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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" | |
29 | ||
fe4da5cc | 30 | #include "AliGenMUONlib.h" |
5c3fd7ea | 31 | |
fe4da5cc | 32 | ClassImp(AliGenMUONlib) |
33 | // | |
34 | // Pions | |
75e0cc59 | 35 | Double_t AliGenMUONlib::PtPion(const Double_t *px, const Double_t* /*dummy*/) |
fe4da5cc | 36 | { |
37 | // | |
38 | // PT-PARAMETERIZATION CDF, PRL 61(88) 1819 | |
39 | // POWER LAW FOR PT > 500 MEV | |
40 | // MT SCALING BELOW (T=160 MEV) | |
41 | // | |
d90f80fd | 42 | const Double_t kp0 = 1.3; |
43 | const Double_t kxn = 8.28; | |
44 | const Double_t kxlim=0.5; | |
45 | const Double_t kt=0.160; | |
46 | const Double_t kxmpi=0.139; | |
47 | const Double_t kb=1.; | |
fe4da5cc | 48 | Double_t y, y1, xmpi2, ynorm, a; |
49 | Double_t x=*px; | |
50 | // | |
d90f80fd | 51 | y1=TMath::Power(kp0/(kp0+kxlim),kxn); |
52 | xmpi2=kxmpi*kxmpi; | |
53 | ynorm=kb*(TMath::Exp(-sqrt(kxlim*kxlim+xmpi2)/kt)); | |
fe4da5cc | 54 | a=ynorm/y1; |
d90f80fd | 55 | if (x > kxlim) |
56 | y=a*TMath::Power(kp0/(kp0+x),kxn); | |
fe4da5cc | 57 | else |
d90f80fd | 58 | y=kb*TMath::Exp(-sqrt(x*x+xmpi2)/kt); |
fe4da5cc | 59 | return y*x; |
60 | } | |
753690b0 | 61 | // |
62 | // y-distribution | |
63 | // | |
75e0cc59 | 64 | Double_t AliGenMUONlib::YPion( const Double_t *py, const Double_t */*dummy*/) |
753690b0 | 65 | { |
d90f80fd | 66 | // Pion y |
2280e6af | 67 | Double_t y=TMath::Abs(*py); |
68 | /* | |
d90f80fd | 69 | const Double_t ka = 7000.; |
70 | const Double_t kdy = 4.; | |
d90f80fd | 71 | Double_t ex = y*y/(2*kdy*kdy); |
72 | return ka*TMath::Exp(-ex); | |
2280e6af | 73 | */ |
74 | return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; | |
75 | ||
753690b0 | 76 | } |
77 | // particle composition | |
78 | // | |
65fb704d | 79 | Int_t AliGenMUONlib::IpPion(TRandom *ran) |
753690b0 | 80 | { |
d90f80fd | 81 | // Pion composition |
65fb704d | 82 | if (ran->Rndm() < 0.5) { |
753690b0 | 83 | return 211; |
84 | } else { | |
85 | return -211; | |
86 | } | |
87 | } | |
fe4da5cc | 88 | |
89 | //____________________________________________________________ | |
90 | // | |
91 | // Mt-scaling | |
92 | ||
93 | Double_t AliGenMUONlib::PtScal(Double_t pt, Int_t np) | |
94 | { | |
95 | // SCALING EN MASSE PAR RAPPORT A PTPI | |
96 | // MASS PI,K,ETA,RHO,OMEGA,ETA',PHI | |
d90f80fd | 97 | const Double_t khm[10] = {.13957,.493,.5488,.769,.7826,.958,1.02,0,0,0}; |
fe4da5cc | 98 | // VALUE MESON/PI AT 5 GEV |
d90f80fd | 99 | const Double_t kfmax[10]={1.,0.3,0.55,1.0,1.0,1.0,1.0,0,0,0}; |
fe4da5cc | 100 | np--; |
d90f80fd | 101 | Double_t f5=TMath::Power(((sqrt(100.018215)+2.)/(sqrt(100.+khm[np]*khm[np])+2.0)),12.3); |
102 | Double_t fmax2=f5/kfmax[np]; | |
fe4da5cc | 103 | // PIONS |
104 | Double_t ptpion=100.*PtPion(&pt, (Double_t*) 0); | |
105 | Double_t fmtscal=TMath::Power(((sqrt(pt*pt+0.018215)+2.)/ | |
d90f80fd | 106 | (sqrt(pt*pt+khm[np]*khm[np])+2.0)),12.3)/ fmax2; |
fe4da5cc | 107 | return fmtscal*ptpion; |
108 | } | |
109 | // | |
753690b0 | 110 | // kaon |
111 | // | |
112 | // pt-distribution | |
113 | //____________________________________________________________ | |
75e0cc59 | 114 | Double_t AliGenMUONlib::PtKaon( const Double_t *px, const Double_t */*dummy*/) |
753690b0 | 115 | { |
d90f80fd | 116 | // Kaon pT |
753690b0 | 117 | return PtScal(*px,2); |
118 | } | |
119 | ||
120 | // y-distribution | |
fe4da5cc | 121 | //____________________________________________________________ |
75e0cc59 | 122 | Double_t AliGenMUONlib::YKaon( const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 123 | { |
d90f80fd | 124 | // Kaon y |
2280e6af | 125 | Double_t y=TMath::Abs(*py); |
126 | /* | |
d90f80fd | 127 | const Double_t ka = 1000.; |
128 | const Double_t kdy = 4.; | |
fe4da5cc | 129 | // |
d90f80fd | 130 | Double_t ex = y*y/(2*kdy*kdy); |
131 | return ka*TMath::Exp(-ex); | |
2280e6af | 132 | */ |
133 | ||
134 | return 1.16526e+04+y*-3.79886e+03+y*y*4.31130e+02; | |
753690b0 | 135 | } |
136 | ||
137 | // particle composition | |
138 | // | |
65fb704d | 139 | Int_t AliGenMUONlib::IpKaon(TRandom *ran) |
753690b0 | 140 | { |
d90f80fd | 141 | // Kaon composition |
65fb704d | 142 | if (ran->Rndm() < 0.5) { |
753690b0 | 143 | return 321; |
144 | } else { | |
145 | return -321; | |
146 | } | |
fe4da5cc | 147 | } |
753690b0 | 148 | |
fe4da5cc | 149 | // J/Psi |
150 | // | |
151 | // | |
152 | // pt-distribution | |
153 | //____________________________________________________________ | |
75e0cc59 | 154 | Double_t AliGenMUONlib::PtJpsi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 155 | { |
d90f80fd | 156 | // J/Psi pT |
157 | const Double_t kpt0 = 4.; | |
158 | const Double_t kxn = 3.6; | |
fe4da5cc | 159 | Double_t x=*px; |
160 | // | |
d90f80fd | 161 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
162 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 163 | } |
05932df6 | 164 | |
75e0cc59 | 165 | Double_t AliGenMUONlib::PtJpsiCDFscaled( const Double_t *px, const Double_t */*dummy*/) |
0e137c25 | 166 | { |
167 | // J/Psi pT | |
9e9ae065 | 168 | // |
169 | // PbPb 5.5 TeV | |
170 | // scaled from CDF data at 2 TeV | |
171 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
172 | ||
173 | const Double_t kpt0 = 5.100; | |
174 | const Double_t kxn = 4.102; | |
175 | Double_t x=*px; | |
176 | // | |
177 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
178 | return x/TMath::Power(pass1,kxn); | |
179 | } | |
180 | ||
75e0cc59 | 181 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP( const Double_t *px, const Double_t */*dummy*/) |
9ff13849 | 182 | { |
183 | // J/Psi pT | |
184 | // | |
185 | // pp 14 TeV | |
9ff13849 | 186 | // scaled from CDF data at 2 TeV |
187 | ||
9e9ae065 | 188 | const Double_t kpt0 = 5.630; |
189 | const Double_t kxn = 4.071; | |
190 | Double_t x=*px; | |
191 | // | |
192 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
193 | return x/TMath::Power(pass1,kxn); | |
194 | } | |
195 | ||
75e0cc59 | 196 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 197 | { |
198 | // J/Psi pT | |
199 | // | |
200 | // pp 10 TeV | |
201 | // scaled from CDF data at 2 TeV | |
202 | ||
203 | const Double_t kpt0 = 5.334; | |
204 | const Double_t kxn = 4.071; | |
205 | Double_t x=*px; | |
206 | // | |
207 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
208 | return x/TMath::Power(pass1,kxn); | |
209 | } | |
210 | ||
9fd56238 | 211 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
212 | { | |
213 | // J/Psi pT | |
214 | // | |
215 | // pp 8.8 TeV | |
216 | // scaled from CDF data at 2 TeV | |
217 | // | |
218 | const Double_t kpt0 = 5.245; | |
219 | const Double_t kxn = 4.071; | |
220 | Double_t x=*px; | |
221 | // | |
222 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
223 | return x/TMath::Power(pass1,kxn); | |
224 | } | |
225 | ||
226 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
227 | { | |
228 | // J/Psi pT | |
229 | // | |
230 | // pp 7 TeV | |
231 | // scaled from CDF data at 2 TeV | |
232 | ||
233 | const Double_t kpt0 = 5.072; | |
234 | const Double_t kxn = 4.071; | |
235 | Double_t x=*px; | |
236 | // | |
237 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
238 | return x/TMath::Power(pass1,kxn); | |
239 | } | |
240 | ||
241 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
242 | { | |
243 | // J/Psi pT | |
244 | // | |
245 | // pp 3.94 TeV | |
246 | // scaled from CDF data at 2 TeV | |
247 | // | |
248 | const Double_t kpt0 = 4.647; | |
249 | const Double_t kxn = 4.071; | |
250 | Double_t x=*px; | |
251 | // | |
252 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
253 | return x/TMath::Power(pass1,kxn); | |
254 | } | |
255 | ||
256 | Double_t AliGenMUONlib::PtJpsiCDFscaledPPb9( const Double_t *px, const Double_t *dummy) | |
257 | { | |
258 | // J/Psi pT | |
259 | // | |
260 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
261 | // | |
262 | Double_t c[5] = {6.42774e-01, 1.86168e-02, -6.77296e-04, 8.93512e-06, 1.31586e-07}; | |
263 | Double_t x=*px; | |
264 | Double_t y; | |
265 | Int_t j; | |
266 | y = c[j = 4]; | |
267 | while (j > 0) y = y * x + c[--j]; | |
268 | // | |
269 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
270 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); | |
271 | } | |
272 | ||
273 | Double_t AliGenMUONlib::PtJpsiCDFscaledPbP9( const Double_t *px, const Double_t *dummy) | |
274 | { | |
275 | // J/Psi pT | |
276 | // | |
277 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
278 | // | |
279 | Double_t c[5] = {8.58557e-01, 5.39791e-02, -4.75180e-03, 2.49463e-04, 5.52396e-05}; | |
280 | Double_t x=*px; | |
281 | Double_t y; | |
282 | Int_t j; | |
283 | y = c[j = 4]; | |
284 | while (j > 0) y = y * x + c[--j]; | |
285 | // | |
286 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
287 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP9(px,dummy); | |
288 | } | |
289 | ||
290 | Double_t AliGenMUONlib::PtJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
291 | { | |
292 | // J/Psi pT | |
293 | // | |
294 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
295 | // | |
296 | Double_t c[5] = {6.01022e-01, 4.70988e-02, -2.27917e-03, 3.09885e-05, 1.31955e-06}; | |
297 | Double_t x=*px; | |
298 | Double_t y; | |
299 | Int_t j; | |
300 | y = c[j = 4]; | |
301 | while (j > 0) y = y * x + c[--j]; | |
302 | // | |
303 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
304 | return y/d * AliGenMUONlib::PtJpsiCDFscaledPP4(px,dummy); | |
305 | } | |
306 | ||
75e0cc59 | 307 | Double_t AliGenMUONlib::PtJpsiFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 308 | { |
309 | return 1.; | |
310 | } | |
311 | ||
75e0cc59 | 312 | Double_t AliGenMUONlib::PtJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 313 | { |
1af7144e | 314 | // J/Psi pT spectrum |
05932df6 | 315 | // |
316 | // R. Vogt 2002 | |
317 | // PbPb 5.5 TeV | |
318 | // MRST HO | |
319 | // mc = 1.4 GeV, pt-kick 1 GeV | |
320 | // | |
1af7144e | 321 | Float_t x = px[0]; |
322 | Float_t c[8] = { | |
323 | -2.13098e+00, 9.46552e+00, -5.06799e+00, 1.27260e+00, | |
324 | -1.83806e-01, 1.55853e-02, -7.23241e-04, 1.42105e-05 | |
05932df6 | 325 | }; |
1af7144e | 326 | |
3d905dd7 | 327 | Double_t y; |
36349df1 | 328 | if (x < 10.) { |
3d905dd7 | 329 | Int_t j; |
330 | y = c[j = 7]; | |
331 | while (j > 0) y = y * x +c[--j]; | |
332 | y = x * TMath::Exp(y); | |
333 | } else { | |
334 | y = 0.; | |
335 | } | |
1af7144e | 336 | return y; |
05932df6 | 337 | } |
17d28ba5 | 338 | |
75e0cc59 | 339 | Double_t AliGenMUONlib::PtJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 340 | { |
341 | // J/Psi pT spectrum | |
342 | // B -> J/Psi X | |
343 | Double_t x0 = 4.0384; | |
344 | Double_t n = 3.0288; | |
345 | ||
346 | Double_t x = px[0]; | |
347 | Double_t y = x / TMath::Power((1. + (x/x0)*(x/x0)), n); | |
348 | ||
349 | return y; | |
350 | } | |
351 | ||
352 | ||
75e0cc59 | 353 | Double_t AliGenMUONlib::PtJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 354 | { |
355 | // J/Psi pT spectrum | |
356 | // | |
357 | // R. Vogt 2002 | |
358 | // pp 14 TeV | |
359 | // MRST HO | |
360 | // mc = 1.4 GeV, pt-kick 1 GeV | |
361 | // | |
362 | Float_t x = px[0]; | |
363 | Float_t c[4] = {8.47471e+00, -1.93567e+00, 1.50271e-01, -5.51212e-03}; | |
364 | ||
365 | Double_t y; | |
366 | if (x < 10.) { | |
367 | Int_t j; | |
368 | y = c[j = 3]; | |
369 | while (j > 0) y = y * x +c[--j]; | |
370 | y = x * TMath::Exp(y); | |
371 | } else { | |
372 | y = 0.; | |
373 | } | |
374 | return y; | |
375 | } | |
376 | ||
fe4da5cc | 377 | // |
378 | // y-distribution | |
379 | //____________________________________________________________ | |
75e0cc59 | 380 | Double_t AliGenMUONlib::YJpsi(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 381 | { |
d90f80fd | 382 | // J/psi y |
383 | const Double_t ky0 = 4.; | |
384 | const Double_t kb=1.; | |
fe4da5cc | 385 | Double_t yj; |
386 | Double_t y=TMath::Abs(*py); | |
387 | // | |
d90f80fd | 388 | if (y < ky0) |
389 | yj=kb; | |
fe4da5cc | 390 | else |
d90f80fd | 391 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 392 | return yj; |
393 | } | |
05932df6 | 394 | |
75e0cc59 | 395 | Double_t AliGenMUONlib::YJpsiFlat( const Double_t */*py*/, const Double_t */*dummy*/ ) |
4ca8d070 | 396 | { |
397 | return 1.; | |
398 | } | |
399 | ||
05932df6 | 400 | |
75e0cc59 | 401 | Double_t AliGenMUONlib::YJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 402 | { |
403 | ||
404 | // | |
405 | // J/Psi y | |
406 | // | |
407 | // | |
408 | // R. Vogt 2002 | |
409 | // PbPb 5.5 TeV | |
410 | // MRST HO | |
411 | // mc = 1.4 GeV, pt-kick 1 GeV | |
412 | // | |
1af7144e | 413 | Double_t c[5] = {-6.03425e+02, 4.98257e+02, -1.38794e+02, 1.62209e+01, -6.85955e-01}; |
414 | Double_t x = TMath::Abs(px[0]); | |
415 | Double_t y; | |
416 | ||
417 | if (x < 4.) { | |
418 | y = 31.754; | |
419 | } else if (x < 6) { | |
420 | Int_t j; | |
421 | y = c[j = 4]; | |
422 | while (j > 0) y = y * x + c[--j]; | |
423 | } else { | |
424 | y =0.; | |
425 | } | |
426 | ||
427 | return y; | |
05932df6 | 428 | } |
429 | ||
75e0cc59 | 430 | Double_t AliGenMUONlib::YJpsiCDFscaled( const Double_t *px, const Double_t* dummy) |
0e137c25 | 431 | { |
432 | // J/Psi y | |
433 | return AliGenMUONlib::YJpsiPbPb(px, dummy); | |
434 | } | |
435 | ||
75e0cc59 | 436 | Double_t AliGenMUONlib::YJpsiCDFscaledPP( const Double_t *px, const Double_t* dummy) |
9ff13849 | 437 | { |
438 | // J/Psi y | |
439 | return AliGenMUONlib::YJpsiPP(px, dummy); | |
440 | } | |
0e137c25 | 441 | |
75e0cc59 | 442 | Double_t AliGenMUONlib::YJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 443 | { |
9e9ae065 | 444 | // J/Psi y |
445 | // | |
446 | // pp 10 TeV | |
447 | // scaled from YJpsiPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
448 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
449 | // | |
450 | ||
451 | Double_t c[5] = {2.46681e+01, 8.91486e+01, -3.21227e+01, 3.63075e+00, -1.32047e-01}; | |
452 | ||
453 | Double_t x = TMath::Abs(px[0]); | |
454 | Double_t y; | |
455 | ||
456 | if (x < 3.2) { | |
457 | y = 98.523 - 1.3664 * x * x; | |
458 | } else if (x < 7.5) { | |
459 | Int_t j; | |
460 | y = c[j = 4]; | |
461 | while (j > 0) y = y * x + c[--j]; | |
462 | } else { | |
463 | y =0.; | |
464 | } | |
465 | ||
466 | if(y<0) y=0; | |
467 | ||
468 | return y; | |
469 | } | |
470 | ||
9fd56238 | 471 | Double_t AliGenMUONlib::YJpsiCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
472 | { | |
473 | // J/Psi y | |
474 | // | |
475 | // pp 8.8 TeV | |
476 | // rescaling of YJpsiPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD | |
477 | // | |
478 | Double_t c[5] = {3.33882e+02, -1.30980e+02, 2.59082e+01, -3.08935e+00, 1.56375e-01}; | |
479 | Double_t x = TMath::Abs(px[0]); | |
480 | Double_t y; | |
481 | ||
482 | if (x < 3.7) { | |
483 | y = 99.236 - 1.5498 * x * x; | |
484 | } else if (x < 7.4) { | |
485 | Int_t j; | |
486 | y = c[j = 4]; | |
487 | while (j > 0) y = y * x + c[--j]; | |
488 | } else { | |
489 | y =0.; | |
490 | } | |
491 | ||
492 | if(y<0) y=0; | |
493 | ||
494 | return y; | |
495 | } | |
496 | ||
497 | Double_t AliGenMUONlib::YJpsiCDFscaledPP9dummy(Double_t px) | |
498 | { | |
499 | return AliGenMUONlib::YJpsiCDFscaledPP9(&px, (Double_t*) 0); | |
500 | } | |
501 | ||
502 | Double_t AliGenMUONlib::YJpsiCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
503 | { | |
504 | // J/Psi y | |
505 | // | |
506 | // pp 7 TeV | |
507 | // scaled from YJpsiPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
508 | // | |
509 | ||
510 | Double_t c[5] = {6.71181e+02, -3.69240e+02, 8.89644e+01, -1.04937e+01, 4.80959e-01}; | |
511 | ||
512 | Double_t x = TMath::Abs(px[0]); | |
513 | Double_t y; | |
514 | ||
515 | if (x < 4.0) { | |
516 | y = 100.78 - 1.8353 * x * x; | |
517 | } else if (x < 7.3) { | |
518 | Int_t j; | |
519 | y = c[j = 4]; | |
520 | while (j > 0) y = y * x + c[--j]; | |
521 | } else { | |
522 | y =0.; | |
523 | } | |
524 | ||
525 | if(y<0) y=0; | |
526 | ||
527 | return y; | |
528 | } | |
529 | ||
530 | Double_t AliGenMUONlib::YJpsiCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
531 | { | |
532 | // J/Psi y | |
533 | // | |
534 | // pp 3.94 TeV | |
535 | // rescaling of YJpsiPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD | |
536 | // | |
537 | Double_t c[5] = {4.00785e+02, -1.41159e+01, -3.28599e+01, 5.53048e+00, -2.45151e-01}; | |
538 | Double_t x = TMath::Abs(px[0]); | |
539 | Double_t y; | |
540 | ||
541 | if (x < 5.5) { | |
542 | y = 107.389 - 2.7454 * x * x; | |
543 | } else if (x < 7.0) { | |
544 | Int_t j; | |
545 | y = c[j = 4]; | |
546 | while (j > 0) y = y * x + c[--j]; | |
547 | } else { | |
548 | y =0.; | |
549 | } | |
550 | ||
551 | if(y<0) y=0; | |
552 | ||
553 | return y; | |
554 | } | |
555 | ||
75e0cc59 | 556 | Double_t AliGenMUONlib::YJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 557 | { |
558 | ||
559 | // | |
560 | // J/Psi y | |
561 | // | |
562 | // | |
563 | // R. Vogt 2002 | |
564 | // pp 14 TeV | |
565 | // MRST HO | |
566 | // mc = 1.4 GeV, pt-kick 1 GeV | |
567 | // | |
568 | ||
569 | Double_t c[5] = {1.38532e+00, 1.00596e+02, -3.46378e+01, 3.94172e+00, -1.48319e-01}; | |
570 | Double_t x = TMath::Abs(px[0]); | |
571 | Double_t y; | |
572 | ||
573 | if (x < 2.5) { | |
574 | y = 96.455 - 0.8483 * x * x; | |
575 | } else if (x < 7.9) { | |
576 | Int_t j; | |
577 | y = c[j = 4]; | |
578 | while (j > 0) y = y * x + c[--j]; | |
579 | } else { | |
580 | y =0.; | |
581 | } | |
582 | ||
583 | return y; | |
584 | } | |
585 | ||
9fd56238 | 586 | Double_t AliGenMUONlib::YJpsiCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) |
587 | { | |
588 | // J/Psi y | |
589 | // | |
590 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
591 | // | |
592 | Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, | |
593 | -4.16509e-05,-7.62709e-06}; | |
594 | Double_t y; | |
595 | Double_t x = px[0] + 0.47; // rapidity shift | |
596 | Int_t j; | |
597 | y = c[j = 6]; | |
598 | while (j > 0) y = y * x + c[--j]; | |
599 | if(y<0) y=0; | |
600 | ||
601 | return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); | |
602 | } | |
603 | ||
604 | Double_t AliGenMUONlib::YJpsiCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) | |
605 | { | |
606 | // J/Psi y | |
607 | // | |
608 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.80 | |
609 | // | |
610 | Double_t c[7] = {7.52296e-01, 2.49917e-02, 3.36500e-03, 1.91187e-03, 2.92154e-04, | |
611 | -4.16509e-05,-7.62709e-06}; | |
612 | Double_t y; | |
613 | Double_t x = -px[0] + 0.47; // rapidity shift | |
614 | Int_t j; | |
615 | y = c[j = 6]; | |
616 | while (j > 0) y = y * x + c[--j]; | |
617 | if(y<0) y=0; | |
618 | ||
619 | return y * AliGenMUONlib::YJpsiCDFscaledPP9dummy(x); | |
620 | } | |
621 | ||
622 | Double_t AliGenMUONlib::YJpsiCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
623 | { | |
624 | // J/Psi y | |
625 | // | |
626 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.66 | |
627 | // | |
628 | Double_t c[4] = {5.95228e-01, 9.45069e-03, 2.44710e-04, -1.32894e-05}; | |
629 | Double_t x = px[0]*px[0]; | |
630 | Double_t y; | |
631 | Int_t j; | |
632 | y = c[j = 3]; | |
633 | while (j > 0) y = y * x + c[--j]; | |
634 | if(y<0) y=0; | |
635 | ||
636 | return y * AliGenMUONlib::YJpsiCDFscaledPP4(px,dummy); | |
637 | } | |
638 | ||
75e0cc59 | 639 | Double_t AliGenMUONlib::YJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 640 | { |
641 | ||
642 | // | |
643 | // J/Psi from B->J/Psi X | |
644 | // | |
645 | // | |
646 | ||
647 | ||
648 | Double_t c[7] = {7.37025e-02, 0., -2.94487e-03, 0., 6.07953e-06, 0., 5.39219e-07}; | |
649 | ||
650 | Double_t x = TMath::Abs(px[0]); | |
651 | Double_t y; | |
652 | ||
653 | if (x > 6.) { | |
654 | y = 0.; | |
655 | } else { | |
656 | Int_t j; | |
657 | y = c[j = 6]; | |
658 | while (j > 0) y = y * x + c[--j]; | |
659 | } | |
660 | ||
661 | return y; | |
662 | } | |
663 | ||
664 | ||
665 | ||
fe4da5cc | 666 | // particle composition |
667 | // | |
65fb704d | 668 | Int_t AliGenMUONlib::IpJpsi(TRandom *) |
fe4da5cc | 669 | { |
d90f80fd | 670 | // J/Psi composition |
88cb7938 | 671 | return 443; |
fe4da5cc | 672 | } |
88e5db43 | 673 | Int_t AliGenMUONlib::IpPsiP(TRandom *) |
674 | { | |
675 | // Psi prime composition | |
676 | return 100443; | |
677 | } | |
0ad09590 | 678 | Int_t AliGenMUONlib::IpJpsiFamily(TRandom *) |
679 | { | |
680 | // J/Psi composition | |
681 | Int_t ip; | |
682 | Float_t r = gRandom->Rndm(); | |
683 | if (r < 0.98) { | |
684 | ip = 443; | |
685 | } else { | |
686 | ip = 100443; | |
687 | } | |
688 | return ip; | |
689 | } | |
690 | ||
fe4da5cc | 691 | |
88e5db43 | 692 | |
fe4da5cc | 693 | // Upsilon |
694 | // | |
695 | // | |
696 | // pt-distribution | |
697 | //____________________________________________________________ | |
75e0cc59 | 698 | Double_t AliGenMUONlib::PtUpsilon( const Double_t *px, const Double_t */*dummy*/ ) |
fe4da5cc | 699 | { |
d90f80fd | 700 | // Upsilon pT |
701 | const Double_t kpt0 = 5.3; | |
702 | const Double_t kxn = 2.5; | |
fe4da5cc | 703 | Double_t x=*px; |
704 | // | |
d90f80fd | 705 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
706 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 707 | } |
05932df6 | 708 | |
75e0cc59 | 709 | Double_t AliGenMUONlib::PtUpsilonCDFscaled( const Double_t *px, const Double_t */*dummy*/ ) |
0e137c25 | 710 | { |
711 | // Upsilon pT | |
48416d65 | 712 | const Double_t kpt0 = 7.753; |
713 | const Double_t kxn = 3.042; | |
0e137c25 | 714 | Double_t x=*px; |
715 | // | |
716 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
717 | return x/TMath::Power(pass1,kxn); | |
718 | } | |
719 | ||
75e0cc59 | 720 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP( const Double_t *px, const Double_t */*dummy*/ ) |
9ff13849 | 721 | { |
722 | // Upsilon pT | |
723 | // | |
724 | // pp 14 TeV | |
725 | // | |
726 | // scaled from CDF data at 2 TeV | |
727 | ||
728 | const Double_t kpt0 = 8.610; | |
729 | const Double_t kxn = 3.051; | |
730 | Double_t x=*px; | |
731 | // | |
732 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
733 | return x/TMath::Power(pass1,kxn); | |
734 | } | |
735 | ||
b33adf51 | 736 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
737 | { | |
738 | // Upsilon pT | |
739 | // | |
740 | // pp 10 TeV | |
741 | // | |
742 | // scaled from CDF data at 2 TeV | |
743 | ||
744 | const Double_t kpt0 = 8.235; | |
745 | const Double_t kxn = 3.051; | |
746 | Double_t x=*px; | |
747 | // | |
748 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
749 | return x/TMath::Power(pass1,kxn); | |
750 | } | |
751 | ||
9fd56238 | 752 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) |
753 | { | |
754 | // Upsilon pT | |
755 | // | |
756 | // pp 8.8 TeV | |
757 | // scaled from CDF data at 2 TeV | |
758 | // | |
759 | const Double_t kpt0 = 8.048; | |
760 | const Double_t kxn = 3.051; | |
761 | Double_t x=*px; | |
762 | // | |
763 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
764 | return x/TMath::Power(pass1,kxn); | |
765 | } | |
766 | ||
767 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
768 | { | |
769 | // Upsilon pT | |
770 | // | |
771 | // pp 7 TeV | |
772 | // | |
773 | // scaled from CDF data at 2 TeV | |
774 | ||
775 | const Double_t kpt0 = 7.817; | |
776 | const Double_t kxn = 3.051; | |
777 | Double_t x=*px; | |
778 | // | |
779 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
780 | return x/TMath::Power(pass1,kxn); | |
781 | } | |
782 | ||
783 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
784 | { | |
785 | // Upsilon pT | |
786 | // | |
787 | // pp 3.94 TeV | |
788 | // scaled from CDF data at 2 TeV | |
789 | // | |
790 | const Double_t kpt0 = 7.189; | |
791 | const Double_t kxn = 3.051; | |
792 | Double_t x=*px; | |
793 | // | |
794 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
795 | return x/TMath::Power(pass1,kxn); | |
796 | } | |
797 | ||
798 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPPb9( const Double_t *px, const Double_t *dummy) | |
799 | { | |
800 | // Upsilon pT | |
801 | // | |
802 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
803 | // | |
804 | Double_t c[5] = {7.64952e-01, 1.12501e-04, 4.96038e-04, -3.03198e-05, 3.74035e-06}; | |
805 | Double_t x=*px; | |
806 | Double_t y; | |
807 | Int_t j; | |
808 | y = c[j = 4]; | |
809 | while (j > 0) y = y * x + c[--j]; | |
810 | // | |
811 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
812 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); | |
813 | } | |
814 | ||
815 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPbP9( const Double_t *px, const Double_t *dummy) | |
816 | { | |
817 | // Upsilon pT | |
818 | // | |
819 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
820 | // | |
821 | Double_t c[5] = {1.09881e+00, 3.08329e-03, -2.00356e-04, 8.28991e-06, 2.52576e-06}; | |
822 | Double_t x=*px; | |
823 | Double_t y; | |
824 | Int_t j; | |
825 | y = c[j = 4]; | |
826 | while (j > 0) y = y * x + c[--j]; | |
827 | // | |
828 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
829 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP9(px,dummy); | |
830 | } | |
831 | ||
832 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
833 | { | |
834 | // Upsilon pT | |
835 | // | |
836 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 | |
837 | // | |
838 | Double_t c[5] = {8.65872e-01, 2.05465e-03, 2.56063e-04, -1.65598e-05, 2.29209e-06}; | |
839 | Double_t x=*px; | |
840 | Double_t y; | |
841 | Int_t j; | |
842 | y = c[j = 4]; | |
843 | while (j > 0) y = y * x + c[--j]; | |
844 | // | |
845 | Double_t d = 1.+c[4]*TMath::Power(x,4); | |
846 | return y/d * AliGenMUONlib::PtUpsilonCDFscaledPP4(px,dummy); | |
847 | } | |
848 | ||
75e0cc59 | 849 | Double_t AliGenMUONlib::PtUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 850 | { |
851 | return 1.; | |
852 | } | |
853 | ||
75e0cc59 | 854 | Double_t AliGenMUONlib::PtUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 855 | { |
05932df6 | 856 | // |
857 | // Upsilon pT | |
858 | // | |
859 | // | |
860 | // R. Vogt 2002 | |
861 | // PbPb 5.5 TeV | |
862 | // MRST HO | |
863 | // mc = 1.4 GeV, pt-kick 1 GeV | |
864 | // | |
1af7144e | 865 | Float_t x = px[0]; |
866 | Double_t c[8] = { | |
867 | -1.03488e+01, 1.28065e+01, -6.60500e+00, 1.66140e+00, | |
868 | -2.34293e-01, 1.86925e-02, -7.80708e-04, 1.30610e-05 | |
869 | }; | |
3d905dd7 | 870 | Double_t y; |
871 | if (x < 10.) { | |
872 | Int_t j; | |
873 | y = c[j = 7]; | |
874 | while (j > 0) y = y * x +c[--j]; | |
875 | y = x * TMath::Exp(y); | |
876 | } else { | |
877 | y = 0.; | |
878 | } | |
1af7144e | 879 | return y; |
05932df6 | 880 | } |
881 | ||
75e0cc59 | 882 | Double_t AliGenMUONlib::PtUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 883 | { |
bb6e81ac | 884 | // |
885 | // Upsilon pT | |
886 | // | |
887 | // | |
888 | // R. Vogt 2002 | |
889 | // pp 14 TeV | |
890 | // MRST HO | |
891 | // mc = 1.4 GeV, pt-kick 1 GeV | |
892 | // | |
893 | Float_t x = px[0]; | |
894 | Double_t c[8] = {-7.93955e+00, 1.06306e+01, -5.21392e+00, 1.19703e+00, | |
895 | -1.45718e-01, 8.95151e-03, -2.04806e-04, -1.13053e-06}; | |
896 | ||
897 | Double_t y; | |
898 | if (x < 10.) { | |
899 | Int_t j; | |
900 | y = c[j = 7]; | |
901 | while (j > 0) y = y * x +c[--j]; | |
902 | y = x * TMath::Exp(y); | |
903 | } else { | |
904 | y = 0.; | |
905 | } | |
906 | return y; | |
907 | } | |
908 | ||
fe4da5cc | 909 | // |
910 | // y-distribution | |
911 | // | |
912 | //____________________________________________________________ | |
75e0cc59 | 913 | Double_t AliGenMUONlib::YUpsilon(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 914 | { |
d90f80fd | 915 | // Upsilon y |
916 | const Double_t ky0 = 3.; | |
917 | const Double_t kb=1.; | |
fe4da5cc | 918 | Double_t yu; |
919 | Double_t y=TMath::Abs(*py); | |
920 | // | |
d90f80fd | 921 | if (y < ky0) |
922 | yu=kb; | |
fe4da5cc | 923 | else |
d90f80fd | 924 | yu=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 925 | return yu; |
926 | } | |
05932df6 | 927 | |
928 | ||
75e0cc59 | 929 | Double_t AliGenMUONlib::YUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 930 | { |
931 | ||
932 | // | |
933 | // Upsilon y | |
934 | // | |
935 | // | |
936 | // R. Vogt 2002 | |
937 | // PbPb 5.5 TeV | |
938 | // MRST HO | |
939 | // mc = 1.4 GeV, pt-kick 1 GeV | |
940 | // | |
941 | ||
1af7144e | 942 | Double_t c[7] = {3.40036e-01, -3.98882e-07, -4.48398e-03, 8.46411e-08, -6.10854e-04, |
943 | -2.99753e-09, 1.28895e-05}; | |
b33adf51 | 944 | Double_t x = TMath::Abs(px[0]); |
945 | if (x > 5.55) return 0.; | |
1af7144e | 946 | Int_t j; |
947 | Double_t y = c[j = 6]; | |
948 | while (j > 0) y = y * x +c[--j]; | |
949 | return y; | |
05932df6 | 950 | } |
951 | ||
75e0cc59 | 952 | Double_t AliGenMUONlib::YUpsilonCDFscaled( const Double_t *px, const Double_t *dummy) |
0e137c25 | 953 | { |
954 | // Upsilon y | |
955 | return AliGenMUONlib::YUpsilonPbPb(px, dummy); | |
956 | ||
4ca8d070 | 957 | } |
9ff13849 | 958 | |
75e0cc59 | 959 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP( const Double_t *px, const Double_t *dummy) |
9ff13849 | 960 | { |
961 | // Upsilon y | |
962 | return AliGenMUONlib::YUpsilonPP(px, dummy); | |
963 | ||
964 | } | |
965 | ||
75e0cc59 | 966 | Double_t AliGenMUONlib::YUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/) |
4ca8d070 | 967 | { |
968 | // Upsilon y | |
969 | return 1.; | |
970 | ||
0e137c25 | 971 | } |
972 | ||
b33adf51 | 973 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
974 | { | |
b33adf51 | 975 | // Upsilon y |
976 | // | |
977 | // pp 10 TeV | |
978 | // scaled from YUpsilonPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
979 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
980 | // | |
9fd56238 | 981 | Double_t c[4] = {1., -2.17877e-02, -6.52830e-04, 1.40578e-05}; |
982 | Double_t x = TMath::Abs(px[0]); | |
983 | if (x > 6.1) return 0.; | |
984 | Int_t j; | |
985 | Double_t y = c[j = 3]; | |
986 | while (j > 0) y = y * x*x +c[--j]; | |
987 | return y; | |
988 | } | |
989 | ||
990 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP9( const Double_t *px, const Double_t */*dummy*/) | |
991 | { | |
992 | // Upsilon y | |
993 | // | |
994 | // pp 8.8 TeV | |
995 | // rescaling of YUpsilonPP(14 TeV) using 8.8 TeV / 14 TeV ratio of y-spectra in LO QCD | |
996 | // | |
997 | Double_t c[4] = {1., -2.37621e-02, -6.29610e-04, 1.47976e-05}; | |
b33adf51 | 998 | Double_t x = TMath::Abs(px[0]); |
999 | if (x > 6.1) return 0.; | |
1000 | Int_t j; | |
1001 | Double_t y = c[j = 3]; | |
1002 | while (j > 0) y = y * x*x +c[--j]; | |
1003 | return y; | |
1004 | } | |
1005 | ||
9fd56238 | 1006 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP9dummy(Double_t px) |
1007 | { | |
1008 | return AliGenMUONlib::YUpsilonCDFscaledPP9(&px, (Double_t*) 0); | |
1009 | } | |
1010 | ||
1011 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP7( const Double_t *px, const Double_t */*dummy*/) | |
1012 | { | |
1013 | // Upsilon y | |
1014 | // | |
1015 | // pp 7 TeV | |
1016 | // scaled from YUpsilonPP(14 TeV) using 7 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
1017 | // | |
1018 | Double_t c[4] = {1., -2.61009e-02, -6.83937e-04, 1.78451e-05}; | |
1019 | Double_t x = TMath::Abs(px[0]); | |
1020 | if (x > 6.0) return 0.; | |
1021 | Int_t j; | |
1022 | Double_t y = c[j = 3]; | |
1023 | while (j > 0) y = y * x*x +c[--j]; | |
1024 | return y; | |
1025 | } | |
1026 | ||
1027 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP4( const Double_t *px, const Double_t */*dummy*/) | |
1028 | { | |
1029 | // Upsilon y | |
1030 | // | |
1031 | // pp 3.94 TeV | |
1032 | // rescaling of YUpsilonPP(14 TeV) using 3.94 TeV / 14 TeV ratio of y-spectra in LO QCD | |
1033 | // | |
1034 | Double_t c[4] = {1., -3.91924e-02, -4.26184e-04, 2.10914e-05}; | |
1035 | Double_t x = TMath::Abs(px[0]); | |
1036 | if (x > 5.7) return 0.; | |
1037 | Int_t j; | |
1038 | Double_t y = c[j = 3]; | |
1039 | while (j > 0) y = y * x*x +c[--j]; | |
1040 | ||
1041 | return y; | |
1042 | } | |
1043 | ||
75e0cc59 | 1044 | Double_t AliGenMUONlib::YUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 1045 | { |
1046 | ||
1047 | // | |
1048 | // Upsilon y | |
1049 | // | |
1050 | // | |
1051 | // R. Vogt 2002 | |
1052 | // p p 14. TeV | |
1053 | // MRST HO | |
1054 | // mc = 1.4 GeV, pt-kick 1 GeV | |
1055 | // | |
1056 | Double_t c[7] = {8.91936e-01, -6.46645e-07, -1.52774e-02, 4.28677e-08, -7.01517e-04, | |
1057 | -6.20539e-10, 1.29943e-05}; | |
b33adf51 | 1058 | Double_t x = TMath::Abs(px[0]); |
1059 | if (x > 6.2) return 0.; | |
bb6e81ac | 1060 | Int_t j; |
1061 | Double_t y = c[j = 6]; | |
1062 | while (j > 0) y = y * x +c[--j]; | |
1063 | return y; | |
1064 | } | |
1065 | ||
9fd56238 | 1066 | Double_t AliGenMUONlib::YUpsilonCDFscaledPPb9( const Double_t *px, const Double_t */*dummy*/) |
1067 | { | |
1068 | // Upsilon y | |
1069 | // | |
1070 | // pPb 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
1071 | // | |
1072 | Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, | |
1073 | -4.67538e-05,-2.11683e-06}; | |
1074 | Double_t y; | |
1075 | Double_t x = px[0] + 0.47; // rapidity shift | |
1076 | Int_t j; | |
1077 | y = c[j = 6]; | |
1078 | while (j > 0) y = y * x + c[--j]; | |
1079 | if(y<0) y=0; | |
1080 | ||
1081 | return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); | |
1082 | } | |
1083 | ||
1084 | Double_t AliGenMUONlib::YUpsilonCDFscaledPbP9( const Double_t *px, const Double_t */*dummy*/) | |
1085 | { | |
1086 | // Upsilon y | |
1087 | // | |
1088 | // Pbp 8.8 TeV, for EKS98 with minimum bias shadowing factor 0.90 | |
1089 | // | |
1090 | Double_t c[7] = {8.71829e-01, 4.77467e-02, 8.09671e-03, 6.45294e-04, -2.15730e-04, | |
1091 | -4.67538e-05,-2.11683e-06}; | |
1092 | Double_t y; | |
1093 | Double_t x = -px[0] + 0.47; // rapidity shift | |
1094 | Int_t j; | |
1095 | y = c[j = 6]; | |
1096 | while (j > 0) y = y * x + c[--j]; | |
1097 | if(y<0) y=0; | |
1098 | ||
1099 | return y * AliGenMUONlib::YUpsilonCDFscaledPP9dummy(x); | |
1100 | } | |
1101 | ||
1102 | Double_t AliGenMUONlib::YUpsilonCDFscaledPbPb4( const Double_t *px, const Double_t *dummy) | |
1103 | { | |
1104 | // Upsilon y | |
1105 | // | |
1106 | // PbPb 3.94 TeV, for EKS98 with minimum bias shadowing factor 0.85 | |
1107 | // | |
1108 | Double_t c[4] = {8.27837e-01, 1.70115e-02, -1.26046e-03, 1.52091e-05}; | |
1109 | Double_t x = px[0]*px[0]; | |
1110 | Double_t y; | |
1111 | Int_t j; | |
1112 | y = c[j = 3]; | |
1113 | while (j > 0) y = y * x + c[--j]; | |
1114 | if(y<0) y=0; | |
1115 | ||
1116 | return y * AliGenMUONlib::YUpsilonCDFscaledPP4(px,dummy); | |
1117 | } | |
1118 | ||
1119 | ||
fe4da5cc | 1120 | // particle composition |
1121 | // | |
65fb704d | 1122 | Int_t AliGenMUONlib::IpUpsilon(TRandom *) |
fe4da5cc | 1123 | { |
d90f80fd | 1124 | // y composition |
88cb7938 | 1125 | return 553; |
fe4da5cc | 1126 | } |
88e5db43 | 1127 | Int_t AliGenMUONlib::IpUpsilonP(TRandom *) |
1128 | { | |
1129 | // y composition | |
1130 | return 100553; | |
1131 | } | |
1132 | Int_t AliGenMUONlib::IpUpsilonPP(TRandom *) | |
1133 | { | |
1134 | // y composition | |
1135 | return 200553; | |
1136 | } | |
0ad09590 | 1137 | Int_t AliGenMUONlib::IpUpsilonFamily(TRandom *) |
1138 | { | |
1139 | // y composition | |
1140 | Int_t ip; | |
1141 | Float_t r = gRandom->Rndm(); | |
1142 | ||
1143 | if (r < 0.712) { | |
1144 | ip = 553; | |
1145 | } else if (r < 0.896) { | |
1146 | ip = 100553; | |
1147 | } else { | |
1148 | ip = 200553; | |
1149 | } | |
1150 | return ip; | |
1151 | } | |
fe4da5cc | 1152 | |
88e5db43 | 1153 | |
fe4da5cc | 1154 | // |
1155 | // Phi | |
1156 | // | |
1157 | // | |
1158 | // pt-distribution (by scaling of pion distribution) | |
1159 | //____________________________________________________________ | |
75e0cc59 | 1160 | Double_t AliGenMUONlib::PtPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1161 | { |
d90f80fd | 1162 | // Phi pT |
fe4da5cc | 1163 | return PtScal(*px,7); |
1164 | } | |
1165 | // y-distribution | |
75e0cc59 | 1166 | Double_t AliGenMUONlib::YPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1167 | { |
d90f80fd | 1168 | // Phi y |
1169 | Double_t *dum=0; | |
1170 | return YJpsi(px,dum); | |
fe4da5cc | 1171 | } |
1172 | // particle composition | |
1173 | // | |
65fb704d | 1174 | Int_t AliGenMUONlib::IpPhi(TRandom *) |
fe4da5cc | 1175 | { |
d90f80fd | 1176 | // Phi composition |
89512a3b | 1177 | return 333; |
1178 | } | |
1179 | ||
1180 | // | |
1181 | // omega | |
1182 | // | |
1183 | // | |
1184 | // pt-distribution (by scaling of pion distribution) | |
1185 | //____________________________________________________________ | |
75e0cc59 | 1186 | Double_t AliGenMUONlib::PtOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1187 | { |
1188 | // Omega pT | |
1189 | return PtScal(*px,5); | |
1190 | } | |
1191 | // y-distribution | |
75e0cc59 | 1192 | Double_t AliGenMUONlib::YOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1193 | { |
1194 | // Omega y | |
1195 | Double_t *dum=0; | |
1196 | return YJpsi(px,dum); | |
1197 | } | |
1198 | // particle composition | |
1199 | // | |
1200 | Int_t AliGenMUONlib::IpOmega(TRandom *) | |
1201 | { | |
1202 | // Omega composition | |
1203 | return 223; | |
1204 | } | |
1205 | ||
1206 | ||
1207 | // | |
1208 | // Eta | |
1209 | // | |
1210 | // | |
1211 | // pt-distribution (by scaling of pion distribution) | |
1212 | //____________________________________________________________ | |
75e0cc59 | 1213 | Double_t AliGenMUONlib::PtEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1214 | { |
1215 | // Eta pT | |
1216 | return PtScal(*px,3); | |
1217 | } | |
1218 | // y-distribution | |
75e0cc59 | 1219 | Double_t AliGenMUONlib::YEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 1220 | { |
1221 | // Eta y | |
1222 | Double_t *dum=0; | |
1223 | return YJpsi(px,dum); | |
1224 | } | |
1225 | // particle composition | |
1226 | // | |
1227 | Int_t AliGenMUONlib::IpEta(TRandom *) | |
1228 | { | |
1229 | // Eta composition | |
1230 | return 221; | |
fe4da5cc | 1231 | } |
1232 | ||
1233 | // | |
1234 | // Charm | |
1235 | // | |
1236 | // | |
1237 | // pt-distribution | |
1238 | //____________________________________________________________ | |
75e0cc59 | 1239 | Double_t AliGenMUONlib::PtCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1240 | { |
d90f80fd | 1241 | // Charm pT |
bd0276a8 | 1242 | const Double_t kpt0 = 2.25; |
1243 | const Double_t kxn = 3.17; | |
fe4da5cc | 1244 | Double_t x=*px; |
1245 | // | |
bd0276a8 | 1246 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
1247 | return x/TMath::Power(pass1,kxn); | |
1248 | } | |
1249 | ||
75e0cc59 | 1250 | Double_t AliGenMUONlib::PtCharmCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 1251 | { |
1252 | // Charm pT | |
1253 | const Double_t kpt0 = 2.12; | |
1254 | const Double_t kxn = 2.78; | |
bd0276a8 | 1255 | Double_t x=*px; |
1256 | // | |
1257 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
d90f80fd | 1258 | return x/TMath::Power(pass1,kxn); |
fe4da5cc | 1259 | } |
75e0cc59 | 1260 | Double_t AliGenMUONlib::PtCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1261 | { |
1262 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1263 | // PtCharmFiMjSkPP = PtCharmF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
1264 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1265 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1266 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1267 | // calculations for the following inputs: | |
1268 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
1269 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
1270 | // for j=0,1 & 2 respectively; | |
1271 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1272 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
1273 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1274 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1275 | // June 2008, Smbat.Grigoryan@cern.ch | |
1276 | ||
1277 | // Charm pT | |
1278 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
1279 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
1280 | // Corresponding NLO total cross section is 5.68 mb | |
1281 | ||
1282 | ||
1283 | const Double_t kpt0 = 2.2930; | |
1284 | const Double_t kxn = 3.1196; | |
1285 | Double_t c[3]={-5.2180e-01,1.8753e-01,2.8669e-02}; | |
1286 | Double_t x=*px; | |
1287 | // | |
1288 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1289 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1290 | } | |
75e0cc59 | 1291 | Double_t AliGenMUONlib::PtCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1292 | { |
1293 | // Charm pT | |
1294 | // Corresponding NLO total cross section is 6.06 mb | |
1295 | const Double_t kpt0 = 2.8669; | |
1296 | const Double_t kxn = 3.1044; | |
1297 | Double_t c[3]={-4.6714e-01,1.5005e-01,4.5003e-02}; | |
1298 | Double_t x=*px; | |
1299 | // | |
1300 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1301 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1302 | } | |
75e0cc59 | 1303 | Double_t AliGenMUONlib::PtCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1304 | { |
1305 | // Charm pT | |
1306 | // Corresponding NLO total cross section is 6.06 mb | |
1307 | const Double_t kpt0 = 1.8361; | |
1308 | const Double_t kxn = 3.2966; | |
1309 | Double_t c[3]={-6.1550e-01,2.6498e-01,1.0728e-02}; | |
1310 | Double_t x=*px; | |
1311 | // | |
1312 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1313 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1314 | } | |
75e0cc59 | 1315 | Double_t AliGenMUONlib::PtCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1316 | { |
1317 | // Charm pT | |
1318 | // Corresponding NLO total cross section is 7.69 mb | |
1319 | const Double_t kpt0 = 2.1280; | |
1320 | const Double_t kxn = 3.1397; | |
1321 | Double_t c[3]={-5.4021e-01,2.0944e-01,2.5211e-02}; | |
1322 | Double_t x=*px; | |
1323 | // | |
1324 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1325 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1326 | } | |
75e0cc59 | 1327 | Double_t AliGenMUONlib::PtCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1328 | { |
1329 | // Charm pT | |
1330 | // Corresponding NLO total cross section is 4.81 mb | |
1331 | const Double_t kpt0 = 2.4579; | |
1332 | const Double_t kxn = 3.1095; | |
1333 | Double_t c[3]={-5.1497e-01,1.7532e-01,3.2429e-02}; | |
1334 | Double_t x=*px; | |
1335 | // | |
1336 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1337 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1338 | } | |
75e0cc59 | 1339 | Double_t AliGenMUONlib::PtCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1340 | { |
1341 | // Charm pT | |
1342 | // Corresponding NLO total cross section is 14.09 mb | |
1343 | const Double_t kpt0 = 2.1272; | |
1344 | const Double_t kxn = 3.1904; | |
1345 | Double_t c[3]={-4.6088e-01,2.1918e-01,2.3055e-02}; | |
1346 | Double_t x=*px; | |
1347 | // | |
1348 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1349 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1350 | } | |
75e0cc59 | 1351 | Double_t AliGenMUONlib::PtCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1352 | { |
1353 | // Charm pT | |
1354 | // Corresponding NLO total cross section is 1.52 mb | |
1355 | const Double_t kpt0 = 2.8159; | |
1356 | const Double_t kxn = 3.0857; | |
1357 | Double_t c[3]={-6.4691e-01,2.0289e-01,2.4922e-02}; | |
1358 | Double_t x=*px; | |
1359 | // | |
1360 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1361 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1362 | } | |
75e0cc59 | 1363 | Double_t AliGenMUONlib::PtCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1364 | { |
1365 | // Charm pT | |
1366 | // Corresponding NLO total cross section is 3.67 mb | |
1367 | const Double_t kpt0 = 2.7297; | |
1368 | const Double_t kxn = 3.3019; | |
1369 | Double_t c[3]={-6.2216e-01,1.9031e-01,1.5341e-02}; | |
1370 | Double_t x=*px; | |
1371 | // | |
1372 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1373 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1374 | } | |
75e0cc59 | 1375 | Double_t AliGenMUONlib::PtCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1376 | { |
1377 | // Charm pT | |
1378 | // Corresponding NLO total cross section is 3.38 mb | |
1379 | const Double_t kpt0 = 2.3894; | |
1380 | const Double_t kxn = 3.1075; | |
1381 | Double_t c[3]={-4.9742e-01,1.7032e-01,2.5994e-02}; | |
1382 | Double_t x=*px; | |
1383 | // | |
1384 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1385 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1386 | } | |
75e0cc59 | 1387 | Double_t AliGenMUONlib::PtCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1388 | { |
1389 | // Charm pT | |
1390 | // Corresponding NLO total cross section is 10.37 mb | |
1391 | const Double_t kpt0 = 2.0187; | |
1392 | const Double_t kxn = 3.3011; | |
1393 | Double_t c[3]={-3.9869e-01,2.9248e-01,1.1763e-02}; | |
1394 | Double_t x=*px; | |
1395 | // | |
1396 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1397 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1398 | } | |
75e0cc59 | 1399 | Double_t AliGenMUONlib::PtCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1400 | { |
1401 | // Charm pT | |
1402 | // Corresponding NLO total cross section is 7.22 mb | |
1403 | const Double_t kpt0 = 2.1089; | |
1404 | const Double_t kxn = 3.1848; | |
1405 | Double_t c[3]={-4.6275e-01,1.8114e-01,2.1363e-02}; | |
1406 | Double_t x=*px; | |
1407 | // | |
1408 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1409 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
1410 | } | |
1411 | ||
fe4da5cc | 1412 | // y-distribution |
75e0cc59 | 1413 | Double_t AliGenMUONlib::YCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1414 | { |
ec772ba2 | 1415 | // Charm y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
1416 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
1417 | // shadowing + kt broadening | |
1418 | ||
1419 | Double_t x=px[0]; | |
1420 | Double_t c[2]={-2.42985e-03,-2.31001e-04}; | |
1421 | Double_t y=1+(c[0]*TMath::Power(x,2))+(c[1]*TMath::Power(x,4)); | |
1422 | Double_t ycharm; | |
1423 | ||
1424 | if (TMath::Abs(x)>8) { | |
1425 | ycharm=0.; | |
1426 | } | |
1427 | else { | |
1428 | ycharm=TMath::Power(y,3); | |
1429 | } | |
1430 | ||
1431 | return ycharm; | |
fe4da5cc | 1432 | } |
75e0cc59 | 1433 | Double_t AliGenMUONlib::YCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1434 | { |
1435 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1436 | // YCharmFiMjSkPP = YCharmF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
1437 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1438 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1439 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1440 | // calculations for the following inputs: | |
1441 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
1442 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
1443 | // for j=0,1 & 2 respectively; | |
1444 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1445 | // with a/b = 1/1,1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1446 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1447 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1448 | // June 2008, Smbat.Grigoryan@cern.ch | |
1449 | ||
1450 | // Charm y | |
1451 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
1452 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
1453 | // Corresponding NLO total cross section is 5.68 mb | |
1454 | ||
1455 | Double_t x=px[0]; | |
1456 | Double_t c[2]={7.0909e-03,6.1967e-05}; | |
1457 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1458 | Double_t ycharm; | |
1459 | ||
1460 | if (TMath::Abs(x)>9) { | |
1461 | ycharm=0.; | |
1462 | } | |
1463 | else { | |
1464 | ycharm=TMath::Power(y,3); | |
1465 | } | |
1466 | ||
1467 | return ycharm; | |
1468 | } | |
75e0cc59 | 1469 | Double_t AliGenMUONlib::YCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1470 | { |
1471 | // Charm y | |
1472 | // Corresponding NLO total cross section is 6.06 mb | |
1473 | Double_t x=px[0]; | |
1474 | Double_t c[2]={6.9707e-03,6.0971e-05}; | |
1475 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1476 | Double_t ycharm; | |
1477 | ||
1478 | if (TMath::Abs(x)>9) { | |
1479 | ycharm=0.; | |
1480 | } | |
1481 | else { | |
1482 | ycharm=TMath::Power(y,3); | |
1483 | } | |
1484 | ||
1485 | return ycharm; | |
1486 | } | |
75e0cc59 | 1487 | Double_t AliGenMUONlib::YCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1488 | { |
1489 | // Charm y | |
1490 | // Corresponding NLO total cross section is 6.06 mb | |
1491 | Double_t x=px[0]; | |
1492 | Double_t c[2]={7.1687e-03,6.5303e-05}; | |
1493 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1494 | Double_t ycharm; | |
1495 | ||
1496 | if (TMath::Abs(x)>9) { | |
1497 | ycharm=0.; | |
1498 | } | |
1499 | else { | |
1500 | ycharm=TMath::Power(y,3); | |
1501 | } | |
1502 | ||
1503 | return ycharm; | |
1504 | } | |
75e0cc59 | 1505 | Double_t AliGenMUONlib::YCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1506 | { |
1507 | // Charm y | |
1508 | // Corresponding NLO total cross section is 7.69 mb | |
1509 | Double_t x=px[0]; | |
1510 | Double_t c[2]={5.9090e-03,7.1854e-05}; | |
1511 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1512 | Double_t ycharm; | |
1513 | ||
1514 | if (TMath::Abs(x)>9) { | |
1515 | ycharm=0.; | |
1516 | } | |
1517 | else { | |
1518 | ycharm=TMath::Power(y,3); | |
1519 | } | |
1520 | ||
1521 | return ycharm; | |
1522 | } | |
75e0cc59 | 1523 | Double_t AliGenMUONlib::YCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1524 | { |
1525 | // Charm y | |
1526 | // Corresponding NLO total cross section is 4.81 mb | |
1527 | Double_t x=px[0]; | |
1528 | Double_t c[2]={8.0882e-03,5.5872e-05}; | |
1529 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1530 | Double_t ycharm; | |
1531 | ||
1532 | if (TMath::Abs(x)>9) { | |
1533 | ycharm=0.; | |
1534 | } | |
1535 | else { | |
1536 | ycharm=TMath::Power(y,3); | |
1537 | } | |
1538 | ||
1539 | return ycharm; | |
1540 | } | |
75e0cc59 | 1541 | Double_t AliGenMUONlib::YCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1542 | { |
1543 | // Charm y | |
1544 | // Corresponding NLO total cross section is 14.09 mb | |
1545 | Double_t x=px[0]; | |
1546 | Double_t c[2]={7.2520e-03,6.2691e-05}; | |
1547 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1548 | Double_t ycharm; | |
1549 | ||
1550 | if (TMath::Abs(x)>9) { | |
1551 | ycharm=0.; | |
1552 | } | |
1553 | else { | |
1554 | ycharm=TMath::Power(y,3); | |
1555 | } | |
1556 | ||
1557 | return ycharm; | |
1558 | } | |
75e0cc59 | 1559 | Double_t AliGenMUONlib::YCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1560 | { |
1561 | // Charm y | |
1562 | // Corresponding NLO total cross section is 1.52 mb | |
1563 | Double_t x=px[0]; | |
1564 | Double_t c[2]={1.1040e-04,1.4498e-04}; | |
1565 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1566 | Double_t ycharm; | |
1567 | ||
1568 | if (TMath::Abs(x)>9) { | |
1569 | ycharm=0.; | |
1570 | } | |
1571 | else { | |
1572 | ycharm=TMath::Power(y,3); | |
1573 | } | |
1574 | ||
1575 | return ycharm; | |
1576 | } | |
75e0cc59 | 1577 | Double_t AliGenMUONlib::YCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1578 | { |
1579 | // Charm y | |
1580 | // Corresponding NLO total cross section is 3.67 mb | |
1581 | Double_t x=px[0]; | |
1582 | Double_t c[2]={-3.1328e-03,1.8270e-04}; | |
1583 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1584 | Double_t ycharm; | |
1585 | ||
1586 | if (TMath::Abs(x)>9) { | |
1587 | ycharm=0.; | |
1588 | } | |
1589 | else { | |
1590 | ycharm=TMath::Power(y,3); | |
1591 | } | |
1592 | ||
1593 | return ycharm; | |
1594 | } | |
75e0cc59 | 1595 | Double_t AliGenMUONlib::YCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1596 | { |
1597 | // Charm y | |
1598 | // Corresponding NLO total cross section is 3.38 mb | |
1599 | Double_t x=px[0]; | |
1600 | Double_t c[2]={7.0865e-03,6.2532e-05}; | |
1601 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1602 | Double_t ycharm; | |
1603 | ||
1604 | if (TMath::Abs(x)>9) { | |
1605 | ycharm=0.; | |
1606 | } | |
1607 | else { | |
1608 | ycharm=TMath::Power(y,3); | |
1609 | } | |
1610 | ||
1611 | return ycharm; | |
1612 | } | |
75e0cc59 | 1613 | Double_t AliGenMUONlib::YCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1614 | { |
1615 | // Charm y | |
1616 | // Corresponding NLO total cross section is 10.37 mb | |
1617 | Double_t x=px[0]; | |
1618 | Double_t c[2]={7.7070e-03,5.3533e-05}; | |
1619 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1620 | Double_t ycharm; | |
1621 | ||
1622 | if (TMath::Abs(x)>9) { | |
1623 | ycharm=0.; | |
1624 | } | |
1625 | else { | |
1626 | ycharm=TMath::Power(y,3); | |
1627 | } | |
1628 | ||
1629 | return ycharm; | |
1630 | } | |
75e0cc59 | 1631 | Double_t AliGenMUONlib::YCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1632 | { |
1633 | // Charm y | |
1634 | // Corresponding NLO total cross section is 7.22 mb | |
1635 | Double_t x=px[0]; | |
1636 | Double_t c[2]={7.9195e-03,5.3823e-05}; | |
1637 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1638 | Double_t ycharm; | |
1639 | ||
1640 | if (TMath::Abs(x)>9) { | |
1641 | ycharm=0.; | |
1642 | } | |
1643 | else { | |
1644 | ycharm=TMath::Power(y,3); | |
1645 | } | |
1646 | ||
1647 | return ycharm; | |
1648 | } | |
fe4da5cc | 1649 | |
ec772ba2 | 1650 | |
65fb704d | 1651 | Int_t AliGenMUONlib::IpCharm(TRandom *ran) |
fe4da5cc | 1652 | { |
d90f80fd | 1653 | // Charm composition |
65fb704d | 1654 | Float_t random; |
fe4da5cc | 1655 | Int_t ip; |
1656 | // 411,421,431,4122 | |
65fb704d | 1657 | random = ran->Rndm(); |
ec772ba2 | 1658 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 |
1659 | // >>>>> cf. tab 4 p 11 | |
1660 | ||
1661 | if (random < 0.30) { | |
1662 | ip=421; | |
1663 | } else if (random < 0.60) { | |
1664 | ip=-421; | |
1665 | } else if (random < 0.70) { | |
1666 | ip=411; | |
1667 | } else if (random < 0.80) { | |
1668 | ip=-411; | |
1669 | } else if (random < 0.86) { | |
1670 | ip=431; | |
1671 | } else if (random < 0.92) { | |
1672 | ip=-431; | |
1673 | } else if (random < 0.96) { | |
1674 | ip=4122; | |
fe4da5cc | 1675 | } else { |
ec772ba2 | 1676 | ip=-4122; |
fe4da5cc | 1677 | } |
fe4da5cc | 1678 | |
1679 | return ip; | |
1680 | } | |
1681 | ||
fe4da5cc | 1682 | // |
1683 | // Beauty | |
1684 | // | |
1685 | // | |
1686 | // pt-distribution | |
1687 | //____________________________________________________________ | |
75e0cc59 | 1688 | Double_t AliGenMUONlib::PtBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1689 | { |
d90f80fd | 1690 | // Beauty pT |
bd0276a8 | 1691 | const Double_t kpt0 = 6.53; |
1692 | const Double_t kxn = 3.59; | |
1693 | Double_t x=*px; | |
1694 | // | |
1695 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1696 | return x/TMath::Power(pass1,kxn); | |
1697 | } | |
1698 | ||
75e0cc59 | 1699 | Double_t AliGenMUONlib::PtBeautyCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 1700 | { |
1701 | // Beauty pT | |
1702 | const Double_t kpt0 = 6.14; | |
1703 | const Double_t kxn = 2.93; | |
fe4da5cc | 1704 | Double_t x=*px; |
1705 | // | |
d90f80fd | 1706 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
1707 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 1708 | } |
75e0cc59 | 1709 | Double_t AliGenMUONlib::PtBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1710 | { |
1711 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1712 | // PtBeautyFiMjSkPP = PtBeautyF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
1713 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1714 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1715 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1716 | // calculations for the following inputs: | |
1717 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
1718 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
1719 | // for j=0,1 & 2 respectively; | |
1720 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1721 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1722 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1723 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1724 | // June 2008, Smbat.Grigoryan@cern.ch | |
1725 | ||
1726 | // Beauty pT | |
1727 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
1728 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
1729 | // Corresponding NLO total cross section is 0.494 mb | |
1730 | ||
1731 | const Double_t kpt0 = 8.0575; | |
1732 | const Double_t kxn = 3.1921; | |
1733 | Double_t x=*px; | |
1734 | // | |
1735 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1736 | return x/TMath::Power(pass1,kxn); | |
1737 | } | |
75e0cc59 | 1738 | Double_t AliGenMUONlib::PtBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1739 | { |
1740 | // Beauty pT | |
1741 | // Corresponding NLO total cross section is 0.445 mb | |
1742 | const Double_t kpt0 = 8.6239; | |
1743 | const Double_t kxn = 3.2911; | |
1744 | Double_t x=*px; | |
1745 | // | |
1746 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1747 | return x/TMath::Power(pass1,kxn); | |
1748 | } | |
75e0cc59 | 1749 | Double_t AliGenMUONlib::PtBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1750 | { |
1751 | // Beauty pT | |
1752 | // Corresponding NLO total cross section is 0.445 mb | |
1753 | const Double_t kpt0 = 7.3367; | |
1754 | const Double_t kxn = 3.0692; | |
1755 | Double_t x=*px; | |
1756 | // | |
1757 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1758 | return x/TMath::Power(pass1,kxn); | |
1759 | } | |
75e0cc59 | 1760 | Double_t AliGenMUONlib::PtBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1761 | { |
1762 | // Beauty pT | |
1763 | // Corresponding NLO total cross section is 0.518 mb | |
1764 | const Double_t kpt0 = 7.6409; | |
1765 | const Double_t kxn = 3.1364; | |
1766 | Double_t x=*px; | |
1767 | // | |
1768 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1769 | return x/TMath::Power(pass1,kxn); | |
1770 | } | |
75e0cc59 | 1771 | Double_t AliGenMUONlib::PtBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1772 | { |
1773 | // Beauty pT | |
1774 | // Corresponding NLO total cross section is 0.384 mb | |
1775 | const Double_t kpt0 = 8.4948; | |
1776 | const Double_t kxn = 3.2546; | |
1777 | Double_t x=*px; | |
1778 | // | |
1779 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1780 | return x/TMath::Power(pass1,kxn); | |
1781 | } | |
75e0cc59 | 1782 | Double_t AliGenMUONlib::PtBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1783 | { |
1784 | // Beauty pT | |
1785 | // Corresponding NLO total cross section is 0.648 mb | |
1786 | const Double_t kpt0 = 7.6631; | |
1787 | const Double_t kxn = 3.1621; | |
1788 | Double_t x=*px; | |
1789 | // | |
1790 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1791 | return x/TMath::Power(pass1,kxn); | |
1792 | } | |
75e0cc59 | 1793 | Double_t AliGenMUONlib::PtBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1794 | { |
1795 | // Beauty pT | |
1796 | // Corresponding NLO total cross section is 0.294 mb | |
1797 | const Double_t kpt0 = 8.7245; | |
1798 | const Double_t kxn = 3.2213; | |
1799 | Double_t x=*px; | |
1800 | // | |
1801 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1802 | return x/TMath::Power(pass1,kxn); | |
1803 | } | |
75e0cc59 | 1804 | Double_t AliGenMUONlib::PtBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1805 | { |
1806 | // Beauty pT | |
1807 | // Corresponding NLO total cross section is 0.475 mb | |
1808 | const Double_t kpt0 = 8.5296; | |
1809 | const Double_t kxn = 3.2187; | |
1810 | Double_t x=*px; | |
1811 | // | |
1812 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1813 | return x/TMath::Power(pass1,kxn); | |
1814 | } | |
75e0cc59 | 1815 | Double_t AliGenMUONlib::PtBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1816 | { |
1817 | // Beauty pT | |
1818 | // Corresponding NLO total cross section is 0.324 mb | |
1819 | const Double_t kpt0 = 7.9440; | |
1820 | const Double_t kxn = 3.1614; | |
1821 | Double_t x=*px; | |
1822 | // | |
1823 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1824 | return x/TMath::Power(pass1,kxn); | |
1825 | } | |
75e0cc59 | 1826 | Double_t AliGenMUONlib::PtBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1827 | { |
1828 | // Beauty pT | |
1829 | // Corresponding NLO total cross section is 0.536 mb | |
1830 | const Double_t kpt0 = 8.2408; | |
1831 | const Double_t kxn = 3.3029; | |
1832 | Double_t x=*px; | |
1833 | // | |
1834 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1835 | return x/TMath::Power(pass1,kxn); | |
1836 | } | |
75e0cc59 | 1837 | Double_t AliGenMUONlib::PtBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1838 | { |
1839 | // Beauty pT | |
1840 | // Corresponding NLO total cross section is 0.420 mb | |
1841 | const Double_t kpt0 = 7.8041; | |
1842 | const Double_t kxn = 3.2094; | |
1843 | Double_t x=*px; | |
1844 | // | |
1845 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1846 | return x/TMath::Power(pass1,kxn); | |
1847 | } | |
1848 | ||
fe4da5cc | 1849 | // y-distribution |
75e0cc59 | 1850 | Double_t AliGenMUONlib::YBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1851 | { |
ec772ba2 | 1852 | // Beauty y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
1853 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
1854 | // shadowing + kt broadening | |
1855 | ||
1856 | Double_t x=px[0]; | |
1857 | Double_t c[2]={-1.27590e-02,-2.42731e-04}; | |
1858 | Double_t y=1+c[0]*TMath::Power(x,2)+c[1]*TMath::Power(x,4); | |
1859 | Double_t ybeauty; | |
1860 | ||
1861 | if (TMath::Abs(x)>6) { | |
1862 | ybeauty=0.; | |
1863 | } | |
1864 | else { | |
1865 | ybeauty=TMath::Power(y,3); | |
1866 | } | |
1867 | ||
1868 | return ybeauty; | |
fe4da5cc | 1869 | } |
75e0cc59 | 1870 | Double_t AliGenMUONlib::YBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1871 | { |
1872 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1873 | // YBeautyFiMjSkPP = YBeautyF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
1874 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1875 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1876 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1877 | // calculations for the following inputs: | |
1878 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
1879 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
1880 | // for j=0,1 & 2 respectively; | |
1881 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1882 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
1883 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1884 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1885 | // June 2008, Smbat.Grigoryan@cern.ch | |
1886 | ||
1887 | // Beauty y | |
1888 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
1889 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
1890 | // Corresponding NLO total cross section is 0.494 mb | |
1891 | ||
fe4da5cc | 1892 | |
9e9ae065 | 1893 | Double_t x=px[0]; |
1894 | Double_t c[2]={1.2350e-02,9.2667e-05}; | |
1895 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1896 | Double_t ybeauty; | |
1897 | ||
1898 | if (TMath::Abs(x)>7.6) { | |
1899 | ybeauty=0.; | |
1900 | } | |
1901 | else { | |
1902 | ybeauty=TMath::Power(y,3); | |
1903 | } | |
1904 | ||
1905 | return ybeauty; | |
1906 | } | |
75e0cc59 | 1907 | Double_t AliGenMUONlib::YBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1908 | { |
1909 | // Beauty y | |
1910 | // Corresponding NLO total cross section is 0.445 mb | |
1911 | Double_t x=px[0]; | |
1912 | Double_t c[2]={1.2292e-02,9.1847e-05}; | |
1913 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1914 | Double_t ybeauty; | |
1915 | ||
1916 | if (TMath::Abs(x)>7.6) { | |
1917 | ybeauty=0.; | |
1918 | } | |
1919 | else { | |
1920 | ybeauty=TMath::Power(y,3); | |
1921 | } | |
1922 | ||
1923 | return ybeauty; | |
1924 | } | |
75e0cc59 | 1925 | Double_t AliGenMUONlib::YBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1926 | { |
1927 | // Beauty y | |
1928 | // Corresponding NLO total cross section is 0.445 mb | |
1929 | Double_t x=px[0]; | |
1930 | Double_t c[2]={1.2436e-02,9.3709e-05}; | |
1931 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1932 | Double_t ybeauty; | |
1933 | ||
1934 | if (TMath::Abs(x)>7.6) { | |
1935 | ybeauty=0.; | |
1936 | } | |
1937 | else { | |
1938 | ybeauty=TMath::Power(y,3); | |
1939 | } | |
1940 | ||
1941 | return ybeauty; | |
1942 | } | |
75e0cc59 | 1943 | Double_t AliGenMUONlib::YBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1944 | { |
1945 | // Beauty y | |
1946 | // Corresponding NLO total cross section is 0.518 mb | |
1947 | Double_t x=px[0]; | |
1948 | Double_t c[2]={1.1714e-02,1.0068e-04}; | |
1949 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1950 | Double_t ybeauty; | |
1951 | ||
1952 | if (TMath::Abs(x)>7.6) { | |
1953 | ybeauty=0.; | |
1954 | } | |
1955 | else { | |
1956 | ybeauty=TMath::Power(y,3); | |
1957 | } | |
1958 | ||
1959 | return ybeauty; | |
1960 | } | |
75e0cc59 | 1961 | Double_t AliGenMUONlib::YBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1962 | { |
1963 | // Beauty y | |
1964 | // Corresponding NLO total cross section is 0.384 mb | |
1965 | Double_t x=px[0]; | |
1966 | Double_t c[2]={1.2944e-02,8.5500e-05}; | |
1967 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1968 | Double_t ybeauty; | |
1969 | ||
1970 | if (TMath::Abs(x)>7.6) { | |
1971 | ybeauty=0.; | |
1972 | } | |
1973 | else { | |
1974 | ybeauty=TMath::Power(y,3); | |
1975 | } | |
1976 | ||
1977 | return ybeauty; | |
1978 | } | |
75e0cc59 | 1979 | Double_t AliGenMUONlib::YBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1980 | { |
1981 | // Beauty y | |
1982 | // Corresponding NLO total cross section is 0.648 mb | |
1983 | Double_t x=px[0]; | |
1984 | Double_t c[2]={1.2455e-02,9.2713e-05}; | |
1985 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1986 | Double_t ybeauty; | |
1987 | ||
1988 | if (TMath::Abs(x)>7.6) { | |
1989 | ybeauty=0.; | |
1990 | } | |
1991 | else { | |
1992 | ybeauty=TMath::Power(y,3); | |
1993 | } | |
1994 | ||
1995 | return ybeauty; | |
1996 | } | |
75e0cc59 | 1997 | Double_t AliGenMUONlib::YBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1998 | { |
1999 | // Beauty y | |
2000 | // Corresponding NLO total cross section is 0.294 mb | |
2001 | Double_t x=px[0]; | |
2002 | Double_t c[2]={1.0897e-02,1.1878e-04}; | |
2003 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2004 | Double_t ybeauty; | |
2005 | ||
2006 | if (TMath::Abs(x)>7.6) { | |
2007 | ybeauty=0.; | |
2008 | } | |
2009 | else { | |
2010 | ybeauty=TMath::Power(y,3); | |
2011 | } | |
2012 | ||
2013 | return ybeauty; | |
2014 | } | |
75e0cc59 | 2015 | Double_t AliGenMUONlib::YBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2016 | { |
2017 | // Beauty y | |
2018 | // Corresponding NLO total cross section is 0.475 mb | |
2019 | Double_t x=px[0]; | |
2020 | Double_t c[2]={1.0912e-02,1.1858e-04}; | |
2021 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2022 | Double_t ybeauty; | |
2023 | ||
2024 | if (TMath::Abs(x)>7.6) { | |
2025 | ybeauty=0.; | |
2026 | } | |
2027 | else { | |
2028 | ybeauty=TMath::Power(y,3); | |
2029 | } | |
2030 | ||
2031 | return ybeauty; | |
2032 | } | |
75e0cc59 | 2033 | Double_t AliGenMUONlib::YBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2034 | { |
2035 | // Beauty y | |
2036 | // Corresponding NLO total cross section is 0.324 mb | |
2037 | Double_t x=px[0]; | |
2038 | Double_t c[2]={1.2378e-02,9.2490e-05}; | |
2039 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2040 | Double_t ybeauty; | |
2041 | ||
2042 | if (TMath::Abs(x)>7.6) { | |
2043 | ybeauty=0.; | |
2044 | } | |
2045 | else { | |
2046 | ybeauty=TMath::Power(y,3); | |
2047 | } | |
2048 | ||
2049 | return ybeauty; | |
2050 | } | |
75e0cc59 | 2051 | Double_t AliGenMUONlib::YBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2052 | { |
2053 | // Beauty y | |
2054 | // Corresponding NLO total cross section is 0.536 mb | |
2055 | Double_t x=px[0]; | |
2056 | Double_t c[2]={1.2886e-02,8.2912e-05}; | |
2057 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2058 | Double_t ybeauty; | |
2059 | ||
2060 | if (TMath::Abs(x)>7.6) { | |
2061 | ybeauty=0.; | |
2062 | } | |
2063 | else { | |
2064 | ybeauty=TMath::Power(y,3); | |
2065 | } | |
2066 | ||
2067 | return ybeauty; | |
2068 | } | |
75e0cc59 | 2069 | Double_t AliGenMUONlib::YBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 2070 | { |
2071 | // Beauty y | |
2072 | // Corresponding NLO total cross section is 0.420 mb | |
2073 | Double_t x=px[0]; | |
2074 | Double_t c[2]={1.3106e-02,8.0115e-05}; | |
2075 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
2076 | Double_t ybeauty; | |
2077 | ||
2078 | if (TMath::Abs(x)>7.6) { | |
2079 | ybeauty=0.; | |
2080 | } | |
2081 | else { | |
2082 | ybeauty=TMath::Power(y,3); | |
2083 | } | |
2084 | ||
2085 | return ybeauty; | |
2086 | } | |
ec772ba2 | 2087 | |
65fb704d | 2088 | Int_t AliGenMUONlib::IpBeauty(TRandom *ran) |
fe4da5cc | 2089 | { |
d90f80fd | 2090 | // Beauty Composition |
65fb704d | 2091 | Float_t random; |
fe4da5cc | 2092 | Int_t ip; |
ec772ba2 | 2093 | random = ran->Rndm(); |
2094 | ||
2095 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 | |
2096 | // >>>>> cf. tab 4 p 11 | |
2097 | ||
2098 | if (random < 0.20) { | |
2099 | ip=511; | |
2100 | } else if (random < 0.40) { | |
2101 | ip=-511; | |
2102 | } else if (random < 0.605) { | |
2103 | ip=521; | |
2104 | } else if (random < 0.81) { | |
2105 | ip=-521; | |
2106 | } else if (random < 0.87) { | |
2107 | ip=531; | |
2108 | } else if (random < 0.93) { | |
2109 | ip=-531; | |
2110 | } else if (random < 0.965) { | |
2111 | ip=5122; | |
fe4da5cc | 2112 | } else { |
ec772ba2 | 2113 | ip=-5122; |
fe4da5cc | 2114 | } |
fe4da5cc | 2115 | |
ec772ba2 | 2116 | return ip; |
fe4da5cc | 2117 | } |
2118 | ||
ec772ba2 | 2119 | |
75e0cc59 | 2120 | typedef Double_t (*GenFunc) (const Double_t*, const Double_t*); |
53904666 | 2121 | GenFunc AliGenMUONlib::GetPt(Int_t param, const char* tname) const |
fe4da5cc | 2122 | { |
d90f80fd | 2123 | // Return pointer to pT parameterisation |
05932df6 | 2124 | TString sname = TString(tname); |
fe4da5cc | 2125 | GenFunc func; |
753690b0 | 2126 | switch (param) |
fe4da5cc | 2127 | { |
34f60c01 | 2128 | case kPhi: |
fe4da5cc | 2129 | func=PtPhi; |
2130 | break; | |
89512a3b | 2131 | case kOmega: |
2132 | func=PtOmega; | |
2133 | break; | |
2134 | case kEta: | |
2135 | func=PtEta; | |
2136 | break; | |
0ad09590 | 2137 | case kJpsiFamily: |
88e5db43 | 2138 | case kPsiP: |
ba8bf3f5 | 2139 | case kChic1: |
2140 | case kChic2: | |
34f60c01 | 2141 | case kJpsi: |
bb6e81ac | 2142 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2143 | func=PtJpsiPbPb; |
bb6e81ac | 2144 | } else if (sname == "Vogt pp") { |
2145 | func=PtJpsiPP; | |
0e137c25 | 2146 | } else if (sname == "CDF scaled") { |
2147 | func=PtJpsiCDFscaled; | |
9ff13849 | 2148 | } else if (sname == "CDF pp") { |
2149 | func=PtJpsiCDFscaledPP; | |
9e9ae065 | 2150 | } else if (sname == "CDF pp 10") { |
2151 | func=PtJpsiCDFscaledPP10; | |
9fd56238 | 2152 | } else if (sname == "CDF pp 8.8") { |
2153 | func=PtJpsiCDFscaledPP9; | |
94a2994d | 2154 | } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat y") { |
9fd56238 | 2155 | func=PtJpsiCDFscaledPP7; |
2156 | } else if (sname == "CDF pp 3.94") { | |
2157 | func=PtJpsiCDFscaledPP4; | |
2158 | } else if (sname == "CDF pPb 8.8") { | |
2159 | func=PtJpsiCDFscaledPPb9; | |
2160 | } else if (sname == "CDF Pbp 8.8") { | |
2161 | func=PtJpsiCDFscaledPbP9; | |
2162 | } else if (sname == "CDF PbPb 3.94") { | |
2163 | func=PtJpsiCDFscaledPbPb4; | |
94a2994d | 2164 | } else if (sname == "Flat" || sname == "CDF pp 7 flat pt") { |
4ca8d070 | 2165 | func=PtJpsiFlat; |
05932df6 | 2166 | } else { |
2167 | func=PtJpsi; | |
2168 | } | |
fe4da5cc | 2169 | break; |
17d28ba5 | 2170 | case kJpsiFromB: |
2171 | func = PtJpsiBPbPb; | |
2172 | break; | |
0ad09590 | 2173 | case kUpsilonFamily: |
88e5db43 | 2174 | case kUpsilonP: |
2175 | case kUpsilonPP: | |
34f60c01 | 2176 | case kUpsilon: |
bb6e81ac | 2177 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2178 | func=PtUpsilonPbPb; |
bb6e81ac | 2179 | } else if (sname == "Vogt pp") { |
2180 | func=PtUpsilonPP; | |
0e137c25 | 2181 | } else if (sname == "CDF scaled") { |
2182 | func=PtUpsilonCDFscaled; | |
9ff13849 | 2183 | } else if (sname == "CDF pp") { |
2184 | func=PtUpsilonCDFscaledPP; | |
b33adf51 | 2185 | } else if (sname == "CDF pp 10") { |
2186 | func=PtUpsilonCDFscaledPP10; | |
9fd56238 | 2187 | } else if (sname == "CDF pp 8.8") { |
2188 | func=PtUpsilonCDFscaledPP9; | |
2189 | } else if (sname == "CDF pp 7") { | |
2190 | func=PtUpsilonCDFscaledPP7; | |
2191 | } else if (sname == "CDF pp 3.94") { | |
2192 | func=PtUpsilonCDFscaledPP4; | |
2193 | } else if (sname == "CDF pPb 8.8") { | |
2194 | func=PtUpsilonCDFscaledPPb9; | |
2195 | } else if (sname == "CDF Pbp 8.8") { | |
2196 | func=PtUpsilonCDFscaledPbP9; | |
2197 | } else if (sname == "CDF PbPb 3.94") { | |
2198 | func=PtUpsilonCDFscaledPbPb4; | |
4ca8d070 | 2199 | } else if (sname == "Flat") { |
2200 | func=PtUpsilonFlat; | |
05932df6 | 2201 | } else { |
2202 | func=PtUpsilon; | |
2203 | } | |
0ad09590 | 2204 | break; |
34f60c01 | 2205 | case kCharm: |
9e9ae065 | 2206 | if (sname == "F0M0S0 pp") { |
2207 | func=PtCharmF0M0S0PP; | |
2208 | } else if (sname == "F1M0S0 pp") { | |
2209 | func=PtCharmF1M0S0PP; | |
2210 | } else if (sname == "F2M0S0 pp") { | |
2211 | func=PtCharmF2M0S0PP; | |
2212 | } else if (sname == "F0M1S0 pp") { | |
2213 | func=PtCharmF0M1S0PP; | |
2214 | } else if (sname == "F0M2S0 pp") { | |
2215 | func=PtCharmF0M2S0PP; | |
2216 | } else if (sname == "F0M0S1 pp") { | |
2217 | func=PtCharmF0M0S1PP; | |
2218 | } else if (sname == "F0M0S2 pp") { | |
2219 | func=PtCharmF0M0S2PP; | |
2220 | } else if (sname == "F0M0S3 pp") { | |
2221 | func=PtCharmF0M0S3PP; | |
2222 | } else if (sname == "F0M0S4 pp") { | |
2223 | func=PtCharmF0M0S4PP; | |
2224 | } else if (sname == "F0M0S5 pp") { | |
2225 | func=PtCharmF0M0S5PP; | |
2226 | } else if (sname == "F0M0S6 pp") { | |
2227 | func=PtCharmF0M0S6PP; | |
2228 | } else if (sname == "central") { | |
bd0276a8 | 2229 | func=PtCharmCentral; |
2230 | } else { | |
2231 | func=PtCharm; | |
2232 | } | |
fe4da5cc | 2233 | break; |
34f60c01 | 2234 | case kBeauty: |
9e9ae065 | 2235 | if (sname == "F0M0S0 pp") { |
2236 | func=PtBeautyF0M0S0PP; | |
2237 | } else if (sname == "F1M0S0 pp") { | |
2238 | func=PtBeautyF1M0S0PP; | |
2239 | } else if (sname == "F2M0S0 pp") { | |
2240 | func=PtBeautyF2M0S0PP; | |
2241 | } else if (sname == "F0M1S0 pp") { | |
2242 | func=PtBeautyF0M1S0PP; | |
2243 | } else if (sname == "F0M2S0 pp") { | |
2244 | func=PtBeautyF0M2S0PP; | |
2245 | } else if (sname == "F0M0S1 pp") { | |
2246 | func=PtBeautyF0M0S1PP; | |
2247 | } else if (sname == "F0M0S2 pp") { | |
2248 | func=PtBeautyF0M0S2PP; | |
2249 | } else if (sname == "F0M0S3 pp") { | |
2250 | func=PtBeautyF0M0S3PP; | |
2251 | } else if (sname == "F0M0S4 pp") { | |
2252 | func=PtBeautyF0M0S4PP; | |
2253 | } else if (sname == "F0M0S5 pp") { | |
2254 | func=PtBeautyF0M0S5PP; | |
2255 | } else if (sname == "F0M0S6 pp") { | |
2256 | func=PtBeautyF0M0S6PP; | |
2257 | } else if (sname == "central") { | |
bd0276a8 | 2258 | func=PtBeautyCentral; |
2259 | } else { | |
2260 | func=PtBeauty; | |
2261 | } | |
fe4da5cc | 2262 | break; |
34f60c01 | 2263 | case kPion: |
753690b0 | 2264 | func=PtPion; |
2265 | break; | |
34f60c01 | 2266 | case kKaon: |
753690b0 | 2267 | func=PtKaon; |
2268 | break; | |
6b450aa0 | 2269 | case kChic0: |
2270 | func=PtChic0; | |
00935af2 | 2271 | break; |
6b450aa0 | 2272 | case kChic: |
2273 | func=PtChic; | |
00935af2 | 2274 | break; |
119b35c7 | 2275 | default: |
2276 | func=0; | |
2277 | printf("<AliGenMUONlib::GetPt> unknown parametrisation\n"); | |
fe4da5cc | 2278 | } |
2279 | return func; | |
2280 | } | |
2281 | ||
53904666 | 2282 | GenFunc AliGenMUONlib::GetY(Int_t param, const char* tname) const |
fe4da5cc | 2283 | { |
ac3faee4 | 2284 | // |
2285 | // Return pointer to y- parameterisation | |
2286 | // | |
05932df6 | 2287 | TString sname = TString(tname); |
fe4da5cc | 2288 | GenFunc func; |
753690b0 | 2289 | switch (param) |
fe4da5cc | 2290 | { |
34f60c01 | 2291 | case kPhi: |
fe4da5cc | 2292 | func=YPhi; |
2293 | break; | |
89512a3b | 2294 | case kEta: |
2295 | func=YEta; | |
2296 | break; | |
2297 | case kOmega: | |
2298 | func=YOmega; | |
2299 | break; | |
0ad09590 | 2300 | case kJpsiFamily: |
88e5db43 | 2301 | case kPsiP: |
ba8bf3f5 | 2302 | case kChic1: |
2303 | case kChic2: | |
34f60c01 | 2304 | case kJpsi: |
bb6e81ac | 2305 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2306 | func=YJpsiPbPb; |
bb6e81ac | 2307 | } else if (sname == "Vogt pp"){ |
2308 | func=YJpsiPP; | |
0e137c25 | 2309 | } else if (sname == "CDF scaled") { |
2310 | func=YJpsiCDFscaled; | |
9ff13849 | 2311 | } else if (sname == "CDF pp") { |
2312 | func=YJpsiCDFscaledPP; | |
9e9ae065 | 2313 | } else if (sname == "CDF pp 10") { |
2314 | func=YJpsiCDFscaledPP10; | |
9fd56238 | 2315 | } else if (sname == "CDF pp 8.8") { |
2316 | func=YJpsiCDFscaledPP9; | |
94a2994d | 2317 | } else if (sname == "CDF pp 7" || sname == "CDF pp 7 flat pt") { |
9fd56238 | 2318 | func=YJpsiCDFscaledPP7; |
2319 | } else if (sname == "CDF pp 3.94") { | |
2320 | func=YJpsiCDFscaledPP4; | |
2321 | } else if (sname == "CDF pPb 8.8") { | |
2322 | func=YJpsiCDFscaledPPb9; | |
2323 | } else if (sname == "CDF Pbp 8.8") { | |
2324 | func=YJpsiCDFscaledPbP9; | |
2325 | } else if (sname == "CDF PbPb 3.94") { | |
2326 | func=YJpsiCDFscaledPbPb4; | |
94a2994d | 2327 | } else if (sname == "Flat" || sname == "CDF pp 7 flat y") { |
4ca8d070 | 2328 | func=YJpsiFlat; |
05932df6 | 2329 | } else { |
2330 | func=YJpsi; | |
2331 | } | |
17d28ba5 | 2332 | break; |
2333 | case kJpsiFromB: | |
2334 | func = YJpsiBPbPb; | |
fe4da5cc | 2335 | break; |
0ad09590 | 2336 | case kUpsilonFamily: |
88e5db43 | 2337 | case kUpsilonP: |
2338 | case kUpsilonPP: | |
34f60c01 | 2339 | case kUpsilon: |
bb6e81ac | 2340 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 2341 | func=YUpsilonPbPb; |
bb6e81ac | 2342 | } else if (sname == "Vogt pp") { |
2343 | func = YUpsilonPP; | |
0e137c25 | 2344 | } else if (sname == "CDF scaled") { |
2345 | func=YUpsilonCDFscaled; | |
9ff13849 | 2346 | } else if (sname == "CDF pp") { |
2347 | func=YUpsilonCDFscaledPP; | |
b33adf51 | 2348 | } else if (sname == "CDF pp 10") { |
2349 | func=YUpsilonCDFscaledPP10; | |
9fd56238 | 2350 | } else if (sname == "CDF pp 8.8") { |
2351 | func=YUpsilonCDFscaledPP9; | |
2352 | } else if (sname == "CDF pp 7") { | |
2353 | func=YUpsilonCDFscaledPP7; | |
2354 | } else if (sname == "CDF pp 3.94") { | |
2355 | func=YUpsilonCDFscaledPP4; | |
2356 | } else if (sname == "CDF pPb 8.8") { | |
2357 | func=YUpsilonCDFscaledPPb9; | |
2358 | } else if (sname == "CDF Pbp 8.8") { | |
2359 | func=YUpsilonCDFscaledPbP9; | |
2360 | } else if (sname == "CDF PbPb 3.94") { | |
2361 | func=YUpsilonCDFscaledPbPb4; | |
4ca8d070 | 2362 | } else if (sname == "Flat") { |
2363 | func=YUpsilonFlat; | |
05932df6 | 2364 | } else { |
2365 | func=YUpsilon; | |
2366 | } | |
fe4da5cc | 2367 | break; |
34f60c01 | 2368 | case kCharm: |
9e9ae065 | 2369 | if (sname == "F0M0S0 pp") { |
2370 | func=YCharmF0M0S0PP; | |
2371 | } else if (sname == "F1M0S0 pp") { | |
2372 | func=YCharmF1M0S0PP; | |
2373 | } else if (sname == "F2M0S0 pp") { | |
2374 | func=YCharmF2M0S0PP; | |
2375 | } else if (sname == "F0M1S0 pp") { | |
2376 | func=YCharmF0M1S0PP; | |
2377 | } else if (sname == "F0M2S0 pp") { | |
2378 | func=YCharmF0M2S0PP; | |
2379 | } else if (sname == "F0M0S1 pp") { | |
2380 | func=YCharmF0M0S1PP; | |
2381 | } else if (sname == "F0M0S2 pp") { | |
2382 | func=YCharmF0M0S2PP; | |
2383 | } else if (sname == "F0M0S3 pp") { | |
2384 | func=YCharmF0M0S3PP; | |
2385 | } else if (sname == "F0M0S4 pp") { | |
2386 | func=YCharmF0M0S4PP; | |
2387 | } else if (sname == "F0M0S5 pp") { | |
2388 | func=YCharmF0M0S5PP; | |
2389 | } else if (sname == "F0M0S6 pp") { | |
2390 | func=YCharmF0M0S6PP; | |
2391 | } else { | |
2392 | func=YCharm; | |
2393 | } | |
fe4da5cc | 2394 | break; |
34f60c01 | 2395 | case kBeauty: |
9e9ae065 | 2396 | if (sname == "F0M0S0 pp") { |
2397 | func=YBeautyF0M0S0PP; | |
2398 | } else if (sname == "F1M0S0 pp") { | |
2399 | func=YBeautyF1M0S0PP; | |
2400 | } else if (sname == "F2M0S0 pp") { | |
2401 | func=YBeautyF2M0S0PP; | |
2402 | } else if (sname == "F0M1S0 pp") { | |
2403 | func=YBeautyF0M1S0PP; | |
2404 | } else if (sname == "F0M2S0 pp") { | |
2405 | func=YBeautyF0M2S0PP; | |
2406 | } else if (sname == "F0M0S1 pp") { | |
2407 | func=YBeautyF0M0S1PP; | |
2408 | } else if (sname == "F0M0S2 pp") { | |
2409 | func=YBeautyF0M0S2PP; | |
2410 | } else if (sname == "F0M0S3 pp") { | |
2411 | func=YBeautyF0M0S3PP; | |
2412 | } else if (sname == "F0M0S4 pp") { | |
2413 | func=YBeautyF0M0S4PP; | |
2414 | } else if (sname == "F0M0S5 pp") { | |
2415 | func=YBeautyF0M0S5PP; | |
2416 | } else if (sname == "F0M0S6 pp") { | |
2417 | func=YBeautyF0M0S6PP; | |
2418 | } else { | |
2419 | func=YBeauty; | |
2420 | } | |
fe4da5cc | 2421 | break; |
34f60c01 | 2422 | case kPion: |
753690b0 | 2423 | func=YPion; |
2424 | break; | |
34f60c01 | 2425 | case kKaon: |
753690b0 | 2426 | func=YKaon; |
2427 | break; | |
6b450aa0 | 2428 | case kChic0: |
2429 | func=YChic0; | |
00935af2 | 2430 | break; |
6b450aa0 | 2431 | case kChic: |
2432 | func=YChic; | |
00935af2 | 2433 | break; |
119b35c7 | 2434 | default: |
2435 | func=0; | |
2436 | printf("<AliGenMUONlib::GetY> unknown parametrisation\n"); | |
fe4da5cc | 2437 | } |
2438 | return func; | |
2439 | } | |
00935af2 | 2440 | |
2441 | // | |
2442 | // Chi | |
2443 | // | |
2444 | // | |
2445 | // pt-distribution | |
2446 | //____________________________________________________________ | |
75e0cc59 | 2447 | Double_t AliGenMUONlib::PtChic0( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2448 | { |
2449 | // Chi_c1 pT | |
2450 | const Double_t kpt0 = 4.; | |
2451 | const Double_t kxn = 3.6; | |
2452 | Double_t x=*px; | |
2453 | // | |
2454 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2455 | return x/TMath::Power(pass1,kxn); | |
2456 | } | |
75e0cc59 | 2457 | Double_t AliGenMUONlib::PtChic1( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2458 | { |
2459 | // Chi_c1 pT | |
2460 | const Double_t kpt0 = 4.; | |
2461 | const Double_t kxn = 3.6; | |
2462 | Double_t x=*px; | |
2463 | // | |
2464 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2465 | return x/TMath::Power(pass1,kxn); | |
2466 | } | |
75e0cc59 | 2467 | Double_t AliGenMUONlib::PtChic2( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2468 | { |
2469 | // Chi_c2 pT | |
2470 | const Double_t kpt0 = 4.; | |
2471 | const Double_t kxn = 3.6; | |
2472 | Double_t x=*px; | |
2473 | // | |
2474 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2475 | return x/TMath::Power(pass1,kxn); | |
2476 | } | |
75e0cc59 | 2477 | Double_t AliGenMUONlib::PtChic( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2478 | { |
2479 | // Chi_c family pT | |
2480 | const Double_t kpt0 = 4.; | |
2481 | const Double_t kxn = 3.6; | |
2482 | Double_t x=*px; | |
2483 | // | |
2484 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2485 | return x/TMath::Power(pass1,kxn); | |
2486 | } | |
2487 | ||
2488 | // | |
2489 | // y-distribution | |
2490 | //____________________________________________________________ | |
75e0cc59 | 2491 | Double_t AliGenMUONlib::YChic0(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2492 | { |
2493 | // Chi-1c y | |
2494 | const Double_t ky0 = 4.; | |
2495 | const Double_t kb=1.; | |
2496 | Double_t yj; | |
2497 | Double_t y=TMath::Abs(*py); | |
2498 | // | |
2499 | if (y < ky0) | |
2500 | yj=kb; | |
2501 | else | |
2502 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2503 | return yj; | |
2504 | } | |
2505 | ||
75e0cc59 | 2506 | Double_t AliGenMUONlib::YChic1(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2507 | { |
2508 | // Chi-1c y | |
2509 | const Double_t ky0 = 4.; | |
2510 | const Double_t kb=1.; | |
2511 | Double_t yj; | |
2512 | Double_t y=TMath::Abs(*py); | |
2513 | // | |
2514 | if (y < ky0) | |
2515 | yj=kb; | |
2516 | else | |
2517 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2518 | return yj; | |
2519 | } | |
2520 | ||
75e0cc59 | 2521 | Double_t AliGenMUONlib::YChic2(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2522 | { |
2523 | // Chi-2c y | |
2524 | const Double_t ky0 = 4.; | |
2525 | const Double_t kb=1.; | |
2526 | Double_t yj; | |
2527 | Double_t y=TMath::Abs(*py); | |
2528 | // | |
2529 | if (y < ky0) | |
2530 | yj=kb; | |
2531 | else | |
2532 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2533 | return yj; | |
2534 | } | |
2535 | ||
75e0cc59 | 2536 | Double_t AliGenMUONlib::YChic(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2537 | { |
2538 | // Chi_c family y | |
2539 | const Double_t ky0 = 4.; | |
2540 | const Double_t kb=1.; | |
2541 | Double_t yj; | |
2542 | Double_t y=TMath::Abs(*py); | |
2543 | // | |
2544 | if (y < ky0) | |
2545 | yj=kb; | |
2546 | else | |
2547 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2548 | return yj; | |
2549 | } | |
2550 | ||
2551 | // particle composition | |
2552 | // | |
6b450aa0 | 2553 | Int_t AliGenMUONlib::IpChic0(TRandom *) |
00935af2 | 2554 | { |
2555 | // Chi composition | |
2556 | return 10441; | |
2557 | } | |
2558 | // | |
6b450aa0 | 2559 | Int_t AliGenMUONlib::IpChic1(TRandom *) |
00935af2 | 2560 | { |
2561 | // Chi composition | |
2562 | return 20443; | |
2563 | } | |
6b450aa0 | 2564 | Int_t AliGenMUONlib::IpChic2(TRandom *) |
00935af2 | 2565 | { |
2566 | // Chi_c2 prime composition | |
2567 | return 445; | |
2568 | } | |
6b450aa0 | 2569 | Int_t AliGenMUONlib::IpChic(TRandom *) |
00935af2 | 2570 | { |
2571 | // Chi composition | |
2572 | Int_t ip; | |
2573 | Float_t r = gRandom->Rndm(); | |
2574 | if (r < 0.001) { | |
2575 | ip = 10441; | |
2576 | } else if( r < 0.377 ) { | |
2577 | ip = 20443; | |
2578 | } else { | |
2579 | ip = 445; | |
2580 | } | |
2581 | return ip; | |
2582 | } | |
2583 | ||
2584 | ||
2585 | //_____________________________________________________________ | |
2586 | ||
65fb704d | 2587 | typedef Int_t (*GenFuncIp) (TRandom *); |
198bb1c7 | 2588 | GenFuncIp AliGenMUONlib::GetIp(Int_t param, const char* /*tname*/) const |
fe4da5cc | 2589 | { |
d90f80fd | 2590 | // Return pointer to particle type parameterisation |
fe4da5cc | 2591 | GenFuncIp func; |
753690b0 | 2592 | switch (param) |
fe4da5cc | 2593 | { |
34f60c01 | 2594 | case kPhi: |
fe4da5cc | 2595 | func=IpPhi; |
2596 | break; | |
89512a3b | 2597 | case kEta: |
2598 | func=IpEta; | |
2599 | break; | |
2600 | case kOmega: | |
2601 | func=IpOmega; | |
2602 | break; | |
0ad09590 | 2603 | case kJpsiFamily: |
2604 | func=IpJpsiFamily; | |
2605 | break; | |
88e5db43 | 2606 | case kPsiP: |
2607 | func=IpPsiP; | |
2608 | break; | |
34f60c01 | 2609 | case kJpsi: |
17d28ba5 | 2610 | case kJpsiFromB: |
fe4da5cc | 2611 | func=IpJpsi; |
2612 | break; | |
34f60c01 | 2613 | case kUpsilon: |
fe4da5cc | 2614 | func=IpUpsilon; |
2615 | break; | |
0ad09590 | 2616 | case kUpsilonFamily: |
2617 | func=IpUpsilonFamily; | |
2618 | break; | |
88e5db43 | 2619 | case kUpsilonP: |
2620 | func=IpUpsilonP; | |
2621 | break; | |
2622 | case kUpsilonPP: | |
2623 | func=IpUpsilonPP; | |
2624 | break; | |
34f60c01 | 2625 | case kCharm: |
fe4da5cc | 2626 | func=IpCharm; |
2627 | break; | |
34f60c01 | 2628 | case kBeauty: |
fe4da5cc | 2629 | func=IpBeauty; |
2630 | break; | |
34f60c01 | 2631 | case kPion: |
753690b0 | 2632 | func=IpPion; |
2633 | break; | |
34f60c01 | 2634 | case kKaon: |
753690b0 | 2635 | func=IpKaon; |
2636 | break; | |
6b450aa0 | 2637 | case kChic0: |
2638 | func=IpChic0; | |
00935af2 | 2639 | break; |
6b450aa0 | 2640 | case kChic1: |
2641 | func=IpChic1; | |
00935af2 | 2642 | break; |
6b450aa0 | 2643 | case kChic2: |
2644 | func=IpChic2; | |
00935af2 | 2645 | break; |
6b450aa0 | 2646 | case kChic: |
2647 | func=IpChic; | |
00935af2 | 2648 | break; |
119b35c7 | 2649 | default: |
2650 | func=0; | |
2651 | printf("<AliGenMUONlib::GetIp> unknown parametrisation\n"); | |
fe4da5cc | 2652 | } |
2653 | return func; | |
2654 | } | |
2655 | ||
2656 | ||
753690b0 | 2657 | |
05932df6 | 2658 | Float_t AliGenMUONlib::Interpolate(Float_t x, Float_t* y, Float_t x0, |
2659 | Float_t dx, | |
2660 | Int_t n, Int_t no) | |
2661 | { | |
2662 | // | |
2663 | // Neville's alorithm for interpolation | |
2664 | // | |
2665 | // x: x-value | |
2666 | // y: Input array | |
2667 | // x0: minimum x | |
2668 | // dx: step size | |
2669 | // n: number of data points | |
2670 | // no: order of polynom | |
2671 | // | |
2672 | Float_t* c = new Float_t[n]; | |
2673 | Float_t* d = new Float_t[n]; | |
2674 | Int_t m, i; | |
2675 | for (i = 0; i < n; i++) { | |
2676 | c[i] = y[i]; | |
2677 | d[i] = y[i]; | |
2678 | } | |
2679 | ||
2680 | Int_t ns = int((x - x0)/dx); | |
2681 | ||
2682 | Float_t y1 = y[ns]; | |
2683 | ns--; | |
2684 | for (m = 0; m < no; m++) { | |
2685 | for (i = 0; i < n-m; i++) { | |
2686 | Float_t ho = x0 + Float_t(i) * dx - x; | |
2687 | Float_t hp = x0 + Float_t(i+m+1) * dx - x; | |
2688 | Float_t w = c[i+1] - d[i]; | |
2689 | Float_t den = ho-hp; | |
2690 | den = w/den; | |
2691 | d[i] = hp * den; | |
2692 | c[i] = ho * den; | |
2693 | } | |
2694 | Float_t dy; | |
2695 | ||
2696 | if (2*ns < (n-m-1)) { | |
2697 | dy = c[ns+1]; | |
2698 | } else { | |
2699 | dy = d[ns--]; | |
2700 | } | |
2701 | y1 += dy;} | |
2702 | delete[] c; | |
2703 | delete[] d; | |
2704 | ||
2705 | return y1; | |
2706 | } | |
2707 | ||
753690b0 | 2708 |