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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::PtJpsiCDFscaledold( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 182 | { |
183 | // J/Psi pT | |
184 | // | |
185 | // PbPb 5.5 TeV | |
186 | // scaled from CDF "old" data at 2 TeV | |
187 | ||
48416d65 | 188 | const Double_t kpt0 = 4.703; |
189 | const Double_t kxn = 3.826; | |
0e137c25 | 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::PtJpsiCDFscaledPP( const Double_t *px, const Double_t */*dummy*/) |
9ff13849 | 197 | { |
198 | // J/Psi pT | |
199 | // | |
200 | // pp 14 TeV | |
9ff13849 | 201 | // scaled from CDF data at 2 TeV |
202 | ||
9e9ae065 | 203 | const Double_t kpt0 = 5.630; |
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 | ||
75e0cc59 | 211 | Double_t AliGenMUONlib::PtJpsiCDFscaledPPold( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 212 | { |
213 | // J/Psi pT | |
214 | // | |
215 | // pp 14 TeV | |
216 | // scaled from CDF "old" data at 2 TeV | |
217 | ||
9ff13849 | 218 | const Double_t kpt0 = 5.355; |
219 | const Double_t kxn = 3.821; | |
220 | Double_t x=*px; | |
221 | // | |
222 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
223 | return x/TMath::Power(pass1,kxn); | |
224 | } | |
225 | ||
75e0cc59 | 226 | Double_t AliGenMUONlib::PtJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 227 | { |
228 | // J/Psi pT | |
229 | // | |
230 | // pp 10 TeV | |
231 | // scaled from CDF data at 2 TeV | |
232 | ||
233 | const Double_t kpt0 = 5.334; | |
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 | ||
75e0cc59 | 241 | Double_t AliGenMUONlib::PtJpsiFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 242 | { |
243 | return 1.; | |
244 | } | |
245 | ||
75e0cc59 | 246 | Double_t AliGenMUONlib::PtJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 247 | { |
1af7144e | 248 | // J/Psi pT spectrum |
05932df6 | 249 | // |
250 | // R. Vogt 2002 | |
251 | // PbPb 5.5 TeV | |
252 | // MRST HO | |
253 | // mc = 1.4 GeV, pt-kick 1 GeV | |
254 | // | |
1af7144e | 255 | Float_t x = px[0]; |
256 | Float_t c[8] = { | |
257 | -2.13098e+00, 9.46552e+00, -5.06799e+00, 1.27260e+00, | |
258 | -1.83806e-01, 1.55853e-02, -7.23241e-04, 1.42105e-05 | |
05932df6 | 259 | }; |
1af7144e | 260 | |
3d905dd7 | 261 | Double_t y; |
36349df1 | 262 | if (x < 10.) { |
3d905dd7 | 263 | Int_t j; |
264 | y = c[j = 7]; | |
265 | while (j > 0) y = y * x +c[--j]; | |
266 | y = x * TMath::Exp(y); | |
267 | } else { | |
268 | y = 0.; | |
269 | } | |
1af7144e | 270 | return y; |
05932df6 | 271 | } |
17d28ba5 | 272 | |
75e0cc59 | 273 | Double_t AliGenMUONlib::PtJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 274 | { |
275 | // J/Psi pT spectrum | |
276 | // B -> J/Psi X | |
277 | Double_t x0 = 4.0384; | |
278 | Double_t n = 3.0288; | |
279 | ||
280 | Double_t x = px[0]; | |
281 | Double_t y = x / TMath::Power((1. + (x/x0)*(x/x0)), n); | |
282 | ||
283 | return y; | |
284 | } | |
285 | ||
286 | ||
75e0cc59 | 287 | Double_t AliGenMUONlib::PtJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 288 | { |
289 | // J/Psi pT spectrum | |
290 | // | |
291 | // R. Vogt 2002 | |
292 | // pp 14 TeV | |
293 | // MRST HO | |
294 | // mc = 1.4 GeV, pt-kick 1 GeV | |
295 | // | |
296 | Float_t x = px[0]; | |
297 | Float_t c[4] = {8.47471e+00, -1.93567e+00, 1.50271e-01, -5.51212e-03}; | |
298 | ||
299 | Double_t y; | |
300 | if (x < 10.) { | |
301 | Int_t j; | |
302 | y = c[j = 3]; | |
303 | while (j > 0) y = y * x +c[--j]; | |
304 | y = x * TMath::Exp(y); | |
305 | } else { | |
306 | y = 0.; | |
307 | } | |
308 | return y; | |
309 | } | |
310 | ||
fe4da5cc | 311 | // |
312 | // y-distribution | |
313 | //____________________________________________________________ | |
75e0cc59 | 314 | Double_t AliGenMUONlib::YJpsi(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 315 | { |
d90f80fd | 316 | // J/psi y |
317 | const Double_t ky0 = 4.; | |
318 | const Double_t kb=1.; | |
fe4da5cc | 319 | Double_t yj; |
320 | Double_t y=TMath::Abs(*py); | |
321 | // | |
d90f80fd | 322 | if (y < ky0) |
323 | yj=kb; | |
fe4da5cc | 324 | else |
d90f80fd | 325 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 326 | return yj; |
327 | } | |
05932df6 | 328 | |
75e0cc59 | 329 | Double_t AliGenMUONlib::YJpsiFlat( const Double_t */*py*/, const Double_t */*dummy*/ ) |
4ca8d070 | 330 | { |
331 | return 1.; | |
332 | } | |
333 | ||
05932df6 | 334 | |
75e0cc59 | 335 | Double_t AliGenMUONlib::YJpsiPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 336 | { |
337 | ||
338 | // | |
339 | // J/Psi y | |
340 | // | |
341 | // | |
342 | // R. Vogt 2002 | |
343 | // PbPb 5.5 TeV | |
344 | // MRST HO | |
345 | // mc = 1.4 GeV, pt-kick 1 GeV | |
346 | // | |
1af7144e | 347 | Double_t c[5] = {-6.03425e+02, 4.98257e+02, -1.38794e+02, 1.62209e+01, -6.85955e-01}; |
348 | Double_t x = TMath::Abs(px[0]); | |
349 | Double_t y; | |
350 | ||
351 | if (x < 4.) { | |
352 | y = 31.754; | |
353 | } else if (x < 6) { | |
354 | Int_t j; | |
355 | y = c[j = 4]; | |
356 | while (j > 0) y = y * x + c[--j]; | |
357 | } else { | |
358 | y =0.; | |
359 | } | |
360 | ||
361 | return y; | |
05932df6 | 362 | } |
363 | ||
75e0cc59 | 364 | Double_t AliGenMUONlib::YJpsiCDFscaled( const Double_t *px, const Double_t* dummy) |
0e137c25 | 365 | { |
366 | // J/Psi y | |
367 | return AliGenMUONlib::YJpsiPbPb(px, dummy); | |
368 | } | |
369 | ||
75e0cc59 | 370 | Double_t AliGenMUONlib::YJpsiCDFscaledold( const Double_t *px, const Double_t* dummy) |
9e9ae065 | 371 | { |
372 | // J/Psi y | |
373 | return AliGenMUONlib::YJpsiPbPb(px, dummy); | |
374 | } | |
375 | ||
75e0cc59 | 376 | Double_t AliGenMUONlib::YJpsiCDFscaledPP( const Double_t *px, const Double_t* dummy) |
9ff13849 | 377 | { |
378 | // J/Psi y | |
379 | return AliGenMUONlib::YJpsiPP(px, dummy); | |
380 | } | |
0e137c25 | 381 | |
75e0cc59 | 382 | Double_t AliGenMUONlib::YJpsiCDFscaledPPold( const Double_t *px, const Double_t* dummy) |
9e9ae065 | 383 | { |
384 | // J/Psi y | |
385 | return AliGenMUONlib::YJpsiPP(px, dummy); | |
386 | } | |
387 | ||
75e0cc59 | 388 | Double_t AliGenMUONlib::YJpsiCDFscaledPP10( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 389 | { |
390 | ||
391 | // | |
392 | // J/Psi y | |
393 | // | |
394 | // pp 10 TeV | |
395 | // scaled from YJpsiPP(14 TeV) using 10 TeV / 14 TeV ratio of y-spectra in LO pQCD. | |
396 | // see S.Grigoryan, PWG3 Meeting, 27th Oct 2008 | |
397 | // | |
398 | ||
399 | Double_t c[5] = {2.46681e+01, 8.91486e+01, -3.21227e+01, 3.63075e+00, -1.32047e-01}; | |
400 | ||
401 | Double_t x = TMath::Abs(px[0]); | |
402 | Double_t y; | |
403 | ||
404 | if (x < 3.2) { | |
405 | y = 98.523 - 1.3664 * x * x; | |
406 | } else if (x < 7.5) { | |
407 | Int_t j; | |
408 | y = c[j = 4]; | |
409 | while (j > 0) y = y * x + c[--j]; | |
410 | } else { | |
411 | y =0.; | |
412 | } | |
413 | ||
414 | if(y<0) y=0; | |
415 | ||
416 | return y; | |
417 | } | |
418 | ||
75e0cc59 | 419 | Double_t AliGenMUONlib::YJpsiPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 420 | { |
421 | ||
422 | // | |
423 | // J/Psi y | |
424 | // | |
425 | // | |
426 | // R. Vogt 2002 | |
427 | // pp 14 TeV | |
428 | // MRST HO | |
429 | // mc = 1.4 GeV, pt-kick 1 GeV | |
430 | // | |
431 | ||
432 | Double_t c[5] = {1.38532e+00, 1.00596e+02, -3.46378e+01, 3.94172e+00, -1.48319e-01}; | |
433 | Double_t x = TMath::Abs(px[0]); | |
434 | Double_t y; | |
435 | ||
436 | if (x < 2.5) { | |
437 | y = 96.455 - 0.8483 * x * x; | |
438 | } else if (x < 7.9) { | |
439 | Int_t j; | |
440 | y = c[j = 4]; | |
441 | while (j > 0) y = y * x + c[--j]; | |
442 | } else { | |
443 | y =0.; | |
444 | } | |
445 | ||
446 | return y; | |
447 | } | |
448 | ||
75e0cc59 | 449 | Double_t AliGenMUONlib::YJpsiBPbPb( const Double_t *px, const Double_t */*dummy*/) |
17d28ba5 | 450 | { |
451 | ||
452 | // | |
453 | // J/Psi from B->J/Psi X | |
454 | // | |
455 | // | |
456 | ||
457 | ||
458 | Double_t c[7] = {7.37025e-02, 0., -2.94487e-03, 0., 6.07953e-06, 0., 5.39219e-07}; | |
459 | ||
460 | Double_t x = TMath::Abs(px[0]); | |
461 | Double_t y; | |
462 | ||
463 | if (x > 6.) { | |
464 | y = 0.; | |
465 | } else { | |
466 | Int_t j; | |
467 | y = c[j = 6]; | |
468 | while (j > 0) y = y * x + c[--j]; | |
469 | } | |
470 | ||
471 | return y; | |
472 | } | |
473 | ||
474 | ||
475 | ||
fe4da5cc | 476 | // particle composition |
477 | // | |
65fb704d | 478 | Int_t AliGenMUONlib::IpJpsi(TRandom *) |
fe4da5cc | 479 | { |
d90f80fd | 480 | // J/Psi composition |
88cb7938 | 481 | return 443; |
fe4da5cc | 482 | } |
88e5db43 | 483 | Int_t AliGenMUONlib::IpPsiP(TRandom *) |
484 | { | |
485 | // Psi prime composition | |
486 | return 100443; | |
487 | } | |
0ad09590 | 488 | Int_t AliGenMUONlib::IpJpsiFamily(TRandom *) |
489 | { | |
490 | // J/Psi composition | |
491 | Int_t ip; | |
492 | Float_t r = gRandom->Rndm(); | |
493 | if (r < 0.98) { | |
494 | ip = 443; | |
495 | } else { | |
496 | ip = 100443; | |
497 | } | |
498 | return ip; | |
499 | } | |
500 | ||
fe4da5cc | 501 | |
88e5db43 | 502 | |
fe4da5cc | 503 | // Upsilon |
504 | // | |
505 | // | |
506 | // pt-distribution | |
507 | //____________________________________________________________ | |
75e0cc59 | 508 | Double_t AliGenMUONlib::PtUpsilon( const Double_t *px, const Double_t */*dummy*/ ) |
fe4da5cc | 509 | { |
d90f80fd | 510 | // Upsilon pT |
511 | const Double_t kpt0 = 5.3; | |
512 | const Double_t kxn = 2.5; | |
fe4da5cc | 513 | Double_t x=*px; |
514 | // | |
d90f80fd | 515 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
516 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 517 | } |
05932df6 | 518 | |
75e0cc59 | 519 | Double_t AliGenMUONlib::PtUpsilonCDFscaled( const Double_t *px, const Double_t */*dummy*/ ) |
0e137c25 | 520 | { |
521 | // Upsilon pT | |
48416d65 | 522 | const Double_t kpt0 = 7.753; |
523 | const Double_t kxn = 3.042; | |
0e137c25 | 524 | Double_t x=*px; |
525 | // | |
526 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
527 | return x/TMath::Power(pass1,kxn); | |
528 | } | |
529 | ||
75e0cc59 | 530 | Double_t AliGenMUONlib::PtUpsilonCDFscaledPP( const Double_t *px, const Double_t */*dummy*/ ) |
9ff13849 | 531 | { |
532 | // Upsilon pT | |
533 | // | |
534 | // pp 14 TeV | |
535 | // | |
536 | // scaled from CDF data at 2 TeV | |
537 | ||
538 | const Double_t kpt0 = 8.610; | |
539 | const Double_t kxn = 3.051; | |
540 | Double_t x=*px; | |
541 | // | |
542 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
543 | return x/TMath::Power(pass1,kxn); | |
544 | } | |
545 | ||
75e0cc59 | 546 | Double_t AliGenMUONlib::PtUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/ ) |
4ca8d070 | 547 | { |
548 | return 1.; | |
549 | } | |
550 | ||
75e0cc59 | 551 | Double_t AliGenMUONlib::PtUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 552 | { |
553 | ||
554 | // | |
555 | // Upsilon pT | |
556 | // | |
557 | // | |
558 | // R. Vogt 2002 | |
559 | // PbPb 5.5 TeV | |
560 | // MRST HO | |
561 | // mc = 1.4 GeV, pt-kick 1 GeV | |
562 | // | |
1af7144e | 563 | Float_t x = px[0]; |
564 | Double_t c[8] = { | |
565 | -1.03488e+01, 1.28065e+01, -6.60500e+00, 1.66140e+00, | |
566 | -2.34293e-01, 1.86925e-02, -7.80708e-04, 1.30610e-05 | |
567 | }; | |
3d905dd7 | 568 | Double_t y; |
569 | if (x < 10.) { | |
570 | Int_t j; | |
571 | y = c[j = 7]; | |
572 | while (j > 0) y = y * x +c[--j]; | |
573 | y = x * TMath::Exp(y); | |
574 | } else { | |
575 | y = 0.; | |
576 | } | |
1af7144e | 577 | return y; |
05932df6 | 578 | } |
579 | ||
75e0cc59 | 580 | Double_t AliGenMUONlib::PtUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 581 | { |
582 | ||
583 | // | |
584 | // Upsilon pT | |
585 | // | |
586 | // | |
587 | // R. Vogt 2002 | |
588 | // pp 14 TeV | |
589 | // MRST HO | |
590 | // mc = 1.4 GeV, pt-kick 1 GeV | |
591 | // | |
592 | Float_t x = px[0]; | |
593 | Double_t c[8] = {-7.93955e+00, 1.06306e+01, -5.21392e+00, 1.19703e+00, | |
594 | -1.45718e-01, 8.95151e-03, -2.04806e-04, -1.13053e-06}; | |
595 | ||
596 | Double_t y; | |
597 | if (x < 10.) { | |
598 | Int_t j; | |
599 | y = c[j = 7]; | |
600 | while (j > 0) y = y * x +c[--j]; | |
601 | y = x * TMath::Exp(y); | |
602 | } else { | |
603 | y = 0.; | |
604 | } | |
605 | return y; | |
606 | } | |
607 | ||
fe4da5cc | 608 | // |
609 | // y-distribution | |
610 | // | |
611 | //____________________________________________________________ | |
75e0cc59 | 612 | Double_t AliGenMUONlib::YUpsilon(const Double_t *py, const Double_t */*dummy*/) |
fe4da5cc | 613 | { |
d90f80fd | 614 | // Upsilon y |
615 | const Double_t ky0 = 3.; | |
616 | const Double_t kb=1.; | |
fe4da5cc | 617 | Double_t yu; |
618 | Double_t y=TMath::Abs(*py); | |
619 | // | |
d90f80fd | 620 | if (y < ky0) |
621 | yu=kb; | |
fe4da5cc | 622 | else |
d90f80fd | 623 | yu=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); |
fe4da5cc | 624 | return yu; |
625 | } | |
05932df6 | 626 | |
627 | ||
75e0cc59 | 628 | Double_t AliGenMUONlib::YUpsilonPbPb( const Double_t *px, const Double_t */*dummy*/) |
05932df6 | 629 | { |
630 | ||
631 | // | |
632 | // Upsilon y | |
633 | // | |
634 | // | |
635 | // R. Vogt 2002 | |
636 | // PbPb 5.5 TeV | |
637 | // MRST HO | |
638 | // mc = 1.4 GeV, pt-kick 1 GeV | |
639 | // | |
640 | ||
1af7144e | 641 | Double_t c[7] = {3.40036e-01, -3.98882e-07, -4.48398e-03, 8.46411e-08, -6.10854e-04, |
642 | -2.99753e-09, 1.28895e-05}; | |
643 | ||
644 | Double_t x = px[0]; | |
645 | if (TMath::Abs(x) > 5.55) return 0.; | |
646 | Int_t j; | |
647 | Double_t y = c[j = 6]; | |
648 | while (j > 0) y = y * x +c[--j]; | |
649 | return y; | |
05932df6 | 650 | } |
651 | ||
75e0cc59 | 652 | Double_t AliGenMUONlib::YUpsilonCDFscaled( const Double_t *px, const Double_t *dummy) |
0e137c25 | 653 | { |
654 | // Upsilon y | |
655 | return AliGenMUONlib::YUpsilonPbPb(px, dummy); | |
656 | ||
4ca8d070 | 657 | } |
9ff13849 | 658 | |
75e0cc59 | 659 | Double_t AliGenMUONlib::YUpsilonCDFscaledPP( const Double_t *px, const Double_t *dummy) |
9ff13849 | 660 | { |
661 | // Upsilon y | |
662 | return AliGenMUONlib::YUpsilonPP(px, dummy); | |
663 | ||
664 | } | |
665 | ||
75e0cc59 | 666 | Double_t AliGenMUONlib::YUpsilonFlat( const Double_t */*px*/, const Double_t */*dummy*/) |
4ca8d070 | 667 | { |
668 | // Upsilon y | |
669 | return 1.; | |
670 | ||
0e137c25 | 671 | } |
672 | ||
75e0cc59 | 673 | Double_t AliGenMUONlib::YUpsilonPP( const Double_t *px, const Double_t */*dummy*/) |
bb6e81ac | 674 | { |
675 | ||
676 | // | |
677 | // Upsilon y | |
678 | // | |
679 | // | |
680 | // R. Vogt 2002 | |
681 | // p p 14. TeV | |
682 | // MRST HO | |
683 | // mc = 1.4 GeV, pt-kick 1 GeV | |
684 | // | |
685 | Double_t c[7] = {8.91936e-01, -6.46645e-07, -1.52774e-02, 4.28677e-08, -7.01517e-04, | |
686 | -6.20539e-10, 1.29943e-05}; | |
687 | ||
688 | Double_t x = px[0]; | |
689 | if (TMath::Abs(x) > 6.2) return 0.; | |
690 | Int_t j; | |
691 | Double_t y = c[j = 6]; | |
692 | while (j > 0) y = y * x +c[--j]; | |
693 | return y; | |
694 | } | |
695 | ||
fe4da5cc | 696 | // particle composition |
697 | // | |
65fb704d | 698 | Int_t AliGenMUONlib::IpUpsilon(TRandom *) |
fe4da5cc | 699 | { |
d90f80fd | 700 | // y composition |
88cb7938 | 701 | return 553; |
fe4da5cc | 702 | } |
88e5db43 | 703 | Int_t AliGenMUONlib::IpUpsilonP(TRandom *) |
704 | { | |
705 | // y composition | |
706 | return 100553; | |
707 | } | |
708 | Int_t AliGenMUONlib::IpUpsilonPP(TRandom *) | |
709 | { | |
710 | // y composition | |
711 | return 200553; | |
712 | } | |
0ad09590 | 713 | Int_t AliGenMUONlib::IpUpsilonFamily(TRandom *) |
714 | { | |
715 | // y composition | |
716 | Int_t ip; | |
717 | Float_t r = gRandom->Rndm(); | |
718 | ||
719 | if (r < 0.712) { | |
720 | ip = 553; | |
721 | } else if (r < 0.896) { | |
722 | ip = 100553; | |
723 | } else { | |
724 | ip = 200553; | |
725 | } | |
726 | return ip; | |
727 | } | |
fe4da5cc | 728 | |
88e5db43 | 729 | |
fe4da5cc | 730 | // |
731 | // Phi | |
732 | // | |
733 | // | |
734 | // pt-distribution (by scaling of pion distribution) | |
735 | //____________________________________________________________ | |
75e0cc59 | 736 | Double_t AliGenMUONlib::PtPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 737 | { |
d90f80fd | 738 | // Phi pT |
fe4da5cc | 739 | return PtScal(*px,7); |
740 | } | |
741 | // y-distribution | |
75e0cc59 | 742 | Double_t AliGenMUONlib::YPhi( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 743 | { |
d90f80fd | 744 | // Phi y |
745 | Double_t *dum=0; | |
746 | return YJpsi(px,dum); | |
fe4da5cc | 747 | } |
748 | // particle composition | |
749 | // | |
65fb704d | 750 | Int_t AliGenMUONlib::IpPhi(TRandom *) |
fe4da5cc | 751 | { |
d90f80fd | 752 | // Phi composition |
89512a3b | 753 | return 333; |
754 | } | |
755 | ||
756 | // | |
757 | // omega | |
758 | // | |
759 | // | |
760 | // pt-distribution (by scaling of pion distribution) | |
761 | //____________________________________________________________ | |
75e0cc59 | 762 | Double_t AliGenMUONlib::PtOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 763 | { |
764 | // Omega pT | |
765 | return PtScal(*px,5); | |
766 | } | |
767 | // y-distribution | |
75e0cc59 | 768 | Double_t AliGenMUONlib::YOmega( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 769 | { |
770 | // Omega y | |
771 | Double_t *dum=0; | |
772 | return YJpsi(px,dum); | |
773 | } | |
774 | // particle composition | |
775 | // | |
776 | Int_t AliGenMUONlib::IpOmega(TRandom *) | |
777 | { | |
778 | // Omega composition | |
779 | return 223; | |
780 | } | |
781 | ||
782 | ||
783 | // | |
784 | // Eta | |
785 | // | |
786 | // | |
787 | // pt-distribution (by scaling of pion distribution) | |
788 | //____________________________________________________________ | |
75e0cc59 | 789 | Double_t AliGenMUONlib::PtEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 790 | { |
791 | // Eta pT | |
792 | return PtScal(*px,3); | |
793 | } | |
794 | // y-distribution | |
75e0cc59 | 795 | Double_t AliGenMUONlib::YEta( const Double_t *px, const Double_t */*dummy*/) |
89512a3b | 796 | { |
797 | // Eta y | |
798 | Double_t *dum=0; | |
799 | return YJpsi(px,dum); | |
800 | } | |
801 | // particle composition | |
802 | // | |
803 | Int_t AliGenMUONlib::IpEta(TRandom *) | |
804 | { | |
805 | // Eta composition | |
806 | return 221; | |
fe4da5cc | 807 | } |
808 | ||
809 | // | |
810 | // Charm | |
811 | // | |
812 | // | |
813 | // pt-distribution | |
814 | //____________________________________________________________ | |
75e0cc59 | 815 | Double_t AliGenMUONlib::PtCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 816 | { |
d90f80fd | 817 | // Charm pT |
bd0276a8 | 818 | const Double_t kpt0 = 2.25; |
819 | const Double_t kxn = 3.17; | |
fe4da5cc | 820 | Double_t x=*px; |
821 | // | |
bd0276a8 | 822 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
823 | return x/TMath::Power(pass1,kxn); | |
824 | } | |
825 | ||
75e0cc59 | 826 | Double_t AliGenMUONlib::PtCharmCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 827 | { |
828 | // Charm pT | |
829 | const Double_t kpt0 = 2.12; | |
830 | const Double_t kxn = 2.78; | |
bd0276a8 | 831 | Double_t x=*px; |
832 | // | |
833 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
d90f80fd | 834 | return x/TMath::Power(pass1,kxn); |
fe4da5cc | 835 | } |
75e0cc59 | 836 | Double_t AliGenMUONlib::PtCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 837 | { |
838 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
839 | // PtCharmFiMjSkPP = PtCharmF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
840 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
841 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
842 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
843 | // calculations for the following inputs: | |
844 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
845 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
846 | // for j=0,1 & 2 respectively; | |
847 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
848 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
849 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
850 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
851 | // June 2008, Smbat.Grigoryan@cern.ch | |
852 | ||
853 | // Charm pT | |
854 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
855 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
856 | // Corresponding NLO total cross section is 5.68 mb | |
857 | ||
858 | ||
859 | const Double_t kpt0 = 2.2930; | |
860 | const Double_t kxn = 3.1196; | |
861 | Double_t c[3]={-5.2180e-01,1.8753e-01,2.8669e-02}; | |
862 | Double_t x=*px; | |
863 | // | |
864 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
865 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
866 | } | |
75e0cc59 | 867 | Double_t AliGenMUONlib::PtCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 868 | { |
869 | // Charm pT | |
870 | // Corresponding NLO total cross section is 6.06 mb | |
871 | const Double_t kpt0 = 2.8669; | |
872 | const Double_t kxn = 3.1044; | |
873 | Double_t c[3]={-4.6714e-01,1.5005e-01,4.5003e-02}; | |
874 | Double_t x=*px; | |
875 | // | |
876 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
877 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
878 | } | |
75e0cc59 | 879 | Double_t AliGenMUONlib::PtCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 880 | { |
881 | // Charm pT | |
882 | // Corresponding NLO total cross section is 6.06 mb | |
883 | const Double_t kpt0 = 1.8361; | |
884 | const Double_t kxn = 3.2966; | |
885 | Double_t c[3]={-6.1550e-01,2.6498e-01,1.0728e-02}; | |
886 | Double_t x=*px; | |
887 | // | |
888 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
889 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
890 | } | |
75e0cc59 | 891 | Double_t AliGenMUONlib::PtCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 892 | { |
893 | // Charm pT | |
894 | // Corresponding NLO total cross section is 7.69 mb | |
895 | const Double_t kpt0 = 2.1280; | |
896 | const Double_t kxn = 3.1397; | |
897 | Double_t c[3]={-5.4021e-01,2.0944e-01,2.5211e-02}; | |
898 | Double_t x=*px; | |
899 | // | |
900 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
901 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
902 | } | |
75e0cc59 | 903 | Double_t AliGenMUONlib::PtCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 904 | { |
905 | // Charm pT | |
906 | // Corresponding NLO total cross section is 4.81 mb | |
907 | const Double_t kpt0 = 2.4579; | |
908 | const Double_t kxn = 3.1095; | |
909 | Double_t c[3]={-5.1497e-01,1.7532e-01,3.2429e-02}; | |
910 | Double_t x=*px; | |
911 | // | |
912 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
913 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
914 | } | |
75e0cc59 | 915 | Double_t AliGenMUONlib::PtCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 916 | { |
917 | // Charm pT | |
918 | // Corresponding NLO total cross section is 14.09 mb | |
919 | const Double_t kpt0 = 2.1272; | |
920 | const Double_t kxn = 3.1904; | |
921 | Double_t c[3]={-4.6088e-01,2.1918e-01,2.3055e-02}; | |
922 | Double_t x=*px; | |
923 | // | |
924 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
925 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
926 | } | |
75e0cc59 | 927 | Double_t AliGenMUONlib::PtCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 928 | { |
929 | // Charm pT | |
930 | // Corresponding NLO total cross section is 1.52 mb | |
931 | const Double_t kpt0 = 2.8159; | |
932 | const Double_t kxn = 3.0857; | |
933 | Double_t c[3]={-6.4691e-01,2.0289e-01,2.4922e-02}; | |
934 | Double_t x=*px; | |
935 | // | |
936 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
937 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
938 | } | |
75e0cc59 | 939 | Double_t AliGenMUONlib::PtCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 940 | { |
941 | // Charm pT | |
942 | // Corresponding NLO total cross section is 3.67 mb | |
943 | const Double_t kpt0 = 2.7297; | |
944 | const Double_t kxn = 3.3019; | |
945 | Double_t c[3]={-6.2216e-01,1.9031e-01,1.5341e-02}; | |
946 | Double_t x=*px; | |
947 | // | |
948 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
949 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
950 | } | |
75e0cc59 | 951 | Double_t AliGenMUONlib::PtCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 952 | { |
953 | // Charm pT | |
954 | // Corresponding NLO total cross section is 3.38 mb | |
955 | const Double_t kpt0 = 2.3894; | |
956 | const Double_t kxn = 3.1075; | |
957 | Double_t c[3]={-4.9742e-01,1.7032e-01,2.5994e-02}; | |
958 | Double_t x=*px; | |
959 | // | |
960 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
961 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
962 | } | |
75e0cc59 | 963 | Double_t AliGenMUONlib::PtCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 964 | { |
965 | // Charm pT | |
966 | // Corresponding NLO total cross section is 10.37 mb | |
967 | const Double_t kpt0 = 2.0187; | |
968 | const Double_t kxn = 3.3011; | |
969 | Double_t c[3]={-3.9869e-01,2.9248e-01,1.1763e-02}; | |
970 | Double_t x=*px; | |
971 | // | |
972 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
973 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
974 | } | |
75e0cc59 | 975 | Double_t AliGenMUONlib::PtCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 976 | { |
977 | // Charm pT | |
978 | // Corresponding NLO total cross section is 7.22 mb | |
979 | const Double_t kpt0 = 2.1089; | |
980 | const Double_t kxn = 3.1848; | |
981 | Double_t c[3]={-4.6275e-01,1.8114e-01,2.1363e-02}; | |
982 | Double_t x=*px; | |
983 | // | |
984 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
985 | return x/TMath::Power(pass1,kxn)*(1.+c[0]*x+c[1]*x*x)/(1.+c[2]*x*x); | |
986 | } | |
987 | ||
fe4da5cc | 988 | // y-distribution |
75e0cc59 | 989 | Double_t AliGenMUONlib::YCharm( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 990 | { |
ec772ba2 | 991 | // Charm y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
992 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
993 | // shadowing + kt broadening | |
994 | ||
995 | Double_t x=px[0]; | |
996 | Double_t c[2]={-2.42985e-03,-2.31001e-04}; | |
997 | Double_t y=1+(c[0]*TMath::Power(x,2))+(c[1]*TMath::Power(x,4)); | |
998 | Double_t ycharm; | |
999 | ||
1000 | if (TMath::Abs(x)>8) { | |
1001 | ycharm=0.; | |
1002 | } | |
1003 | else { | |
1004 | ycharm=TMath::Power(y,3); | |
1005 | } | |
1006 | ||
1007 | return ycharm; | |
fe4da5cc | 1008 | } |
75e0cc59 | 1009 | Double_t AliGenMUONlib::YCharmF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1010 | { |
1011 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1012 | // YCharmFiMjSkPP = YCharmF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
1013 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1014 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1015 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1016 | // calculations for the following inputs: | |
1017 | // Peterson fragmentation function (F) with \epsilon_c = 0.02, 0.002 & 0.11 | |
1018 | // for i=0,1 & 2 respectively; quark mass (M) of 1.5, 1.3 & 1.7 GeV | |
1019 | // for j=0,1 & 2 respectively; | |
1020 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1021 | // with a/b = 1/1,1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1022 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1023 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1024 | // June 2008, Smbat.Grigoryan@cern.ch | |
1025 | ||
1026 | // Charm y | |
1027 | // Pythia6.214 (kCharmppMNRwmi, PDF = CTEQ5L, quark mass = 1.2 GeV, PtHard > 2.76 GeV/c) | |
1028 | // for pp collisions at 14 TeV with one c-cbar pair per event. | |
1029 | // Corresponding NLO total cross section is 5.68 mb | |
1030 | ||
1031 | Double_t x=px[0]; | |
1032 | Double_t c[2]={7.0909e-03,6.1967e-05}; | |
1033 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1034 | Double_t ycharm; | |
1035 | ||
1036 | if (TMath::Abs(x)>9) { | |
1037 | ycharm=0.; | |
1038 | } | |
1039 | else { | |
1040 | ycharm=TMath::Power(y,3); | |
1041 | } | |
1042 | ||
1043 | return ycharm; | |
1044 | } | |
75e0cc59 | 1045 | Double_t AliGenMUONlib::YCharmF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1046 | { |
1047 | // Charm y | |
1048 | // Corresponding NLO total cross section is 6.06 mb | |
1049 | Double_t x=px[0]; | |
1050 | Double_t c[2]={6.9707e-03,6.0971e-05}; | |
1051 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1052 | Double_t ycharm; | |
1053 | ||
1054 | if (TMath::Abs(x)>9) { | |
1055 | ycharm=0.; | |
1056 | } | |
1057 | else { | |
1058 | ycharm=TMath::Power(y,3); | |
1059 | } | |
1060 | ||
1061 | return ycharm; | |
1062 | } | |
75e0cc59 | 1063 | Double_t AliGenMUONlib::YCharmF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1064 | { |
1065 | // Charm y | |
1066 | // Corresponding NLO total cross section is 6.06 mb | |
1067 | Double_t x=px[0]; | |
1068 | Double_t c[2]={7.1687e-03,6.5303e-05}; | |
1069 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1070 | Double_t ycharm; | |
1071 | ||
1072 | if (TMath::Abs(x)>9) { | |
1073 | ycharm=0.; | |
1074 | } | |
1075 | else { | |
1076 | ycharm=TMath::Power(y,3); | |
1077 | } | |
1078 | ||
1079 | return ycharm; | |
1080 | } | |
75e0cc59 | 1081 | Double_t AliGenMUONlib::YCharmF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1082 | { |
1083 | // Charm y | |
1084 | // Corresponding NLO total cross section is 7.69 mb | |
1085 | Double_t x=px[0]; | |
1086 | Double_t c[2]={5.9090e-03,7.1854e-05}; | |
1087 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1088 | Double_t ycharm; | |
1089 | ||
1090 | if (TMath::Abs(x)>9) { | |
1091 | ycharm=0.; | |
1092 | } | |
1093 | else { | |
1094 | ycharm=TMath::Power(y,3); | |
1095 | } | |
1096 | ||
1097 | return ycharm; | |
1098 | } | |
75e0cc59 | 1099 | Double_t AliGenMUONlib::YCharmF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1100 | { |
1101 | // Charm y | |
1102 | // Corresponding NLO total cross section is 4.81 mb | |
1103 | Double_t x=px[0]; | |
1104 | Double_t c[2]={8.0882e-03,5.5872e-05}; | |
1105 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1106 | Double_t ycharm; | |
1107 | ||
1108 | if (TMath::Abs(x)>9) { | |
1109 | ycharm=0.; | |
1110 | } | |
1111 | else { | |
1112 | ycharm=TMath::Power(y,3); | |
1113 | } | |
1114 | ||
1115 | return ycharm; | |
1116 | } | |
75e0cc59 | 1117 | Double_t AliGenMUONlib::YCharmF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1118 | { |
1119 | // Charm y | |
1120 | // Corresponding NLO total cross section is 14.09 mb | |
1121 | Double_t x=px[0]; | |
1122 | Double_t c[2]={7.2520e-03,6.2691e-05}; | |
1123 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1124 | Double_t ycharm; | |
1125 | ||
1126 | if (TMath::Abs(x)>9) { | |
1127 | ycharm=0.; | |
1128 | } | |
1129 | else { | |
1130 | ycharm=TMath::Power(y,3); | |
1131 | } | |
1132 | ||
1133 | return ycharm; | |
1134 | } | |
75e0cc59 | 1135 | Double_t AliGenMUONlib::YCharmF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1136 | { |
1137 | // Charm y | |
1138 | // Corresponding NLO total cross section is 1.52 mb | |
1139 | Double_t x=px[0]; | |
1140 | Double_t c[2]={1.1040e-04,1.4498e-04}; | |
1141 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1142 | Double_t ycharm; | |
1143 | ||
1144 | if (TMath::Abs(x)>9) { | |
1145 | ycharm=0.; | |
1146 | } | |
1147 | else { | |
1148 | ycharm=TMath::Power(y,3); | |
1149 | } | |
1150 | ||
1151 | return ycharm; | |
1152 | } | |
75e0cc59 | 1153 | Double_t AliGenMUONlib::YCharmF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1154 | { |
1155 | // Charm y | |
1156 | // Corresponding NLO total cross section is 3.67 mb | |
1157 | Double_t x=px[0]; | |
1158 | Double_t c[2]={-3.1328e-03,1.8270e-04}; | |
1159 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1160 | Double_t ycharm; | |
1161 | ||
1162 | if (TMath::Abs(x)>9) { | |
1163 | ycharm=0.; | |
1164 | } | |
1165 | else { | |
1166 | ycharm=TMath::Power(y,3); | |
1167 | } | |
1168 | ||
1169 | return ycharm; | |
1170 | } | |
75e0cc59 | 1171 | Double_t AliGenMUONlib::YCharmF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1172 | { |
1173 | // Charm y | |
1174 | // Corresponding NLO total cross section is 3.38 mb | |
1175 | Double_t x=px[0]; | |
1176 | Double_t c[2]={7.0865e-03,6.2532e-05}; | |
1177 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1178 | Double_t ycharm; | |
1179 | ||
1180 | if (TMath::Abs(x)>9) { | |
1181 | ycharm=0.; | |
1182 | } | |
1183 | else { | |
1184 | ycharm=TMath::Power(y,3); | |
1185 | } | |
1186 | ||
1187 | return ycharm; | |
1188 | } | |
75e0cc59 | 1189 | Double_t AliGenMUONlib::YCharmF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1190 | { |
1191 | // Charm y | |
1192 | // Corresponding NLO total cross section is 10.37 mb | |
1193 | Double_t x=px[0]; | |
1194 | Double_t c[2]={7.7070e-03,5.3533e-05}; | |
1195 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1196 | Double_t ycharm; | |
1197 | ||
1198 | if (TMath::Abs(x)>9) { | |
1199 | ycharm=0.; | |
1200 | } | |
1201 | else { | |
1202 | ycharm=TMath::Power(y,3); | |
1203 | } | |
1204 | ||
1205 | return ycharm; | |
1206 | } | |
75e0cc59 | 1207 | Double_t AliGenMUONlib::YCharmF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1208 | { |
1209 | // Charm y | |
1210 | // Corresponding NLO total cross section is 7.22 mb | |
1211 | Double_t x=px[0]; | |
1212 | Double_t c[2]={7.9195e-03,5.3823e-05}; | |
1213 | Double_t y=1-(c[0]*TMath::Power(x,2))-(c[1]*TMath::Power(x,4)); | |
1214 | Double_t ycharm; | |
1215 | ||
1216 | if (TMath::Abs(x)>9) { | |
1217 | ycharm=0.; | |
1218 | } | |
1219 | else { | |
1220 | ycharm=TMath::Power(y,3); | |
1221 | } | |
1222 | ||
1223 | return ycharm; | |
1224 | } | |
fe4da5cc | 1225 | |
ec772ba2 | 1226 | |
65fb704d | 1227 | Int_t AliGenMUONlib::IpCharm(TRandom *ran) |
fe4da5cc | 1228 | { |
d90f80fd | 1229 | // Charm composition |
65fb704d | 1230 | Float_t random; |
fe4da5cc | 1231 | Int_t ip; |
1232 | // 411,421,431,4122 | |
65fb704d | 1233 | random = ran->Rndm(); |
ec772ba2 | 1234 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 |
1235 | // >>>>> cf. tab 4 p 11 | |
1236 | ||
1237 | if (random < 0.30) { | |
1238 | ip=421; | |
1239 | } else if (random < 0.60) { | |
1240 | ip=-421; | |
1241 | } else if (random < 0.70) { | |
1242 | ip=411; | |
1243 | } else if (random < 0.80) { | |
1244 | ip=-411; | |
1245 | } else if (random < 0.86) { | |
1246 | ip=431; | |
1247 | } else if (random < 0.92) { | |
1248 | ip=-431; | |
1249 | } else if (random < 0.96) { | |
1250 | ip=4122; | |
fe4da5cc | 1251 | } else { |
ec772ba2 | 1252 | ip=-4122; |
fe4da5cc | 1253 | } |
fe4da5cc | 1254 | |
1255 | return ip; | |
1256 | } | |
1257 | ||
fe4da5cc | 1258 | // |
1259 | // Beauty | |
1260 | // | |
1261 | // | |
1262 | // pt-distribution | |
1263 | //____________________________________________________________ | |
75e0cc59 | 1264 | Double_t AliGenMUONlib::PtBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1265 | { |
d90f80fd | 1266 | // Beauty pT |
bd0276a8 | 1267 | const Double_t kpt0 = 6.53; |
1268 | const Double_t kxn = 3.59; | |
1269 | Double_t x=*px; | |
1270 | // | |
1271 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1272 | return x/TMath::Power(pass1,kxn); | |
1273 | } | |
1274 | ||
75e0cc59 | 1275 | Double_t AliGenMUONlib::PtBeautyCentral( const Double_t *px, const Double_t */*dummy*/) |
bd0276a8 | 1276 | { |
1277 | // Beauty pT | |
1278 | const Double_t kpt0 = 6.14; | |
1279 | const Double_t kxn = 2.93; | |
fe4da5cc | 1280 | Double_t x=*px; |
1281 | // | |
d90f80fd | 1282 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); |
1283 | return x/TMath::Power(pass1,kxn); | |
fe4da5cc | 1284 | } |
75e0cc59 | 1285 | Double_t AliGenMUONlib::PtBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1286 | { |
1287 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1288 | // PtBeautyFiMjSkPP = PtBeautyF0M0S0PP * (dN(i,j,k)/dpt / dN(0,0,0)/dpt)_MNR | |
1289 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1290 | // dN(i,j,k)/dpt - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1291 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1292 | // calculations for the following inputs: | |
1293 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
1294 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
1295 | // for j=0,1 & 2 respectively; | |
1296 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1297 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 for | |
1298 | // k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1299 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1300 | // June 2008, Smbat.Grigoryan@cern.ch | |
1301 | ||
1302 | // Beauty pT | |
1303 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
1304 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
1305 | // Corresponding NLO total cross section is 0.494 mb | |
1306 | ||
1307 | const Double_t kpt0 = 8.0575; | |
1308 | const Double_t kxn = 3.1921; | |
1309 | Double_t x=*px; | |
1310 | // | |
1311 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1312 | return x/TMath::Power(pass1,kxn); | |
1313 | } | |
75e0cc59 | 1314 | Double_t AliGenMUONlib::PtBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1315 | { |
1316 | // Beauty pT | |
1317 | // Corresponding NLO total cross section is 0.445 mb | |
1318 | const Double_t kpt0 = 8.6239; | |
1319 | const Double_t kxn = 3.2911; | |
1320 | Double_t x=*px; | |
1321 | // | |
1322 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1323 | return x/TMath::Power(pass1,kxn); | |
1324 | } | |
75e0cc59 | 1325 | Double_t AliGenMUONlib::PtBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1326 | { |
1327 | // Beauty pT | |
1328 | // Corresponding NLO total cross section is 0.445 mb | |
1329 | const Double_t kpt0 = 7.3367; | |
1330 | const Double_t kxn = 3.0692; | |
1331 | Double_t x=*px; | |
1332 | // | |
1333 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1334 | return x/TMath::Power(pass1,kxn); | |
1335 | } | |
75e0cc59 | 1336 | Double_t AliGenMUONlib::PtBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1337 | { |
1338 | // Beauty pT | |
1339 | // Corresponding NLO total cross section is 0.518 mb | |
1340 | const Double_t kpt0 = 7.6409; | |
1341 | const Double_t kxn = 3.1364; | |
1342 | Double_t x=*px; | |
1343 | // | |
1344 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1345 | return x/TMath::Power(pass1,kxn); | |
1346 | } | |
75e0cc59 | 1347 | Double_t AliGenMUONlib::PtBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1348 | { |
1349 | // Beauty pT | |
1350 | // Corresponding NLO total cross section is 0.384 mb | |
1351 | const Double_t kpt0 = 8.4948; | |
1352 | const Double_t kxn = 3.2546; | |
1353 | Double_t x=*px; | |
1354 | // | |
1355 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1356 | return x/TMath::Power(pass1,kxn); | |
1357 | } | |
75e0cc59 | 1358 | Double_t AliGenMUONlib::PtBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1359 | { |
1360 | // Beauty pT | |
1361 | // Corresponding NLO total cross section is 0.648 mb | |
1362 | const Double_t kpt0 = 7.6631; | |
1363 | const Double_t kxn = 3.1621; | |
1364 | Double_t x=*px; | |
1365 | // | |
1366 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1367 | return x/TMath::Power(pass1,kxn); | |
1368 | } | |
75e0cc59 | 1369 | Double_t AliGenMUONlib::PtBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1370 | { |
1371 | // Beauty pT | |
1372 | // Corresponding NLO total cross section is 0.294 mb | |
1373 | const Double_t kpt0 = 8.7245; | |
1374 | const Double_t kxn = 3.2213; | |
1375 | Double_t x=*px; | |
1376 | // | |
1377 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1378 | return x/TMath::Power(pass1,kxn); | |
1379 | } | |
75e0cc59 | 1380 | Double_t AliGenMUONlib::PtBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1381 | { |
1382 | // Beauty pT | |
1383 | // Corresponding NLO total cross section is 0.475 mb | |
1384 | const Double_t kpt0 = 8.5296; | |
1385 | const Double_t kxn = 3.2187; | |
1386 | Double_t x=*px; | |
1387 | // | |
1388 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1389 | return x/TMath::Power(pass1,kxn); | |
1390 | } | |
75e0cc59 | 1391 | Double_t AliGenMUONlib::PtBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1392 | { |
1393 | // Beauty pT | |
1394 | // Corresponding NLO total cross section is 0.324 mb | |
1395 | const Double_t kpt0 = 7.9440; | |
1396 | const Double_t kxn = 3.1614; | |
1397 | Double_t x=*px; | |
1398 | // | |
1399 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1400 | return x/TMath::Power(pass1,kxn); | |
1401 | } | |
75e0cc59 | 1402 | Double_t AliGenMUONlib::PtBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1403 | { |
1404 | // Beauty pT | |
1405 | // Corresponding NLO total cross section is 0.536 mb | |
1406 | const Double_t kpt0 = 8.2408; | |
1407 | const Double_t kxn = 3.3029; | |
1408 | Double_t x=*px; | |
1409 | // | |
1410 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1411 | return x/TMath::Power(pass1,kxn); | |
1412 | } | |
75e0cc59 | 1413 | Double_t AliGenMUONlib::PtBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1414 | { |
1415 | // Beauty pT | |
1416 | // Corresponding NLO total cross section is 0.420 mb | |
1417 | const Double_t kpt0 = 7.8041; | |
1418 | const Double_t kxn = 3.2094; | |
1419 | Double_t x=*px; | |
1420 | // | |
1421 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1422 | return x/TMath::Power(pass1,kxn); | |
1423 | } | |
1424 | ||
fe4da5cc | 1425 | // y-distribution |
75e0cc59 | 1426 | Double_t AliGenMUONlib::YBeauty( const Double_t *px, const Double_t */*dummy*/) |
fe4da5cc | 1427 | { |
ec772ba2 | 1428 | // Beauty y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225) |
1429 | // Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD) | |
1430 | // shadowing + kt broadening | |
1431 | ||
1432 | Double_t x=px[0]; | |
1433 | Double_t c[2]={-1.27590e-02,-2.42731e-04}; | |
1434 | Double_t y=1+c[0]*TMath::Power(x,2)+c[1]*TMath::Power(x,4); | |
1435 | Double_t ybeauty; | |
1436 | ||
1437 | if (TMath::Abs(x)>6) { | |
1438 | ybeauty=0.; | |
1439 | } | |
1440 | else { | |
1441 | ybeauty=TMath::Power(y,3); | |
1442 | } | |
1443 | ||
1444 | return ybeauty; | |
fe4da5cc | 1445 | } |
75e0cc59 | 1446 | Double_t AliGenMUONlib::YBeautyF0M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1447 | { |
1448 | // FiMjSkPP define theoretical uncertainties around F0M0S0PP as follows: | |
1449 | // YBeautyFiMjSkPP = YBeautyF0M0S0PP * (dN(i,j,k)/dy / dN(0,0,0)/dy)_MNR | |
1450 | // i=0,1,2; j=0,1,2; k=0,1,...,6 | |
1451 | // dN(i,j,k)/dy - spectra obtained by A.Dainese (hep-ph/0601164, p.88; | |
1452 | // http://www-zeus.desy.de/~corradi/benchmarks) from NLO pQCD (MNR) | |
1453 | // calculations for the following inputs: | |
1454 | // Peterson fragmentation function (F) with \epsilon_b = 0.001, 0.0002 & 0.004 | |
1455 | // for i=0,1 & 2 respectively; quark mass (M) of 4.75, 4.5 & 5.0 GeV | |
1456 | // for j=0,1 & 2 respectively; | |
1457 | // factorisation \mu_F = a*mt and renormalisation \mu_R = b*mt scales (S) | |
1458 | // with a/b = 1/1, 1/0.5, 0.5/1, 0.5/0.5, 1/2, 2/1 & 2/2 | |
1459 | // for k = 0, 1, 2, 3, 4, 5 & 6 respectively; CTEQ6.1 PDF set | |
1460 | // (PDF uncertainty not considered since is small, see hep-ph/0601164, p.89). | |
1461 | // June 2008, Smbat.Grigoryan@cern.ch | |
1462 | ||
1463 | // Beauty y | |
1464 | // Pythia6.214 (kBeautyppMNRwmi, PDF = CTEQ5L, quark mass = 4.75 GeV, PtHard > 2.76 GeV/c) | |
1465 | // for pp collisions at 14 TeV with one b-bbar pair per event. | |
1466 | // Corresponding NLO total cross section is 0.494 mb | |
1467 | ||
fe4da5cc | 1468 | |
9e9ae065 | 1469 | Double_t x=px[0]; |
1470 | Double_t c[2]={1.2350e-02,9.2667e-05}; | |
1471 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1472 | Double_t ybeauty; | |
1473 | ||
1474 | if (TMath::Abs(x)>7.6) { | |
1475 | ybeauty=0.; | |
1476 | } | |
1477 | else { | |
1478 | ybeauty=TMath::Power(y,3); | |
1479 | } | |
1480 | ||
1481 | return ybeauty; | |
1482 | } | |
75e0cc59 | 1483 | Double_t AliGenMUONlib::YBeautyF1M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1484 | { |
1485 | // Beauty y | |
1486 | // Corresponding NLO total cross section is 0.445 mb | |
1487 | Double_t x=px[0]; | |
1488 | Double_t c[2]={1.2292e-02,9.1847e-05}; | |
1489 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1490 | Double_t ybeauty; | |
1491 | ||
1492 | if (TMath::Abs(x)>7.6) { | |
1493 | ybeauty=0.; | |
1494 | } | |
1495 | else { | |
1496 | ybeauty=TMath::Power(y,3); | |
1497 | } | |
1498 | ||
1499 | return ybeauty; | |
1500 | } | |
75e0cc59 | 1501 | Double_t AliGenMUONlib::YBeautyF2M0S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1502 | { |
1503 | // Beauty y | |
1504 | // Corresponding NLO total cross section is 0.445 mb | |
1505 | Double_t x=px[0]; | |
1506 | Double_t c[2]={1.2436e-02,9.3709e-05}; | |
1507 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1508 | Double_t ybeauty; | |
1509 | ||
1510 | if (TMath::Abs(x)>7.6) { | |
1511 | ybeauty=0.; | |
1512 | } | |
1513 | else { | |
1514 | ybeauty=TMath::Power(y,3); | |
1515 | } | |
1516 | ||
1517 | return ybeauty; | |
1518 | } | |
75e0cc59 | 1519 | Double_t AliGenMUONlib::YBeautyF0M1S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1520 | { |
1521 | // Beauty y | |
1522 | // Corresponding NLO total cross section is 0.518 mb | |
1523 | Double_t x=px[0]; | |
1524 | Double_t c[2]={1.1714e-02,1.0068e-04}; | |
1525 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1526 | Double_t ybeauty; | |
1527 | ||
1528 | if (TMath::Abs(x)>7.6) { | |
1529 | ybeauty=0.; | |
1530 | } | |
1531 | else { | |
1532 | ybeauty=TMath::Power(y,3); | |
1533 | } | |
1534 | ||
1535 | return ybeauty; | |
1536 | } | |
75e0cc59 | 1537 | Double_t AliGenMUONlib::YBeautyF0M2S0PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1538 | { |
1539 | // Beauty y | |
1540 | // Corresponding NLO total cross section is 0.384 mb | |
1541 | Double_t x=px[0]; | |
1542 | Double_t c[2]={1.2944e-02,8.5500e-05}; | |
1543 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1544 | Double_t ybeauty; | |
1545 | ||
1546 | if (TMath::Abs(x)>7.6) { | |
1547 | ybeauty=0.; | |
1548 | } | |
1549 | else { | |
1550 | ybeauty=TMath::Power(y,3); | |
1551 | } | |
1552 | ||
1553 | return ybeauty; | |
1554 | } | |
75e0cc59 | 1555 | Double_t AliGenMUONlib::YBeautyF0M0S1PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1556 | { |
1557 | // Beauty y | |
1558 | // Corresponding NLO total cross section is 0.648 mb | |
1559 | Double_t x=px[0]; | |
1560 | Double_t c[2]={1.2455e-02,9.2713e-05}; | |
1561 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1562 | Double_t ybeauty; | |
1563 | ||
1564 | if (TMath::Abs(x)>7.6) { | |
1565 | ybeauty=0.; | |
1566 | } | |
1567 | else { | |
1568 | ybeauty=TMath::Power(y,3); | |
1569 | } | |
1570 | ||
1571 | return ybeauty; | |
1572 | } | |
75e0cc59 | 1573 | Double_t AliGenMUONlib::YBeautyF0M0S2PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1574 | { |
1575 | // Beauty y | |
1576 | // Corresponding NLO total cross section is 0.294 mb | |
1577 | Double_t x=px[0]; | |
1578 | Double_t c[2]={1.0897e-02,1.1878e-04}; | |
1579 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1580 | Double_t ybeauty; | |
1581 | ||
1582 | if (TMath::Abs(x)>7.6) { | |
1583 | ybeauty=0.; | |
1584 | } | |
1585 | else { | |
1586 | ybeauty=TMath::Power(y,3); | |
1587 | } | |
1588 | ||
1589 | return ybeauty; | |
1590 | } | |
75e0cc59 | 1591 | Double_t AliGenMUONlib::YBeautyF0M0S3PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1592 | { |
1593 | // Beauty y | |
1594 | // Corresponding NLO total cross section is 0.475 mb | |
1595 | Double_t x=px[0]; | |
1596 | Double_t c[2]={1.0912e-02,1.1858e-04}; | |
1597 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1598 | Double_t ybeauty; | |
1599 | ||
1600 | if (TMath::Abs(x)>7.6) { | |
1601 | ybeauty=0.; | |
1602 | } | |
1603 | else { | |
1604 | ybeauty=TMath::Power(y,3); | |
1605 | } | |
1606 | ||
1607 | return ybeauty; | |
1608 | } | |
75e0cc59 | 1609 | Double_t AliGenMUONlib::YBeautyF0M0S4PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1610 | { |
1611 | // Beauty y | |
1612 | // Corresponding NLO total cross section is 0.324 mb | |
1613 | Double_t x=px[0]; | |
1614 | Double_t c[2]={1.2378e-02,9.2490e-05}; | |
1615 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1616 | Double_t ybeauty; | |
1617 | ||
1618 | if (TMath::Abs(x)>7.6) { | |
1619 | ybeauty=0.; | |
1620 | } | |
1621 | else { | |
1622 | ybeauty=TMath::Power(y,3); | |
1623 | } | |
1624 | ||
1625 | return ybeauty; | |
1626 | } | |
75e0cc59 | 1627 | Double_t AliGenMUONlib::YBeautyF0M0S5PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1628 | { |
1629 | // Beauty y | |
1630 | // Corresponding NLO total cross section is 0.536 mb | |
1631 | Double_t x=px[0]; | |
1632 | Double_t c[2]={1.2886e-02,8.2912e-05}; | |
1633 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1634 | Double_t ybeauty; | |
1635 | ||
1636 | if (TMath::Abs(x)>7.6) { | |
1637 | ybeauty=0.; | |
1638 | } | |
1639 | else { | |
1640 | ybeauty=TMath::Power(y,3); | |
1641 | } | |
1642 | ||
1643 | return ybeauty; | |
1644 | } | |
75e0cc59 | 1645 | Double_t AliGenMUONlib::YBeautyF0M0S6PP( const Double_t *px, const Double_t */*dummy*/) |
9e9ae065 | 1646 | { |
1647 | // Beauty y | |
1648 | // Corresponding NLO total cross section is 0.420 mb | |
1649 | Double_t x=px[0]; | |
1650 | Double_t c[2]={1.3106e-02,8.0115e-05}; | |
1651 | Double_t y=1-c[0]*TMath::Power(x,2)-c[1]*TMath::Power(x,4); | |
1652 | Double_t ybeauty; | |
1653 | ||
1654 | if (TMath::Abs(x)>7.6) { | |
1655 | ybeauty=0.; | |
1656 | } | |
1657 | else { | |
1658 | ybeauty=TMath::Power(y,3); | |
1659 | } | |
1660 | ||
1661 | return ybeauty; | |
1662 | } | |
ec772ba2 | 1663 | |
65fb704d | 1664 | Int_t AliGenMUONlib::IpBeauty(TRandom *ran) |
fe4da5cc | 1665 | { |
d90f80fd | 1666 | // Beauty Composition |
65fb704d | 1667 | Float_t random; |
fe4da5cc | 1668 | Int_t ip; |
ec772ba2 | 1669 | random = ran->Rndm(); |
1670 | ||
1671 | // Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3 | |
1672 | // >>>>> cf. tab 4 p 11 | |
1673 | ||
1674 | if (random < 0.20) { | |
1675 | ip=511; | |
1676 | } else if (random < 0.40) { | |
1677 | ip=-511; | |
1678 | } else if (random < 0.605) { | |
1679 | ip=521; | |
1680 | } else if (random < 0.81) { | |
1681 | ip=-521; | |
1682 | } else if (random < 0.87) { | |
1683 | ip=531; | |
1684 | } else if (random < 0.93) { | |
1685 | ip=-531; | |
1686 | } else if (random < 0.965) { | |
1687 | ip=5122; | |
fe4da5cc | 1688 | } else { |
ec772ba2 | 1689 | ip=-5122; |
fe4da5cc | 1690 | } |
fe4da5cc | 1691 | |
ec772ba2 | 1692 | return ip; |
fe4da5cc | 1693 | } |
1694 | ||
ec772ba2 | 1695 | |
75e0cc59 | 1696 | typedef Double_t (*GenFunc) (const Double_t*, const Double_t*); |
53904666 | 1697 | GenFunc AliGenMUONlib::GetPt(Int_t param, const char* tname) const |
fe4da5cc | 1698 | { |
d90f80fd | 1699 | // Return pointer to pT parameterisation |
05932df6 | 1700 | TString sname = TString(tname); |
fe4da5cc | 1701 | GenFunc func; |
753690b0 | 1702 | switch (param) |
fe4da5cc | 1703 | { |
34f60c01 | 1704 | case kPhi: |
fe4da5cc | 1705 | func=PtPhi; |
1706 | break; | |
89512a3b | 1707 | case kOmega: |
1708 | func=PtOmega; | |
1709 | break; | |
1710 | case kEta: | |
1711 | func=PtEta; | |
1712 | break; | |
0ad09590 | 1713 | case kJpsiFamily: |
88e5db43 | 1714 | case kPsiP: |
34f60c01 | 1715 | case kJpsi: |
bb6e81ac | 1716 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 1717 | func=PtJpsiPbPb; |
bb6e81ac | 1718 | } else if (sname == "Vogt pp") { |
1719 | func=PtJpsiPP; | |
0e137c25 | 1720 | } else if (sname == "CDF scaled") { |
1721 | func=PtJpsiCDFscaled; | |
9ff13849 | 1722 | } else if (sname == "CDF pp") { |
1723 | func=PtJpsiCDFscaledPP; | |
9e9ae065 | 1724 | } else if (sname == "CDF pp 10") { |
1725 | func=PtJpsiCDFscaledPP10; | |
1726 | } else if (sname == "CDF scaled old") { | |
1727 | func=PtJpsiCDFscaledold; | |
1728 | } else if (sname == "CDF pp old") { | |
1729 | func=PtJpsiCDFscaledPPold; | |
4ca8d070 | 1730 | } else if (sname == "Flat") { |
1731 | func=PtJpsiFlat; | |
05932df6 | 1732 | } else { |
1733 | func=PtJpsi; | |
1734 | } | |
fe4da5cc | 1735 | break; |
17d28ba5 | 1736 | case kJpsiFromB: |
1737 | func = PtJpsiBPbPb; | |
1738 | break; | |
0ad09590 | 1739 | case kUpsilonFamily: |
88e5db43 | 1740 | case kUpsilonP: |
1741 | case kUpsilonPP: | |
34f60c01 | 1742 | case kUpsilon: |
bb6e81ac | 1743 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 1744 | func=PtUpsilonPbPb; |
bb6e81ac | 1745 | } else if (sname == "Vogt pp") { |
1746 | func=PtUpsilonPP; | |
0e137c25 | 1747 | } else if (sname == "CDF scaled") { |
1748 | func=PtUpsilonCDFscaled; | |
9ff13849 | 1749 | } else if (sname == "CDF pp") { |
1750 | func=PtUpsilonCDFscaledPP; | |
4ca8d070 | 1751 | } else if (sname == "Flat") { |
1752 | func=PtUpsilonFlat; | |
05932df6 | 1753 | } else { |
1754 | func=PtUpsilon; | |
1755 | } | |
0ad09590 | 1756 | break; |
34f60c01 | 1757 | case kCharm: |
9e9ae065 | 1758 | if (sname == "F0M0S0 pp") { |
1759 | func=PtCharmF0M0S0PP; | |
1760 | } else if (sname == "F1M0S0 pp") { | |
1761 | func=PtCharmF1M0S0PP; | |
1762 | } else if (sname == "F2M0S0 pp") { | |
1763 | func=PtCharmF2M0S0PP; | |
1764 | } else if (sname == "F0M1S0 pp") { | |
1765 | func=PtCharmF0M1S0PP; | |
1766 | } else if (sname == "F0M2S0 pp") { | |
1767 | func=PtCharmF0M2S0PP; | |
1768 | } else if (sname == "F0M0S1 pp") { | |
1769 | func=PtCharmF0M0S1PP; | |
1770 | } else if (sname == "F0M0S2 pp") { | |
1771 | func=PtCharmF0M0S2PP; | |
1772 | } else if (sname == "F0M0S3 pp") { | |
1773 | func=PtCharmF0M0S3PP; | |
1774 | } else if (sname == "F0M0S4 pp") { | |
1775 | func=PtCharmF0M0S4PP; | |
1776 | } else if (sname == "F0M0S5 pp") { | |
1777 | func=PtCharmF0M0S5PP; | |
1778 | } else if (sname == "F0M0S6 pp") { | |
1779 | func=PtCharmF0M0S6PP; | |
1780 | } else if (sname == "central") { | |
bd0276a8 | 1781 | func=PtCharmCentral; |
1782 | } else { | |
1783 | func=PtCharm; | |
1784 | } | |
fe4da5cc | 1785 | break; |
34f60c01 | 1786 | case kBeauty: |
9e9ae065 | 1787 | if (sname == "F0M0S0 pp") { |
1788 | func=PtBeautyF0M0S0PP; | |
1789 | } else if (sname == "F1M0S0 pp") { | |
1790 | func=PtBeautyF1M0S0PP; | |
1791 | } else if (sname == "F2M0S0 pp") { | |
1792 | func=PtBeautyF2M0S0PP; | |
1793 | } else if (sname == "F0M1S0 pp") { | |
1794 | func=PtBeautyF0M1S0PP; | |
1795 | } else if (sname == "F0M2S0 pp") { | |
1796 | func=PtBeautyF0M2S0PP; | |
1797 | } else if (sname == "F0M0S1 pp") { | |
1798 | func=PtBeautyF0M0S1PP; | |
1799 | } else if (sname == "F0M0S2 pp") { | |
1800 | func=PtBeautyF0M0S2PP; | |
1801 | } else if (sname == "F0M0S3 pp") { | |
1802 | func=PtBeautyF0M0S3PP; | |
1803 | } else if (sname == "F0M0S4 pp") { | |
1804 | func=PtBeautyF0M0S4PP; | |
1805 | } else if (sname == "F0M0S5 pp") { | |
1806 | func=PtBeautyF0M0S5PP; | |
1807 | } else if (sname == "F0M0S6 pp") { | |
1808 | func=PtBeautyF0M0S6PP; | |
1809 | } else if (sname == "central") { | |
bd0276a8 | 1810 | func=PtBeautyCentral; |
1811 | } else { | |
1812 | func=PtBeauty; | |
1813 | } | |
fe4da5cc | 1814 | break; |
34f60c01 | 1815 | case kPion: |
753690b0 | 1816 | func=PtPion; |
1817 | break; | |
34f60c01 | 1818 | case kKaon: |
753690b0 | 1819 | func=PtKaon; |
1820 | break; | |
6b450aa0 | 1821 | case kChic0: |
1822 | func=PtChic0; | |
00935af2 | 1823 | break; |
6b450aa0 | 1824 | case kChic1: |
1825 | func=PtChic1; | |
00935af2 | 1826 | break; |
6b450aa0 | 1827 | case kChic2: |
1828 | func=PtChic2; | |
00935af2 | 1829 | break; |
6b450aa0 | 1830 | case kChic: |
1831 | func=PtChic; | |
00935af2 | 1832 | break; |
119b35c7 | 1833 | default: |
1834 | func=0; | |
1835 | printf("<AliGenMUONlib::GetPt> unknown parametrisation\n"); | |
fe4da5cc | 1836 | } |
1837 | return func; | |
1838 | } | |
1839 | ||
53904666 | 1840 | GenFunc AliGenMUONlib::GetY(Int_t param, const char* tname) const |
fe4da5cc | 1841 | { |
ac3faee4 | 1842 | // |
1843 | // Return pointer to y- parameterisation | |
1844 | // | |
05932df6 | 1845 | TString sname = TString(tname); |
fe4da5cc | 1846 | GenFunc func; |
753690b0 | 1847 | switch (param) |
fe4da5cc | 1848 | { |
34f60c01 | 1849 | case kPhi: |
fe4da5cc | 1850 | func=YPhi; |
1851 | break; | |
89512a3b | 1852 | case kEta: |
1853 | func=YEta; | |
1854 | break; | |
1855 | case kOmega: | |
1856 | func=YOmega; | |
1857 | break; | |
0ad09590 | 1858 | case kJpsiFamily: |
88e5db43 | 1859 | case kPsiP: |
34f60c01 | 1860 | case kJpsi: |
bb6e81ac | 1861 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 1862 | func=YJpsiPbPb; |
bb6e81ac | 1863 | } else if (sname == "Vogt pp"){ |
1864 | func=YJpsiPP; | |
0e137c25 | 1865 | } else if (sname == "CDF scaled") { |
1866 | func=YJpsiCDFscaled; | |
9ff13849 | 1867 | } else if (sname == "CDF pp") { |
1868 | func=YJpsiCDFscaledPP; | |
9e9ae065 | 1869 | } else if (sname == "CDF pp 10") { |
1870 | func=YJpsiCDFscaledPP10; | |
1871 | } else if (sname == "CDF scaled old") { | |
1872 | func=YJpsiCDFscaledold; | |
1873 | } else if (sname == "CDF pp old") { | |
1874 | func=YJpsiCDFscaledPPold; | |
4ca8d070 | 1875 | } else if (sname == "Flat") { |
1876 | func=YJpsiFlat; | |
05932df6 | 1877 | } else { |
1878 | func=YJpsi; | |
1879 | } | |
17d28ba5 | 1880 | break; |
1881 | case kJpsiFromB: | |
1882 | func = YJpsiBPbPb; | |
fe4da5cc | 1883 | break; |
0ad09590 | 1884 | case kUpsilonFamily: |
88e5db43 | 1885 | case kUpsilonP: |
1886 | case kUpsilonPP: | |
34f60c01 | 1887 | case kUpsilon: |
bb6e81ac | 1888 | if (sname == "Vogt" || sname == "Vogt PbPb") { |
05932df6 | 1889 | func=YUpsilonPbPb; |
bb6e81ac | 1890 | } else if (sname == "Vogt pp") { |
1891 | func = YUpsilonPP; | |
0e137c25 | 1892 | } else if (sname == "CDF scaled") { |
1893 | func=YUpsilonCDFscaled; | |
9ff13849 | 1894 | } else if (sname == "CDF pp") { |
1895 | func=YUpsilonCDFscaledPP; | |
4ca8d070 | 1896 | } else if (sname == "Flat") { |
1897 | func=YUpsilonFlat; | |
05932df6 | 1898 | } else { |
1899 | func=YUpsilon; | |
1900 | } | |
fe4da5cc | 1901 | break; |
34f60c01 | 1902 | case kCharm: |
9e9ae065 | 1903 | if (sname == "F0M0S0 pp") { |
1904 | func=YCharmF0M0S0PP; | |
1905 | } else if (sname == "F1M0S0 pp") { | |
1906 | func=YCharmF1M0S0PP; | |
1907 | } else if (sname == "F2M0S0 pp") { | |
1908 | func=YCharmF2M0S0PP; | |
1909 | } else if (sname == "F0M1S0 pp") { | |
1910 | func=YCharmF0M1S0PP; | |
1911 | } else if (sname == "F0M2S0 pp") { | |
1912 | func=YCharmF0M2S0PP; | |
1913 | } else if (sname == "F0M0S1 pp") { | |
1914 | func=YCharmF0M0S1PP; | |
1915 | } else if (sname == "F0M0S2 pp") { | |
1916 | func=YCharmF0M0S2PP; | |
1917 | } else if (sname == "F0M0S3 pp") { | |
1918 | func=YCharmF0M0S3PP; | |
1919 | } else if (sname == "F0M0S4 pp") { | |
1920 | func=YCharmF0M0S4PP; | |
1921 | } else if (sname == "F0M0S5 pp") { | |
1922 | func=YCharmF0M0S5PP; | |
1923 | } else if (sname == "F0M0S6 pp") { | |
1924 | func=YCharmF0M0S6PP; | |
1925 | } else { | |
1926 | func=YCharm; | |
1927 | } | |
fe4da5cc | 1928 | break; |
34f60c01 | 1929 | case kBeauty: |
9e9ae065 | 1930 | if (sname == "F0M0S0 pp") { |
1931 | func=YBeautyF0M0S0PP; | |
1932 | } else if (sname == "F1M0S0 pp") { | |
1933 | func=YBeautyF1M0S0PP; | |
1934 | } else if (sname == "F2M0S0 pp") { | |
1935 | func=YBeautyF2M0S0PP; | |
1936 | } else if (sname == "F0M1S0 pp") { | |
1937 | func=YBeautyF0M1S0PP; | |
1938 | } else if (sname == "F0M2S0 pp") { | |
1939 | func=YBeautyF0M2S0PP; | |
1940 | } else if (sname == "F0M0S1 pp") { | |
1941 | func=YBeautyF0M0S1PP; | |
1942 | } else if (sname == "F0M0S2 pp") { | |
1943 | func=YBeautyF0M0S2PP; | |
1944 | } else if (sname == "F0M0S3 pp") { | |
1945 | func=YBeautyF0M0S3PP; | |
1946 | } else if (sname == "F0M0S4 pp") { | |
1947 | func=YBeautyF0M0S4PP; | |
1948 | } else if (sname == "F0M0S5 pp") { | |
1949 | func=YBeautyF0M0S5PP; | |
1950 | } else if (sname == "F0M0S6 pp") { | |
1951 | func=YBeautyF0M0S6PP; | |
1952 | } else { | |
1953 | func=YBeauty; | |
1954 | } | |
fe4da5cc | 1955 | break; |
34f60c01 | 1956 | case kPion: |
753690b0 | 1957 | func=YPion; |
1958 | break; | |
34f60c01 | 1959 | case kKaon: |
753690b0 | 1960 | func=YKaon; |
1961 | break; | |
6b450aa0 | 1962 | case kChic0: |
1963 | func=YChic0; | |
00935af2 | 1964 | break; |
6b450aa0 | 1965 | case kChic1: |
1966 | func=YChic1; | |
00935af2 | 1967 | break; |
6b450aa0 | 1968 | case kChic2: |
1969 | func=YChic2; | |
00935af2 | 1970 | break; |
6b450aa0 | 1971 | case kChic: |
1972 | func=YChic; | |
00935af2 | 1973 | break; |
119b35c7 | 1974 | default: |
1975 | func=0; | |
1976 | printf("<AliGenMUONlib::GetY> unknown parametrisation\n"); | |
fe4da5cc | 1977 | } |
1978 | return func; | |
1979 | } | |
00935af2 | 1980 | |
1981 | // | |
1982 | // Chi | |
1983 | // | |
1984 | // | |
1985 | // pt-distribution | |
1986 | //____________________________________________________________ | |
75e0cc59 | 1987 | Double_t AliGenMUONlib::PtChic0( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 1988 | { |
1989 | // Chi_c1 pT | |
1990 | const Double_t kpt0 = 4.; | |
1991 | const Double_t kxn = 3.6; | |
1992 | Double_t x=*px; | |
1993 | // | |
1994 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
1995 | return x/TMath::Power(pass1,kxn); | |
1996 | } | |
75e0cc59 | 1997 | Double_t AliGenMUONlib::PtChic1( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 1998 | { |
1999 | // Chi_c1 pT | |
2000 | const Double_t kpt0 = 4.; | |
2001 | const Double_t kxn = 3.6; | |
2002 | Double_t x=*px; | |
2003 | // | |
2004 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2005 | return x/TMath::Power(pass1,kxn); | |
2006 | } | |
75e0cc59 | 2007 | Double_t AliGenMUONlib::PtChic2( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2008 | { |
2009 | // Chi_c2 pT | |
2010 | const Double_t kpt0 = 4.; | |
2011 | const Double_t kxn = 3.6; | |
2012 | Double_t x=*px; | |
2013 | // | |
2014 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2015 | return x/TMath::Power(pass1,kxn); | |
2016 | } | |
75e0cc59 | 2017 | Double_t AliGenMUONlib::PtChic( const Double_t *px, const Double_t */*dummy*/) |
00935af2 | 2018 | { |
2019 | // Chi_c family pT | |
2020 | const Double_t kpt0 = 4.; | |
2021 | const Double_t kxn = 3.6; | |
2022 | Double_t x=*px; | |
2023 | // | |
2024 | Double_t pass1 = 1.+(x/kpt0)*(x/kpt0); | |
2025 | return x/TMath::Power(pass1,kxn); | |
2026 | } | |
2027 | ||
2028 | // | |
2029 | // y-distribution | |
2030 | //____________________________________________________________ | |
75e0cc59 | 2031 | Double_t AliGenMUONlib::YChic0(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2032 | { |
2033 | // Chi-1c y | |
2034 | const Double_t ky0 = 4.; | |
2035 | const Double_t kb=1.; | |
2036 | Double_t yj; | |
2037 | Double_t y=TMath::Abs(*py); | |
2038 | // | |
2039 | if (y < ky0) | |
2040 | yj=kb; | |
2041 | else | |
2042 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2043 | return yj; | |
2044 | } | |
2045 | ||
75e0cc59 | 2046 | Double_t AliGenMUONlib::YChic1(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2047 | { |
2048 | // Chi-1c y | |
2049 | const Double_t ky0 = 4.; | |
2050 | const Double_t kb=1.; | |
2051 | Double_t yj; | |
2052 | Double_t y=TMath::Abs(*py); | |
2053 | // | |
2054 | if (y < ky0) | |
2055 | yj=kb; | |
2056 | else | |
2057 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2058 | return yj; | |
2059 | } | |
2060 | ||
75e0cc59 | 2061 | Double_t AliGenMUONlib::YChic2(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2062 | { |
2063 | // Chi-2c y | |
2064 | const Double_t ky0 = 4.; | |
2065 | const Double_t kb=1.; | |
2066 | Double_t yj; | |
2067 | Double_t y=TMath::Abs(*py); | |
2068 | // | |
2069 | if (y < ky0) | |
2070 | yj=kb; | |
2071 | else | |
2072 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2073 | return yj; | |
2074 | } | |
2075 | ||
75e0cc59 | 2076 | Double_t AliGenMUONlib::YChic(const Double_t *py, const Double_t */*dummy*/) |
00935af2 | 2077 | { |
2078 | // Chi_c family y | |
2079 | const Double_t ky0 = 4.; | |
2080 | const Double_t kb=1.; | |
2081 | Double_t yj; | |
2082 | Double_t y=TMath::Abs(*py); | |
2083 | // | |
2084 | if (y < ky0) | |
2085 | yj=kb; | |
2086 | else | |
2087 | yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2); | |
2088 | return yj; | |
2089 | } | |
2090 | ||
2091 | // particle composition | |
2092 | // | |
6b450aa0 | 2093 | Int_t AliGenMUONlib::IpChic0(TRandom *) |
00935af2 | 2094 | { |
2095 | // Chi composition | |
2096 | return 10441; | |
2097 | } | |
2098 | // | |
6b450aa0 | 2099 | Int_t AliGenMUONlib::IpChic1(TRandom *) |
00935af2 | 2100 | { |
2101 | // Chi composition | |
2102 | return 20443; | |
2103 | } | |
6b450aa0 | 2104 | Int_t AliGenMUONlib::IpChic2(TRandom *) |
00935af2 | 2105 | { |
2106 | // Chi_c2 prime composition | |
2107 | return 445; | |
2108 | } | |
6b450aa0 | 2109 | Int_t AliGenMUONlib::IpChic(TRandom *) |
00935af2 | 2110 | { |
2111 | // Chi composition | |
2112 | Int_t ip; | |
2113 | Float_t r = gRandom->Rndm(); | |
2114 | if (r < 0.001) { | |
2115 | ip = 10441; | |
2116 | } else if( r < 0.377 ) { | |
2117 | ip = 20443; | |
2118 | } else { | |
2119 | ip = 445; | |
2120 | } | |
2121 | return ip; | |
2122 | } | |
2123 | ||
2124 | ||
2125 | //_____________________________________________________________ | |
2126 | ||
65fb704d | 2127 | typedef Int_t (*GenFuncIp) (TRandom *); |
198bb1c7 | 2128 | GenFuncIp AliGenMUONlib::GetIp(Int_t param, const char* /*tname*/) const |
fe4da5cc | 2129 | { |
d90f80fd | 2130 | // Return pointer to particle type parameterisation |
fe4da5cc | 2131 | GenFuncIp func; |
753690b0 | 2132 | switch (param) |
fe4da5cc | 2133 | { |
34f60c01 | 2134 | case kPhi: |
fe4da5cc | 2135 | func=IpPhi; |
2136 | break; | |
89512a3b | 2137 | case kEta: |
2138 | func=IpEta; | |
2139 | break; | |
2140 | case kOmega: | |
2141 | func=IpOmega; | |
2142 | break; | |
0ad09590 | 2143 | case kJpsiFamily: |
2144 | func=IpJpsiFamily; | |
2145 | break; | |
88e5db43 | 2146 | case kPsiP: |
2147 | func=IpPsiP; | |
2148 | break; | |
34f60c01 | 2149 | case kJpsi: |
17d28ba5 | 2150 | case kJpsiFromB: |
fe4da5cc | 2151 | func=IpJpsi; |
2152 | break; | |
34f60c01 | 2153 | case kUpsilon: |
fe4da5cc | 2154 | func=IpUpsilon; |
2155 | break; | |
0ad09590 | 2156 | case kUpsilonFamily: |
2157 | func=IpUpsilonFamily; | |
2158 | break; | |
88e5db43 | 2159 | case kUpsilonP: |
2160 | func=IpUpsilonP; | |
2161 | break; | |
2162 | case kUpsilonPP: | |
2163 | func=IpUpsilonPP; | |
2164 | break; | |
34f60c01 | 2165 | case kCharm: |
fe4da5cc | 2166 | func=IpCharm; |
2167 | break; | |
34f60c01 | 2168 | case kBeauty: |
fe4da5cc | 2169 | func=IpBeauty; |
2170 | break; | |
34f60c01 | 2171 | case kPion: |
753690b0 | 2172 | func=IpPion; |
2173 | break; | |
34f60c01 | 2174 | case kKaon: |
753690b0 | 2175 | func=IpKaon; |
2176 | break; | |
6b450aa0 | 2177 | case kChic0: |
2178 | func=IpChic0; | |
00935af2 | 2179 | break; |
6b450aa0 | 2180 | case kChic1: |
2181 | func=IpChic1; | |
00935af2 | 2182 | break; |
6b450aa0 | 2183 | case kChic2: |
2184 | func=IpChic2; | |
00935af2 | 2185 | break; |
6b450aa0 | 2186 | case kChic: |
2187 | func=IpChic; | |
00935af2 | 2188 | break; |
119b35c7 | 2189 | default: |
2190 | func=0; | |
2191 | printf("<AliGenMUONlib::GetIp> unknown parametrisation\n"); | |
fe4da5cc | 2192 | } |
2193 | return func; | |
2194 | } | |
2195 | ||
2196 | ||
753690b0 | 2197 | |
05932df6 | 2198 | Float_t AliGenMUONlib::Interpolate(Float_t x, Float_t* y, Float_t x0, |
2199 | Float_t dx, | |
2200 | Int_t n, Int_t no) | |
2201 | { | |
2202 | // | |
2203 | // Neville's alorithm for interpolation | |
2204 | // | |
2205 | // x: x-value | |
2206 | // y: Input array | |
2207 | // x0: minimum x | |
2208 | // dx: step size | |
2209 | // n: number of data points | |
2210 | // no: order of polynom | |
2211 | // | |
2212 | Float_t* c = new Float_t[n]; | |
2213 | Float_t* d = new Float_t[n]; | |
2214 | Int_t m, i; | |
2215 | for (i = 0; i < n; i++) { | |
2216 | c[i] = y[i]; | |
2217 | d[i] = y[i]; | |
2218 | } | |
2219 | ||
2220 | Int_t ns = int((x - x0)/dx); | |
2221 | ||
2222 | Float_t y1 = y[ns]; | |
2223 | ns--; | |
2224 | for (m = 0; m < no; m++) { | |
2225 | for (i = 0; i < n-m; i++) { | |
2226 | Float_t ho = x0 + Float_t(i) * dx - x; | |
2227 | Float_t hp = x0 + Float_t(i+m+1) * dx - x; | |
2228 | Float_t w = c[i+1] - d[i]; | |
2229 | Float_t den = ho-hp; | |
2230 | den = w/den; | |
2231 | d[i] = hp * den; | |
2232 | c[i] = ho * den; | |
2233 | } | |
2234 | Float_t dy; | |
2235 | ||
2236 | if (2*ns < (n-m-1)) { | |
2237 | dy = c[ns+1]; | |
2238 | } else { | |
2239 | dy = d[ns--]; | |
2240 | } | |
2241 | y1 += dy;} | |
2242 | delete[] c; | |
2243 | delete[] d; | |
2244 | ||
2245 | return y1; | |
2246 | } | |
2247 | ||
753690b0 | 2248 |