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74c62c73 | 1 | |
886b6f73 | 2 | /************************************************************************** |
3 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * * | |
5 | * Author: The ALICE Off-line Project. * | |
6 | * Contributors are mentioned in the code where appropriate. * | |
7 | * * | |
8 | * Permission to use, copy, modify and distribute this software and its * | |
9 | * documentation strictly for non-commercial purposes is hereby granted * | |
10 | * without fee, provided that the above copyright notice appears in all * | |
11 | * copies and that both the copyright notice and this permission notice * | |
12 | * appear in the supporting documentation. The authors make no claims * | |
13 | * about the suitability of this software for any purpose. It is * | |
14 | * provided "as is" without express or implied warranty. * | |
15 | **************************************************************************/ | |
16 | ||
17 | /* | |
18 | $Log$ | |
a04b490f | 19 | Revision 1.9 2002/04/23 12:54:29 morsch |
20 | New options kPi0Flat y kEtaFlat (Gustavo Conesa) | |
21 | ||
8a1ead98 | 22 | Revision 1.7 2001/03/09 13:01:41 morsch |
23 | - enum constants for paramterisation type (particle family) moved to AliGen*lib.h | |
24 | - use AliGenGSIlib::kUpsilon, AliGenPHOSlib::kEtaPrime to access the constants | |
25 | ||
34f60c01 | 26 | Revision 1.6 2000/11/30 07:12:50 alibrary |
27 | Introducing new Rndm and QA classes | |
28 | ||
65fb704d | 29 | Revision 1.5 2000/06/29 21:08:27 morsch |
30 | All paramatrisation libraries derive from the pure virtual base class AliGenLib. | |
31 | This allows to pass a pointer to a library directly to AliGenParam and avoids the | |
32 | use of function pointers in Config.C. | |
33 | ||
b22ee262 | 34 | Revision 1.4 2000/06/14 15:21:05 morsch |
35 | Include clean-up (IH) | |
36 | ||
5c3fd7ea | 37 | Revision 1.3 2000/06/09 20:32:54 morsch |
38 | All coding rule violations except RS3 corrected | |
39 | ||
f87cfe57 | 40 | Revision 1.2 1999/11/04 11:30:48 fca |
41 | Improve comments | |
42 | ||
9ae59e17 | 43 | Revision 1.1 1999/11/03 17:43:20 fca |
44 | New version from G.Martinez & A.Morsch | |
45 | ||
886b6f73 | 46 | */ |
47 | ||
48 | //====================================================================== | |
49 | // AliGenPHOSlib class contains parameterizations of the | |
50 | // pion, kaon, eta, omega, etaprime, phi and baryon (proton, | |
51 | // antiproton, neutron and anti-neutron) particles for the | |
52 | // study of the neutral background in PHOS detector. | |
53 | // These parameterizations are used by the | |
54 | // AliGenParam class: | |
55 | // AliGenParam(npar, param, AliGenPHOSlib::GetPt(param), | |
56 | // AliGenPHOSlib::GetY(param), | |
57 | // AliGenPHOSlib::GetIp(param) ) | |
58 | // param represents the particle to be simulated : | |
59 | // Pion, Kaon, Eta, Omega, Etaprime, Phi or Baryon | |
60 | // Pt distributions are calculated from the transverse mass scaling | |
9ae59e17 | 61 | // with Pions, using the PtScal function taken from AliGenMUONlib |
886b6f73 | 62 | // version aliroot 3.01 |
63 | // | |
9ae59e17 | 64 | // Gines MARTINEZ. Laurent APHECETCHE and Yves SCHUTZ |
65 | // GPS @ SUBATECH, Nantes , France (October 1999) | |
886b6f73 | 66 | // http://www-subatech.in2p3.fr/~photons/subatech |
67 | // martinez@subatech.in2p3.fr | |
68 | //====================================================================== | |
69 | ||
65fb704d | 70 | #include "TMath.h" |
71 | #include "TRandom.h" | |
72 | ||
886b6f73 | 73 | #include "AliGenPHOSlib.h" |
886b6f73 | 74 | |
75 | ClassImp(AliGenPHOSlib) | |
76 | ||
77 | //====================================================================== | |
78 | // P I O N S | |
79 | // (From GetPt, GetY and GetIp as param = Pion) | |
80 | // Transverse momentum distribution" PtPion | |
81 | // Rapidity distribution YPion | |
82 | // Particle distribution IdPion 111, 211 and -211 (pi0, pi+ and pi-) | |
83 | // | |
84 | Double_t AliGenPHOSlib::PtPion(Double_t *px, Double_t *) | |
85 | { | |
86 | // Pion transverse momentum distribtuion taken | |
9ae59e17 | 87 | // from AliGenMUONlib class, version 3.01 of aliroot |
886b6f73 | 88 | // PT-PARAMETERIZATION CDF, PRL 61(88) 1819 |
89 | // POWER LAW FOR PT > 500 MEV | |
90 | // MT SCALING BELOW (T=160 MEV) | |
91 | // | |
f87cfe57 | 92 | const Double_t kp0 = 1.3; |
93 | const Double_t kxn = 8.28; | |
94 | const Double_t kxlim=0.5; | |
95 | const Double_t kt=0.160; | |
96 | const Double_t kxmpi=0.139; | |
97 | const Double_t kb=1.; | |
98 | Double_t y, y1, kxmpi2, ynorm, a; | |
886b6f73 | 99 | Double_t x=*px; |
100 | // | |
f87cfe57 | 101 | y1=TMath::Power(kp0/(kp0+kxlim),kxn); |
102 | kxmpi2=kxmpi*kxmpi; | |
103 | ynorm=kb*(TMath::Exp(-sqrt(kxlim*kxlim+kxmpi2)/kt)); | |
886b6f73 | 104 | a=ynorm/y1; |
f87cfe57 | 105 | if (x > kxlim) |
106 | y=a*TMath::Power(kp0/(kp0+x),kxn); | |
886b6f73 | 107 | else |
f87cfe57 | 108 | y=kb*TMath::Exp(-sqrt(x*x+kxmpi2)/kt); |
886b6f73 | 109 | return y*x; |
110 | } | |
886b6f73 | 111 | Double_t AliGenPHOSlib::YPion( Double_t *py, Double_t *) |
112 | { | |
f87cfe57 | 113 | // |
114 | // pion y-distribution | |
115 | // | |
116 | ||
117 | const Double_t ka = 7000.; | |
118 | const Double_t kdy = 4.; | |
886b6f73 | 119 | |
120 | Double_t y=TMath::Abs(*py); | |
121 | // | |
f87cfe57 | 122 | Double_t ex = y*y/(2*kdy*kdy); |
123 | return ka*TMath::Exp(-ex); | |
886b6f73 | 124 | } |
f87cfe57 | 125 | |
65fb704d | 126 | Int_t AliGenPHOSlib::IpPion(TRandom *ran) |
886b6f73 | 127 | { |
f87cfe57 | 128 | // particle composition pi+, pi0, pi- |
129 | // | |
130 | ||
74c62c73 | 131 | Float_t random = ran->Rndm(); |
132 | ||
133 | if ( (3.*random) < 1. ) | |
134 | { | |
135 | return 211 ; | |
136 | } | |
137 | else | |
138 | { | |
139 | if ( (3.*random) >= 2.) | |
140 | { | |
141 | return -211 ; | |
142 | } | |
143 | else | |
144 | { | |
886b6f73 | 145 | return 111 ; |
146 | } | |
147 | } | |
148 | } | |
74c62c73 | 149 | |
150 | //End Pions | |
151 | //====================================================================== | |
152 | // Pi 0 Flat Distribution | |
153 | // Transverse momentum distribution PtPi0Flat | |
154 | // Rapidity distribution YPi0Flat | |
155 | // Particle distribution IdPi0Flat 111 (pi0) | |
156 | // | |
157 | ||
158 | Double_t AliGenPHOSlib::PtPi0Flat(Double_t *px, Double_t *) | |
159 | { | |
160 | // Pion transverse momentum flat distribution | |
161 | ||
162 | return 1; | |
163 | ||
164 | } | |
165 | ||
166 | Double_t AliGenPHOSlib::YPi0Flat( Double_t *py, Double_t *) | |
167 | { | |
168 | ||
169 | // pion y-distribution | |
170 | // | |
171 | return 1.; | |
172 | } | |
173 | ||
174 | Int_t AliGenPHOSlib::IpPi0Flat(TRandom *) | |
175 | { | |
176 | ||
177 | // particle composition pi0 | |
178 | // | |
179 | return 111 ; | |
180 | } | |
181 | // End Pi0Flat | |
886b6f73 | 182 | //============================================================= |
183 | // | |
f87cfe57 | 184 | Double_t AliGenPHOSlib::PtScal(Double_t pt, Int_t np) |
185 | { | |
886b6f73 | 186 | // Mt-scaling |
187 | // Fonction for the calculation of the Pt distribution for a | |
188 | // given particle np, from the pion Pt distribution using the | |
189 | // mt scaling. This function was taken from AliGenMUONlib | |
190 | // aliroot version 3.01, and was extended for baryons | |
191 | // np = 1=>Pions 2=>Kaons 3=>Etas 4=>Omegas 5=>ETA' 6=>PHI | |
192 | // 7=>BARYONS-BARYONBARS | |
f87cfe57 | 193 | |
886b6f73 | 194 | // SCALING EN MASSE PAR RAPPORT A PTPI |
195 | // MASS 1=>PI, 2=>K, 3=>ETA, 4=>OMEGA, 5=>ETA',6=>PHI | |
f87cfe57 | 196 | const Double_t khm[10] = {0.1396, 0.494, 0.547, 0.782, 0.957, 1.02, |
886b6f73 | 197 | // MASS 7=>BARYON-BARYONBAR |
198 | 0.938, 0. , 0., 0.}; | |
199 | // VALUE MESON/PI AT 5 GEV | |
f87cfe57 | 200 | const Double_t kfmax[10]={1., 1., 1., 1., 1., 1., 1., 1., 1., 1.}; |
886b6f73 | 201 | np--; |
f87cfe57 | 202 | Double_t f5=TMath::Power(((sqrt(100.018215)+2.)/(sqrt(100.+khm[np]*khm[np])+2.0)),12.3); |
203 | Double_t kfmax2=f5/kfmax[np]; | |
886b6f73 | 204 | // PIONS |
205 | Double_t ptpion=100.*PtPion(&pt, (Double_t*) 0); | |
206 | Double_t fmtscal=TMath::Power(((sqrt(pt*pt+0.018215)+2.)/ | |
f87cfe57 | 207 | (sqrt(pt*pt+khm[np]*khm[np])+2.0)),12.3)/ kfmax2; |
886b6f73 | 208 | return fmtscal*ptpion; |
74c62c73 | 209 | |
886b6f73 | 210 | } |
211 | // End Scaling | |
212 | //============================================================================ | |
213 | // K A O N S | |
886b6f73 | 214 | Double_t AliGenPHOSlib::PtKaon( Double_t *px, Double_t *) |
215 | { | |
f87cfe57 | 216 | // kaon |
217 | // pt-distribution | |
218 | //____________________________________________________________ | |
219 | ||
886b6f73 | 220 | return PtScal(*px,2); // 2==> Kaon in the PtScal function |
221 | } | |
222 | ||
886b6f73 | 223 | Double_t AliGenPHOSlib::YKaon( Double_t *py, Double_t *) |
224 | { | |
f87cfe57 | 225 | // y-distribution |
226 | //____________________________________________________________ | |
227 | ||
228 | const Double_t ka = 1000.; | |
229 | const Double_t kdy = 4.; | |
886b6f73 | 230 | |
231 | ||
232 | Double_t y=TMath::Abs(*py); | |
233 | // | |
f87cfe57 | 234 | Double_t ex = y*y/(2*kdy*kdy); |
235 | return ka*TMath::Exp(-ex); | |
886b6f73 | 236 | } |
237 | ||
65fb704d | 238 | Int_t AliGenPHOSlib::IpKaon(TRandom *ran) |
886b6f73 | 239 | { |
f87cfe57 | 240 | // particle composition |
241 | // | |
242 | ||
65fb704d | 243 | Float_t random = ran->Rndm(); |
244 | Float_t random2 = ran->Rndm(); | |
245 | if (random2 < 0.5) | |
886b6f73 | 246 | { |
65fb704d | 247 | if (random < 0.5) { |
886b6f73 | 248 | return 321; // K+ |
249 | } else { | |
250 | return -321; // K- | |
251 | } | |
252 | } | |
253 | else | |
254 | { | |
65fb704d | 255 | if (random < 0.5) { |
9ae59e17 | 256 | return 130; // K^0 short |
886b6f73 | 257 | } else { |
9ae59e17 | 258 | return 310; // K^0 long |
886b6f73 | 259 | } |
260 | } | |
261 | } | |
262 | // End Kaons | |
263 | //============================================================================ | |
264 | //============================================================================ | |
265 | // E T A S | |
886b6f73 | 266 | Double_t AliGenPHOSlib::PtEta( Double_t *px, Double_t *) |
267 | { | |
f87cfe57 | 268 | // etas |
269 | // pt-distribution | |
270 | //____________________________________________________________ | |
271 | ||
886b6f73 | 272 | return PtScal(*px,3); // 3==> Eta in the PtScal function |
273 | } | |
274 | ||
886b6f73 | 275 | Double_t AliGenPHOSlib::YEta( Double_t *py, Double_t *) |
276 | { | |
f87cfe57 | 277 | // y-distribution |
278 | //____________________________________________________________ | |
279 | ||
280 | const Double_t ka = 1000.; | |
281 | const Double_t kdy = 4.; | |
886b6f73 | 282 | |
283 | ||
284 | Double_t y=TMath::Abs(*py); | |
285 | // | |
f87cfe57 | 286 | Double_t ex = y*y/(2*kdy*kdy); |
287 | return ka*TMath::Exp(-ex); | |
886b6f73 | 288 | } |
289 | ||
65fb704d | 290 | Int_t AliGenPHOSlib::IpEta(TRandom *) |
886b6f73 | 291 | { |
f87cfe57 | 292 | // particle composition |
293 | // | |
294 | ||
886b6f73 | 295 | return 221; // eta |
296 | } | |
297 | // End Etas | |
74c62c73 | 298 | |
299 | //====================================================================== | |
300 | // Eta Flat Distribution | |
301 | // Transverse momentum distribution PtEtaFlat | |
302 | // Rapidity distribution YEtaFlat | |
303 | // Particle distribution IdEtaFlat 111 (pi0) | |
304 | // | |
305 | ||
306 | Double_t AliGenPHOSlib::PtEtaFlat(Double_t *px, Double_t *) | |
307 | { | |
308 | // Eta transverse momentum flat distribution | |
309 | ||
310 | return 1; | |
311 | ||
312 | } | |
313 | ||
314 | Double_t AliGenPHOSlib::YEtaFlat( Double_t *py, Double_t *) | |
315 | { | |
316 | // | |
317 | // pion y-distribution | |
318 | // | |
319 | return 1.; | |
320 | } | |
321 | ||
322 | Int_t AliGenPHOSlib::IpEtaFlat(TRandom *) | |
323 | { | |
324 | // | |
325 | // particle composition eta | |
326 | // | |
327 | return 221 ; | |
328 | } | |
329 | // End Pi0Flat | |
886b6f73 | 330 | //============================================================================ |
331 | //============================================================================ | |
332 | // O M E G A S | |
f87cfe57 | 333 | Double_t AliGenPHOSlib::PtOmega( Double_t *px, Double_t *) |
334 | { | |
886b6f73 | 335 | // omegas |
336 | // pt-distribution | |
337 | //____________________________________________________________ | |
f87cfe57 | 338 | |
886b6f73 | 339 | return PtScal(*px,4); // 4==> Omega in the PtScal function |
340 | } | |
341 | ||
886b6f73 | 342 | Double_t AliGenPHOSlib::YOmega( Double_t *py, Double_t *) |
343 | { | |
f87cfe57 | 344 | // y-distribution |
345 | //____________________________________________________________ | |
346 | ||
347 | const Double_t ka = 1000.; | |
348 | const Double_t kdy = 4.; | |
886b6f73 | 349 | |
350 | ||
351 | Double_t y=TMath::Abs(*py); | |
352 | // | |
f87cfe57 | 353 | Double_t ex = y*y/(2*kdy*kdy); |
354 | return ka*TMath::Exp(-ex); | |
886b6f73 | 355 | } |
356 | ||
65fb704d | 357 | Int_t AliGenPHOSlib::IpOmega(TRandom *) |
886b6f73 | 358 | { |
f87cfe57 | 359 | // particle composition |
360 | // | |
361 | ||
886b6f73 | 362 | return 223; // Omega |
363 | } | |
364 | // End Omega | |
365 | //============================================================================ | |
366 | //============================================================================ | |
367 | // E T A P R I M E | |
f87cfe57 | 368 | Double_t AliGenPHOSlib::PtEtaprime( Double_t *px, Double_t *) |
369 | { | |
886b6f73 | 370 | // etaprime |
371 | // pt-distribution | |
372 | //____________________________________________________________ | |
f87cfe57 | 373 | |
886b6f73 | 374 | return PtScal(*px,5); // 5==> Etaprime in the PtScal function |
375 | } | |
376 | ||
886b6f73 | 377 | Double_t AliGenPHOSlib::YEtaprime( Double_t *py, Double_t *) |
378 | { | |
f87cfe57 | 379 | // y-distribution |
380 | //____________________________________________________________ | |
381 | ||
382 | const Double_t ka = 1000.; | |
383 | const Double_t kdy = 4.; | |
886b6f73 | 384 | |
385 | ||
386 | Double_t y=TMath::Abs(*py); | |
387 | // | |
f87cfe57 | 388 | Double_t ex = y*y/(2*kdy*kdy); |
389 | return ka*TMath::Exp(-ex); | |
886b6f73 | 390 | } |
391 | ||
65fb704d | 392 | Int_t AliGenPHOSlib::IpEtaprime(TRandom *) |
886b6f73 | 393 | { |
f87cfe57 | 394 | // particle composition |
395 | // | |
396 | ||
886b6f73 | 397 | return 331; // Etaprime |
398 | } | |
399 | // End EtaPrime | |
400 | //=================================================================== | |
401 | //============================================================================ | |
402 | // P H I S | |
f87cfe57 | 403 | Double_t AliGenPHOSlib::PtPhi( Double_t *px, Double_t *) |
404 | { | |
886b6f73 | 405 | // phi |
406 | // pt-distribution | |
407 | //____________________________________________________________ | |
f87cfe57 | 408 | |
886b6f73 | 409 | return PtScal(*px,6); // 6==> Phi in the PtScal function |
410 | } | |
411 | ||
886b6f73 | 412 | Double_t AliGenPHOSlib::YPhi( Double_t *py, Double_t *) |
413 | { | |
f87cfe57 | 414 | // y-distribution |
415 | //____________________________________________________________ | |
416 | ||
417 | const Double_t ka = 1000.; | |
418 | const Double_t kdy = 4.; | |
886b6f73 | 419 | |
420 | ||
421 | Double_t y=TMath::Abs(*py); | |
422 | // | |
f87cfe57 | 423 | Double_t ex = y*y/(2*kdy*kdy); |
424 | return ka*TMath::Exp(-ex); | |
886b6f73 | 425 | } |
426 | ||
65fb704d | 427 | Int_t AliGenPHOSlib::IpPhi(TRandom *) |
f87cfe57 | 428 | { |
886b6f73 | 429 | // particle composition |
430 | // | |
f87cfe57 | 431 | |
886b6f73 | 432 | return 333; // Phi |
433 | } | |
434 | // End Phis | |
435 | //=================================================================== | |
436 | //============================================================================ | |
437 | // B A R Y O N S == protons, protonsbar, neutrons, and neutronsbars | |
f87cfe57 | 438 | Double_t AliGenPHOSlib::PtBaryon( Double_t *px, Double_t *) |
439 | { | |
886b6f73 | 440 | // baryons |
441 | // pt-distribution | |
442 | //____________________________________________________________ | |
f87cfe57 | 443 | |
886b6f73 | 444 | return PtScal(*px,7); // 7==> Baryon in the PtScal function |
445 | } | |
446 | ||
886b6f73 | 447 | Double_t AliGenPHOSlib::YBaryon( Double_t *py, Double_t *) |
448 | { | |
f87cfe57 | 449 | // y-distribution |
450 | //____________________________________________________________ | |
451 | ||
452 | const Double_t ka = 1000.; | |
453 | const Double_t kdy = 4.; | |
886b6f73 | 454 | |
455 | ||
456 | Double_t y=TMath::Abs(*py); | |
457 | // | |
f87cfe57 | 458 | Double_t ex = y*y/(2*kdy*kdy); |
459 | return ka*TMath::Exp(-ex); | |
886b6f73 | 460 | } |
461 | ||
65fb704d | 462 | Int_t AliGenPHOSlib::IpBaryon(TRandom *ran) |
886b6f73 | 463 | { |
f87cfe57 | 464 | // particle composition |
465 | // | |
466 | ||
65fb704d | 467 | Float_t random = ran->Rndm(); |
468 | Float_t random2 = ran->Rndm(); | |
469 | if (random2 < 0.5) | |
886b6f73 | 470 | { |
65fb704d | 471 | if (random < 0.5) { |
886b6f73 | 472 | return 2212; // p |
473 | } else { | |
474 | return -2212; // pbar | |
475 | } | |
476 | } | |
477 | else | |
478 | { | |
65fb704d | 479 | if (random < 0.5) { |
886b6f73 | 480 | return 2112; // n |
481 | } else { | |
482 | return -2112; // n bar | |
483 | } | |
484 | } | |
485 | } | |
486 | // End Baryons | |
487 | //=================================================================== | |
488 | ||
489 | ||
74c62c73 | 490 | typedef Double_t (*GenFunc) (Double_t*, Double_t*); |
a04b490f | 491 | GenFunc AliGenPHOSlib::GetPt(Int_t param, const char* tname) const |
886b6f73 | 492 | { |
f87cfe57 | 493 | // Return pinter to pT parameterisation |
886b6f73 | 494 | GenFunc func; |
495 | ||
496 | switch (param) | |
497 | { | |
34f60c01 | 498 | case kPion: |
886b6f73 | 499 | func=PtPion; |
500 | break; | |
74c62c73 | 501 | case kPi0Flat: |
502 | func=PtPi0Flat; | |
503 | break; | |
34f60c01 | 504 | case kKaon: |
886b6f73 | 505 | func=PtKaon; |
506 | break; | |
34f60c01 | 507 | case kEta: |
886b6f73 | 508 | func=PtEta; |
509 | break; | |
74c62c73 | 510 | case kEtaFlat: |
511 | func=PtEtaFlat; | |
512 | break; | |
34f60c01 | 513 | case kOmega: |
886b6f73 | 514 | func=PtOmega; |
515 | break; | |
34f60c01 | 516 | case kEtaPrime: |
886b6f73 | 517 | func=PtEtaprime; |
518 | break; | |
34f60c01 | 519 | case kBaryon: |
886b6f73 | 520 | func=PtBaryon; |
521 | break; | |
522 | default: | |
523 | func=0; | |
524 | printf("<AliGenPHOSlib::GetPt> unknown parametrisationn"); | |
525 | } | |
526 | return func; | |
527 | } | |
528 | ||
a04b490f | 529 | GenFunc AliGenPHOSlib::GetY(Int_t param, const char* tname) const |
886b6f73 | 530 | { |
f87cfe57 | 531 | // Return pointer to Y parameterisation |
886b6f73 | 532 | GenFunc func; |
533 | switch (param) | |
534 | { | |
34f60c01 | 535 | case kPion: |
886b6f73 | 536 | func=YPion; |
537 | break; | |
74c62c73 | 538 | case kPi0Flat: |
539 | func=YPi0Flat; | |
540 | break; | |
34f60c01 | 541 | case kKaon: |
886b6f73 | 542 | func=YKaon; |
543 | break; | |
34f60c01 | 544 | case kEta: |
886b6f73 | 545 | func=YEta; |
546 | break; | |
74c62c73 | 547 | case kEtaFlat: |
548 | func=YEtaFlat; | |
549 | break; | |
34f60c01 | 550 | case kOmega: |
886b6f73 | 551 | func=YOmega; |
552 | break; | |
34f60c01 | 553 | case kEtaPrime: |
886b6f73 | 554 | func=YEtaprime; |
555 | break; | |
34f60c01 | 556 | case kPhi: |
886b6f73 | 557 | func=YPhi; |
558 | break; | |
34f60c01 | 559 | case kBaryon: |
886b6f73 | 560 | func=YBaryon; |
561 | break; | |
562 | default: | |
563 | func=0; | |
564 | printf("<AliGenPHOSlib::GetY> unknown parametrisationn"); | |
565 | } | |
566 | return func; | |
567 | } | |
65fb704d | 568 | typedef Int_t (*GenFuncIp) (TRandom *); |
a04b490f | 569 | GenFuncIp AliGenPHOSlib::GetIp(Int_t param, const char* tname) const |
886b6f73 | 570 | { |
f87cfe57 | 571 | // Return pointer to particle composition |
886b6f73 | 572 | GenFuncIp func; |
573 | switch (param) | |
574 | { | |
74c62c73 | 575 | case kPion: |
886b6f73 | 576 | func=IpPion; |
577 | break; | |
74c62c73 | 578 | case kPi0Flat: |
579 | func=IpPi0Flat; | |
580 | break; | |
34f60c01 | 581 | case kKaon: |
886b6f73 | 582 | func=IpKaon; |
583 | break; | |
34f60c01 | 584 | case kEta: |
886b6f73 | 585 | func=IpEta; |
586 | break; | |
74c62c73 | 587 | case kEtaFlat: |
588 | func=IpEtaFlat; | |
589 | break; | |
590 | ||
34f60c01 | 591 | case kOmega: |
886b6f73 | 592 | func=IpOmega; |
593 | break; | |
34f60c01 | 594 | case kEtaPrime: |
886b6f73 | 595 | func=IpEtaprime; |
596 | break; | |
34f60c01 | 597 | case kPhi: |
886b6f73 | 598 | func=IpPhi; |
599 | break; | |
34f60c01 | 600 | case kBaryon: |
886b6f73 | 601 | func=IpBaryon; |
602 | break; | |
603 | default: | |
604 | func=0; | |
605 | printf("<AliGenPHOSlib::GetIp> unknown parametrisationn"); | |
606 | } | |
607 | return func; | |
608 | } | |
609 |