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103ac317 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | // | |
ba762ab4 | 19 | // Class to create the coktail for physics with muons for pp collisions |
20 | // using the The followoing sources: | |
21 | // jpsi, psiP, upsilon, upsilonP, upsilonPP, open charm and open beauty | |
103ac317 | 22 | // The free parameeters are : |
23 | // pp reaction cross-section | |
24 | // production cross-sections in pp collisions | |
b44c3901 | 25 | // July 07:added heavy quark production from AliGenCorrHF and heavy quark |
26 | // production switched off in Pythia | |
f81a4aca | 27 | // Aug. 07: added trigger cut on total momentum |
00e6c5ee | 28 | // 2009: added possibility to hide x-sections (B. Vulpescu) |
29 | // 2009: added possibility to have the cocktail (fast generator and param.) | |
30 | // for pp @ 10 TeV or pp @ 14 TeV (N. Bastid) | |
ba8bf3f5 | 31 | //----------------- |
00e6c5ee | 32 | // 2009: added polarization (L. Bianchi) |
ba8bf3f5 | 33 | //------------------ |
34 | // 11/2009: added chi_c1 & chi_c2 (P.Crochet & N.Bastid). | |
35 | // Cross-sections for charmonia are now directly taken from the Yellow Report | |
36 | // (hep-ph/0311048) Tab.9, page 19. See below for details w.r.t. beam energy. | |
37 | // usage: see example of Config in $ALICE_ROOT/prod/LHC09a10/Config.C | |
ba762ab4 | 38 | //------------------------ |
39 | // 04/2010: | |
40 | // - CMS energy passed via parameter | |
41 | // i.e. gener->SetCMSEnergy(AliGenMUONCocktailpp::kCMS07TeV) in Config.C | |
42 | // - resonances now added to the cocktail via AddReso2Generator | |
43 | // - cleaning | |
7455632e | 44 | // B.Vulpescu & P.Crochet |
45 | //----------------------- | |
46 | // 10/2011: | |
47 | // - added the cocktail for p-Pb & Pb-p @ 8.8 TeV with 4 centrality bins and | |
48 | // for Pb-Pb @ 2.76 TeV with 11 centrality bins. Bins should be defined also | |
49 | // in the Config.C with one AliGenMUONCocktailpp per bin. These generators | |
50 | // included in a AliGenCocktail together with an event generator (e.g. Hijing) | |
51 | // providing the underlying event and collision centrality. The bin number n | |
52 | // passed via AliGenMUONCocktailpp::SetCentralityBin(n). | |
53 | // See details in my presentation at the PWG3-Muon meeting (05.10.2011): | |
54 | // https://indico.cern.ch/conferenceDisplay.py?confId=157367 | |
55 | // - simplifications and bug fix in CreateCocktail() | |
56 | // S. Grigoryan | |
ba762ab4 | 57 | |
103ac317 | 58 | #include <TObjArray.h> |
59 | #include <TParticle.h> | |
60 | #include <TF1.h> | |
aaa95f22 | 61 | #include <TVirtualMC.h> |
103ac317 | 62 | #include "AliGenCocktailEventHeader.h" |
63 | ||
64 | #include "AliGenCocktailEntry.h" | |
65 | #include "AliGenMUONCocktailpp.h" | |
66 | #include "AliGenMUONlib.h" | |
67 | #include "AliGenParam.h" | |
68 | #include "AliMC.h" | |
69 | #include "AliRun.h" | |
70 | #include "AliStack.h" | |
aaa95f22 | 71 | #include "AliDecayer.h" |
103ac317 | 72 | #include "AliLog.h" |
b44c3901 | 73 | #include "AliGenCorrHF.h" |
00e6c5ee | 74 | #include "AliDecayerPolarized.h" |
103ac317 | 75 | |
76 | ClassImp(AliGenMUONCocktailpp) | |
77 | ||
78 | //________________________________________________________________________ | |
79 | AliGenMUONCocktailpp::AliGenMUONCocktailpp() | |
1c56e311 | 80 | :AliGenCocktail(), |
aaa95f22 | 81 | fDecayer(0), |
82 | fDecayModeResonance(kAll), | |
83 | fDecayModePythia(kAll), | |
1c56e311 | 84 | fMuonMultiplicity(0), |
85 | fMuonPtCut(0.), | |
f81a4aca | 86 | fMuonPCut(0.), |
18bc0c8e | 87 | fMuonThetaMinCut(0.), |
f81a4aca | 88 | fMuonThetaMaxCut(180.), |
aaa95f22 | 89 | fMuonOriginCut(-999.), |
18bc0c8e | 90 | fNSucceded(0), |
9ff768ee | 91 | fNGenerated(0), |
7455632e | 92 | fCentralityBin(0), |
00e6c5ee | 93 | |
94 | fJpsiPol(0), | |
ba8bf3f5 | 95 | fChic1Pol(0), |
96 | fChic2Pol(0), | |
00e6c5ee | 97 | fPsiPPol(0), |
98 | fUpsPol(0), | |
99 | fUpsPPol(0), | |
100 | fUpsPPPol(0), | |
101 | fPolFrame(0), | |
102 | ||
ba762ab4 | 103 | fCMSEnergyTeV(0), |
104 | fCMSEnergyTeVArray(), | |
105 | fSigmaReaction(0), | |
106 | fSigmaReactionArray(), | |
107 | fSigmaJPsi(0), | |
108 | fSigmaJPsiArray(), | |
109 | fSigmaChic1(0), | |
110 | fSigmaChic1Array(), | |
111 | fSigmaChic2(0), | |
112 | fSigmaChic2Array(), | |
113 | fSigmaPsiP(0), | |
114 | fSigmaPsiPArray(), | |
115 | fSigmaUpsilon(0), | |
116 | fSigmaUpsilonArray(), | |
117 | fSigmaUpsilonP(0), | |
118 | fSigmaUpsilonPArray(), | |
119 | fSigmaUpsilonPP(0), | |
120 | fSigmaUpsilonPPArray(), | |
121 | fSigmaCCbar(0), | |
122 | fSigmaCCbarArray(), | |
123 | fSigmaBBbar(0), | |
124 | fSigmaBBbarArray(), | |
125 | ||
126 | fSigmaSilent(kFALSE) | |
127 | { | |
128 | // Constructor | |
129 | ||
7455632e | 130 | // x-sections for pp @ 7 TeV: |
131 | // -charmonia: 4pi integral of fit function for inclusive J/psi dsigma/dy LHC data | |
132 | // gives 60 mub; so sigma_prompt = 54 mub, while Ref = R.Vogt_arXiv:1003.3497 (Table 2) | |
133 | // gives 35 mub. Below we use sigma_direct from the Ref scaled by the factor 54/35. | |
134 | // -bottomonia: 4pi integral of fit function for inclusive Upsilon1S dsigma/dy LHC data | |
135 | // gives 0.56 mub, sigmas for 2S & 3S obtained using CMS data for ratios 2S/1S & 3S/1S | |
136 | // -ccbar & bbbar: NLO pQCD computations - http://www-alice.gsi.de/ana/MNR/results.html | |
ba762ab4 | 137 | fCMSEnergyTeVArray[0] = 7.00; |
7455632e | 138 | fSigmaReactionArray[0] = 0.070; |
139 | fSigmaJPsiArray[0] = 33.6e-6; | |
140 | fSigmaChic1Array[0] = 32.6e-6; | |
141 | fSigmaChic2Array[0] = 53.8e-6; | |
142 | fSigmaPsiPArray[0] = 7.6e-6; | |
143 | fSigmaUpsilonArray[0] = 0.56e-6; | |
144 | fSigmaUpsilonPArray[0] = 0.19e-6; | |
145 | fSigmaUpsilonPPArray[0] = 0.09e-6; | |
ba762ab4 | 146 | fSigmaCCbarArray[0] = 6.91e-3; |
147 | fSigmaBBbarArray[0] = 0.232e-3; | |
148 | ||
ba8bf3f5 | 149 | //x-sections for pp @ 10 TeV: charmonia and bottomonia from 14 TeV numbers |
7455632e | 150 | // scaled down according to ccbar and bbbar cross-sections |
ba762ab4 | 151 | fCMSEnergyTeVArray[1] = 10.00; |
7455632e | 152 | fSigmaReactionArray[1] = 0.070; |
ba762ab4 | 153 | fSigmaJPsiArray[1] = 26.06e-6; |
154 | fSigmaChic1Array[1] = 25.18e-6; | |
155 | fSigmaChic2Array[1] = 41.58e-6; | |
156 | fSigmaPsiPArray[1] = 5.88e-6; | |
157 | fSigmaUpsilonArray[1] = 0.658e-6; | |
158 | fSigmaUpsilonPArray[1] = 0.218e-6; | |
159 | fSigmaUpsilonPPArray[1] = 0.122e-6; | |
160 | fSigmaCCbarArray[1] = 8.9e-3; | |
161 | fSigmaBBbarArray[1] = 0.33e-3; | |
7455632e | 162 | |
ba8bf3f5 | 163 | //x-sections for pp @ 14 TeV: charmonia from hep-ph/0311048 Tab.9, page 19, |
7455632e | 164 | // bottomonium from hep-ph/0311048 Tab.9, page 19 taken into account that |
ba8bf3f5 | 165 | // feed-down from chib is included |
ba762ab4 | 166 | fCMSEnergyTeVArray[2] = 14.00; |
167 | fSigmaReactionArray[2] = 0.070; | |
168 | fSigmaJPsiArray[2] = 32.9e-6; | |
169 | fSigmaChic1Array[2] = 31.8e-6; | |
170 | fSigmaChic2Array[2] = 52.5e-6; | |
171 | fSigmaPsiPArray[2] = 7.43e-6; | |
172 | fSigmaUpsilonArray[2] = 0.989e-6; | |
173 | fSigmaUpsilonPArray[2] = 0.502e-6; | |
174 | fSigmaUpsilonPPArray[2] = 0.228e-6; | |
175 | fSigmaCCbarArray[2] = 11.2e-3; | |
7455632e | 176 | fSigmaBBbarArray[2] = 0.445e-3; |
177 | ||
178 | // x-sections for Min. Bias p-Pb & Pb-p @ 8.8 TeV: charmonia and bottomonia | |
179 | // from 7 TeV numbers scaled according to pQCD ccbar and bbbar x-sections | |
180 | // and with Glauber scaling | |
181 | fCMSEnergyTeVArray[3] = 9.00; // for 8.8 TeV | |
182 | fSigmaReactionArray[3] = 2.10; | |
183 | fSigmaJPsiArray[3] = 8.19e-3; // 208*1.172*33.6e-6 | |
184 | fSigmaChic1Array[3] = 7.95e-3; | |
185 | fSigmaChic2Array[3] = 13.1e-3; | |
186 | fSigmaPsiPArray[3] = 1.85e-3; | |
187 | fSigmaUpsilonArray[3] = 0.146e-3; // 208*1.25*0.56e-6 | |
188 | fSigmaUpsilonPArray[3] = 0.049e-3; | |
189 | fSigmaUpsilonPPArray[3] = 0.023e-3; | |
190 | fSigmaCCbarArray[3] = 1.68; // 208*8.1e-3 | |
191 | fSigmaBBbarArray[3] = 0.061; // 208*0.29e-3 | |
192 | ||
193 | fCMSEnergyTeVArray[4] = -fCMSEnergyTeVArray[3]; | |
194 | fSigmaReactionArray[4] = fSigmaReactionArray[3]; | |
195 | fSigmaJPsiArray[4] = fSigmaJPsiArray[3]; | |
196 | fSigmaChic1Array[4] = fSigmaChic1Array[3]; | |
197 | fSigmaChic2Array[4] = fSigmaChic2Array[3]; | |
198 | fSigmaPsiPArray[4] = fSigmaPsiPArray[3]; | |
199 | fSigmaUpsilonArray[4] = fSigmaUpsilonArray[3]; | |
200 | fSigmaUpsilonPArray[4] = fSigmaUpsilonPArray[3]; | |
201 | fSigmaUpsilonPPArray[4] = fSigmaUpsilonPPArray[3]; | |
202 | fSigmaCCbarArray[4] = fSigmaCCbarArray[3]; | |
203 | fSigmaBBbarArray[4] = fSigmaBBbarArray[3]; | |
204 | ||
205 | // x-sections for Min. Bias Pb-Pb @ 2.76 TeV: charmonia and bottomonia | |
206 | // from 7 TeV numbers scaled according to pQCD ccbar and bbbar x-sections | |
207 | // and with Glauber scaling | |
208 | fCMSEnergyTeVArray[5] = 3.00; // for 2.76 TeV | |
209 | fSigmaReactionArray[5] = 7.65; | |
210 | fSigmaJPsiArray[5] = 0.734; // 208*208*0.505*33.6e-6 | |
211 | fSigmaChic1Array[5] = 0.712; | |
212 | fSigmaChic2Array[5] = 1.175; | |
213 | fSigmaPsiPArray[5] = 0.166; | |
214 | fSigmaUpsilonArray[5] = 0.0092; // 208*208*0.379*0.56e-6 | |
215 | fSigmaUpsilonPArray[5] = 0.0031; | |
216 | fSigmaUpsilonPPArray[5] = 0.0015; | |
217 | fSigmaCCbarArray[5] = 151.; // 208*208*3.49e-3 | |
218 | fSigmaBBbarArray[5] = 3.8; // 208*208*0.088e-3 | |
ba762ab4 | 219 | |
103ac317 | 220 | } |
93a2041b | 221 | |
103ac317 | 222 | //_________________________________________________________________________ |
223 | AliGenMUONCocktailpp::~AliGenMUONCocktailpp() | |
ba762ab4 | 224 | { |
103ac317 | 225 | // Destructor |
ba762ab4 | 226 | |
227 | } | |
228 | ||
229 | //_________________________________________________________________________ | |
230 | void AliGenMUONCocktailpp::SetCMSEnergy(CMSEnergyCode cmsEnergy) | |
103ac317 | 231 | { |
ba762ab4 | 232 | // setter for CMSEnergy and corresponding cross-sections |
233 | fCMSEnergyTeV = fCMSEnergyTeVArray[cmsEnergy]; | |
234 | fSigmaReaction = fSigmaReactionArray[cmsEnergy]; | |
235 | fSigmaJPsi = fSigmaJPsiArray[cmsEnergy]; | |
236 | fSigmaChic1 = fSigmaChic1Array[cmsEnergy]; | |
237 | fSigmaChic2 = fSigmaChic2Array[cmsEnergy]; | |
238 | fSigmaPsiP = fSigmaPsiPArray[cmsEnergy]; | |
239 | fSigmaUpsilon = fSigmaUpsilonArray[cmsEnergy]; | |
240 | fSigmaUpsilonP = fSigmaUpsilonPArray[cmsEnergy]; | |
241 | fSigmaUpsilonPP = fSigmaUpsilonPPArray[cmsEnergy]; | |
242 | fSigmaCCbar = fSigmaCCbarArray[cmsEnergy]; | |
243 | fSigmaBBbar = fSigmaBBbarArray[cmsEnergy]; | |
103ac317 | 244 | } |
245 | ||
00e6c5ee | 246 | //_________________________________________________________________________ |
247 | void AliGenMUONCocktailpp::SetResPolarization(Double_t JpsiPol, Double_t PsiPPol, Double_t UpsPol, | |
248 | Double_t UpsPPol, Double_t UpsPPPol, char *PolFrame){ | |
ba762ab4 | 249 | // setter for resonances polarization |
00e6c5ee | 250 | if (strcmp(PolFrame,"kColSop")==0){ |
ba762ab4 | 251 | fJpsiPol = (JpsiPol>=-1 && JpsiPol<=1) ? JpsiPol : 0; |
252 | fPsiPPol = (PsiPPol>=-1 && PsiPPol<=1) ? PsiPPol : 0; | |
253 | fUpsPol = (UpsPol>=-1 && UpsPol<=1) ? UpsPol : 0; | |
254 | fUpsPPol = (UpsPPol>=-1 && UpsPPol<=1) ? UpsPPol : 0; | |
255 | fUpsPPPol = (UpsPPPol>=-1 && UpsPPPol<=1) ? UpsPPPol : 0; | |
256 | fPolFrame = 0; | |
00e6c5ee | 257 | } else if (strcmp(PolFrame,"kHelicity")==0){ |
ba762ab4 | 258 | fJpsiPol = (JpsiPol>=-1 && JpsiPol<=1) ? JpsiPol : 0; |
259 | fPsiPPol = (PsiPPol>=-1 && PsiPPol<=1) ? PsiPPol : 0; | |
260 | fUpsPol = (UpsPol>=-1 && UpsPol<=1) ? UpsPol : 0; | |
261 | fUpsPPol = (UpsPPol>=-1 && UpsPPol<=1) ? UpsPPol : 0; | |
262 | fUpsPPPol = (UpsPPPol>=-1 && UpsPPPol<=1) ? UpsPPPol : 0; | |
263 | fPolFrame = 1; | |
264 | ||
00e6c5ee | 265 | } else { |
266 | AliInfo(Form("The polarization frame is not valid")); | |
267 | AliInfo(Form("No polarization will be set")); | |
268 | fJpsiPol=0.; | |
269 | fPsiPPol=0.; | |
270 | fUpsPol=0.; | |
271 | fUpsPPol=0.; | |
272 | fUpsPPPol=0.; | |
273 | } | |
274 | } | |
275 | ||
103ac317 | 276 | //_________________________________________________________________________ |
8058ead1 | 277 | void AliGenMUONCocktailpp::CreateCocktail() |
103ac317 | 278 | { |
ba762ab4 | 279 | // create and add resonances and open HF to the coctail |
280 | Int_t cmsEnergy = Int_t(fCMSEnergyTeV); | |
281 | ||
103ac317 | 282 | // These limits are only used for renormalization of quarkonia cross section |
283 | // Pythia events are generated in 4pi | |
284 | Double_t ptMin = fPtMin; | |
285 | Double_t ptMax = fPtMax; | |
286 | Double_t yMin = fYMin;; | |
287 | Double_t yMax = fYMax;; | |
288 | Double_t phiMin = fPhiMin*180./TMath::Pi(); | |
289 | Double_t phiMax = fPhiMax*180./TMath::Pi(); | |
290 | AliInfo(Form("Ranges pT:%4.1f : %4.1f GeV/c, y:%4.2f : %4.2f, Phi:%5.1f : %5.1f degres",ptMin,ptMax,yMin,yMax,phiMin,phiMax)); | |
291 | ||
18bc0c8e | 292 | // Cross sections in barns (from PPR Vol. II p: 552) pp - 14 TeV and |
293 | // corrected from feed down of higher resonances | |
103ac317 | 294 | |
9ff768ee | 295 | Double_t sigmajpsi = fSigmaJPsi; |
ba8bf3f5 | 296 | Double_t sigmachic1 = fSigmaChic1; |
297 | Double_t sigmachic2 = fSigmaChic2; | |
9ff768ee | 298 | Double_t sigmapsiP = fSigmaPsiP; |
299 | Double_t sigmaupsilon = fSigmaUpsilon; | |
300 | Double_t sigmaupsilonP = fSigmaUpsilonP; | |
301 | Double_t sigmaupsilonPP = fSigmaUpsilonPP; | |
302 | Double_t sigmaccbar = fSigmaCCbar; | |
303 | Double_t sigmabbbar = fSigmaBBbar; | |
3285b419 | 304 | |
00e6c5ee | 305 | // Cross sections corrected with the BR in mu+mu- |
306 | // (only in case of use of AliDecayerPolarized) | |
307 | ||
ba762ab4 | 308 | if(TMath::Abs(fJpsiPol) > 1.e-30) {sigmajpsi = fSigmaJPsi*0.0593;} |
309 | if(TMath::Abs(fChic1Pol) > 1.e-30) {sigmachic1 = fSigmaChic1*0.;} // tb consistent | |
310 | if(TMath::Abs(fChic2Pol) > 1.e-30) {sigmachic2 = fSigmaChic2*0.;} // tb consistent | |
311 | if(TMath::Abs(fPsiPPol) > 1.e-30) {sigmapsiP = fSigmaPsiP*0.0075;} | |
312 | if(TMath::Abs(fUpsPol) > 1.e-30) {sigmaupsilon = fSigmaUpsilon*0.0248;} | |
313 | if(TMath::Abs(fUpsPPol) > 1.e-30) {sigmaupsilonP = fSigmaUpsilonP*0.0193;} | |
314 | if(TMath::Abs(fUpsPPPol) > 1.e-30) {sigmaupsilonPP = fSigmaUpsilonPP*0.0218;} | |
00e6c5ee | 315 | |
aaa95f22 | 316 | AliInfo(Form("the parametrised resonances uses the decay mode %d",fDecayModeResonance)); |
317 | ||
ba762ab4 | 318 | // Create and add resonances to the generator |
319 | AliGenParam * genjpsi=0; | |
320 | AliGenParam * genchic1=0; | |
321 | AliGenParam * genchic2=0; | |
322 | AliGenParam * genpsiP=0; | |
323 | AliGenParam * genupsilon=0; | |
324 | AliGenParam * genupsilonP=0; | |
325 | AliGenParam * genupsilonPP=0; | |
326 | ||
327 | Char_t nameJpsi[10]; | |
328 | Char_t nameChic1[10]; | |
329 | Char_t nameChic2[10]; | |
330 | Char_t namePsiP[10]; | |
331 | Char_t nameUps[10]; | |
332 | Char_t nameUpsP[10]; | |
333 | Char_t nameUpsPP[10]; | |
334 | ||
c478a271 | 335 | snprintf(nameJpsi,10, "Jpsi"); |
336 | snprintf(nameChic1,10, "Chic1"); | |
337 | snprintf(nameChic2,10, "Chic2"); | |
338 | snprintf(namePsiP,10, "PsiP"); | |
339 | snprintf(nameUps,10, "Ups"); | |
340 | snprintf(nameUpsP,10, "UpsP"); | |
341 | snprintf(nameUpsPP,10, "UpsPP"); | |
ba762ab4 | 342 | |
7455632e | 343 | Char_t tname[40] = ""; |
344 | if(cmsEnergy == 10) {snprintf(tname, 40, "CDF pp 10"); | |
345 | } else if (cmsEnergy == 14){snprintf(tname, 40, "CDF pp"); | |
346 | } else if (cmsEnergy == 7) {snprintf(tname, 40, "pp 7"); | |
347 | // } else if (cmsEnergy == 2) {snprintf(tname, 40, "pp 2.76"); | |
348 | } else if (cmsEnergy == 9) {snprintf(tname, 40, "pPb 8.8"); | |
349 | if (fCentralityBin > 0) snprintf(tname, 40, "pPb 8.8c%d",fCentralityBin); | |
350 | } else if (cmsEnergy == -9){snprintf(tname, 40, "Pbp 8.8"); | |
351 | if (fCentralityBin > 0) snprintf(tname, 40, "Pbp 8.8c%d",fCentralityBin); | |
352 | } else if (cmsEnergy == 3) {snprintf(tname, 40, "PbPb 2.76"); | |
353 | if (fCentralityBin > 0) snprintf(tname, 40, "PbPb 2.76c%d",fCentralityBin); | |
418e091f | 354 | } else { |
7455632e | 355 | AliError("Initialisation failed, wrong cmsEnergy"); |
418e091f | 356 | return; |
00e6c5ee | 357 | } |
7455632e | 358 | genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, tname, "Jpsi"); |
359 | genchic1 = new AliGenParam(1, AliGenMUONlib::kChic1, tname, "Chic1"); | |
360 | genchic2 = new AliGenParam(1, AliGenMUONlib::kChic2, tname, "Chic2"); | |
361 | genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, tname, "PsiP"); | |
362 | genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, tname, "Upsilon"); | |
363 | genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, tname, "UpsilonP"); | |
364 | genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, tname, "UpsilonPP"); | |
365 | ||
366 | // Hard process yield per pA or AA collision for i-th centrality bin is R*r[i]*shad[i] | |
367 | // where R is the ratio of hard and geometrical x-sections, r[i] is the ratio of these | |
368 | // x-section fractions for given centrality and shad[i] is the shadowing factor (in 4pi). | |
369 | // The latter is assumed to be the same for HF-hadrons & quarkonia of the same flavour. | |
370 | Int_t i = 0; | |
371 | Double_t chard[20] = {0}; // charm & beauty shadowing factors are different | |
372 | Double_t bhard[20] = {0}; | |
373 | chard[0] = 1; // 1st element for pp and min. bias (MB) collisions | |
374 | bhard[0] = 1; | |
375 | ||
376 | // 4 centrality bins for p-Pb & Pb-p: 0-20-40-60-100 % | |
377 | if (cmsEnergy == 9 || cmsEnergy == -9) { | |
378 | const Int_t n9 = 5; // 1st element for MB collisions | |
379 | Double_t r9[n9] = {1, 1.936, 1.473, 0.914, 0.333}; // ratio of hard-over-geo fractions | |
380 | Double_t cshad9[n9] = {0.785, 0.715, 0.775, 0.856, 0.951};// EKS98 shadowing factors | |
381 | Double_t bshad9[n9] = {0.889, 0.853, 0.884, 0.926, 0.975}; | |
382 | for(i=0; i<n9; i++) { | |
383 | chard[i] = cshad9[i]*r9[i]; | |
384 | bhard[i] = bshad9[i]*r9[i]; | |
385 | } | |
386 | } | |
387 | ||
388 | // 11 centrality bins for Pb-Pb: 0-5-10-20-30-40-50-60-70-80-90-100 % | |
389 | if (cmsEnergy == 3) { | |
390 | const Int_t n3 = 12; // 1st element for MB collisions | |
391 | Double_t r3[n3] = {1, 4.661, 3.647, 2.551, 1.544, 0.887, 0.474, | |
392 | 0.235, 0.106, 0.044, 0.017, 0.007}; // ratio of hard-over-geo fractions | |
393 | Double_t cshad3[n3] = {0.662, 0.622, 0.631, 0.650, 0.681, 0.718, | |
394 | 0.760, 0.805, 0.849, 0.888, 0.918, 0.944};// EKS98 shadowing factors | |
395 | Double_t bshad3[n3] = {0.874, 0.856, 0.861, 0.869, 0.883, 0.898, | |
396 | 0.915, 0.932, 0.948, 0.962, 0.972, 0.981}; | |
397 | for(i=0; i<n3; i++) { | |
398 | chard[i] = cshad3[i]*r3[i]; | |
399 | bhard[i] = bshad3[i]*r3[i]; | |
400 | } | |
401 | } | |
402 | ||
403 | AddReso2Generator(nameJpsi,genjpsi,chard[fCentralityBin]*sigmajpsi,fJpsiPol); | |
404 | AddReso2Generator(nameChic1,genchic1,chard[fCentralityBin]*sigmachic1,fChic1Pol); | |
405 | AddReso2Generator(nameChic2,genchic2,chard[fCentralityBin]*sigmachic2,fChic2Pol); | |
406 | AddReso2Generator(namePsiP,genpsiP,chard[fCentralityBin]*sigmapsiP,fPsiPPol); | |
00e6c5ee | 407 | |
7455632e | 408 | AddReso2Generator(nameUps,genupsilon,bhard[fCentralityBin]*sigmaupsilon,fUpsPol); |
409 | AddReso2Generator(nameUpsP,genupsilonP,bhard[fCentralityBin]*sigmaupsilonP,fUpsPPol); | |
410 | AddReso2Generator(nameUpsPP,genupsilonPP,bhard[fCentralityBin]*sigmaupsilonPP,fUpsPPPol); | |
b44c3901 | 411 | |
412 | //------------------------------------------------------------------ | |
413 | // Generator of charm | |
ba762ab4 | 414 | AliGenCorrHF *gencharm = new AliGenCorrHF(1, 4, cmsEnergy); |
8058ead1 | 415 | gencharm->SetMomentumRange(0,9999); |
416 | gencharm->SetForceDecay(kAll); | |
7455632e | 417 | Double_t ratioccbar = chard[fCentralityBin]*sigmaccbar/fSigmaReaction; |
ba762ab4 | 418 | if (!gMC) gencharm->SetDecayer(fDecayer); |
8058ead1 | 419 | gencharm->Init(); |
9ff768ee | 420 | if (!fSigmaSilent) { |
00e6c5ee | 421 | AliInfo(Form("c-cbar prod. cross-section in pp %5.3g b",sigmaccbar)); |
3285b419 | 422 | AliInfo(Form("c-cbar prod. probability per collision in acceptance %5.3g",ratioccbar)); |
423 | } | |
8058ead1 | 424 | AddGenerator(gencharm,"CorrHFCharm",ratioccbar); |
103ac317 | 425 | //------------------------------------------------------------------ |
b44c3901 | 426 | // Generator of beauty |
ba762ab4 | 427 | AliGenCorrHF *genbeauty = new AliGenCorrHF(1, 5, cmsEnergy); |
8058ead1 | 428 | genbeauty->SetMomentumRange(0,9999); |
429 | genbeauty->SetForceDecay(kAll); | |
7455632e | 430 | Double_t ratiobbbar = bhard[fCentralityBin]*sigmabbbar/fSigmaReaction; |
ba762ab4 | 431 | if (!gMC) genbeauty->SetDecayer(fDecayer); |
8058ead1 | 432 | genbeauty->Init(); |
9ff768ee | 433 | if (!fSigmaSilent) { |
00e6c5ee | 434 | AliInfo(Form("b-bbar prod. cross-section in pp %5.3g b",sigmabbbar)); |
3285b419 | 435 | AliInfo(Form("b-bbar prod. probability per collision in acceptance %5.3g",ratiobbbar)); |
436 | } | |
ba762ab4 | 437 | AddGenerator(genbeauty,"CorrHFBeauty",ratiobbbar); |
b44c3901 | 438 | |
8058ead1 | 439 | //------------------------------------------------------------------- |
103ac317 | 440 | // Pythia generator |
8058ead1 | 441 | // |
442 | // This has to go into the Config.C | |
443 | // | |
444 | // AliGenPythia *pythia = new AliGenPythia(1); | |
445 | // pythia->SetProcess(kPyMbMSEL1); | |
446 | // pythia->SetStrucFunc(kCTEQ5L); | |
447 | // pythia->SetEnergyCMS(14000.); | |
448 | // AliInfo(Form("\n\npythia uses the decay mode %d", GetDecayModePythia())); | |
449 | // Decay_t dt = gener->GetDecayModePythia(); | |
450 | // pythia->SetForceDecay(dt); | |
451 | // pythia->SetPtRange(0.,100.); | |
452 | // pythia->SetYRange(-8.,8.); | |
453 | // pythia->SetPhiRange(0.,360.); | |
454 | // pythia->SetPtHard(2.76,-1.0); | |
455 | // pythia->SwitchHFOff(); | |
456 | // pythia->Init(); | |
457 | // AddGenerator(pythia,"Pythia",1); | |
ba8bf3f5 | 458 | |
8058ead1 | 459 | } |
103ac317 | 460 | |
ba762ab4 | 461 | //------------------------------------------------------------------- |
462 | void AliGenMUONCocktailpp::AddReso2Generator(Char_t* nameReso, | |
463 | AliGenParam* const genReso, | |
464 | Double_t sigmaReso, | |
465 | Double_t polReso) | |
466 | { | |
467 | // add resonances to the cocktail | |
468 | Double_t phiMin = fPhiMin*180./TMath::Pi(); | |
469 | Double_t phiMax = fPhiMax*180./TMath::Pi(); | |
470 | ||
471 | // first step: generation in 4pi | |
472 | genReso->SetPtRange(0.,100.); | |
473 | genReso->SetYRange(-8.,8.); | |
474 | genReso->SetPhiRange(0.,360.); | |
475 | genReso->SetForceDecay(fDecayModeResonance); | |
476 | if (!gMC) genReso->SetDecayer(fDecayer); | |
477 | genReso->Init(); // generation in 4pi | |
478 | // Ratios with respect to the reaction cross-section in the | |
479 | // kinematics limit of the MUONCocktail | |
480 | Double_t ratioReso = sigmaReso / fSigmaReaction * genReso->GetRelativeArea(fPtMin,fPtMax,fYMin,fYMax,phiMin,phiMax); | |
481 | if (!fSigmaSilent) { | |
482 | AliInfo(Form("%s prod. cross-section in pp %5.3g b",nameReso,sigmaReso)); | |
483 | AliInfo(Form("%s prod. probability per collision in acceptance %5.3g",nameReso,ratioReso)); | |
484 | } | |
485 | // second step: generation in selected kinematical range | |
486 | genReso->SetPtRange(fPtMin, fPtMax); | |
487 | genReso->SetYRange(fYMin, fYMax); | |
488 | genReso->SetPhiRange(phiMin, phiMax); | |
489 | genReso->Init(); // generation in selected kinematical range | |
490 | ||
491 | TVirtualMCDecayer *decReso = 0; | |
492 | if(TMath::Abs(polReso) > 1.e-30){ | |
493 | AliInfo(Form("******Setting polarized decayer for %s''",nameReso)); | |
494 | if(fPolFrame==0) { | |
495 | decReso = new AliDecayerPolarized(polReso,AliDecayerPolarized::kColSop,AliDecayerPolarized::kMuon); | |
496 | AliInfo(Form("******Reference frame: %s, alpha: %f","Collins-Soper",polReso)); | |
497 | } | |
498 | if(fPolFrame==1) { | |
499 | decReso = new AliDecayerPolarized(polReso,AliDecayerPolarized::kHelicity,AliDecayerPolarized::kMuon); | |
500 | AliInfo(Form("******Reference frame: %s, alpha: %f","Helicity",polReso)); | |
501 | } | |
418e091f | 502 | if (decReso) { |
503 | decReso->SetForceDecay(kAll); | |
504 | decReso->Init(); | |
505 | genReso->SetDecayer(decReso); | |
506 | } | |
ba762ab4 | 507 | } |
508 | ||
509 | AddGenerator(genReso,nameReso,ratioReso); // Adding Generator | |
510 | } | |
511 | ||
512 | //------------------------------------------------------------------- | |
8058ead1 | 513 | void AliGenMUONCocktailpp::Init() |
514 | { | |
8058ead1 | 515 | // Initialisation |
aaa95f22 | 516 | TIter next(fEntries); |
517 | AliGenCocktailEntry *entry; | |
518 | if (fStack) { | |
519 | while((entry = (AliGenCocktailEntry*)next())) { | |
520 | entry->Generator()->SetStack(fStack); | |
521 | } | |
522 | } | |
103ac317 | 523 | } |
524 | ||
525 | //_________________________________________________________________________ | |
526 | void AliGenMUONCocktailpp::Generate() | |
527 | { | |
528 | // Generate event | |
529 | TIter next(fEntries); | |
530 | AliGenCocktailEntry *entry = 0; | |
531 | AliGenCocktailEntry *preventry = 0; | |
532 | AliGenerator* gen = 0; | |
533 | ||
01c89ce1 | 534 | if (fHeader) delete fHeader; |
535 | fHeader = new AliGenCocktailEventHeader("MUON Cocktail Header"); | |
536 | ||
d94af0c1 | 537 | const TObjArray *partArray = gAlice->GetMCApp()->Particles(); |
103ac317 | 538 | |
539 | // Generate the vertex position used by all generators | |
540 | if(fVertexSmear == kPerEvent) Vertex(); | |
541 | ||
542 | // Loop on primordialTrigger: | |
543 | // minimum muon multiplicity above a pt cut in a theta acceptance region | |
544 | ||
545 | Bool_t primordialTrigger = kFALSE; | |
546 | while(!primordialTrigger) { | |
547 | //Reseting stack | |
33c3c91a | 548 | AliRunLoader * runloader = AliRunLoader::Instance(); |
103ac317 | 549 | if (runloader) |
550 | if (runloader->Stack()) | |
34da8494 | 551 | runloader->Stack()->Clean(); |
103ac317 | 552 | // Loop over generators and generate events |
553 | Int_t igen = 0; | |
554 | Int_t npart = 0; | |
555 | const char* genName = 0; | |
556 | while((entry = (AliGenCocktailEntry*)next())) { | |
557 | gen = entry->Generator(); | |
558 | genName = entry->GetName(); | |
559 | gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2)); | |
21391258 | 560 | gen->SetTime(fTime); |
103ac317 | 561 | |
562 | npart = (strcmp(genName,"Pythia") == 0) ? 1 : | |
563 | gRandom->Poisson(entry->Rate()); | |
564 | ||
565 | if (npart > 0) { | |
566 | igen++; | |
567 | if (igen == 1) entry->SetFirst(0); | |
568 | else entry->SetFirst((partArray->GetEntriesFast())+1); | |
569 | ||
570 | gen->SetNumberParticles(npart); | |
571 | gen->Generate(); | |
572 | entry->SetLast(partArray->GetEntriesFast()); | |
573 | preventry = entry; | |
574 | } | |
575 | } | |
576 | next.Reset(); | |
577 | ||
ba762ab4 | 578 | |
103ac317 | 579 | // Testing primordial trigger: Single muons or dimuons with Pt above a Pt cut |
580 | // in the muon spectrometer acceptance | |
581 | Int_t iPart; | |
582 | fNGenerated++; | |
b44c3901 | 583 | Int_t numberOfMuons=0;Int_t maxPart = partArray->GetEntriesFast(); |
aaa95f22 | 584 | for(iPart=0; iPart<maxPart; iPart++){ |
103ac317 | 585 | |
aaa95f22 | 586 | TParticle *part = gAlice->GetMCApp()->Particle(iPart); |
587 | if ( TMath::Abs(part->GetPdgCode()) == 13 ){ | |
588 | if((part->Vz() > fMuonOriginCut) && //take only the muons that decayed before the abs + 1 int. length in C abs | |
589 | (part->Theta()*180./TMath::Pi()>fMuonThetaMinCut) && | |
590 | (part->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) && | |
f81a4aca | 591 | (part->Pt()>fMuonPtCut) && |
592 | (part->P()>fMuonPCut)) { | |
aaa95f22 | 593 | numberOfMuons++; |
103ac317 | 594 | } |
aaa95f22 | 595 | } |
596 | } | |
01c89ce1 | 597 | if (numberOfMuons >= fMuonMultiplicity) { |
598 | primordialTrigger = kTRUE; | |
599 | fHeader->SetNProduced(maxPart); | |
600 | } | |
601 | ||
103ac317 | 602 | } |
603 | fNSucceded++; | |
604 | ||
01c89ce1 | 605 | TArrayF eventVertex; |
606 | eventVertex.Set(3); | |
607 | for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j]; | |
608 | ||
609 | fHeader->SetPrimaryVertex(eventVertex); | |
21391258 | 610 | fHeader->SetInteractionTime(fTime); |
01c89ce1 | 611 | |
612 | gAlice->SetGenEventHeader(fHeader); | |
613 | ||
aaa95f22 | 614 | // AliInfo(Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded)); |
103ac317 | 615 | AliDebug(5,Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded)); |
616 | } | |
617 | ||
618 |