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4c039060 | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
4c039060 | 17 | |
53904666 | 18 | // Library class for particle pt and y distributions used for |
19 | // muon spectrometer simulations. | |
20 | // To be used with AliGenParam. | |
21 | // The following particle typed can be simulated: | |
22 | // pi, K, phi, omega, eta, J/Psi, Upsilon, charm and beauty mesons. | |
23 | // | |
24 | // andreas.morsch@cern.ch | |
25 | // | |
26 | ||
65fb704d | 27 | #include "TMath.h" |
28 | #include "TRandom.h" | |
f9a1ce31 | 29 | #include "TDatabasePDG.h" |
65fb704d | 30 | |
fe4da5cc | 31 | #include "AliGenMUONlib.h" |
5c3fd7ea | 32 | |
fe4da5cc | 33 | ClassImp(AliGenMUONlib) |
34 | // | |
35 | // Pions | |
75e0cc59 | 36 | Double_t AliGenMUONlib::PtPion(const Double_t *px, const Double_t* /*dummy*/) |
fe4da5cc | 37 | { |
38 | // | |
39 | // PT-PARAMETERIZATION CDF, PRL 61(88) 1819 | |
40 | // POWER LAW FOR PT > 500 MEV | |
41 | // MT SCALING BELOW (T=160 MEV) | |
42 | // | |
d90f80fd | 43 | const Double_t kp0 = 1.3; |
44 | const Double_t kxn = 8.28; | |
45 | const Double_t kxlim=0.5; | |
46 | const Double_t kt=0.160; | |
47 | const Double_t kxmpi=0.139; | |
48 | const Double_t kb=1.; | |
fe4da5cc | 49 | Double_t y, y1, xmpi2, ynorm, a; |
50 | Double_t x=*px; | |
51 | // | |
d90f80fd | 52 | y1=TMath::Power(kp0/(kp0+kxlim),kxn); |
53 | xmpi2=kxmpi*kxmpi; | |
54 | ynorm=kb*(TMath::Exp(-sqrt(kxlim*kxlim+xmpi2)/kt)); | |
fe4da5cc | 55 | a=ynorm/y1; |
d90f80fd | 56 | if (x > kxlim) |
57 | y=a*TMath::Power(kp0/(kp0+x),kxn); | |
fe4da5cc | 58 | else |
d90f80fd | 59 | y=kb*TMath::Exp(-sqrt(x*x+xmpi2)/kt); |
fe4da5cc | 60 | return y*x; |
61 | } | |
753690b0 | 62 | // |
63 | // y-distribution | |
64 | // | |
75e0cc59 | 65 | Double_t AliGenMUONlib::YPion( const Double_t *py, const Double_t */*dummy*/) |
753690b0 | 66 | { |
d90f80fd | 67 | // Pion y |
2280e6af | 68 | Double_t y=TMath::Abs(*py); |
69 | /* | |
d90f80fd | 70 | const Double_t ka = 7000.; |
71 | const Double_t kdy = 4.; | |
d90f80fd | 72 | Double_t ex = y*y/(2*kdy*kdy); |
73 | return ka*TMath::Exp(-ex); | |
2280e6af | 74 | */ |
75 | return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; | |
76 | ||
753690b0 | 77 | } |
78 | // particle composition | |
79 | // | |
65fb704d | 80 | Int_t AliGenMUONlib::IpPion(TRandom *ran) |
753690b0 | 81 | { |
d90f80fd | 82 | // Pion composition |
65fb704d | 83 | if (ran->Rndm() < 0.5) { |
753690b0 | 84 | return 211; |
85 | } else { | |
86 | return -211; | |
87 | } | |
88 | } | |
fe4da5cc | 89 | |
90 | //____________________________________________________________ | |
91 | // | |
92 | // Mt-scaling | |
93 | ||
94 | Double_t AliGenMUONlib::PtScal(Double_t pt, Int_t np) | |
95 | { | |
96 | // SCALING EN MASSE PAR RAPPORT A PTPI | |
97 | // MASS PI,K,ETA,RHO,OMEGA,ETA',PHI | |
d90f80fd | 98 | const Double_t khm[10] = {.13957,.493,.5488,.769,.7826,.958,1.02,0,0,0}; |
fe4da5cc | 99 | // VALUE MESON/PI AT 5 GEV |
d90f80fd | 100 | const Double_t kfmax[10]={1.,0.3,0.55,1.0,1.0,1.0,1.0,0,0,0}; |
a4f206bf | 101 | np--; |
d90f80fd | 102 | Double_t f5=TMath::Power(((sqrt(100.018215)+2.)/(sqrt(100.+khm[np]*khm[np])+2.0)),12.3); |
103 | Double_t fmax2=f5/kfmax[np]; | |
fe4da5cc | 104 | // PIONS |
105 | Double_t ptpion=100.*PtPion(&pt, (Double_t*) 0); | |
106 | Double_t fmtscal=TMath::Power(((sqrt(pt*pt+0.018215)+2.)/ | |
d90f80fd | 107 | (sqrt(pt*pt+khm[np]*khm[np])+2.0)),12.3)/ fmax2; |
fe4da5cc | 108 | return fmtscal*ptpion; |
109 | } | |
110 | // | |
753690b0 | 111 | // kaon |
112 | // | |
113 | // pt-distribution | |
114 | //____________________________________________________________ | |
75e0cc59 | 115 | Double_t AliGenMUONlib::PtKaon( const Double_t *px, const Double_t */*dummy*/) |
753690b0 | 116 | { |
d90f80fd | 117 | // Kaon pT |
a4f206bf | 118 | return PtScal(*px,2); |
753690b0 | 119 | } |
120 | ||
121 | // y-distribution | |
fe4da5cc | 122 | //____________________________________________________________ |
75e0cc59 | 123 | Double_t AliGenMUONlib::YKaon( const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 124 | { |
d90f80fd | 125 | // Kaon y |
2280e6af | 126 | Double_t y=TMath::Abs(*py); |
127 | /* | |
d90f80fd | 128 | const Double_t ka = 1000.; |
129 | const Double_t kdy = 4.; | |
fe4da5cc | 130 | // |
d90f80fd | 131 | Double_t ex = y*y/(2*kdy*kdy); |
132 | return ka*TMath::Exp(-ex); | |
2280e6af | 133 | */ |
134 | ||
135 | return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; | |
753690b0 | 136 | } |
137 | ||
138 | // particle composition | |
139 | // | |
65fb704d | 140 | Int_t AliGenMUONlib::IpKaon(TRandom *ran) |
753690b0 | 141 | { |
d90f80fd | 142 | // Kaon composition |
65fb704d | 143 | if (ran->Rndm() < 0.5) { |
753690b0 | 144 | return 321; |
145 | } else { | |
146 | return -321; | |
147 | } | |
fe4da5cc | 148 | } |
753690b0 | 149 | |
fe4da5cc | 150 | // J/Psi |
151 | // | |
152 | // | |
153 | // pt-distribution | |
154 | //____________________________________________________________ | |
a4f206bf | 155 | Double_t AliGenMUONlib::PtJpsiPP7000( const Double_t *px, const Double_t */*dummy*/) |
156 | { | |
157 | // J/Psi pT | |
158 | // | |
159 | // pp 7 TeV | |
160 | // using ALICE data at 2.5<y<4, see arXiv:1103.2394 | |
161 | ||
162 | const Double_t kpt0 = 2.44; | |
163 | const Double_t kxn = 3.9; | |
164 | Double_t x=*px; | |
165 | // | |
166 | Double_t pass1 = 1.+0.36*(x/kpt0)*(x/kpt0); | |
167 | return x/TMath::Power(pass1,kxn); | |
168 | } | |
169 | ||
170 | Double_t AliGenMUONlib::PtJpsiPP2760( const Double_t *px, const Double_t */*dummy*/) | |
171 | { | |
172 | // J/Psi pT | |
173 | // | |
174 | // pp 2.76 TeV | |
175 | // from the fit of RHIC + LHC data, see arXiv:1103.2394 | |
176 | ||
177 | const Double_t kpt0 = 2.31; | |
178 | const Double_t kxn = 3.9; | |
179 | Double_t x=*px; | |
180 | // | |
181 | Double_t pass1 = 1.+0.36*(x/kpt0)*(x/kpt0); | |
182 | return x/TMath::Power(pass1,kxn); | |
183 | } | |
184 | ||
185 | Double_t AliGenMUONlib::PtJpsiPbPb2760( const Double_t *px, const Double_t *dummy) | |
186 | { | |
187 | // J/Psi pT | |
188 | // | |
189 | // PbPb 2.76 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
190 | // | |
191 | Double_t c[5] = {6.01022e-01, 4.70988e-02, -2.27917e-03, 3.09885e-05, 1.31955e-06}; | |
192 | Double_t x=*px; | |
193 | Double_t y; | |
194 | Int_t j; | |
195 | y = c[j = 4]; | |
196 | while (j > 0) y = y * x + c[--j]; | |
197 | // | |
198 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
199 | return y/d * AliGenMUONlib::PtJpsiPP2760(px,dummy); | |
200 | } | |
201 | ||
75e0cc59 | 202 | Double_t AliGenMUONlib::PtJpsi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 203 | { |
d90f80fd | 204 | // J/Psi pT |
205 | const Double_t kpt0 = 4.; | |
206 | const Double_t kxn = 3.6; | |
fe4da5cc | 207 | Double_t x=*px; |
208 | // | |
d90f80fd | 209 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
210 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 211 | } |
05932df6 | 212 | |
75e0cc59 | 213 | Double_t AliGenMUONlib::PtJpsiCDFscaled( const Double_t *px, const Double_t */*dummy*/) |
0e137c25 | 214 | { |
215 | // J/Psi pT | |
9e9ae065 | 216 | // |
217 | // PbPb 5.5 TeV | |
218 | // scaled from CDF data at 2 TeV | |
219 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
220 | ||
221 | const Double_t kpt0 = 5.100; | |
222 | const Double_t kxn = 4.102; | |
223 | Double_t x=*px; | |
224 | // | |
225 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
226 | return x/TMath::Power(pass1,kxn); | |
227 | } | |
228 | ||
75e0cc59 | 229 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP( const Double_t *px, const Double_t */*dummy*/) |
9ff13849 | 230 | { |
231 | // J/Psi pT | |
232 | // | |
233 | // pp 14 TeV | |
9ff13849 | 234 | // scaled from CDF data at 2 TeV |
235 | ||
9e9ae065 | 236 | const Double_t kpt0 = 5.630; |
237 | const Double_t kxn = 4.071; | |
238 | Double_t x=*px; | |
239 | // | |
240 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
241 | return x/TMath::Power(pass1,kxn); | |
242 | } | |
243 | ||
75e0cc59 | 244 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 245 | { |
246 | // J/Psi pT | |
247 | // | |
248 | // pp 10 TeV | |
249 | // scaled from CDF data at 2 TeV | |
250 | ||
251 | const Double_t kpt0 = 5.334; | |
252 | const Double_t kxn = 4.071; | |
253 | Double_t x=*px; | |
254 | // | |
255 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
256 | return x/TMath::Power(pass1,kxn); | |
257 | } | |
258 | ||
9fd56238 | 259 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
260 | { | |
261 | // J/Psi pT | |
262 | // | |
263 | // pp 8.8 TeV | |
264 | // scaled from CDF data at 2 TeV | |
265 | // | |
266 | const Double_t kpt0 = 5.245; | |
267 | const Double_t kxn = 4.071; | |
268 | Double_t x=*px; | |
269 | // | |
270 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
271 | return x/TMath::Power(pass1,kxn); | |
272 | } | |
273 | ||
274 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
275 | { | |
276 | // J/Psi pT | |
277 | // | |
278 | // pp 7 TeV | |
279 | // scaled from CDF data at 2 TeV | |
280 | ||
281 | const Double_t kpt0 = 5.072; | |
282 | const Double_t kxn = 4.071; | |
283 | Double_t x=*px; | |
284 | // | |
285 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
286 | return x/TMath::Power(pass1,kxn); | |
287 | } | |
288 | ||
289 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
290 | { | |
291 | // J/Psi pT | |
292 | // | |
293 | // pp 3.94 TeV | |
294 | // scaled from CDF data at 2 TeV | |
295 | // | |
296 | const Double_t kpt0 = 4.647; | |
297 | const Double_t kxn = 4.071; | |
298 | Double_t x=*px; | |
299 | // | |
300 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
301 | return x/TMath::Power(pass1,kxn); | |
302 | } | |
303 | ||
a4f206bf | 304 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP3( const Double_t *px, const Double_t */*dummy*/) |
305 | { | |
306 | // J/Psi pT | |
307 | // | |
308 | // pp 2.76 TeV | |
309 | // scaled from CDF data at 1.9 TeV | |
310 | // | |
311 | const Double_t kpt0 = 4.435; | |
312 | const Double_t kxn = 4.071; | |
313 | Double_t x=*px; | |
314 | // | |
315 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
316 | return x/TMath::Power(pass1,kxn); | |
317 | } | |
318 | ||
319 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP2( const Double_t *px, const Double_t */*dummy*/) | |
320 | { | |
321 | // J/Psi pT | |
322 | // | |
323 | // pp 1.9 TeV | |
324 | // fit of the CDF data at 1.9 TeV | |
325 | // | |
326 | const Double_t kpt0 = 4.233; | |
327 | const Double_t kxn = 4.071; | |
328 | Double_t x=*px; | |
329 | // | |
330 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
331 | return x/TMath::Power(pass1,kxn); | |
332 | } | |
333 | ||
9fd56238 | 334 | Double_t AliGenMUONlib::PtJpsiCDFscaledPPb9( const Double_t *px, const Double_t *dummy) |
335 | { | |
336 | // J/Psi pT | |
337 | // | |
338 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
339 | // | |
340 | Double_t c[5] = {6.42774e-01, 1.86168e-02, -6.77296e-04, 8.93512e-06, 1.31586e-07}; | |
341 | Double_t x=*px; | |
342 | Double_t y; | |
343 | Int_t j; | |
344 | y = c[j = 4]; | |
345 | while (j > 0) y = y * x + c[--j]; | |
346 | // | |
347 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
348 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); | |
349 | } | |
350 | ||
351 | Double_t AliGenMUONlib::PtJpsiCDFscaledPbP9( const Double_t *px, const Double_t *dummy) | |
352 | { | |
353 | // J/Psi pT | |
354 | // | |
355 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
356 | // | |
357 | Double_t c[5] = {8.58557e-01, 5.39791e-02, -4.75180e-03, 2.49463e-04, 5.52396e-05}; | |
358 | Double_t x=*px; | |
359 | Double_t y; | |
360 | Int_t j; | |
361 | y = c[j = 4]; | |
362 | while (j > 0) y = y * x + c[--j]; | |
363 | // | |
364 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
365 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); | |
366 | } | |
367 | ||
368 | Double_t AliGenMUONlib::PtJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
369 | { | |
370 | // J/Psi pT | |
371 | // | |
372 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
373 | // | |
374 | Double_t c[5] = {6.01022e-01, 4.70988e-02, -2.27917e-03, 3.09885e-05, 1.31955e-06}; | |
375 | Double_t x=*px; | |
376 | Double_t y; | |
377 | Int_t j; | |
378 | y = c[j = 4]; | |
379 | while (j > 0) y = y * x + c[--j]; | |
380 | // | |
381 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
382 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP4(px,dummy); | |
383 | } | |
384 | ||
75e0cc59 | 385 | Double_t AliGenMUONlib::PtJpsiFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 386 | { |
387 | return 1.; | |
388 | } | |
389 | ||
75e0cc59 | 390 | Double_t AliGenMUONlib::PtJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 391 | { |
1af7144e | 392 | // J/Psi pT spectrum |
05932df6 | 393 | // |
394 | // R. Vogt 2002 | |
395 | // PbPb 5.5 TeV | |
396 | // MRST HO | |
397 | // mc = 1.4 GeV, pt-kick 1 GeV | |
398 | // | |
1af7144e | 399 | Float_t x = px[0]; |
400 | Float_t c[8] = { | |
401 | -2.13098e+00, 9.46552e+00, -5.06799e+00, 1.27260e+00, | |
402 | -1.83806e-01, 1.55853e-02, -7.23241e-04, 1.42105e-05 | |
05932df6 | 403 | }; |
1af7144e | 404 | |
3d905dd7 | 405 | Double_t y; |
36349df1 | 406 | if (x < 10.) { |
3d905dd7 | 407 | Int_t j; |
408 | y = c[j = 7]; | |
409 | while (j > 0) y = y * x +c[--j]; | |
410 | y = x * TMath::Exp(y); | |
411 | } else { | |
412 | y = 0.; | |
413 | } | |
1af7144e | 414 | return y; |
05932df6 | 415 | } |
17d28ba5 | 416 | |
75e0cc59 | 417 | Double_t AliGenMUONlib::PtJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 418 | { |
419 | // J/Psi pT spectrum | |
420 | // B -> J/Psi X | |
421 | Double_t x0 = 4.0384; | |
422 | Double_t n = 3.0288; | |
423 | ||
424 | Double_t x = px[0]; | |
425 | Double_t y = x / TMath::Power((1. + (x/x0)*(x/x0)), n); | |
426 | ||
427 | return y; | |
428 | } | |
429 | ||
430 | ||
75e0cc59 | 431 | Double_t AliGenMUONlib::PtJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 432 | { |
433 | // J/Psi pT spectrum | |
434 | // | |
435 | // R. Vogt 2002 | |
436 | // pp 14 TeV | |
437 | // MRST HO | |
438 | // mc = 1.4 GeV, pt-kick 1 GeV | |
439 | // | |
440 | Float_t x = px[0]; | |
441 | Float_t c[4] = {8.47471e+00, -1.93567e+00, 1.50271e-01, -5.51212e-03}; | |
442 | ||
443 | Double_t y; | |
444 | if (x < 10.) { | |
445 | Int_t j; | |
446 | y = c[j = 3]; | |
447 | while (j > 0) y = y * x +c[--j]; | |
448 | y = x * TMath::Exp(y); | |
449 | } else { | |
450 | y = 0.; | |
451 | } | |
452 | return y; | |
453 | } | |
454 | ||
fe4da5cc | 455 | // |
456 | // y-distribution | |
457 | //____________________________________________________________ | |
a4f206bf | 458 | Double_t AliGenMUONlib::YJpsiPP7000( const Double_t *px, const Double_t */*dummy*/) |
459 | { | |
460 | // J/Psi y | |
461 | // | |
462 | // pp 7 TeV | |
463 | // from the fit of RHIC + LHC data, see arXiv:1103.2394 | |
464 | // | |
465 | Double_t x = px[0]/7.72; | |
466 | x = x*x; | |
467 | Double_t y = TMath::Exp(-x/0.383/0.383/2); | |
468 | if(x > 1) y=0; | |
469 | return y; | |
470 | } | |
471 | ||
472 | Double_t AliGenMUONlib::YJpsiPP2760( const Double_t *px, const Double_t */*dummy*/) | |
473 | { | |
474 | // J/Psi y | |
475 | // | |
476 | // pp 2.76 TeV | |
477 | // from the fit of RHIC + LHC data, see arXiv:1103.2394 | |
478 | // | |
479 | Double_t x = px[0]/6.79; | |
480 | x = x*x; | |
481 | Double_t y = TMath::Exp(-x/0.383/0.383/2); | |
482 | if(x > 1) y=0; | |
483 | return y; | |
484 | } | |
485 | ||
486 | Double_t AliGenMUONlib::YJpsiPbPb2760( const Double_t *px, const Double_t *dummy) | |
487 | { | |
488 | // J/Psi y | |
489 | // | |
490 | // PbPb 2.76 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
491 | // | |
492 | Double_t c[4] = {5.95228e-01, 9.45069e-03, 2.44710e-04, -1.32894e-05}; | |
493 | Double_t x = px[0]*px[0]; | |
494 | Double_t y; | |
495 | Int_t j; | |
496 | y = c[j = 3]; | |
497 | while (j > 0) y = y * x + c[--j]; | |
498 | if(y<0) y=0; | |
499 | ||
500 | return y * AliGenMUONlib::YJpsiPP2760(px,dummy); | |
501 | } | |
502 | ||
75e0cc59 | 503 | Double_t AliGenMUONlib::YJpsi(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 504 | { |
d90f80fd | 505 | // J/psi y |
506 | const Double_t ky0 = 4.; | |
507 | const Double_t kb=1.; | |
fe4da5cc | 508 | Double_t yj; |
509 | Double_t y=TMath::Abs(*py); | |
510 | // | |
d90f80fd | 511 | if (y < ky0) |
512 | yj=kb; | |
fe4da5cc | 513 | else |
d90f80fd | 514 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 515 | return yj; |
516 | } | |
05932df6 | 517 | |
75e0cc59 | 518 | Double_t AliGenMUONlib::YJpsiFlat( const Double_t */*py*/, const Double_t */*dummy*/ ) |
4ca8d070 | 519 | { |
520 | return 1.; | |
521 | } | |
522 | ||
05932df6 | 523 | |
75e0cc59 | 524 | Double_t AliGenMUONlib::YJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 525 | { |
526 | ||
527 | // | |
528 | // J/Psi y | |
529 | // | |
530 | // | |
531 | // R. Vogt 2002 | |
532 | // PbPb 5.5 TeV | |
533 | // MRST HO | |
534 | // mc = 1.4 GeV, pt-kick 1 GeV | |
535 | // | |
1af7144e | 536 | Double_t c[5] = {-6.03425e+02, 4.98257e+02, -1.38794e+02, 1.62209e+01, -6.85955e-01}; |
537 | Double_t x = TMath::Abs(px[0]); | |
538 | Double_t y; | |
539 | ||
540 | if (x < 4.) { | |
541 | y = 31.754; | |
542 | } else if (x < 6) { | |
543 | Int_t j; | |
544 | y = c[j = 4]; | |
545 | while (j > 0) y = y * x + c[--j]; | |
546 | } else { | |
547 | y =0.; | |
548 | } | |
549 | ||
550 | return y; | |
05932df6 | 551 | } |
552 | ||
75e0cc59 | 553 | Double_t AliGenMUONlib::YJpsiCDFscaled( const Double_t *px, const Double_t* dummy) |
0e137c25 | 554 | { |
555 | // J/Psi y | |
556 | return AliGenMUONlib::YJpsiPbPb(px, dummy); | |
557 | } | |
558 | ||
75e0cc59 | 559 | Double_t AliGenMUONlib::YJpsiCDFscaledPP( const Double_t *px, const Double_t* dummy) |
9ff13849 | 560 | { |
561 | // J/Psi y | |
562 | return AliGenMUONlib::YJpsiPP(px, dummy); | |
563 | } | |
0e137c25 | 564 | |
75e0cc59 | 565 | Double_t AliGenMUONlib::YJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 566 | { |
9e9ae065 | 567 | // J/Psi y |
568 | // | |
569 | // pp 10 TeV | |
570 | // scaled from YJpsiPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
571 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
572 | // | |
573 | ||
574 | Double_t c[5] = {2.46681e+01, 8.91486e+01, -3.21227e+01, 3.63075e+00, -1.32047e-01}; | |
575 | ||
576 | Double_t x = TMath::Abs(px[0]); | |
577 | Double_t y; | |
578 | ||
579 | if (x < 3.2) { | |
580 | y = 98.523 - 1.3664 * x * x; | |
581 | } else if (x < 7.5) { | |
582 | Int_t j; | |
583 | y = c[j = 4]; | |
584 | while (j > 0) y = y * x + c[--j]; | |
585 | } else { | |
586 | y =0.; | |
587 | } | |
588 | ||
589 | if(y<0) y=0; | |
590 | ||
591 | return y; | |
592 | } | |
593 | ||
9fd56238 | 594 | Double_t AliGenMUONlib::YJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
595 | { | |
596 | // J/Psi y | |
597 | // | |
598 | // pp 8.8 TeV | |
599 | // rescaling of YJpsiPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD | |
600 | // | |
601 | Double_t c[5] = {3.33882e+02, -1.30980e+02, 2.59082e+01, -3.08935e+00, 1.56375e-01}; | |
602 | Double_t x = TMath::Abs(px[0]); | |
603 | Double_t y; | |
604 | ||
605 | if (x < 3.7) { | |
606 | y = 99.236 - 1.5498 * x * x; | |
607 | } else if (x < 7.4) { | |
608 | Int_t j; | |
609 | y = c[j = 4]; | |
610 | while (j > 0) y = y * x + c[--j]; | |
611 | } else { | |
612 | y =0.; | |
613 | } | |
614 | ||
615 | if(y<0) y=0; | |
616 | ||
617 | return y; | |
618 | } | |
619 | ||
620 | Double_t AliGenMUONlib::YJpsiCDFscaledPP9dummy(Double_t px) | |
621 | { | |
622 | return AliGenMUONlib::YJpsiCDFscaledPP9(&px, (Double_t*) 0); | |
623 | } | |
624 | ||
625 | Double_t AliGenMUONlib::YJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
626 | { | |
627 | // J/Psi y | |
628 | // | |
629 | // pp 7 TeV | |
630 | // scaled from YJpsiPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
631 | // | |
632 | ||
633 | Double_t c[5] = {6.71181e+02, -3.69240e+02, 8.89644e+01, -1.04937e+01, 4.80959e-01}; | |
634 | ||
635 | Double_t x = TMath::Abs(px[0]); | |
636 | Double_t y; | |
637 | ||
638 | if (x < 4.0) { | |
639 | y = 100.78 - 1.8353 * x * x; | |
640 | } else if (x < 7.3) { | |
641 | Int_t j; | |
642 | y = c[j = 4]; | |
643 | while (j > 0) y = y * x + c[--j]; | |
644 | } else { | |
645 | y =0.; | |
646 | } | |
647 | ||
648 | if(y<0) y=0; | |
649 | ||
650 | return y; | |
651 | } | |
652 | ||
653 | Double_t AliGenMUONlib::YJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
654 | { | |
655 | // J/Psi y | |
656 | // | |
657 | // pp 3.94 TeV | |
658 | // rescaling of YJpsiPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD | |
659 | // | |
660 | Double_t c[5] = {4.00785e+02, -1.41159e+01, -3.28599e+01, 5.53048e+00, -2.45151e-01}; | |
661 | Double_t x = TMath::Abs(px[0]); | |
662 | Double_t y; | |
663 | ||
664 | if (x < 5.5) { | |
665 | y = 107.389 - 2.7454 * x * x; | |
666 | } else if (x < 7.0) { | |
667 | Int_t j; | |
668 | y = c[j = 4]; | |
669 | while (j > 0) y = y * x + c[--j]; | |
670 | } else { | |
671 | y =0.; | |
672 | } | |
673 | ||
674 | if(y<0) y=0; | |
675 | ||
676 | return y; | |
677 | } | |
678 | ||
a4f206bf | 679 | Double_t AliGenMUONlib::YJpsiCDFscaledPP3( const Double_t *px, const Double_t *dummy) |
680 | { | |
681 | // J/Psi y | |
682 | return AliGenMUONlib::YJpsiPP2760(px, dummy); | |
683 | } | |
684 | ||
685 | Double_t AliGenMUONlib::YJpsiCDFscaledPP2( const Double_t *px, const Double_t */*dummy*/) | |
686 | { | |
687 | // J/Psi y | |
688 | // | |
689 | // pp 1.9 TeV | |
690 | // from the fit of RHIC + LHC data, see arXiv:1103.2394 | |
691 | // | |
692 | Double_t x = px[0]/6.42; | |
693 | x = x*x; | |
694 | Double_t y = TMath::Exp(-x/0.383/0.383/2); | |
695 | if(x > 1) y=0; | |
696 | return y; | |
697 | } | |
698 | ||
75e0cc59 | 699 | Double_t AliGenMUONlib::YJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 700 | { |
701 | ||
702 | // | |
703 | // J/Psi y | |
704 | // | |
705 | // | |
706 | // R. Vogt 2002 | |
707 | // pp 14 TeV | |
708 | // MRST HO | |
709 | // mc = 1.4 GeV, pt-kick 1 GeV | |
710 | // | |
711 | ||
712 | Double_t c[5] = {1.38532e+00, 1.00596e+02, -3.46378e+01, 3.94172e+00, -1.48319e-01}; | |
713 | Double_t x = TMath::Abs(px[0]); | |
714 | Double_t y; | |
715 | ||
716 | if (x < 2.5) { | |
717 | y = 96.455 - 0.8483 * x * x; | |
718 | } else if (x < 7.9) { | |
719 | Int_t j; | |
720 | y = c[j = 4]; | |
721 | while (j > 0) y = y * x + c[--j]; | |
722 | } else { | |
723 | y =0.; | |
724 | } | |
725 | ||
726 | return y; | |
727 | } | |
728 | ||
9fd56238 | 729 | Double_t AliGenMUONlib::YJpsiCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) |
730 | { | |
731 | // J/Psi y | |
732 | // | |
733 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
734 | // | |
735 | Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, | |
736 | -4.16509e-05,-7.62709e-06}; | |
737 | Double_t y; | |
738 | Double_t x = px[0] + 0.47; // rapidity shift | |
739 | Int_t j; | |
740 | y = c[j = 6]; | |
741 | while (j > 0) y = y * x + c[--j]; | |
742 | if(y<0) y=0; | |
743 | ||
744 | return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); | |
745 | } | |
746 | ||
747 | Double_t AliGenMUONlib::YJpsiCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) | |
748 | { | |
749 | // J/Psi y | |
750 | // | |
751 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
752 | // | |
753 | Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, | |
754 | -4.16509e-05,-7.62709e-06}; | |
755 | Double_t y; | |
756 | Double_t x = -px[0] + 0.47; // rapidity shift | |
757 | Int_t j; | |
758 | y = c[j = 6]; | |
759 | while (j > 0) y = y * x + c[--j]; | |
760 | if(y<0) y=0; | |
761 | ||
762 | return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); | |
763 | } | |
764 | ||
765 | Double_t AliGenMUONlib::YJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
766 | { | |
767 | // J/Psi y | |
768 | // | |
769 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
770 | // | |
771 | Double_t c[4] = {5.95228e-01, 9.45069e-03, 2.44710e-04, -1.32894e-05}; | |
772 | Double_t x = px[0]*px[0]; | |
773 | Double_t y; | |
774 | Int_t j; | |
775 | y = c[j = 3]; | |
776 | while (j > 0) y = y * x + c[--j]; | |
777 | if(y<0) y=0; | |
778 | ||
779 | return y * AliGenMUONlib::YJpsiCDFscaledPP4(px,dummy); | |
780 | } | |
781 | ||
75e0cc59 | 782 | Double_t AliGenMUONlib::YJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 783 | { |
784 | ||
785 | // | |
786 | // J/Psi from B->J/Psi X | |
787 | // | |
788 | // | |
789 | ||
790 | ||
791 | Double_t c[7] = {7.37025e-02, 0., -2.94487e-03, 0., 6.07953e-06, 0., 5.39219e-07}; | |
792 | ||
793 | Double_t x = TMath::Abs(px[0]); | |
794 | Double_t y; | |
795 | ||
796 | if (x > 6.) { | |
797 | y = 0.; | |
798 | } else { | |
799 | Int_t j; | |
800 | y = c[j = 6]; | |
801 | while (j > 0) y = y * x + c[--j]; | |
802 | } | |
803 | ||
804 | return y; | |
805 | } | |
806 | ||
807 | ||
808 | ||
fe4da5cc | 809 | // particle composition |
810 | // | |
65fb704d | 811 | Int_t AliGenMUONlib::IpJpsi(TRandom *) |
fe4da5cc | 812 | { |
d90f80fd | 813 | // J/Psi composition |
88cb7938 | 814 | return 443; |
fe4da5cc | 815 | } |
88e5db43 | 816 | Int_t AliGenMUONlib::IpPsiP(TRandom *) |
817 | { | |
818 | // Psi prime composition | |
819 | return 100443; | |
820 | } | |
0ad09590 | 821 | Int_t AliGenMUONlib::IpJpsiFamily(TRandom *) |
822 | { | |
823 | // J/Psi composition | |
824 | Int_t ip; | |
825 | Float_t r = gRandom->Rndm(); | |
826 | if (r < 0.98) { | |
827 | ip = 443; | |
828 | } else { | |
829 | ip = 100443; | |
830 | } | |
831 | return ip; | |
832 | } | |
833 | ||
fe4da5cc | 834 | |
88e5db43 | 835 | |
fe4da5cc | 836 | // Upsilon |
837 | // | |
838 | // | |
839 | // pt-distribution | |
840 | //____________________________________________________________ | |
75e0cc59 | 841 | Double_t AliGenMUONlib::PtUpsilon( const Double_t *px, const Double_t */*dummy*/ ) |
fe4da5cc | 842 | { |
d90f80fd | 843 | // Upsilon pT |
844 | const Double_t kpt0 = 5.3; | |
845 | const Double_t kxn = 2.5; | |
fe4da5cc | 846 | Double_t x=*px; |
847 | // | |
d90f80fd | 848 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
849 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 850 | } |
05932df6 | 851 | |
75e0cc59 | 852 | Double_t AliGenMUONlib::PtUpsilonCDFscaled( const Double_t *px, const Double_t */*dummy*/ ) |
0e137c25 | 853 | { |
854 | // Upsilon pT | |
48416d65 | 855 | const Double_t kpt0 = 7.753; |
856 | const Double_t kxn = 3.042; | |
0e137c25 | 857 | Double_t x=*px; |
858 | // | |
859 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
860 | return x/TMath::Power(pass1,kxn); | |
861 | } | |
862 | ||
75e0cc59 | 863 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP( const Double_t *px, const Double_t */*dummy*/ ) |
9ff13849 | 864 | { |
865 | // Upsilon pT | |
866 | // | |
867 | // pp 14 TeV | |
868 | // | |
869 | // scaled from CDF data at 2 TeV | |
870 | ||
871 | const Double_t kpt0 = 8.610; | |
872 | const Double_t kxn = 3.051; | |
873 | Double_t x=*px; | |
874 | // | |
875 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
876 | return x/TMath::Power(pass1,kxn); | |
877 | } | |
878 | ||
b33adf51 | 879 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
880 | { | |
881 | // Upsilon pT | |
882 | // | |
883 | // pp 10 TeV | |
884 | // | |
885 | // scaled from CDF data at 2 TeV | |
886 | ||
887 | const Double_t kpt0 = 8.235; | |
888 | const Double_t kxn = 3.051; | |
889 | Double_t x=*px; | |
890 | // | |
891 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
892 | return x/TMath::Power(pass1,kxn); | |
893 | } | |
894 | ||
9fd56238 | 895 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
896 | { | |
897 | // Upsilon pT | |
898 | // | |
899 | // pp 8.8 TeV | |
900 | // scaled from CDF data at 2 TeV | |
901 | // | |
902 | const Double_t kpt0 = 8.048; | |
903 | const Double_t kxn = 3.051; | |
904 | Double_t x=*px; | |
905 | // | |
906 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
907 | return x/TMath::Power(pass1,kxn); | |
908 | } | |
909 | ||
910 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
911 | { | |
912 | // Upsilon pT | |
913 | // | |
914 | // pp 7 TeV | |
915 | // | |
916 | // scaled from CDF data at 2 TeV | |
917 | ||
918 | const Double_t kpt0 = 7.817; | |
919 | const Double_t kxn = 3.051; | |
920 | Double_t x=*px; | |
921 | // | |
922 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
923 | return x/TMath::Power(pass1,kxn); | |
924 | } | |
925 | ||
926 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
927 | { | |
928 | // Upsilon pT | |
929 | // | |
930 | // pp 3.94 TeV | |
931 | // scaled from CDF data at 2 TeV | |
932 | // | |
933 | const Double_t kpt0 = 7.189; | |
934 | const Double_t kxn = 3.051; | |
935 | Double_t x=*px; | |
936 | // | |
937 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
938 | return x/TMath::Power(pass1,kxn); | |
939 | } | |
940 | ||
941 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPPb9( const Double_t *px, const Double_t *dummy) | |
942 | { | |
943 | // Upsilon pT | |
944 | // | |
945 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
946 | // | |
947 | Double_t c[5] = {7.64952e-01, 1.12501e-04, 4.96038e-04, -3.03198e-05, 3.74035e-06}; | |
948 | Double_t x=*px; | |
949 | Double_t y; | |
950 | Int_t j; | |
951 | y = c[j = 4]; | |
952 | while (j > 0) y = y * x + c[--j]; | |
953 | // | |
954 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
955 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); | |
956 | } | |
957 | ||
958 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPbP9( const Double_t *px, const Double_t *dummy) | |
959 | { | |
960 | // Upsilon pT | |
961 | // | |
962 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
963 | // | |
964 | Double_t c[5] = {1.09881e+00, 3.08329e-03, -2.00356e-04, 8.28991e-06, 2.52576e-06}; | |
965 | Double_t x=*px; | |
966 | Double_t y; | |
967 | Int_t j; | |
968 | y = c[j = 4]; | |
969 | while (j > 0) y = y * x + c[--j]; | |
970 | // | |
971 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
972 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); | |
973 | } | |
974 | ||
975 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
976 | { | |
977 | // Upsilon pT | |
978 | // | |
979 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 | |
980 | // | |
981 | Double_t c[5] = {8.65872e-01, 2.05465e-03, 2.56063e-04, -1.65598e-05, 2.29209e-06}; | |
982 | Double_t x=*px; | |
983 | Double_t y; | |
984 | Int_t j; | |
985 | y = c[j = 4]; | |
986 | while (j > 0) y = y * x + c[--j]; | |
987 | // | |
988 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
989 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP4(px,dummy); | |
990 | } | |
991 | ||
75e0cc59 | 992 | Double_t AliGenMUONlib::PtUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 993 | { |
994 | return 1.; | |
995 | } | |
996 | ||
75e0cc59 | 997 | Double_t AliGenMUONlib::PtUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 998 | { |
05932df6 | 999 | // |
1000 | // Upsilon pT | |
1001 | // | |
1002 | // | |
1003 | // R. Vogt 2002 | |
1004 | // PbPb 5.5 TeV | |
1005 | // MRST HO | |
1006 | // mc = 1.4 GeV, pt-kick 1 GeV | |
1007 | // | |
1af7144e | 1008 | Float_t x = px[0]; |
1009 | Double_t c[8] = { | |
1010 | -1.03488e+01, 1.28065e+01, -6.60500e+00, 1.66140e+00, | |
1011 | -2.34293e-01, 1.86925e-02, -7.80708e-04, 1.30610e-05 | |
1012 | }; | |
3d905dd7 | 1013 | Double_t y; |
1014 | if (x < 10.) { | |
1015 | Int_t j; | |
1016 | y = c[j = 7]; | |
1017 | while (j > 0) y = y * x +c[--j]; | |
1018 | y = x * TMath::Exp(y); | |
1019 | } else { | |
1020 | y = 0.; | |
1021 | } | |
1af7144e | 1022 | return y; |
05932df6 | 1023 | } |
1024 | ||
75e0cc59 | 1025 | Double_t AliGenMUONlib::PtUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 1026 | { |
bb6e81ac | 1027 | // |
1028 | // Upsilon pT | |
1029 | // | |
1030 | // | |
1031 | // R. Vogt 2002 | |
1032 | // pp 14 TeV | |
1033 | // MRST HO | |
1034 | // mc = 1.4 GeV, pt-kick 1 GeV | |
1035 | // | |
1036 | Float_t x = px[0]; | |
1037 | Double_t c[8] = {-7.93955e+00, 1.06306e+01, -5.21392e+00, 1.19703e+00, | |
1038 | -1.45718e-01, 8.95151e-03, -2.04806e-04, -1.13053e-06}; | |
1039 | ||
1040 | Double_t y; | |
1041 | if (x < 10.) { | |
1042 | Int_t j; | |
1043 | y = c[j = 7]; | |
1044 | while (j > 0) y = y * x +c[--j]; | |
1045 | y = x * TMath::Exp(y); | |
1046 | } else { | |
1047 | y = 0.; | |
1048 | } | |
1049 | return y; | |
1050 | } | |
1051 | ||
fe4da5cc | 1052 | // |
1053 | // y-distribution | |
1054 | // | |
1055 | //____________________________________________________________ | |
75e0cc59 | 1056 | Double_t AliGenMUONlib::YUpsilon(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 1057 | { |
d90f80fd | 1058 | // Upsilon y |
1059 | const Double_t ky0 = 3.; | |
1060 | const Double_t kb=1.; | |
fe4da5cc | 1061 | Double_t yu; |
1062 | Double_t y=TMath::Abs(*py); | |
1063 | // | |
d90f80fd | 1064 | if (y < ky0) |
1065 | yu=kb; | |
fe4da5cc | 1066 | else |
d90f80fd | 1067 | yu=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 1068 | return yu; |
1069 | } | |
05932df6 | 1070 | |
1071 | ||
75e0cc59 | 1072 | Double_t AliGenMUONlib::YUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 1073 | { |
1074 | ||
1075 | // | |
1076 | // Upsilon y | |
1077 | // | |
1078 | // | |
1079 | // R. Vogt 2002 | |
1080 | // PbPb 5.5 TeV | |
1081 | // MRST HO | |
1082 | // mc = 1.4 GeV, pt-kick 1 GeV | |
1083 | // | |
1084 | ||
1af7144e | 1085 | Double_t c[7] = {3.40036e-01, -3.98882e-07, -4.48398e-03, 8.46411e-08, -6.10854e-04, |
1086 | -2.99753e-09, 1.28895e-05}; | |
b33adf51 | 1087 | Double_t x = TMath::Abs(px[0]); |
1088 | if (x > 5.55) return 0.; | |
1af7144e | 1089 | Int_t j; |
1090 | Double_t y = c[j = 6]; | |
1091 | while (j > 0) y = y * x +c[--j]; | |
1092 | return y; | |
05932df6 | 1093 | } |
1094 | ||
75e0cc59 | 1095 | Double_t AliGenMUONlib::YUpsilonCDFscaled( const Double_t *px, const Double_t *dummy) |
0e137c25 | 1096 | { |
1097 | // Upsilon y | |
1098 | return AliGenMUONlib::YUpsilonPbPb(px, dummy); | |
1099 | ||
4ca8d070 | 1100 | } |
9ff13849 | 1101 | |
75e0cc59 | 1102 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP( const Double_t *px, const Double_t *dummy) |
9ff13849 | 1103 | { |
1104 | // Upsilon y | |
1105 | return AliGenMUONlib::YUpsilonPP(px, dummy); | |
1106 | ||
1107 | } | |
1108 | ||
75e0cc59 | 1109 | Double_t AliGenMUONlib::YUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/) |
4ca8d070 | 1110 | { |
1111 | // Upsilon y | |
1112 | return 1.; | |
1113 | ||
0e137c25 | 1114 | } |
1115 | ||
b33adf51 | 1116 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
1117 | { | |
b33adf51 | 1118 | // Upsilon y |
1119 | // | |
1120 | // pp 10 TeV | |
1121 | // scaled from YUpsilonPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
1122 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
1123 | // | |
9fd56238 | 1124 | Double_t c[4] = {1., -2.17877e-02, -6.52830e-04, 1.40578e-05}; |
1125 | Double_t x = TMath::Abs(px[0]); | |
1126 | if (x > 6.1) return 0.; | |
1127 | Int_t j; | |
1128 | Double_t y = c[j = 3]; | |
1129 | while (j > 0) y = y * x*x +c[--j]; | |
1130 | return y; | |
1131 | } | |
1132 | ||
1133 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) | |
1134 | { | |
1135 | // Upsilon y | |
1136 | // | |
1137 | // pp 8.8 TeV | |
1138 | // rescaling of YUpsilonPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD | |
1139 | // | |
1140 | Double_t c[4] = {1., -2.37621e-02, -6.29610e-04, 1.47976e-05}; | |
b33adf51 | 1141 | Double_t x = TMath::Abs(px[0]); |
1142 | if (x > 6.1) return 0.; | |
1143 | Int_t j; | |
1144 | Double_t y = c[j = 3]; | |
1145 | while (j > 0) y = y * x*x +c[--j]; | |
1146 | return y; | |
1147 | } | |
1148 | ||
9fd56238 | 1149 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP9dummy(Double_t px) |
1150 | { | |
1151 | return AliGenMUONlib::YUpsilonCDFscaledPP9(&px, (Double_t*) 0); | |
1152 | } | |
1153 | ||
1154 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
1155 | { | |
1156 | // Upsilon y | |
1157 | // | |
1158 | // pp 7 TeV | |
1159 | // scaled from YUpsilonPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
1160 | // | |
1161 | Double_t c[4] = {1., -2.61009e-02, -6.83937e-04, 1.78451e-05}; | |
1162 | Double_t x = TMath::Abs(px[0]); | |
1163 | if (x > 6.0) return 0.; | |
1164 | Int_t j; | |
1165 | Double_t y = c[j = 3]; | |
1166 | while (j > 0) y = y * x*x +c[--j]; | |
1167 | return y; | |
1168 | } | |
1169 | ||
1170 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
1171 | { | |
1172 | // Upsilon y | |
1173 | // | |
1174 | // pp 3.94 TeV | |
1175 | // rescaling of YUpsilonPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD | |
1176 | // | |
1177 | Double_t c[4] = {1., -3.91924e-02, -4.26184e-04, 2.10914e-05}; | |
1178 | Double_t x = TMath::Abs(px[0]); | |
1179 | if (x > 5.7) return 0.; | |
1180 | Int_t j; | |
1181 | Double_t y = c[j = 3]; | |
1182 | while (j > 0) y = y * x*x +c[--j]; | |
1183 | ||
1184 | return y; | |
1185 | } | |
1186 | ||
75e0cc59 | 1187 | Double_t AliGenMUONlib::YUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 1188 | { |
1189 | ||
1190 | // | |
1191 | // Upsilon y | |
1192 | // | |
1193 | // | |
1194 | // R. Vogt 2002 | |
1195 | // p p 14. TeV | |
1196 | // MRST HO | |
1197 | // mc = 1.4 GeV, pt-kick 1 GeV | |
1198 | // | |
1199 | Double_t c[7] = {8.91936e-01, -6.46645e-07, -1.52774e-02, 4.28677e-08, -7.01517e-04, | |
1200 | -6.20539e-10, 1.29943e-05}; | |
b33adf51 | 1201 | Double_t x = TMath::Abs(px[0]); |
1202 | if (x > 6.2) return 0.; | |
bb6e81ac | 1203 | Int_t j; |
1204 | Double_t y = c[j = 6]; | |
1205 | while (j > 0) y = y * x +c[--j]; | |
1206 | return y; | |
1207 | } | |
1208 | ||
9fd56238 | 1209 | Double_t AliGenMUONlib::YUpsilonCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) |
1210 | { | |
1211 | // Upsilon y | |
1212 | // | |
1213 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
1214 | // | |
1215 | Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, | |
1216 | -4.67538e-05,-2.11683e-06}; | |
1217 | Double_t y; | |
1218 | Double_t x = px[0] + 0.47; // rapidity shift | |
1219 | Int_t j; | |
1220 | y = c[j = 6]; | |
1221 | while (j > 0) y = y * x + c[--j]; | |
1222 | if(y<0) y=0; | |
1223 | ||
1224 | return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); | |
1225 | } | |
1226 | ||
1227 | Double_t AliGenMUONlib::YUpsilonCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) | |
1228 | { | |
1229 | // Upsilon y | |
1230 | // | |
1231 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
1232 | // | |
1233 | Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, | |
1234 | -4.67538e-05,-2.11683e-06}; | |
1235 | Double_t y; | |
1236 | Double_t x = -px[0] + 0.47; // rapidity shift | |
1237 | Int_t j; | |
1238 | y = c[j = 6]; | |
1239 | while (j > 0) y = y * x + c[--j]; | |
1240 | if(y<0) y=0; | |
1241 | ||
1242 | return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); | |
1243 | } | |
1244 | ||
1245 | Double_t AliGenMUONlib::YUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
1246 | { | |
1247 | // Upsilon y | |
1248 | // | |
1249 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 | |
1250 | // | |
1251 | Double_t c[4] = {8.27837e-01, 1.70115e-02, -1.26046e-03, 1.52091e-05}; | |
1252 | Double_t x = px[0]*px[0]; | |
1253 | Double_t y; | |
1254 | Int_t j; | |
1255 | y = c[j = 3]; | |
1256 | while (j > 0) y = y * x + c[--j]; | |
1257 | if(y<0) y=0; | |
1258 | ||
1259 | return y * AliGenMUONlib::YUpsilonCDFscaledPP4(px,dummy); | |
1260 | } | |
1261 | ||
1262 | ||
fe4da5cc | 1263 | // particle composition |
1264 | // | |
65fb704d | 1265 | Int_t AliGenMUONlib::IpUpsilon(TRandom *) |
fe4da5cc | 1266 | { |
d90f80fd | 1267 | // y composition |
88cb7938 | 1268 | return 553; |
fe4da5cc | 1269 | } |
88e5db43 | 1270 | Int_t AliGenMUONlib::IpUpsilonP(TRandom *) |
1271 | { | |
1272 | // y composition | |
1273 | return 100553; | |
1274 | } | |
1275 | Int_t AliGenMUONlib::IpUpsilonPP(TRandom *) | |
1276 | { | |
1277 | // y composition | |
1278 | return 200553; | |
1279 | } | |
0ad09590 | 1280 | Int_t AliGenMUONlib::IpUpsilonFamily(TRandom *) |
1281 | { | |
1282 | // y composition | |
1283 | Int_t ip; | |
1284 | Float_t r = gRandom->Rndm(); | |
1285 | ||
1286 | if (r < 0.712) { | |
1287 | ip = 553; | |
1288 | } else if (r < 0.896) { | |
1289 | ip = 100553; | |
1290 | } else { | |
1291 | ip = 200553; | |
1292 | } | |
1293 | return ip; | |
1294 | } | |
fe4da5cc | 1295 | |
88e5db43 | 1296 | |
fe4da5cc | 1297 | // |
1298 | // Phi | |
1299 | // | |
1300 | // | |
1301 | // pt-distribution (by scaling of pion distribution) | |
1302 | //____________________________________________________________ | |
75e0cc59 | 1303 | Double_t AliGenMUONlib::PtPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1304 | { |
d90f80fd | 1305 | // Phi pT |
a4f206bf | 1306 | return PtScal(*px,7); |
fe4da5cc | 1307 | } |
1308 | // y-distribution | |
75e0cc59 | 1309 | Double_t AliGenMUONlib::YPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1310 | { |
d90f80fd | 1311 | // Phi y |
1312 | Double_t *dum=0; | |
1313 | return YJpsi(px,dum); | |
fe4da5cc | 1314 | } |
1315 | // particle composition | |
1316 | // | |
65fb704d | 1317 | Int_t AliGenMUONlib::IpPhi(TRandom *) |
fe4da5cc | 1318 | { |
d90f80fd | 1319 | // Phi composition |
89512a3b | 1320 | return 333; |
1321 | } | |
1322 | ||
1323 | // | |
1324 | // omega | |
1325 | // | |
1326 | // | |
1327 | // pt-distribution (by scaling of pion distribution) | |
1328 | //____________________________________________________________ | |
75e0cc59 | 1329 | Double_t AliGenMUONlib::PtOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1330 | { |
1331 | // Omega pT | |
a4f206bf | 1332 | return PtScal(*px,5); |
89512a3b | 1333 | } |
1334 | // y-distribution | |
75e0cc59 | 1335 | Double_t AliGenMUONlib::YOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1336 | { |
1337 | // Omega y | |
1338 | Double_t *dum=0; | |
1339 | return YJpsi(px,dum); | |
1340 | } | |
1341 | // particle composition | |
1342 | // | |
1343 | Int_t AliGenMUONlib::IpOmega(TRandom *) | |
1344 | { | |
1345 | // Omega composition | |
1346 | return 223; | |
1347 | } | |
1348 | ||
1349 | ||
1350 | // | |
1351 | // Eta | |
1352 | // | |
1353 | // | |
1354 | // pt-distribution (by scaling of pion distribution) | |
1355 | //____________________________________________________________ | |
75e0cc59 | 1356 | Double_t AliGenMUONlib::PtEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1357 | { |
1358 | // Eta pT | |
a4f206bf | 1359 | return PtScal(*px,3); |
89512a3b | 1360 | } |
1361 | // y-distribution | |
75e0cc59 | 1362 | Double_t AliGenMUONlib::YEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1363 | { |
1364 | // Eta y | |
1365 | Double_t *dum=0; | |
1366 | return YJpsi(px,dum); | |
1367 | } | |
1368 | // particle composition | |
1369 | // | |
1370 | Int_t AliGenMUONlib::IpEta(TRandom *) | |
1371 | { | |
1372 | // Eta composition | |
1373 | return 221; | |
fe4da5cc | 1374 | } |
1375 | ||
1376 | // | |
1377 | // Charm | |
1378 | // | |
1379 | // | |
1380 | // pt-distribution | |
1381 | //____________________________________________________________ | |
75e0cc59 | 1382 | Double_t AliGenMUONlib::PtCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1383 | { |
d90f80fd | 1384 | // Charm pT |
bd0276a8 | 1385 | const Double_t kpt0 = 2.25; |
1386 | const Double_t kxn = 3.17; | |
fe4da5cc | 1387 | Double_t x=*px; |
1388 | // | |
bd0276a8 | 1389 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
1390 | return x/TMath::Power(pass1,kxn); | |
1391 | } | |
1392 | ||
75e0cc59 | 1393 | Double_t AliGenMUONlib::PtCharmCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 1394 | { |
1395 | // Charm pT | |
1396 | const Double_t kpt0 = 2.12; | |
1397 | const Double_t kxn = 2.78; | |
bd0276a8 | 1398 | Double_t x=*px; |
1399 | // | |
1400 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
d90f80fd | 1401 | return x/TMath::Power(pass1,kxn); |
fe4da5cc | 1402 | } |
75e0cc59 | 1403 | Double_t AliGenMUONlib::PtCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1404 | { |
1405 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1406 | // PtCharmFiMjSkPP = PtCharmF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
1407 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1408 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1409 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1410 | // calculations for the following inputs: | |
1411 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
1412 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
1413 | // for j=0,1 & 2 respectively; | |
1414 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1415 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
1416 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1417 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1418 | // June 2008, Smbat.Grigoryan@cern.ch | |
1419 | ||
1420 | // Charm pT | |
1421 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
1422 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
1423 | // Corresponding NLO total cross section is 5.68 mb | |
1424 | ||
1425 | ||
1426 | const Double_t kpt0 = 2.2930; | |
1427 | const Double_t kxn = 3.1196; | |
1428 | Double_t c[3]={-5.2180e-01,1.8753e-01,2.8669e-02}; | |
1429 | Double_t x=*px; | |
1430 | // | |
1431 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1432 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1433 | } | |
75e0cc59 | 1434 | Double_t AliGenMUONlib::PtCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1435 | { |
1436 | // Charm pT | |
1437 | // Corresponding NLO total cross section is 6.06 mb | |
1438 | const Double_t kpt0 = 2.8669; | |
1439 | const Double_t kxn = 3.1044; | |
1440 | Double_t c[3]={-4.6714e-01,1.5005e-01,4.5003e-02}; | |
1441 | Double_t x=*px; | |
1442 | // | |
1443 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1444 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1445 | } | |
75e0cc59 | 1446 | Double_t AliGenMUONlib::PtCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1447 | { |
1448 | // Charm pT | |
1449 | // Corresponding NLO total cross section is 6.06 mb | |
1450 | const Double_t kpt0 = 1.8361; | |
1451 | const Double_t kxn = 3.2966; | |
1452 | Double_t c[3]={-6.1550e-01,2.6498e-01,1.0728e-02}; | |
1453 | Double_t x=*px; | |
1454 | // | |
1455 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1456 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1457 | } | |
75e0cc59 | 1458 | Double_t AliGenMUONlib::PtCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1459 | { |
1460 | // Charm pT | |
1461 | // Corresponding NLO total cross section is 7.69 mb | |
1462 | const Double_t kpt0 = 2.1280; | |
1463 | const Double_t kxn = 3.1397; | |
1464 | Double_t c[3]={-5.4021e-01,2.0944e-01,2.5211e-02}; | |
1465 | Double_t x=*px; | |
1466 | // | |
1467 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1468 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1469 | } | |
75e0cc59 | 1470 | Double_t AliGenMUONlib::PtCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1471 | { |
1472 | // Charm pT | |
1473 | // Corresponding NLO total cross section is 4.81 mb | |
1474 | const Double_t kpt0 = 2.4579; | |
1475 | const Double_t kxn = 3.1095; | |
1476 | Double_t c[3]={-5.1497e-01,1.7532e-01,3.2429e-02}; | |
1477 | Double_t x=*px; | |
1478 | // | |
1479 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1480 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1481 | } | |
75e0cc59 | 1482 | Double_t AliGenMUONlib::PtCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1483 | { |
1484 | // Charm pT | |
1485 | // Corresponding NLO total cross section is 14.09 mb | |
1486 | const Double_t kpt0 = 2.1272; | |
1487 | const Double_t kxn = 3.1904; | |
1488 | Double_t c[3]={-4.6088e-01,2.1918e-01,2.3055e-02}; | |
1489 | Double_t x=*px; | |
1490 | // | |
1491 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1492 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1493 | } | |
75e0cc59 | 1494 | Double_t AliGenMUONlib::PtCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1495 | { |
1496 | // Charm pT | |
1497 | // Corresponding NLO total cross section is 1.52 mb | |
1498 | const Double_t kpt0 = 2.8159; | |
1499 | const Double_t kxn = 3.0857; | |
1500 | Double_t c[3]={-6.4691e-01,2.0289e-01,2.4922e-02}; | |
1501 | Double_t x=*px; | |
1502 | // | |
1503 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1504 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1505 | } | |
75e0cc59 | 1506 | Double_t AliGenMUONlib::PtCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1507 | { |
1508 | // Charm pT | |
1509 | // Corresponding NLO total cross section is 3.67 mb | |
1510 | const Double_t kpt0 = 2.7297; | |
1511 | const Double_t kxn = 3.3019; | |
1512 | Double_t c[3]={-6.2216e-01,1.9031e-01,1.5341e-02}; | |
1513 | Double_t x=*px; | |
1514 | // | |
1515 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1516 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1517 | } | |
75e0cc59 | 1518 | Double_t AliGenMUONlib::PtCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1519 | { |
1520 | // Charm pT | |
1521 | // Corresponding NLO total cross section is 3.38 mb | |
1522 | const Double_t kpt0 = 2.3894; | |
1523 | const Double_t kxn = 3.1075; | |
1524 | Double_t c[3]={-4.9742e-01,1.7032e-01,2.5994e-02}; | |
1525 | Double_t x=*px; | |
1526 | // | |
1527 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1528 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1529 | } | |
75e0cc59 | 1530 | Double_t AliGenMUONlib::PtCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1531 | { |
1532 | // Charm pT | |
1533 | // Corresponding NLO total cross section is 10.37 mb | |
1534 | const Double_t kpt0 = 2.0187; | |
1535 | const Double_t kxn = 3.3011; | |
1536 | Double_t c[3]={-3.9869e-01,2.9248e-01,1.1763e-02}; | |
1537 | Double_t x=*px; | |
1538 | // | |
1539 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1540 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1541 | } | |
75e0cc59 | 1542 | Double_t AliGenMUONlib::PtCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1543 | { |
1544 | // Charm pT | |
1545 | // Corresponding NLO total cross section is 7.22 mb | |
1546 | const Double_t kpt0 = 2.1089; | |
1547 | const Double_t kxn = 3.1848; | |
1548 | Double_t c[3]={-4.6275e-01,1.8114e-01,2.1363e-02}; | |
1549 | Double_t x=*px; | |
1550 | // | |
1551 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1552 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1553 | } | |
1554 | ||
fe4da5cc | 1555 | // y-distribution |
75e0cc59 | 1556 | Double_t AliGenMUONlib::YCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1557 | { |
ec772ba2 | 1558 | // Charm y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
1559 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
1560 | // shadowing + kt broadening | |
1561 | ||
1562 | Double_t x=px[0]; | |
1563 | Double_t c[2]={-2.42985e-03,-2.31001e-04}; | |
1564 | Double_t y=1+(c[0]*TMath::Power(x,2))+(c[1]*TMath::Power(x,4)); | |
1565 | Double_t ycharm; | |
1566 | ||
1567 | if (TMath::Abs(x)>8) { | |
1568 | ycharm=0.; | |
1569 | } | |
1570 | else { | |
1571 | ycharm=TMath::Power(y,3); | |
1572 | } | |
1573 | ||
1574 | return ycharm; | |
fe4da5cc | 1575 | } |
75e0cc59 | 1576 | Double_t AliGenMUONlib::YCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1577 | { |
1578 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1579 | // YCharmFiMjSkPP = YCharmF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
1580 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1581 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1582 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1583 | // calculations for the following inputs: | |
1584 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
1585 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
1586 | // for j=0,1 & 2 respectively; | |
1587 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1588 | // with a/b = 1/1,1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1589 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1590 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1591 | // June 2008, Smbat.Grigoryan@cern.ch | |
1592 | ||
1593 | // Charm y | |
1594 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
1595 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
1596 | // Corresponding NLO total cross section is 5.68 mb | |
1597 | ||
1598 | Double_t x=px[0]; | |
1599 | Double_t c[2]={7.0909e-03,6.1967e-05}; | |
1600 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1601 | Double_t ycharm; | |
1602 | ||
1603 | if (TMath::Abs(x)>9) { | |
1604 | ycharm=0.; | |
1605 | } | |
1606 | else { | |
1607 | ycharm=TMath::Power(y,3); | |
1608 | } | |
1609 | ||
1610 | return ycharm; | |
1611 | } | |
75e0cc59 | 1612 | Double_t AliGenMUONlib::YCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1613 | { |
1614 | // Charm y | |
1615 | // Corresponding NLO total cross section is 6.06 mb | |
1616 | Double_t x=px[0]; | |
1617 | Double_t c[2]={6.9707e-03,6.0971e-05}; | |
1618 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1619 | Double_t ycharm; | |
1620 | ||
1621 | if (TMath::Abs(x)>9) { | |
1622 | ycharm=0.; | |
1623 | } | |
1624 | else { | |
1625 | ycharm=TMath::Power(y,3); | |
1626 | } | |
1627 | ||
1628 | return ycharm; | |
1629 | } | |
75e0cc59 | 1630 | Double_t AliGenMUONlib::YCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1631 | { |
1632 | // Charm y | |
1633 | // Corresponding NLO total cross section is 6.06 mb | |
1634 | Double_t x=px[0]; | |
1635 | Double_t c[2]={7.1687e-03,6.5303e-05}; | |
1636 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1637 | Double_t ycharm; | |
1638 | ||
1639 | if (TMath::Abs(x)>9) { | |
1640 | ycharm=0.; | |
1641 | } | |
1642 | else { | |
1643 | ycharm=TMath::Power(y,3); | |
1644 | } | |
1645 | ||
1646 | return ycharm; | |
1647 | } | |
75e0cc59 | 1648 | Double_t AliGenMUONlib::YCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1649 | { |
1650 | // Charm y | |
1651 | // Corresponding NLO total cross section is 7.69 mb | |
1652 | Double_t x=px[0]; | |
1653 | Double_t c[2]={5.9090e-03,7.1854e-05}; | |
1654 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1655 | Double_t ycharm; | |
1656 | ||
1657 | if (TMath::Abs(x)>9) { | |
1658 | ycharm=0.; | |
1659 | } | |
1660 | else { | |
1661 | ycharm=TMath::Power(y,3); | |
1662 | } | |
1663 | ||
1664 | return ycharm; | |
1665 | } | |
75e0cc59 | 1666 | Double_t AliGenMUONlib::YCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1667 | { |
1668 | // Charm y | |
1669 | // Corresponding NLO total cross section is 4.81 mb | |
1670 | Double_t x=px[0]; | |
1671 | Double_t c[2]={8.0882e-03,5.5872e-05}; | |
1672 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1673 | Double_t ycharm; | |
1674 | ||
1675 | if (TMath::Abs(x)>9) { | |
1676 | ycharm=0.; | |
1677 | } | |
1678 | else { | |
1679 | ycharm=TMath::Power(y,3); | |
1680 | } | |
1681 | ||
1682 | return ycharm; | |
1683 | } | |
75e0cc59 | 1684 | Double_t AliGenMUONlib::YCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1685 | { |
1686 | // Charm y | |
1687 | // Corresponding NLO total cross section is 14.09 mb | |
1688 | Double_t x=px[0]; | |
1689 | Double_t c[2]={7.2520e-03,6.2691e-05}; | |
1690 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1691 | Double_t ycharm; | |
1692 | ||
1693 | if (TMath::Abs(x)>9) { | |
1694 | ycharm=0.; | |
1695 | } | |
1696 | else { | |
1697 | ycharm=TMath::Power(y,3); | |
1698 | } | |
1699 | ||
1700 | return ycharm; | |
1701 | } | |
75e0cc59 | 1702 | Double_t AliGenMUONlib::YCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1703 | { |
1704 | // Charm y | |
1705 | // Corresponding NLO total cross section is 1.52 mb | |
1706 | Double_t x=px[0]; | |
1707 | Double_t c[2]={1.1040e-04,1.4498e-04}; | |
1708 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1709 | Double_t ycharm; | |
1710 | ||
1711 | if (TMath::Abs(x)>9) { | |
1712 | ycharm=0.; | |
1713 | } | |
1714 | else { | |
1715 | ycharm=TMath::Power(y,3); | |
1716 | } | |
1717 | ||
1718 | return ycharm; | |
1719 | } | |
75e0cc59 | 1720 | Double_t AliGenMUONlib::YCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1721 | { |
1722 | // Charm y | |
1723 | // Corresponding NLO total cross section is 3.67 mb | |
1724 | Double_t x=px[0]; | |
1725 | Double_t c[2]={-3.1328e-03,1.8270e-04}; | |
1726 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1727 | Double_t ycharm; | |
1728 | ||
1729 | if (TMath::Abs(x)>9) { | |
1730 | ycharm=0.; | |
1731 | } | |
1732 | else { | |
1733 | ycharm=TMath::Power(y,3); | |
1734 | } | |
1735 | ||
1736 | return ycharm; | |
1737 | } | |
75e0cc59 | 1738 | Double_t AliGenMUONlib::YCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1739 | { |
1740 | // Charm y | |
1741 | // Corresponding NLO total cross section is 3.38 mb | |
1742 | Double_t x=px[0]; | |
1743 | Double_t c[2]={7.0865e-03,6.2532e-05}; | |
1744 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1745 | Double_t ycharm; | |
1746 | ||
1747 | if (TMath::Abs(x)>9) { | |
1748 | ycharm=0.; | |
1749 | } | |
1750 | else { | |
1751 | ycharm=TMath::Power(y,3); | |
1752 | } | |
1753 | ||
1754 | return ycharm; | |
1755 | } | |
75e0cc59 | 1756 | Double_t AliGenMUONlib::YCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1757 | { |
1758 | // Charm y | |
1759 | // Corresponding NLO total cross section is 10.37 mb | |
1760 | Double_t x=px[0]; | |
1761 | Double_t c[2]={7.7070e-03,5.3533e-05}; | |
1762 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1763 | Double_t ycharm; | |
1764 | ||
1765 | if (TMath::Abs(x)>9) { | |
1766 | ycharm=0.; | |
1767 | } | |
1768 | else { | |
1769 | ycharm=TMath::Power(y,3); | |
1770 | } | |
1771 | ||
1772 | return ycharm; | |
1773 | } | |
75e0cc59 | 1774 | Double_t AliGenMUONlib::YCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1775 | { |
1776 | // Charm y | |
1777 | // Corresponding NLO total cross section is 7.22 mb | |
1778 | Double_t x=px[0]; | |
1779 | Double_t c[2]={7.9195e-03,5.3823e-05}; | |
1780 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1781 | Double_t ycharm; | |
1782 | ||
1783 | if (TMath::Abs(x)>9) { | |
1784 | ycharm=0.; | |
1785 | } | |
1786 | else { | |
1787 | ycharm=TMath::Power(y,3); | |
1788 | } | |
1789 | ||
1790 | return ycharm; | |
1791 | } | |
fe4da5cc | 1792 | |
ec772ba2 | 1793 | |
65fb704d | 1794 | Int_t AliGenMUONlib::IpCharm(TRandom *ran) |
fe4da5cc | 1795 | { |
d90f80fd | 1796 | // Charm composition |
65fb704d | 1797 | Float_t random; |
fe4da5cc | 1798 | Int_t ip; |
1799 | // 411,421,431,4122 | |
65fb704d | 1800 | random = ran->Rndm(); |
ec772ba2 | 1801 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 |
1802 | // >>>>> cf. tab 4 p 11 | |
1803 | ||
1804 | if (random < 0.30) { | |
1805 | ip=421; | |
1806 | } else if (random < 0.60) { | |
1807 | ip=-421; | |
1808 | } else if (random < 0.70) { | |
1809 | ip=411; | |
1810 | } else if (random < 0.80) { | |
1811 | ip=-411; | |
1812 | } else if (random < 0.86) { | |
1813 | ip=431; | |
1814 | } else if (random < 0.92) { | |
1815 | ip=-431; | |
1816 | } else if (random < 0.96) { | |
1817 | ip=4122; | |
fe4da5cc | 1818 | } else { |
ec772ba2 | 1819 | ip=-4122; |
fe4da5cc | 1820 | } |
fe4da5cc | 1821 | |
1822 | return ip; | |
1823 | } | |
1824 | ||
fe4da5cc | 1825 | // |
1826 | // Beauty | |
1827 | // | |
1828 | // | |
1829 | // pt-distribution | |
1830 | //____________________________________________________________ | |
75e0cc59 | 1831 | Double_t AliGenMUONlib::PtBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1832 | { |
d90f80fd | 1833 | // Beauty pT |
bd0276a8 | 1834 | const Double_t kpt0 = 6.53; |
1835 | const Double_t kxn = 3.59; | |
1836 | Double_t x=*px; | |
1837 | // | |
1838 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1839 | return x/TMath::Power(pass1,kxn); | |
1840 | } | |
1841 | ||
75e0cc59 | 1842 | Double_t AliGenMUONlib::PtBeautyCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 1843 | { |
1844 | // Beauty pT | |
1845 | const Double_t kpt0 = 6.14; | |
1846 | const Double_t kxn = 2.93; | |
fe4da5cc | 1847 | Double_t x=*px; |
1848 | // | |
d90f80fd | 1849 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
1850 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 1851 | } |
75e0cc59 | 1852 | Double_t AliGenMUONlib::PtBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1853 | { |
1854 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1855 | // PtBeautyFiMjSkPP = PtBeautyF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
1856 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1857 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1858 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1859 | // calculations for the following inputs: | |
1860 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
1861 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
1862 | // for j=0,1 & 2 respectively; | |
1863 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1864 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1865 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1866 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1867 | // June 2008, Smbat.Grigoryan@cern.ch | |
1868 | ||
1869 | // Beauty pT | |
1870 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
1871 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
1872 | // Corresponding NLO total cross section is 0.494 mb | |
1873 | ||
1874 | const Double_t kpt0 = 8.0575; | |
1875 | const Double_t kxn = 3.1921; | |
1876 | Double_t x=*px; | |
1877 | // | |
1878 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1879 | return x/TMath::Power(pass1,kxn); | |
1880 | } | |
75e0cc59 | 1881 | Double_t AliGenMUONlib::PtBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1882 | { |
1883 | // Beauty pT | |
1884 | // Corresponding NLO total cross section is 0.445 mb | |
1885 | const Double_t kpt0 = 8.6239; | |
1886 | const Double_t kxn = 3.2911; | |
1887 | Double_t x=*px; | |
1888 | // | |
1889 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1890 | return x/TMath::Power(pass1,kxn); | |
1891 | } | |
75e0cc59 | 1892 | Double_t AliGenMUONlib::PtBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1893 | { |
1894 | // Beauty pT | |
1895 | // Corresponding NLO total cross section is 0.445 mb | |
1896 | const Double_t kpt0 = 7.3367; | |
1897 | const Double_t kxn = 3.0692; | |
1898 | Double_t x=*px; | |
1899 | // | |
1900 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1901 | return x/TMath::Power(pass1,kxn); | |
1902 | } | |
75e0cc59 | 1903 | Double_t AliGenMUONlib::PtBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1904 | { |
1905 | // Beauty pT | |
1906 | // Corresponding NLO total cross section is 0.518 mb | |
1907 | const Double_t kpt0 = 7.6409; | |
1908 | const Double_t kxn = 3.1364; | |
1909 | Double_t x=*px; | |
1910 | // | |
1911 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1912 | return x/TMath::Power(pass1,kxn); | |
1913 | } | |
75e0cc59 | 1914 | Double_t AliGenMUONlib::PtBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1915 | { |
1916 | // Beauty pT | |
1917 | // Corresponding NLO total cross section is 0.384 mb | |
1918 | const Double_t kpt0 = 8.4948; | |
1919 | const Double_t kxn = 3.2546; | |
1920 | Double_t x=*px; | |
1921 | // | |
1922 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1923 | return x/TMath::Power(pass1,kxn); | |
1924 | } | |
75e0cc59 | 1925 | Double_t AliGenMUONlib::PtBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1926 | { |
1927 | // Beauty pT | |
1928 | // Corresponding NLO total cross section is 0.648 mb | |
1929 | const Double_t kpt0 = 7.6631; | |
1930 | const Double_t kxn = 3.1621; | |
1931 | Double_t x=*px; | |
1932 | // | |
1933 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1934 | return x/TMath::Power(pass1,kxn); | |
1935 | } | |
75e0cc59 | 1936 | Double_t AliGenMUONlib::PtBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1937 | { |
1938 | // Beauty pT | |
1939 | // Corresponding NLO total cross section is 0.294 mb | |
1940 | const Double_t kpt0 = 8.7245; | |
1941 | const Double_t kxn = 3.2213; | |
1942 | Double_t x=*px; | |
1943 | // | |
1944 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1945 | return x/TMath::Power(pass1,kxn); | |
1946 | } | |
75e0cc59 | 1947 | Double_t AliGenMUONlib::PtBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1948 | { |
1949 | // Beauty pT | |
1950 | // Corresponding NLO total cross section is 0.475 mb | |
1951 | const Double_t kpt0 = 8.5296; | |
1952 | const Double_t kxn = 3.2187; | |
1953 | Double_t x=*px; | |
1954 | // | |
1955 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1956 | return x/TMath::Power(pass1,kxn); | |
1957 | } | |
75e0cc59 | 1958 | Double_t AliGenMUONlib::PtBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1959 | { |
1960 | // Beauty pT | |
1961 | // Corresponding NLO total cross section is 0.324 mb | |
1962 | const Double_t kpt0 = 7.9440; | |
1963 | const Double_t kxn = 3.1614; | |
1964 | Double_t x=*px; | |
1965 | // | |
1966 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1967 | return x/TMath::Power(pass1,kxn); | |
1968 | } | |
75e0cc59 | 1969 | Double_t AliGenMUONlib::PtBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1970 | { |
1971 | // Beauty pT | |
1972 | // Corresponding NLO total cross section is 0.536 mb | |
1973 | const Double_t kpt0 = 8.2408; | |
1974 | const Double_t kxn = 3.3029; | |
1975 | Double_t x=*px; | |
1976 | // | |
1977 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1978 | return x/TMath::Power(pass1,kxn); | |
1979 | } | |
75e0cc59 | 1980 | Double_t AliGenMUONlib::PtBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1981 | { |
1982 | // Beauty pT | |
1983 | // Corresponding NLO total cross section is 0.420 mb | |
1984 | const Double_t kpt0 = 7.8041; | |
1985 | const Double_t kxn = 3.2094; | |
1986 | Double_t x=*px; | |
1987 | // | |
1988 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1989 | return x/TMath::Power(pass1,kxn); | |
1990 | } | |
1991 | ||
fe4da5cc | 1992 | // y-distribution |
75e0cc59 | 1993 | Double_t AliGenMUONlib::YBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1994 | { |
ec772ba2 | 1995 | // Beauty y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
1996 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
1997 | // shadowing + kt broadening | |
1998 | ||
1999 | Double_t x=px[0]; | |
2000 | Double_t c[2]={-1.27590e-02,-2.42731e-04}; | |
2001 | Double_t y=1+c[0]*TMath::Power(x,2)+c[1]*TMath::Power(x,4); | |
2002 | Double_t ybeauty; | |
2003 | ||
2004 | if (TMath::Abs(x)>6) { | |
2005 | ybeauty=0.; | |
2006 | } | |
2007 | else { | |
2008 | ybeauty=TMath::Power(y,3); | |
2009 | } | |
2010 | ||
2011 | return ybeauty; | |
fe4da5cc | 2012 | } |
75e0cc59 | 2013 | Double_t AliGenMUONlib::YBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2014 | { |
2015 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
2016 | // YBeautyFiMjSkPP = YBeautyF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
2017 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
2018 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
2019 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
2020 | // calculations for the following inputs: | |
2021 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
2022 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
2023 | // for j=0,1 & 2 respectively; | |
2024 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
2025 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
2026 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
2027 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
2028 | // June 2008, Smbat.Grigoryan@cern.ch | |
2029 | ||
2030 | // Beauty y | |
2031 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
2032 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
2033 | // Corresponding NLO total cross section is 0.494 mb | |
2034 | ||
fe4da5cc | 2035 | |
9e9ae065 | 2036 | Double_t x=px[0]; |
2037 | Double_t c[2]={1.2350e-02,9.2667e-05}; | |
2038 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2039 | Double_t ybeauty; | |
2040 | ||
2041 | if (TMath::Abs(x)>7.6) { | |
2042 | ybeauty=0.; | |
2043 | } | |
2044 | else { | |
2045 | ybeauty=TMath::Power(y,3); | |
2046 | } | |
2047 | ||
2048 | return ybeauty; | |
2049 | } | |
75e0cc59 | 2050 | Double_t AliGenMUONlib::YBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2051 | { |
2052 | // Beauty y | |
2053 | // Corresponding NLO total cross section is 0.445 mb | |
2054 | Double_t x=px[0]; | |
2055 | Double_t c[2]={1.2292e-02,9.1847e-05}; | |
2056 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2057 | Double_t ybeauty; | |
2058 | ||
2059 | if (TMath::Abs(x)>7.6) { | |
2060 | ybeauty=0.; | |
2061 | } | |
2062 | else { | |
2063 | ybeauty=TMath::Power(y,3); | |
2064 | } | |
2065 | ||
2066 | return ybeauty; | |
2067 | } | |
75e0cc59 | 2068 | Double_t AliGenMUONlib::YBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2069 | { |
2070 | // Beauty y | |
2071 | // Corresponding NLO total cross section is 0.445 mb | |
2072 | Double_t x=px[0]; | |
2073 | Double_t c[2]={1.2436e-02,9.3709e-05}; | |
2074 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2075 | Double_t ybeauty; | |
2076 | ||
2077 | if (TMath::Abs(x)>7.6) { | |
2078 | ybeauty=0.; | |
2079 | } | |
2080 | else { | |
2081 | ybeauty=TMath::Power(y,3); | |
2082 | } | |
2083 | ||
2084 | return ybeauty; | |
2085 | } | |
75e0cc59 | 2086 | Double_t AliGenMUONlib::YBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2087 | { |
2088 | // Beauty y | |
2089 | // Corresponding NLO total cross section is 0.518 mb | |
2090 | Double_t x=px[0]; | |
2091 | Double_t c[2]={1.1714e-02,1.0068e-04}; | |
2092 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2093 | Double_t ybeauty; | |
2094 | ||
2095 | if (TMath::Abs(x)>7.6) { | |
2096 | ybeauty=0.; | |
2097 | } | |
2098 | else { | |
2099 | ybeauty=TMath::Power(y,3); | |
2100 | } | |
2101 | ||
2102 | return ybeauty; | |
2103 | } | |
75e0cc59 | 2104 | Double_t AliGenMUONlib::YBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2105 | { |
2106 | // Beauty y | |
2107 | // Corresponding NLO total cross section is 0.384 mb | |
2108 | Double_t x=px[0]; | |
2109 | Double_t c[2]={1.2944e-02,8.5500e-05}; | |
2110 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2111 | Double_t ybeauty; | |
2112 | ||
2113 | if (TMath::Abs(x)>7.6) { | |
2114 | ybeauty=0.; | |
2115 | } | |
2116 | else { | |
2117 | ybeauty=TMath::Power(y,3); | |
2118 | } | |
2119 | ||
2120 | return ybeauty; | |
2121 | } | |
75e0cc59 | 2122 | Double_t AliGenMUONlib::YBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2123 | { |
2124 | // Beauty y | |
2125 | // Corresponding NLO total cross section is 0.648 mb | |
2126 | Double_t x=px[0]; | |
2127 | Double_t c[2]={1.2455e-02,9.2713e-05}; | |
2128 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2129 | Double_t ybeauty; | |
2130 | ||
2131 | if (TMath::Abs(x)>7.6) { | |
2132 | ybeauty=0.; | |
2133 | } | |
2134 | else { | |
2135 | ybeauty=TMath::Power(y,3); | |
2136 | } | |
2137 | ||
2138 | return ybeauty; | |
2139 | } | |
75e0cc59 | 2140 | Double_t AliGenMUONlib::YBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2141 | { |
2142 | // Beauty y | |
2143 | // Corresponding NLO total cross section is 0.294 mb | |
2144 | Double_t x=px[0]; | |
2145 | Double_t c[2]={1.0897e-02,1.1878e-04}; | |
2146 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2147 | Double_t ybeauty; | |
2148 | ||
2149 | if (TMath::Abs(x)>7.6) { | |
2150 | ybeauty=0.; | |
2151 | } | |
2152 | else { | |
2153 | ybeauty=TMath::Power(y,3); | |
2154 | } | |
2155 | ||
2156 | return ybeauty; | |
2157 | } | |
75e0cc59 | 2158 | Double_t AliGenMUONlib::YBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2159 | { |
2160 | // Beauty y | |
2161 | // Corresponding NLO total cross section is 0.475 mb | |
2162 | Double_t x=px[0]; | |
2163 | Double_t c[2]={1.0912e-02,1.1858e-04}; | |
2164 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2165 | Double_t ybeauty; | |
2166 | ||
2167 | if (TMath::Abs(x)>7.6) { | |
2168 | ybeauty=0.; | |
2169 | } | |
2170 | else { | |
2171 | ybeauty=TMath::Power(y,3); | |
2172 | } | |
2173 | ||
2174 | return ybeauty; | |
2175 | } | |
75e0cc59 | 2176 | Double_t AliGenMUONlib::YBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2177 | { |
2178 | // Beauty y | |
2179 | // Corresponding NLO total cross section is 0.324 mb | |
2180 | Double_t x=px[0]; | |
2181 | Double_t c[2]={1.2378e-02,9.2490e-05}; | |
2182 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2183 | Double_t ybeauty; | |
2184 | ||
2185 | if (TMath::Abs(x)>7.6) { | |
2186 | ybeauty=0.; | |
2187 | } | |
2188 | else { | |
2189 | ybeauty=TMath::Power(y,3); | |
2190 | } | |
2191 | ||
2192 | return ybeauty; | |
2193 | } | |
75e0cc59 | 2194 | Double_t AliGenMUONlib::YBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2195 | { |
2196 | // Beauty y | |
2197 | // Corresponding NLO total cross section is 0.536 mb | |
2198 | Double_t x=px[0]; | |
2199 | Double_t c[2]={1.2886e-02,8.2912e-05}; | |
2200 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2201 | Double_t ybeauty; | |
2202 | ||
2203 | if (TMath::Abs(x)>7.6) { | |
2204 | ybeauty=0.; | |
2205 | } | |
2206 | else { | |
2207 | ybeauty=TMath::Power(y,3); | |
2208 | } | |
2209 | ||
2210 | return ybeauty; | |
2211 | } | |
75e0cc59 | 2212 | Double_t AliGenMUONlib::YBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2213 | { |
2214 | // Beauty y | |
2215 | // Corresponding NLO total cross section is 0.420 mb | |
2216 | Double_t x=px[0]; | |
2217 | Double_t c[2]={1.3106e-02,8.0115e-05}; | |
2218 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2219 | Double_t ybeauty; | |
2220 | ||
2221 | if (TMath::Abs(x)>7.6) { | |
2222 | ybeauty=0.; | |
2223 | } | |
2224 | else { | |
2225 | ybeauty=TMath::Power(y,3); | |
2226 | } | |
2227 | ||
2228 | return ybeauty; | |
2229 | } | |
ec772ba2 | 2230 | |
65fb704d | 2231 | Int_t AliGenMUONlib::IpBeauty(TRandom *ran) |
fe4da5cc | 2232 | { |
d90f80fd | 2233 | // Beauty Composition |
65fb704d | 2234 | Float_t random; |
fe4da5cc | 2235 | Int_t ip; |
ec772ba2 | 2236 | random = ran->Rndm(); |
2237 | ||
2238 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 | |
2239 | // >>>>> cf. tab 4 p 11 | |
2240 | ||
2241 | if (random < 0.20) { | |
2242 | ip=511; | |
2243 | } else if (random < 0.40) { | |
2244 | ip=-511; | |
2245 | } else if (random < 0.605) { | |
2246 | ip=521; | |
2247 | } else if (random < 0.81) { | |
2248 | ip=-521; | |
2249 | } else if (random < 0.87) { | |
2250 | ip=531; | |
2251 | } else if (random < 0.93) { | |
2252 | ip=-531; | |
2253 | } else if (random < 0.965) { | |
2254 | ip=5122; | |
fe4da5cc | 2255 | } else { |
ec772ba2 | 2256 | ip=-5122; |
fe4da5cc | 2257 | } |
fe4da5cc | 2258 | |
ec772ba2 | 2259 | return ip; |
fe4da5cc | 2260 | } |
2261 | ||
ec772ba2 | 2262 | |
75e0cc59 | 2263 | typedef Double_t (*GenFunc) (const Double_t*, const Double_t*); |
53904666 | 2264 | GenFunc AliGenMUONlib::GetPt(Int_t param, const char* tname) const |
fe4da5cc | 2265 | { |
d90f80fd | 2266 | // Return pointer to pT parameterisation |
05932df6 | 2267 | TString sname = TString(tname); |
fe4da5cc | 2268 | GenFunc func; |
753690b0 | 2269 | switch (param) |
fe4da5cc | 2270 | { |
34f60c01 | 2271 | case kPhi: |
fe4da5cc | 2272 | func=PtPhi; |
2273 | break; | |
89512a3b | 2274 | case kOmega: |
2275 | func=PtOmega; | |
2276 | break; | |
2277 | case kEta: | |
2278 | func=PtEta; | |
2279 | break; | |
0ad09590 | 2280 | case kJpsiFamily: |
88e5db43 | 2281 | case kPsiP: |
ba8bf3f5 | 2282 | case kChic1: |
2283 | case kChic2: | |
34f60c01 | 2284 | case kJpsi: |
bb6e81ac | 2285 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2286 | func=PtJpsiPbPb; |
bb6e81ac | 2287 | } else if (sname == "Vogt pp") { |
2288 | func=PtJpsiPP; | |
a4f206bf | 2289 | } else if (sname == "pp 7") { |
2290 | func=PtJpsiPP7000; | |
2291 | } else if (sname == "pp 2.76") { | |
2292 | func=PtJpsiPP2760; | |
2293 | } else if (sname == "PbPb 2.76") { | |
2294 | func=PtJpsiPbPb2760; | |
0e137c25 | 2295 | } else if (sname == "CDF scaled") { |
2296 | func=PtJpsiCDFscaled; | |
9ff13849 | 2297 | } else if (sname == "CDF pp") { |
2298 | func=PtJpsiCDFscaledPP; | |
9e9ae065 | 2299 | } else if (sname == "CDF pp 10") { |
2300 | func=PtJpsiCDFscaledPP10; | |
9fd56238 | 2301 | } else if (sname == "CDF pp 8.8") { |
2302 | func=PtJpsiCDFscaledPP9; | |
94a2994d | 2303 | } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat y") { |
9fd56238 | 2304 | func=PtJpsiCDFscaledPP7; |
2305 | } else if (sname == "CDF pp 3.94") { | |
2306 | func=PtJpsiCDFscaledPP4; | |
a4f206bf | 2307 | } else if (sname == "CDF pp 2.76") { |
2308 | func=PtJpsiCDFscaledPP3; | |
2309 | } else if (sname == "CDF pp 1.9") { | |
2310 | func=PtJpsiCDFscaledPP2; | |
9fd56238 | 2311 | } else if (sname == "CDF pPb 8.8") { |
2312 | func=PtJpsiCDFscaledPPb9; | |
2313 | } else if (sname == "CDF Pbp 8.8") { | |
2314 | func=PtJpsiCDFscaledPbP9; | |
2315 | } else if (sname == "CDF PbPb 3.94") { | |
2316 | func=PtJpsiCDFscaledPbPb4; | |
94a2994d | 2317 | } else if (sname == "Flat" || sname == "CDF pp 7 flat pt") { |
4ca8d070 | 2318 | func=PtJpsiFlat; |
05932df6 | 2319 | } else { |
2320 | func=PtJpsi; | |
2321 | } | |
fe4da5cc | 2322 | break; |
17d28ba5 | 2323 | case kJpsiFromB: |
2324 | func = PtJpsiBPbPb; | |
2325 | break; | |
0ad09590 | 2326 | case kUpsilonFamily: |
88e5db43 | 2327 | case kUpsilonP: |
2328 | case kUpsilonPP: | |
34f60c01 | 2329 | case kUpsilon: |
bb6e81ac | 2330 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2331 | func=PtUpsilonPbPb; |
bb6e81ac | 2332 | } else if (sname == "Vogt pp") { |
2333 | func=PtUpsilonPP; | |
0e137c25 | 2334 | } else if (sname == "CDF scaled") { |
2335 | func=PtUpsilonCDFscaled; | |
9ff13849 | 2336 | } else if (sname == "CDF pp") { |
2337 | func=PtUpsilonCDFscaledPP; | |
b33adf51 | 2338 | } else if (sname == "CDF pp 10") { |
2339 | func=PtUpsilonCDFscaledPP10; | |
9fd56238 | 2340 | } else if (sname == "CDF pp 8.8") { |
2341 | func=PtUpsilonCDFscaledPP9; | |
2342 | } else if (sname == "CDF pp 7") { | |
2343 | func=PtUpsilonCDFscaledPP7; | |
2344 | } else if (sname == "CDF pp 3.94") { | |
2345 | func=PtUpsilonCDFscaledPP4; | |
2346 | } else if (sname == "CDF pPb 8.8") { | |
2347 | func=PtUpsilonCDFscaledPPb9; | |
2348 | } else if (sname == "CDF Pbp 8.8") { | |
2349 | func=PtUpsilonCDFscaledPbP9; | |
2350 | } else if (sname == "CDF PbPb 3.94") { | |
2351 | func=PtUpsilonCDFscaledPbPb4; | |
4ca8d070 | 2352 | } else if (sname == "Flat") { |
2353 | func=PtUpsilonFlat; | |
05932df6 | 2354 | } else { |
2355 | func=PtUpsilon; | |
2356 | } | |
0ad09590 | 2357 | break; |
34f60c01 | 2358 | case kCharm: |
9e9ae065 | 2359 | if (sname == "F0M0S0 pp") { |
2360 | func=PtCharmF0M0S0PP; | |
2361 | } else if (sname == "F1M0S0 pp") { | |
2362 | func=PtCharmF1M0S0PP; | |
2363 | } else if (sname == "F2M0S0 pp") { | |
2364 | func=PtCharmF2M0S0PP; | |
2365 | } else if (sname == "F0M1S0 pp") { | |
2366 | func=PtCharmF0M1S0PP; | |
2367 | } else if (sname == "F0M2S0 pp") { | |
2368 | func=PtCharmF0M2S0PP; | |
2369 | } else if (sname == "F0M0S1 pp") { | |
2370 | func=PtCharmF0M0S1PP; | |
2371 | } else if (sname == "F0M0S2 pp") { | |
2372 | func=PtCharmF0M0S2PP; | |
2373 | } else if (sname == "F0M0S3 pp") { | |
2374 | func=PtCharmF0M0S3PP; | |
2375 | } else if (sname == "F0M0S4 pp") { | |
2376 | func=PtCharmF0M0S4PP; | |
2377 | } else if (sname == "F0M0S5 pp") { | |
2378 | func=PtCharmF0M0S5PP; | |
2379 | } else if (sname == "F0M0S6 pp") { | |
2380 | func=PtCharmF0M0S6PP; | |
2381 | } else if (sname == "central") { | |
bd0276a8 | 2382 | func=PtCharmCentral; |
2383 | } else { | |
2384 | func=PtCharm; | |
2385 | } | |
fe4da5cc | 2386 | break; |
34f60c01 | 2387 | case kBeauty: |
9e9ae065 | 2388 | if (sname == "F0M0S0 pp") { |
2389 | func=PtBeautyF0M0S0PP; | |
2390 | } else if (sname == "F1M0S0 pp") { | |
2391 | func=PtBeautyF1M0S0PP; | |
2392 | } else if (sname == "F2M0S0 pp") { | |
2393 | func=PtBeautyF2M0S0PP; | |
2394 | } else if (sname == "F0M1S0 pp") { | |
2395 | func=PtBeautyF0M1S0PP; | |
2396 | } else if (sname == "F0M2S0 pp") { | |
2397 | func=PtBeautyF0M2S0PP; | |
2398 | } else if (sname == "F0M0S1 pp") { | |
2399 | func=PtBeautyF0M0S1PP; | |
2400 | } else if (sname == "F0M0S2 pp") { | |
2401 | func=PtBeautyF0M0S2PP; | |
2402 | } else if (sname == "F0M0S3 pp") { | |
2403 | func=PtBeautyF0M0S3PP; | |
2404 | } else if (sname == "F0M0S4 pp") { | |
2405 | func=PtBeautyF0M0S4PP; | |
2406 | } else if (sname == "F0M0S5 pp") { | |
2407 | func=PtBeautyF0M0S5PP; | |
2408 | } else if (sname == "F0M0S6 pp") { | |
2409 | func=PtBeautyF0M0S6PP; | |
2410 | } else if (sname == "central") { | |
bd0276a8 | 2411 | func=PtBeautyCentral; |
2412 | } else { | |
2413 | func=PtBeauty; | |
2414 | } | |
fe4da5cc | 2415 | break; |
34f60c01 | 2416 | case kPion: |
f9a1ce31 | 2417 | if (sname == "2010 Pos PP") { |
2418 | func=PtPionPos2010PP; | |
2419 | } else if (sname == "2010 Neg PP") { | |
2420 | func=PtPionNeg2010PP; | |
2421 | } else { | |
2422 | func=PtPion; | |
2423 | } | |
753690b0 | 2424 | break; |
34f60c01 | 2425 | case kKaon: |
f9a1ce31 | 2426 | if (sname == "2010 Pos PP") { |
2427 | func=PtKaonPos2010PP; | |
2428 | } else if (sname == "2010 Neg PP") { | |
2429 | func=PtKaonNeg2010PP; | |
2430 | } else { | |
2431 | func=PtKaon; | |
2432 | } | |
753690b0 | 2433 | break; |
6b450aa0 | 2434 | case kChic0: |
2435 | func=PtChic0; | |
00935af2 | 2436 | break; |
6b450aa0 | 2437 | case kChic: |
2438 | func=PtChic; | |
00935af2 | 2439 | break; |
119b35c7 | 2440 | default: |
2441 | func=0; | |
2442 | printf("<AliGenMUONlib::GetPt> unknown parametrisation\n"); | |
fe4da5cc | 2443 | } |
2444 | return func; | |
2445 | } | |
2446 | ||
53904666 | 2447 | GenFunc AliGenMUONlib::GetY(Int_t param, const char* tname) const |
fe4da5cc | 2448 | { |
ac3faee4 | 2449 | // |
2450 | // Return pointer to y- parameterisation | |
2451 | // | |
05932df6 | 2452 | TString sname = TString(tname); |
fe4da5cc | 2453 | GenFunc func; |
753690b0 | 2454 | switch (param) |
fe4da5cc | 2455 | { |
34f60c01 | 2456 | case kPhi: |
fe4da5cc | 2457 | func=YPhi; |
2458 | break; | |
89512a3b | 2459 | case kEta: |
2460 | func=YEta; | |
2461 | break; | |
2462 | case kOmega: | |
2463 | func=YOmega; | |
2464 | break; | |
0ad09590 | 2465 | case kJpsiFamily: |
88e5db43 | 2466 | case kPsiP: |
ba8bf3f5 | 2467 | case kChic1: |
2468 | case kChic2: | |
34f60c01 | 2469 | case kJpsi: |
bb6e81ac | 2470 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2471 | func=YJpsiPbPb; |
bb6e81ac | 2472 | } else if (sname == "Vogt pp"){ |
2473 | func=YJpsiPP; | |
a4f206bf | 2474 | } else if (sname == "pp 7") { |
2475 | func=YJpsiPP7000; | |
2476 | } else if (sname == "pp 2.76") { | |
2477 | func=YJpsiPP2760; | |
2478 | } else if (sname == "PbPb 2.76") { | |
2479 | func=YJpsiPbPb2760; | |
0e137c25 | 2480 | } else if (sname == "CDF scaled") { |
2481 | func=YJpsiCDFscaled; | |
9ff13849 | 2482 | } else if (sname == "CDF pp") { |
2483 | func=YJpsiCDFscaledPP; | |
9e9ae065 | 2484 | } else if (sname == "CDF pp 10") { |
2485 | func=YJpsiCDFscaledPP10; | |
9fd56238 | 2486 | } else if (sname == "CDF pp 8.8") { |
2487 | func=YJpsiCDFscaledPP9; | |
94a2994d | 2488 | } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat pt") { |
9fd56238 | 2489 | func=YJpsiCDFscaledPP7; |
2490 | } else if (sname == "CDF pp 3.94") { | |
2491 | func=YJpsiCDFscaledPP4; | |
a4f206bf | 2492 | } else if (sname == "CDF pp 2.76") { |
2493 | func=YJpsiCDFscaledPP3; | |
2494 | } else if (sname == "CDF pp 1.9") { | |
2495 | func=YJpsiCDFscaledPP2; | |
9fd56238 | 2496 | } else if (sname == "CDF pPb 8.8") { |
2497 | func=YJpsiCDFscaledPPb9; | |
2498 | } else if (sname == "CDF Pbp 8.8") { | |
2499 | func=YJpsiCDFscaledPbP9; | |
2500 | } else if (sname == "CDF PbPb 3.94") { | |
2501 | func=YJpsiCDFscaledPbPb4; | |
94a2994d | 2502 | } else if (sname == "Flat" || sname == "CDF pp 7 flat y") { |
4ca8d070 | 2503 | func=YJpsiFlat; |
05932df6 | 2504 | } else { |
2505 | func=YJpsi; | |
2506 | } | |
17d28ba5 | 2507 | break; |
2508 | case kJpsiFromB: | |
2509 | func = YJpsiBPbPb; | |
fe4da5cc | 2510 | break; |
0ad09590 | 2511 | case kUpsilonFamily: |
88e5db43 | 2512 | case kUpsilonP: |
2513 | case kUpsilonPP: | |
34f60c01 | 2514 | case kUpsilon: |
bb6e81ac | 2515 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2516 | func=YUpsilonPbPb; |
bb6e81ac | 2517 | } else if (sname == "Vogt pp") { |
2518 | func = YUpsilonPP; | |
0e137c25 | 2519 | } else if (sname == "CDF scaled") { |
2520 | func=YUpsilonCDFscaled; | |
9ff13849 | 2521 | } else if (sname == "CDF pp") { |
2522 | func=YUpsilonCDFscaledPP; | |
b33adf51 | 2523 | } else if (sname == "CDF pp 10") { |
2524 | func=YUpsilonCDFscaledPP10; | |
9fd56238 | 2525 | } else if (sname == "CDF pp 8.8") { |
2526 | func=YUpsilonCDFscaledPP9; | |
2527 | } else if (sname == "CDF pp 7") { | |
2528 | func=YUpsilonCDFscaledPP7; | |
2529 | } else if (sname == "CDF pp 3.94") { | |
2530 | func=YUpsilonCDFscaledPP4; | |
2531 | } else if (sname == "CDF pPb 8.8") { | |
2532 | func=YUpsilonCDFscaledPPb9; | |
2533 | } else if (sname == "CDF Pbp 8.8") { | |
2534 | func=YUpsilonCDFscaledPbP9; | |
2535 | } else if (sname == "CDF PbPb 3.94") { | |
2536 | func=YUpsilonCDFscaledPbPb4; | |
4ca8d070 | 2537 | } else if (sname == "Flat") { |
2538 | func=YUpsilonFlat; | |
05932df6 | 2539 | } else { |
2540 | func=YUpsilon; | |
2541 | } | |
fe4da5cc | 2542 | break; |
34f60c01 | 2543 | case kCharm: |
9e9ae065 | 2544 | if (sname == "F0M0S0 pp") { |
2545 | func=YCharmF0M0S0PP; | |
2546 | } else if (sname == "F1M0S0 pp") { | |
2547 | func=YCharmF1M0S0PP; | |
2548 | } else if (sname == "F2M0S0 pp") { | |
2549 | func=YCharmF2M0S0PP; | |
2550 | } else if (sname == "F0M1S0 pp") { | |
2551 | func=YCharmF0M1S0PP; | |
2552 | } else if (sname == "F0M2S0 pp") { | |
2553 | func=YCharmF0M2S0PP; | |
2554 | } else if (sname == "F0M0S1 pp") { | |
2555 | func=YCharmF0M0S1PP; | |
2556 | } else if (sname == "F0M0S2 pp") { | |
2557 | func=YCharmF0M0S2PP; | |
2558 | } else if (sname == "F0M0S3 pp") { | |
2559 | func=YCharmF0M0S3PP; | |
2560 | } else if (sname == "F0M0S4 pp") { | |
2561 | func=YCharmF0M0S4PP; | |
2562 | } else if (sname == "F0M0S5 pp") { | |
2563 | func=YCharmF0M0S5PP; | |
2564 | } else if (sname == "F0M0S6 pp") { | |
2565 | func=YCharmF0M0S6PP; | |
2566 | } else { | |
2567 | func=YCharm; | |
2568 | } | |
fe4da5cc | 2569 | break; |
34f60c01 | 2570 | case kBeauty: |
9e9ae065 | 2571 | if (sname == "F0M0S0 pp") { |
2572 | func=YBeautyF0M0S0PP; | |
2573 | } else if (sname == "F1M0S0 pp") { | |
2574 | func=YBeautyF1M0S0PP; | |
2575 | } else if (sname == "F2M0S0 pp") { | |
2576 | func=YBeautyF2M0S0PP; | |
2577 | } else if (sname == "F0M1S0 pp") { | |
2578 | func=YBeautyF0M1S0PP; | |
2579 | } else if (sname == "F0M2S0 pp") { | |
2580 | func=YBeautyF0M2S0PP; | |
2581 | } else if (sname == "F0M0S1 pp") { | |
2582 | func=YBeautyF0M0S1PP; | |
2583 | } else if (sname == "F0M0S2 pp") { | |
2584 | func=YBeautyF0M0S2PP; | |
2585 | } else if (sname == "F0M0S3 pp") { | |
2586 | func=YBeautyF0M0S3PP; | |
2587 | } else if (sname == "F0M0S4 pp") { | |
2588 | func=YBeautyF0M0S4PP; | |
2589 | } else if (sname == "F0M0S5 pp") { | |
2590 | func=YBeautyF0M0S5PP; | |
2591 | } else if (sname == "F0M0S6 pp") { | |
2592 | func=YBeautyF0M0S6PP; | |
2593 | } else { | |
2594 | func=YBeauty; | |
2595 | } | |
fe4da5cc | 2596 | break; |
34f60c01 | 2597 | case kPion: |
f9a1ce31 | 2598 | if (sname == "2010 Pos PP") { |
2599 | func=YKaonPion2010PP; | |
2600 | } else if (sname == "2010 Neg PP") { | |
2601 | func=YKaonPion2010PP; | |
2602 | } else { | |
2603 | func=YPion; | |
2604 | } | |
753690b0 | 2605 | break; |
34f60c01 | 2606 | case kKaon: |
f9a1ce31 | 2607 | if (sname == "2010 Pos PP") { |
2608 | func=YKaonPion2010PP; | |
2609 | } else if (sname == "2010 Neg PP") { | |
2610 | func=YKaonPion2010PP; | |
2611 | } else { | |
2612 | func=YKaon; | |
2613 | } | |
753690b0 | 2614 | break; |
6b450aa0 | 2615 | case kChic0: |
2616 | func=YChic0; | |
00935af2 | 2617 | break; |
6b450aa0 | 2618 | case kChic: |
2619 | func=YChic; | |
00935af2 | 2620 | break; |
119b35c7 | 2621 | default: |
2622 | func=0; | |
2623 | printf("<AliGenMUONlib::GetY> unknown parametrisation\n"); | |
fe4da5cc | 2624 | } |
2625 | return func; | |
2626 | } | |
00935af2 | 2627 | |
2628 | // | |
2629 | // Chi | |
2630 | // | |
2631 | // | |
2632 | // pt-distribution | |
2633 | //____________________________________________________________ | |
75e0cc59 | 2634 | Double_t AliGenMUONlib::PtChic0( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2635 | { |
2636 | // Chi_c1 pT | |
2637 | const Double_t kpt0 = 4.; | |
2638 | const Double_t kxn = 3.6; | |
2639 | Double_t x=*px; | |
2640 | // | |
2641 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2642 | return x/TMath::Power(pass1,kxn); | |
2643 | } | |
75e0cc59 | 2644 | Double_t AliGenMUONlib::PtChic1( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2645 | { |
2646 | // Chi_c1 pT | |
2647 | const Double_t kpt0 = 4.; | |
2648 | const Double_t kxn = 3.6; | |
2649 | Double_t x=*px; | |
2650 | // | |
2651 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2652 | return x/TMath::Power(pass1,kxn); | |
2653 | } | |
75e0cc59 | 2654 | Double_t AliGenMUONlib::PtChic2( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2655 | { |
2656 | // Chi_c2 pT | |
2657 | const Double_t kpt0 = 4.; | |
2658 | const Double_t kxn = 3.6; | |
2659 | Double_t x=*px; | |
2660 | // | |
2661 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2662 | return x/TMath::Power(pass1,kxn); | |
2663 | } | |
75e0cc59 | 2664 | Double_t AliGenMUONlib::PtChic( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2665 | { |
2666 | // Chi_c family pT | |
2667 | const Double_t kpt0 = 4.; | |
2668 | const Double_t kxn = 3.6; | |
2669 | Double_t x=*px; | |
2670 | // | |
2671 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2672 | return x/TMath::Power(pass1,kxn); | |
2673 | } | |
2674 | ||
2675 | // | |
2676 | // y-distribution | |
2677 | //____________________________________________________________ | |
75e0cc59 | 2678 | Double_t AliGenMUONlib::YChic0(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2679 | { |
2680 | // Chi-1c y | |
2681 | const Double_t ky0 = 4.; | |
2682 | const Double_t kb=1.; | |
2683 | Double_t yj; | |
2684 | Double_t y=TMath::Abs(*py); | |
2685 | // | |
2686 | if (y < ky0) | |
2687 | yj=kb; | |
2688 | else | |
2689 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2690 | return yj; | |
2691 | } | |
2692 | ||
75e0cc59 | 2693 | Double_t AliGenMUONlib::YChic1(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2694 | { |
2695 | // Chi-1c y | |
2696 | const Double_t ky0 = 4.; | |
2697 | const Double_t kb=1.; | |
2698 | Double_t yj; | |
2699 | Double_t y=TMath::Abs(*py); | |
2700 | // | |
2701 | if (y < ky0) | |
2702 | yj=kb; | |
2703 | else | |
2704 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2705 | return yj; | |
2706 | } | |
2707 | ||
75e0cc59 | 2708 | Double_t AliGenMUONlib::YChic2(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2709 | { |
2710 | // Chi-2c y | |
2711 | const Double_t ky0 = 4.; | |
2712 | const Double_t kb=1.; | |
2713 | Double_t yj; | |
2714 | Double_t y=TMath::Abs(*py); | |
2715 | // | |
2716 | if (y < ky0) | |
2717 | yj=kb; | |
2718 | else | |
2719 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2720 | return yj; | |
2721 | } | |
2722 | ||
75e0cc59 | 2723 | Double_t AliGenMUONlib::YChic(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2724 | { |
2725 | // Chi_c family y | |
2726 | const Double_t ky0 = 4.; | |
2727 | const Double_t kb=1.; | |
2728 | Double_t yj; | |
2729 | Double_t y=TMath::Abs(*py); | |
2730 | // | |
2731 | if (y < ky0) | |
2732 | yj=kb; | |
2733 | else | |
2734 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2735 | return yj; | |
2736 | } | |
2737 | ||
2738 | // particle composition | |
2739 | // | |
6b450aa0 | 2740 | Int_t AliGenMUONlib::IpChic0(TRandom *) |
00935af2 | 2741 | { |
2742 | // Chi composition | |
2743 | return 10441; | |
2744 | } | |
2745 | // | |
6b450aa0 | 2746 | Int_t AliGenMUONlib::IpChic1(TRandom *) |
00935af2 | 2747 | { |
2748 | // Chi composition | |
2749 | return 20443; | |
2750 | } | |
6b450aa0 | 2751 | Int_t AliGenMUONlib::IpChic2(TRandom *) |
00935af2 | 2752 | { |
2753 | // Chi_c2 prime composition | |
2754 | return 445; | |
2755 | } | |
6b450aa0 | 2756 | Int_t AliGenMUONlib::IpChic(TRandom *) |
00935af2 | 2757 | { |
2758 | // Chi composition | |
2759 | Int_t ip; | |
2760 | Float_t r = gRandom->Rndm(); | |
2761 | if (r < 0.001) { | |
2762 | ip = 10441; | |
2763 | } else if( r < 0.377 ) { | |
2764 | ip = 20443; | |
2765 | } else { | |
2766 | ip = 445; | |
2767 | } | |
2768 | return ip; | |
2769 | } | |
2770 | ||
2771 | ||
2772 | //_____________________________________________________________ | |
2773 | ||
65fb704d | 2774 | typedef Int_t (*GenFuncIp) (TRandom *); |
f9a1ce31 | 2775 | GenFuncIp AliGenMUONlib::GetIp(Int_t param, const char* tname) const |
fe4da5cc | 2776 | { |
d90f80fd | 2777 | // Return pointer to particle type parameterisation |
f9a1ce31 | 2778 | TString sname = TString(tname); |
fe4da5cc | 2779 | GenFuncIp func; |
753690b0 | 2780 | switch (param) |
fe4da5cc | 2781 | { |
34f60c01 | 2782 | case kPhi: |
fe4da5cc | 2783 | func=IpPhi; |
2784 | break; | |
89512a3b | 2785 | case kEta: |
2786 | func=IpEta; | |
2787 | break; | |
2788 | case kOmega: | |
2789 | func=IpOmega; | |
2790 | break; | |
0ad09590 | 2791 | case kJpsiFamily: |
2792 | func=IpJpsiFamily; | |
2793 | break; | |
88e5db43 | 2794 | case kPsiP: |
2795 | func=IpPsiP; | |
2796 | break; | |
34f60c01 | 2797 | case kJpsi: |
17d28ba5 | 2798 | case kJpsiFromB: |
fe4da5cc | 2799 | func=IpJpsi; |
2800 | break; | |
34f60c01 | 2801 | case kUpsilon: |
fe4da5cc | 2802 | func=IpUpsilon; |
2803 | break; | |
0ad09590 | 2804 | case kUpsilonFamily: |
2805 | func=IpUpsilonFamily; | |
2806 | break; | |
88e5db43 | 2807 | case kUpsilonP: |
2808 | func=IpUpsilonP; | |
2809 | break; | |
2810 | case kUpsilonPP: | |
2811 | func=IpUpsilonPP; | |
2812 | break; | |
34f60c01 | 2813 | case kCharm: |
fe4da5cc | 2814 | func=IpCharm; |
2815 | break; | |
34f60c01 | 2816 | case kBeauty: |
fe4da5cc | 2817 | func=IpBeauty; |
2818 | break; | |
34f60c01 | 2819 | case kPion: |
f9a1ce31 | 2820 | if (sname == "2010 Pos PP") { |
2821 | func=IpPionPos; | |
2822 | } else if (sname == "2010 Neg PP") { | |
2823 | func=IpPionNeg; | |
2824 | } else { | |
2825 | func=IpPion; | |
2826 | } | |
753690b0 | 2827 | break; |
34f60c01 | 2828 | case kKaon: |
f9a1ce31 | 2829 | if (sname == "2010 Pos PP") { |
2830 | func=IpKaonPos; | |
2831 | } else if (sname == "2010 Neg PP") { | |
2832 | func=IpKaonNeg; | |
2833 | } else { | |
2834 | func=IpKaon; | |
2835 | } | |
753690b0 | 2836 | break; |
6b450aa0 | 2837 | case kChic0: |
2838 | func=IpChic0; | |
00935af2 | 2839 | break; |
6b450aa0 | 2840 | case kChic1: |
2841 | func=IpChic1; | |
00935af2 | 2842 | break; |
6b450aa0 | 2843 | case kChic2: |
2844 | func=IpChic2; | |
00935af2 | 2845 | break; |
6b450aa0 | 2846 | case kChic: |
2847 | func=IpChic; | |
00935af2 | 2848 | break; |
119b35c7 | 2849 | default: |
2850 | func=0; | |
2851 | printf("<AliGenMUONlib::GetIp> unknown parametrisation\n"); | |
fe4da5cc | 2852 | } |
2853 | return func; | |
2854 | } | |
2855 | ||
2856 | ||
753690b0 | 2857 | |
05932df6 | 2858 | Float_t AliGenMUONlib::Interpolate(Float_t x, Float_t* y, Float_t x0, |
2859 | Float_t dx, | |
2860 | Int_t n, Int_t no) | |
2861 | { | |
2862 | // | |
2863 | // Neville's alorithm for interpolation | |
2864 | // | |
2865 | // x: x-value | |
2866 | // y: Input array | |
2867 | // x0: minimum x | |
2868 | // dx: step size | |
2869 | // n: number of data points | |
2870 | // no: order of polynom | |
2871 | // | |
2872 | Float_t* c = new Float_t[n]; | |
2873 | Float_t* d = new Float_t[n]; | |
2874 | Int_t m, i; | |
2875 | for (i = 0; i < n; i++) { | |
2876 | c[i] = y[i]; | |
2877 | d[i] = y[i]; | |
2878 | } | |
2879 | ||
2880 | Int_t ns = int((x - x0)/dx); | |
2881 | ||
2882 | Float_t y1 = y[ns]; | |
2883 | ns--; | |
2884 | for (m = 0; m < no; m++) { | |
2885 | for (i = 0; i < n-m; i++) { | |
2886 | Float_t ho = x0 + Float_t(i) * dx - x; | |
2887 | Float_t hp = x0 + Float_t(i+m+1) * dx - x; | |
2888 | Float_t w = c[i+1] - d[i]; | |
2889 | Float_t den = ho-hp; | |
2890 | den = w/den; | |
2891 | d[i] = hp * den; | |
2892 | c[i] = ho * den; | |
2893 | } | |
2894 | Float_t dy; | |
2895 | ||
2896 | if (2*ns < (n-m-1)) { | |
2897 | dy = c[ns+1]; | |
2898 | } else { | |
2899 | dy = d[ns--]; | |
2900 | } | |
2901 | y1 += dy;} | |
2902 | delete[] c; | |
2903 | delete[] d; | |
2904 | ||
2905 | return y1; | |
2906 | } | |
2907 | ||
f9a1ce31 | 2908 | //============================================================================= |
2909 | Double_t AliGenMUONlib::PtPionPos2010PP(const Double_t *px, const Double_t* /*dummy*/) | |
2910 | { | |
2911 | // Pos pion | |
2912 | const Double_t par[3] = {2.27501, 0.116141, 5.59591}; | |
2913 | Double_t pt = px[0]; | |
2914 | Double_t m0 = TDatabasePDG::Instance()->GetParticle(211)->Mass(); | |
2915 | Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); | |
2916 | Double_t nc = par[1]*par[2]; | |
2917 | Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); | |
2918 | Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); | |
2919 | Double_t fn = par[0] * pt * t1 * t2; | |
2920 | return fn; | |
2921 | } | |
2922 | ||
2923 | //============================================================================= | |
2924 | Double_t AliGenMUONlib::PtPionNeg2010PP(const Double_t *px, const Double_t* /*dummy*/) | |
2925 | { | |
2926 | // Neg pion | |
2927 | const Double_t par[3] = {2.25188, 0.12176, 5.91166}; | |
2928 | Double_t pt = px[0]; | |
2929 | Double_t m0 = TDatabasePDG::Instance()->GetParticle(211)->Mass(); | |
2930 | Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); | |
2931 | Double_t nc = par[1]*par[2]; | |
2932 | Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); | |
2933 | Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); | |
2934 | Double_t fn = par[0] * pt * t1 * t2; | |
2935 | return fn; | |
2936 | } | |
2937 | ||
2938 | //============================================================================= | |
2939 | Double_t AliGenMUONlib::PtKaonPos2010PP(const Double_t *px, const Double_t* /*dummy*/) | |
2940 | { | |
2941 | // Pos kaons | |
2942 | const Double_t par[3] = {0.279386, 0.195466, 6.59587}; | |
2943 | Double_t pt = px[0]; | |
2944 | Double_t m0 = TDatabasePDG::Instance()->GetParticle(321)->Mass(); | |
2945 | Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); | |
2946 | Double_t nc = par[1]*par[2]; | |
2947 | Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); | |
2948 | Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); | |
2949 | Double_t fn = par[0] * pt * t1 * t2; | |
2950 | return fn; | |
2951 | } | |
2952 | ||
2953 | //============================================================================= | |
2954 | Double_t AliGenMUONlib::PtKaonNeg2010PP(const Double_t *px, const Double_t* /*dummy*/) | |
2955 | { | |
2956 | // Neg kaons | |
2957 | const Double_t par[3] = {0.278927, 0.189049, 6.43006}; | |
2958 | Double_t pt = px[0]; | |
2959 | Double_t m0 = TDatabasePDG::Instance()->GetParticle(321)->Mass(); | |
2960 | Double_t mt = TMath::Sqrt(m0*m0 + pt*pt); | |
2961 | Double_t nc = par[1]*par[2]; | |
2962 | Double_t t1 = (par[2]-1.)/nc/(nc/(par[2]-2.)+m0); | |
2963 | Double_t t2 = TMath::Power(1.+(mt-m0)/nc, -1.*par[2]); | |
2964 | Double_t fn = par[0] * pt * t1 * t2; | |
2965 | return fn; | |
2966 | } | |
2967 | ||
2968 | //============================================================================= | |
2969 | Double_t AliGenMUONlib::YKaonPion2010PP(const Double_t *px, const Double_t* /*dummy*/) | |
2970 | { | |
2971 | // pions and kaons | |
2972 | Double_t y = px[0]; | |
2973 | Double_t sigma = 2.35; | |
2974 | Double_t kernal = y/2./sigma; | |
2975 | Double_t fxn = TMath::Exp(-1.*kernal*kernal); | |
2976 | return fxn; | |
2977 | } | |
753690b0 | 2978 | |
f9a1ce31 | 2979 | //============================================================================= |
2980 | Int_t AliGenMUONlib::IpPionPos(TRandom *) | |
2981 | { | |
2982 | // Pos pions | |
2983 | return 211; | |
2984 | } | |
2985 | ||
2986 | //============================================================================= | |
2987 | Int_t AliGenMUONlib::IpPionNeg(TRandom *) | |
2988 | { | |
2989 | // Neg pions | |
2990 | return -211; | |
2991 | } | |
2992 | ||
2993 | //============================================================================= | |
2994 | Int_t AliGenMUONlib::IpKaonPos(TRandom *) | |
2995 | { | |
2996 | // pos Kaons | |
2997 | return 321; | |
2998 | } | |
2999 | ||
3000 | //============================================================================= | |
3001 | Int_t AliGenMUONlib::IpKaonNeg(TRandom *) | |
3002 | { | |
3003 | // neg Kaons | |
3004 | return -321; | |
3005 | } |