2 /**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
22 #include "AliPythia8.h"
25 #include "AliPythiaRndm.h"
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
37 // ... as closed gluon loop
41 // Baryon production model
43 // String fragmentation
45 // sea quarks can be used for baryon formation
47 // choice of max. virtuality for ISR
49 // regularisation scheme of ISR
51 // all resonance decays switched on
53 AliPythia8* AliPythia8::fgAliPythia8=NULL;
55 AliPythia8::AliPythia8():
71 // Default Constructor
74 if (!AliPythiaRndm::GetPythiaRandom())
75 AliPythiaRndm::SetPythiaRandom(GetRandom());
78 AliPythia8::AliPythia8(const AliPythia8& pythia):
98 void AliPythia8::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc, Int_t tune)
100 // Initialise the process to generate
101 if (!AliPythiaRndm::GetPythiaRandom())
102 AliPythiaRndm::SetPythiaRandom(GetRandom());
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
119 ReadString("PDF:useLHAPDF = on");
120 ReadString(Form("PDF:LHAPDFset = %s", AliStructFuncType::PDFsetName(fStrucFunc).Data()));
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).
125 // SetMSTU(16,2); // ????
128 // Pythia initialisation for selected processes//
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("MultipartonInteractions:bProfile = 2");
137 ReadString("MultipartonInteractions:coreFraction = 0.5");
138 ReadString("MultipartonInteractions:coreRadius = 0.4");
140 ReadString("MultipartonInteractions:pTmin = 2.0");
141 // Reference energy for pT0 and energy rescaling pace.
142 ReadString("MultipartonInteractions:ecmRef = 1800.");
143 ReadString("MultipartonInteractions:ecmPow = 0.25");
144 // String drawing almost completely minimizes string length.
147 // ISR and FSR activity.
148 // Q^2 scale of the hard scattering
149 ReadString("SigmaProcess:factorMultFac = 4.");
151 // SetPARJ(81, 0.29);
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");
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.
169 // ISR and FSR activity.
170 ReadString("SigmaProcess:factorMultFac = 4.");
175 // Old production mechanism: Old Popcorn
176 ReadString("HardQCD:all = on");
178 // (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon
180 // (D=1)see can be used to form baryons (BARYON JUNCTION)
185 ReadString("HardQCD:gg2ccbar = on");
186 ReadString("HardQCD:qqbar2ccbar = on");
187 // heavy quark masses
188 ReadString("ParticleData:mcRun = 1.2");
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.");
198 ReadString("HardQCD:gg2bbbar = on");
199 ReadString("HardQCD:qqbar2bbbar = on");
200 ReadString("ParticleData:mbRun = 4.75");
204 ReadString("Charmonium:gg2QQbar[3S1(1)]g = on");
207 ReadString("Charmonium:all = on");
209 case kPyCharmUnforced:
211 ReadString("HardQCD:gq2qg = on");
213 ReadString("HardQCD:gg2qq = on");
215 ReadString("HardQCD:gg2gg = on");
217 case kPyBeautyUnforced:
219 ReadString("HardQCD:gq2qg = on");
221 ReadString("HardQCD:gg2qq = on");
223 ReadString("HardQCD:gg2gg = on");
226 // Minimum Bias pp-Collisions
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 if (tune == -1) AtlasTuning();
237 // Minimum Bias pp-Collisions
240 // select Pythia min. bias model
241 ReadString("SoftQCD:minBias = on");
242 ReadString("SoftQCD:singleDiffractive = on");
243 ReadString("SoftQCD:doubleDiffractive = on");
244 ReadString("SoftQCD:doubleDiffractive = on");
245 if (tune > -1) ReadString(Form("Tune:pp = %3d", tune));
248 // Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120
249 // -> Pythia 6.3 or above is needed
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()));
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");
266 // SetPARP(85,0.9); // Regulates gluon prod. mechanism
269 // Minimum Bias pp-Collisions
272 // select Pythia min. bias model
273 ReadString("SoftQCD:minBias = on");
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.");
285 ReadString("ParticleData:mcRun = 1.20");
286 ReadString("ParticleData:mbRun = 4.78");
294 ReadString("HardQCD:all = on");
296 // Pythia Tune A (CDF)
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
311 ReadString("PromptPhoton:all = on");
313 case kPyCharmPbPbMNR:
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.
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.");
332 ReadString("ParticleData:mcRun = 1.20");
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.
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.");
353 ReadString("ParticleData:mcRun = 1.20");
358 case kPyDPlusStrangeppMNR:
359 case kPyLambdacppMNR:
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.
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.");
375 ReadString("ParticleData:mcRun = 1.20");
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)
387 // To get a "perfect" agreement with MNR results, events have to be
388 // generated in four ptHard bins with the following relative
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.");
402 ReadString("ParticleData:mcRun = 1.20");
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.
415 ReadString("SigmaProcess:factorMultFac = 1.");
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.");
423 ReadString("ParticleData:mbRun = 4.75");
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.
435 ReadString("SigmaProcess:factorMultFac = 1.");
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.");
443 ReadString("ParticleData:mbRun = 4.75");
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.
455 ReadString("SigmaProcess:factorMultFac = 1.");
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.");
463 ReadString("ParticleData:mbRun = 4.75");
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)
475 // To get a "perfect" agreement with MNR results, events have to be
476 // generated in four ptHard bins with the following relative
484 ReadString("SigmaProcess:factorMultFac = 1.");
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.");
492 ReadString("ParticleData:mbRun = 4.75");
496 //Inclusive production of 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");
505 //Inclusive production of Z
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");
516 //Inclusive production of 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");
524 case kPyMBRSingleDiffraction:
525 ReadString("Diffraction:PomFlux = 5");
526 ReadString("SoftQCD:singleDiffractive = on");
528 case kPyMBRDoubleDiffraction:
529 ReadString("Diffraction:PomFlux = 5");
530 ReadString("SoftQCD:doubleDiffractive = on");
532 case kPyMBRCentralDiffraction:
533 ReadString("Diffraction:PomFlux = 5");
534 ReadString("SoftQCD:centralDiffractive = on");
536 case kPyMbWithDirectPhoton:
538 case kPyMbAtlasTuneMC09:
543 // SetMSTP(41,1); // all resonance decays switched on
544 Initialize(2212, 2212, fEcms);
547 void AliPythia8::SetNuclei(Int_t /*a1*/, Int_t /*a2*/)
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
564 AliPythia8* AliPythia8::Instance()
566 // Set random number generator
570 fgAliPythia8 = new AliPythia8();
575 void AliPythia8::PrintParticles()
577 // Print list of particl properties
578 ReadString("Main:showAllParticleData");
581 void AliPythia8::ResetDecayTable()
583 // Set default values for pythia decay switches
585 // for (i = 1; i < 501; i++) SetMDCY(i,1,fDefMDCY[i]);
586 // for (i = 1; i < 2001; i++) SetMDME(i,1,fDefMDME[i]);
589 void AliPythia8::SetDecayTable()
591 // Set default values for pythia decay switches
594 // for (i = 1; i < 501; i++) fDefMDCY[i] = GetMDCY(i,1);
595 // for (i = 1; i < 2001; i++) fDefMDME[i] = GetMDME(i,1);
598 void AliPythia8::Pyclus(Int_t& njet)
600 // Call Pythia clustering algorithm
602 Bool_t ok = fClusterJet.analyze(Pythia8()->event, fYScale, fPtScale, fNJetMin, fNJetMax);
604 if (ok) njet = fClusterJet.size();
607 void AliPythia8::Pycell(Int_t& njet)
609 // Call Pythia jet reconstruction algorithm
611 Bool_t ok = fCellJet.analyze(Pythia8()->event, fMinEtJet, fRJet, fEtSeed);
613 if (ok) njet = fCellJet.size();
616 void AliPythia8::GetJet(Int_t i, Float_t& px, Float_t& py, Float_t& pz, Float_t& e)
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));
626 void AliPythia8::GenerateEvent()
628 // Generate one event
629 AliTPythia8::GenerateEvent();
632 void AliPythia8::GenerateMIEvent()
634 // New multiple interaction scenario
635 AliWarning("Not implemented. No event will be generated");
638 void AliPythia8::PrintStatistics()
640 // End of run statistics
641 AliTPythia8::PrintStatistics();
644 void AliPythia8::EventListing()
646 // End of run statistics
647 AliTPythia8::EventListing();
650 Int_t AliPythia8::ProcessCode()
652 // Returns the subprocess code for the current event
653 return Pythia8()->info.code();
656 void AliPythia8::ConfigHeavyFlavor()
659 // Default configuration for Heavy Flavor production
663 ReadString("HardQCD:all = on");
665 // No multiple interactions
666 ReadString("PartonLevel:MI = off");
667 ReadString("MultipleInteractions:pTmin = 0.0");
668 ReadString("MultipleInteractions:pT0Ref = 0.0");
670 // Initial/final parton shower on (Pythia default)
671 ReadString("PartonLevel:ISR = on");
672 ReadString("PartonLevel:FSR = on");
675 ReadString("SigmaProcess:alphaSorder = 2");
678 ReadString("SigmaProcess:renormScale2 = 2");
679 ReadString("SigmaProcess:renormMultFac = 1.");
682 void AliPythia8::AtlasTuning()
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.");
701 void AliPythia8::SetPtHardRange(Float_t ptmin, Float_t ptmax)
703 // Set the pt hard range
704 ReadString(Form("PhaseSpace:pTHatMin = %13.3f", ptmin));
705 ReadString(Form("PhaseSpace:pTHatMax = %13.3f", ptmax));
708 void AliPythia8::SetYHardRange(Float_t /*ymin*/, Float_t /*ymax*/)
710 // Set the y hard range
711 printf("YHardRange not implemented in Pythia8 !!!\n");
716 void AliPythia8::SetFragmentation(Int_t flag)
718 // Switch fragmentation on/off
720 ReadString("HadronLevel:Hadronize = on");
722 ReadString("HadronLevel:Hadronize = off");
726 void AliPythia8::SetInitialAndFinalStateRadiation(Int_t flag1, Int_t flag2)
728 // initial state radiation
730 ReadString("PartonLevel:ISR = on");
732 ReadString("PartonLevel:ISR = off");
734 // final state radiation
736 ReadString("PartonLevel:FSR = on");
738 ReadString("PartonLevel:FSR = off");
742 void AliPythia8::SetIntrinsicKt(Float_t kt)
744 // Set the intrinsic kt
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.");
752 void AliPythia8::SwitchHFOff()
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");
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)
767 // Set pycell parameters
768 fCellJet = Pythia8::CellJet( etaMax, nEta, nPhi, 2, 0, 0., 0., thresh);
774 void AliPythia8::ModifiedSplitting()
777 // We have to see how to implement this in Pythia8 !!!
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
790 void AliPythia8::InitQuenching(Float_t /*cMin*/, Float_t /*cMax*/, Float_t /*k*/, Int_t /*iECMethod*/, Float_t /*zmax*/, Int_t /*ngmax*/)
794 AliWarning("Not implemented !");
797 void AliPythia8::SwitchHadronisationOff()
799 // Switch off hadronisation
800 ReadString("HadronLevel:Hadronize = off");
803 void AliPythia8::SwitchHadronisationOn()
805 // Switch on hadronisarion
806 ReadString("HadronLevel:Hadronize = on");
810 void AliPythia8::GetXandQ(Float_t& x1, Float_t& x2, Float_t& q)
812 // Get x1, x2 and Q for this event
814 q = Pythia8()->info.QFac();
815 x1 = Pythia8()->info.x1();
816 x2 = Pythia8()->info.x2();
820 Float_t AliPythia8::GetXSection()
822 // Get the total cross-section
823 return Pythia8()->info.sigmaGen();
826 Float_t AliPythia8::GetPtHard()
828 // Get the pT hard for this event
829 return Pythia8()->info.pTHat();
835 AliPythia8& AliPythia8::operator=(const AliPythia8& rhs)
837 // Assignment operator
842 void AliPythia8::Copy(TObject&) const
847 Fatal("Copy","Not implemented!\n");
853 void AliPythia8::SetNumberOfParticles(Int_t /*i*/)
855 AliWarning("Not implemented");
858 void AliPythia8::EditEventList(Int_t /*i*/)
860 AliWarning("Not implemented");
863 void AliPythia8::Pyquen(Double_t /*a*/, Int_t /*b*/, Double_t /*c*/)
865 AliWarning("Cannot be used with Pythia8");
868 void AliPythia8::HadronizeEvent()
870 // Needs access to HadronLevel ?
871 AliWarning("Not yet implemented");
874 void AliPythia8::GetQuenchingParameters(Double_t& /*xp*/, Double_t& /*yp*/, Double_t* /*z[4]*/)
876 AliWarning("Not yet implemented");
879 void AliPythia8::LoadEvent(AliStack* /*stack*/, Int_t /*flag*/, Int_t /*reHadr*/)
881 AliWarning("Not yet implemented");