | |
613 | if (ok) njet = fCellJet.size(); | |
614 | } | |
615 | ||
616 | void AliPythia8::GetJet(Int_t i, Float_t& px, Float_t& py, Float_t& pz, Float_t& e) | |
617 | { | |
618 | // Get jet number i | |
619 | Float_t et = fCellJet.eT(i); | |
620 | px = et * TMath::Cos(fCellJet.phiWeighted(i)); | |
621 | py = et * TMath::Sin(fCellJet.phiWeighted(i)); | |
622 | pz = et * TMath::SinH(fCellJet.etaWeighted(i)); | |
623 | e = et * TMath::CosH(fCellJet.etaWeighted(i)); | |
624 | } | |
625 | ||
626 | void AliPythia8::GenerateEvent() | |
627 | { | |
628 | // Generate one event | |
b584e2f5 | 629 | AliTPythia8::GenerateEvent(); |
cc545eb9 | 630 | } |
631 | ||
632 | void AliPythia8::GenerateMIEvent() | |
633 | { | |
634 | // New multiple interaction scenario | |
635 | AliWarning("Not implemented. No event will be generated"); | |
636 | } | |
637 | ||
638 | void AliPythia8::PrintStatistics() | |
639 | { | |
640 | // End of run statistics | |
b584e2f5 | 641 | AliTPythia8::PrintStatistics(); |
cc545eb9 | 642 | } |
643 | ||
644 | void AliPythia8::EventListing() | |
645 | { | |
646 | // End of run statistics | |
b584e2f5 | 647 | AliTPythia8::EventListing(); |
cc545eb9 | 648 | } |
649 | ||
650 | Int_t AliPythia8::ProcessCode() | |
651 | { | |
652 | // Returns the subprocess code for the current event | |
60747902 | 653 | return Pythia8()->info.code(); |
cc545eb9 | 654 | } |
655 | ||
656 | void AliPythia8::ConfigHeavyFlavor() | |
657 | { | |
658 | // | |
659 | // Default configuration for Heavy Flavor production | |
660 | // | |
661 | // All QCD processes | |
662 | // | |
663 | ReadString("HardQCD:all = on"); | |
664 | ||
665 | // No multiple interactions | |
666 | ReadString("PartonLevel:MI = off"); | |
667 | ReadString("MultipleInteractions:pTmin = 0.0"); | |
668 | ReadString("MultipleInteractions:pT0Ref = 0.0"); | |
669 | ||
670 | // Initial/final parton shower on (Pythia default) | |
671 | ReadString("PartonLevel:ISR = on"); | |
672 | ReadString("PartonLevel:FSR = on"); | |
673 | ||
674 | // 2nd order alpha_s | |
675 | ReadString("SigmaProcess:alphaSorder = 2"); | |
676 | ||
677 | // QCD scales | |
678 | ReadString("SigmaProcess:renormScale2 = 2"); | |
679 | ReadString("SigmaProcess:renormMultFac = 1."); | |
680 | } | |
681 | ||
682 | void AliPythia8::AtlasTuning() | |
683 | { | |
684 | // | |
685 | // Configuration for the ATLAS tuning | |
686 | ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(kCTEQ5L).Data())); | |
687 | ReadString("PartonLevel:MI = on"); | |
688 | ReadString("MultipleInteractions:pTmin = 1.9"); | |
689 | ReadString("MultipleInteractions:pT0Ref = 1.8"); | |
690 | ReadString("MultipleInteractions:ecmRef = 1000."); | |
691 | ReadString("MultipleInteractions:expPow = 0.16"); | |
692 | ReadString("MultipleInteractions:bProfile = 2"); | |
693 | ReadString("MultipleInteractions:coreFraction = 0.16"); | |
694 | ReadString("MultipleInteractions:coreRadius = 0.5"); | |
695 | // SetPARP(85,0.33); // Regulates gluon prod. mechanism | |
696 | // SetPARP(86,0.66); // Regulates gluon prod. mechanism | |
697 | ReadString("SigmaProcess:factorMultFac = 1."); | |
75d4f39e | 698 | |
cc545eb9 | 699 | } |
700 | ||
701 | void AliPythia8::SetPtHardRange(Float_t ptmin, Float_t ptmax) | |
702 | { | |
703 | // Set the pt hard range | |
704 | ReadString(Form("PhaseSpace:pTHatMin = %13.3f", ptmin)); | |
705 | ReadString(Form("PhaseSpace:pTHatMax = %13.3f", ptmax)); | |
706 | } | |
707 | ||
708 | void AliPythia8::SetYHardRange(Float_t /*ymin*/, Float_t /*ymax*/) | |
709 | { | |
710 | // Set the y hard range | |
711 | printf("YHardRange not implemented in Pythia8 !!!\n"); | |
712 | ||
713 | } | |
714 | ||
715 | ||
716 | void AliPythia8::SetFragmentation(Int_t flag) | |
717 | { | |
718 | // Switch fragmentation on/off | |
719 | if (flag) { | |
720 | ReadString("HadronLevel:Hadronize = on"); | |
721 | } else { | |
722 | ReadString("HadronLevel:Hadronize = off"); | |
723 | } | |
724 | } | |
725 | ||
726 | void AliPythia8::SetInitialAndFinalStateRadiation(Int_t flag1, Int_t flag2) | |
727 | { | |
728 | // initial state radiation | |
729 | if (flag1) { | |
730 | ReadString("PartonLevel:ISR = on"); | |
731 | } else { | |
732 | ReadString("PartonLevel:ISR = off"); | |
733 | } | |
734 | // final state radiation | |
735 | if (flag2) { | |
736 | ReadString("PartonLevel:FSR = on"); | |
737 | } else { | |
738 | ReadString("PartonLevel:FSR = off"); | |
739 | } | |
740 | } | |
741 | ||
742 | void AliPythia8::SetIntrinsicKt(Float_t kt) | |
743 | { | |
c014d45a | 744 | // Set the intrinsic kt |
7d09f746 | 745 | ReadString("BeamRemnants:primordialKT = on"); |
746 | ReadString("BeamRemnants:primordialKTsoft = 0."); | |
747 | ReadString(Form("BeamRemnants:primordialKThard = %13.3f", kt)); | |
748 | ReadString("BeamRemnants:halfScaleForKT = 0."); | |
749 | ReadString("BeamRemnants:halfMassForKT = 0."); | |
cc545eb9 | 750 | } |
751 | ||
752 | void AliPythia8::SwitchHFOff() | |
753 | { | |
754 | // Switch off heavy flavor | |
755 | // Maximum number of quark flavours used in pdf | |
756 | ReadString("PDFinProcess:nQuarkIn = 3"); | |
757 | // Maximum number of flavors that can be used in showers | |
758 | ReadString("TimeShower:nGluonToQuark = 3"); | |
759 | ReadString("SpaceShower:nQuarkIn = 3"); | |
760 | ||
761 | ||
762 | } | |
763 | ||
764 | void AliPythia8::SetPycellParameters(Float_t etaMax, Int_t nEta, Int_t nPhi, | |
765 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) | |
766 | { | |
767 | // Set pycell parameters | |
768 | fCellJet = Pythia8::CellJet( etaMax, nEta, nPhi, 2, 0, 0., 0., thresh); | |
769 | fEtSeed = etseed; | |
770 | fMinEtJet = minet; | |
771 | fRJet = r; | |
772 | } | |
773 | ||
774 | void AliPythia8::ModifiedSplitting() | |
775 | { | |
776 | // | |
777 | // We have to see how to implement this in Pythia8 !!! | |
778 | // | |
779 | // Modified splitting probability as a model for quenching | |
780 | // SetPARJ(200, 0.8); | |
781 | // SetMSTJ(41, 1); // QCD radiation only | |
782 | // SetMSTJ(42, 2); // angular ordering | |
783 | // SetMSTJ(44, 2); // option to run alpha_s | |
784 | // SetMSTJ(47, 0); // No correction back to hard scattering element | |
785 | // SetMSTJ(50, 0); // No coherence in first branching | |
786 | // SetPARJ(82, 1.); // Cut off for parton showers | |
787 | } | |
788 | ||
789 | ||
790 | void AliPythia8::InitQuenching(Float_t /*cMin*/, Float_t /*cMax*/, Float_t /*k*/, Int_t /*iECMethod*/, Float_t /*zmax*/, Int_t /*ngmax*/) | |
791 | { | |
792 | // | |
793 | // | |
794 | AliWarning("Not implemented !"); | |
795 | } | |
796 | ||
797 | void AliPythia8::SwitchHadronisationOff() | |
798 | { | |
799 | // Switch off hadronisation | |
800 | ReadString("HadronLevel:Hadronize = off"); | |
801 | } | |
802 | ||
803 | void AliPythia8::SwitchHadronisationOn() | |
804 | { | |
805 | // Switch on hadronisarion | |
806 | ReadString("HadronLevel:Hadronize = on"); | |
807 | } | |
808 | ||
809 | ||
810 | void AliPythia8::GetXandQ(Float_t& x1, Float_t& x2, Float_t& q) | |
811 | { | |
812 | // Get x1, x2 and Q for this event | |
813 | ||
814 | q = Pythia8()->info.QFac(); | |
815 | x1 = Pythia8()->info.x1(); | |
816 | x2 = Pythia8()->info.x2(); | |
817 | ||
818 | } | |
819 | ||
820 | Float_t AliPythia8::GetXSection() | |
821 | { | |
822 | // Get the total cross-section | |
823 | return Pythia8()->info.sigmaGen(); | |
824 | } | |
825 | ||
826 | Float_t AliPythia8::GetPtHard() | |
827 | { | |
828 | // Get the pT hard for this event | |
829 | return Pythia8()->info.pTHat(); | |
830 | } | |
831 | ||
832 | ||
833 | ||
834 | ||
835 | AliPythia8& AliPythia8::operator=(const AliPythia8& rhs) | |
836 | { | |
837 | // Assignment operator | |
838 | rhs.Copy(*this); | |
839 | return *this; | |
840 | } | |
841 | ||
842 | void AliPythia8::Copy(TObject&) const | |
843 | { | |
844 | // | |
845 | // Copy | |
846 | // | |
847 | Fatal("Copy","Not implemented!\n"); | |
848 | } | |
849 | ||
850 | // | |
851 | // To be implemented | |
852 | // | |
853 | void AliPythia8::SetNumberOfParticles(Int_t /*i*/) | |
854 | { | |
855 | AliWarning("Not implemented"); | |
856 | } | |
857 | ||
858 | void AliPythia8::EditEventList(Int_t /*i*/) | |
859 | { | |
860 | AliWarning("Not implemented"); | |
861 | } | |
862 | ||
863 | void AliPythia8::Pyquen(Double_t /*a*/, Int_t /*b*/, Double_t /*c*/) | |
864 | { | |
865 | AliWarning("Cannot be used with Pythia8"); | |
866 | } | |
867 | ||
868 | void AliPythia8::HadronizeEvent() | |
869 | { | |
870 | // Needs access to HadronLevel ? | |
871 | AliWarning("Not yet implemented"); | |
872 | } | |
873 | ||
874 | void AliPythia8::GetQuenchingParameters(Double_t& /*xp*/, Double_t& /*yp*/, Double_t* /*z[4]*/) | |
875 | { | |
876 | AliWarning("Not yet implemented"); | |
877 | } | |
878 | ||
879 | void AliPythia8::LoadEvent(AliStack* /*stack*/, Int_t /*flag*/, Int_t /*reHadr*/) | |
880 | { | |
881 | AliWarning("Not yet implemented"); | |
882 | } |