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d1590034 | 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 | ||
926ecde4 | 16 | /* $Id$ */ |
17 | ||
d1590034 | 18 | // Library class for particle pt and y distributions used for |
19 | // HMPID simulations. | |
20 | // To be used with AliGenParam. | |
21 | // The following particle typed can be simulated: | |
22 | // phi, lambda, k | |
23 | // | |
24 | // Author: Annalisa Mastroserio <Annalisa.Mastroserio@ba.infn.it> | |
25 | // | |
26 | // | |
27 | ||
28 | #include <TRandom.h> | |
29 | #include <TString.h> | |
30 | #include <AliLog.h> | |
31 | #include "AliGenRICHlib.h" | |
fac5662b | 32 | #include <TPDGCode.h> |
d1590034 | 33 | |
34 | ClassImp(AliGenRICHlib) | |
35 | ||
926ecde4 | 36 | //--------------------------------------- |
37 | // Pi Plus | |
38 | //--------------------------------------- | |
39 | Int_t AliGenRICHlib::IpPiPlus(TRandom *) | |
40 | { | |
41 | //PDG code | |
42 | return 211; | |
43 | } | |
44 | ||
45 | Double_t AliGenRICHlib::PtPiPlusFlat( Double_t *, Double_t *) | |
46 | { | |
47 | //PiPlus FLAT pt-distribution | |
48 | return 1; | |
49 | } | |
50 | ||
51 | Double_t AliGenRICHlib::PtPiPlusExp( Double_t *x, Double_t *) | |
52 | { | |
53 | //PiPlus EXP pt-distribution | |
54 | return x[0]*TMath::Exp(-x[0]/0.17); | |
55 | } | |
56 | ||
57 | Double_t AliGenRICHlib::YPiPlusFlat(Double_t *,Double_t *) | |
58 | { | |
59 | //PiPlus y-distribution | |
60 | return 1; | |
61 | } | |
62 | ||
63 | ||
64 | //--------------------------------------- | |
65 | // Pi Minus | |
66 | //--------------------------------------- | |
67 | Int_t AliGenRICHlib::IpPiMinus(TRandom *) | |
68 | { | |
69 | //PDG code | |
70 | return -211; | |
71 | } | |
72 | ||
73 | Double_t AliGenRICHlib::PtPiMinusFlat( Double_t *, Double_t *) | |
74 | { | |
75 | // PiMinus FLAT pt-distribution | |
76 | return 1; | |
77 | } | |
78 | ||
79 | Double_t AliGenRICHlib::PtPiMinusExp( Double_t *x, Double_t *) | |
80 | { | |
81 | //PiMinus EXP pt-distribution | |
82 | return x[0]*TMath::Exp(-x[0]/0.17); | |
83 | } | |
84 | ||
85 | Double_t AliGenRICHlib::YPiMinusFlat(Double_t *,Double_t *) | |
86 | { | |
87 | //PiMinus y-distribution | |
88 | return 1; | |
89 | } | |
90 | ||
91 | ||
92 | //-------------------------------------------- | |
93 | // K Plus | |
94 | //-------------------------------------------- | |
95 | Int_t AliGenRICHlib::IpKPlus(TRandom *) | |
96 | { | |
97 | //PDG code | |
98 | return 321; | |
99 | } | |
100 | ||
101 | Double_t AliGenRICHlib::PtKPlusFlat( Double_t *, Double_t *) | |
102 | { | |
103 | // K+ FLAT pt-distribution | |
104 | return 1; | |
105 | } | |
106 | ||
107 | Double_t AliGenRICHlib::PtKPlusExp( Double_t *x, Double_t *) | |
108 | { | |
109 | // K+ EXP pt-distribution | |
110 | return x[0]*TMath::Exp(-x[0]/0.17); | |
111 | } | |
112 | ||
113 | Double_t AliGenRICHlib::YKPlusFlat(Double_t *,Double_t *) | |
114 | { | |
115 | // K+ y-distribution | |
116 | return 1; | |
117 | } | |
118 | ||
119 | ||
120 | //----------------------------------------------- | |
121 | // K Minus | |
122 | //----------------------------------------------- | |
123 | Int_t AliGenRICHlib::IpKMinus(TRandom *) | |
124 | { | |
125 | //PDG code | |
126 | return -321; | |
127 | } | |
128 | ||
129 | Double_t AliGenRICHlib::PtKMinusFlat( Double_t *, Double_t *) | |
130 | { | |
131 | // K- FLAT pt-distribution | |
132 | return 1; | |
133 | } | |
134 | ||
135 | Double_t AliGenRICHlib::PtKMinusExp( Double_t *x, Double_t *) | |
136 | { | |
137 | // K- EXP pt-distribution | |
138 | return x[0]*TMath::Exp(-x[0]/0.17); | |
139 | } | |
140 | ||
141 | Double_t AliGenRICHlib::YKMinusFlat(Double_t *,Double_t *) | |
142 | { | |
143 | // K- y-distribution | |
144 | return 1; | |
145 | } | |
146 | ||
147 | ||
148 | //----------------------------------------------- | |
149 | // K0 short | |
150 | //----------------------------------------------- | |
151 | Int_t AliGenRICHlib::IpK0s(TRandom *) | |
152 | { | |
153 | //PDG code | |
154 | return 310; | |
155 | } | |
156 | ||
157 | Double_t AliGenRICHlib::PtK0sFlat( Double_t *, Double_t *) | |
158 | { | |
159 | // K0s FLAT pt-distribution | |
160 | return 1; | |
161 | } | |
162 | ||
163 | Double_t AliGenRICHlib::PtK0sExp( Double_t *x, Double_t *) | |
164 | { | |
165 | // K0s EXP pt-distribution | |
166 | return x[0]*TMath::Exp(-x[0]/0.17); | |
167 | } | |
168 | ||
169 | Double_t AliGenRICHlib::YK0sFlat(Double_t *,Double_t *) | |
170 | { | |
171 | // K0s y-distribution | |
172 | return 1; | |
173 | } | |
174 | ||
175 | ||
176 | //--------------------------------------------- | |
177 | // Phi(1020) | |
178 | //--------------------------------------------- | |
d1590034 | 179 | Int_t AliGenRICHlib::IpPhi(TRandom *) |
180 | { | |
181 | //PDG code | |
182 | return 333; | |
183 | } | |
184 | ||
185 | Double_t AliGenRICHlib::PtPhiFlat( Double_t *, Double_t *) | |
186 | { | |
187 | // Phi FLAT pt-distribution | |
188 | return 1; | |
189 | } | |
190 | ||
191 | Double_t AliGenRICHlib::PtPhiExp( Double_t *x, Double_t *) | |
192 | { | |
193 | //phi EXP pt-distribution | |
194 | return x[0]*TMath::Exp(-x[0]/0.17); | |
195 | } | |
196 | ||
197 | Double_t AliGenRICHlib::YPhiFlat(Double_t *,Double_t *) | |
198 | { | |
199 | //phi y-distribution | |
200 | return 1; | |
201 | } | |
202 | ||
926ecde4 | 203 | |
d1590034 | 204 | //------------------------------------------------------- |
926ecde4 | 205 | // PROTON |
d1590034 | 206 | //------------------------------------------------------- |
926ecde4 | 207 | Int_t AliGenRICHlib::IpProton(TRandom *) |
d1590034 | 208 | { |
209 | //PDG code | |
926ecde4 | 210 | return 2122; |
d1590034 | 211 | } |
212 | ||
926ecde4 | 213 | Double_t AliGenRICHlib::PtProtonFlat( Double_t *, Double_t *) |
d1590034 | 214 | { |
926ecde4 | 215 | // ProtonFLAT pt-distribution |
d1590034 | 216 | |
217 | return 1; | |
218 | } | |
219 | ||
926ecde4 | 220 | Double_t AliGenRICHlib::PtProtonExp( Double_t *x, Double_t *) |
d1590034 | 221 | { |
926ecde4 | 222 | //Proton EXP pt-distribution |
d1590034 | 223 | return x[0]*TMath::Exp(-x[0]/0.17); |
224 | } | |
225 | ||
926ecde4 | 226 | Double_t AliGenRICHlib::YProtonFlat(Double_t *,Double_t *) |
d1590034 | 227 | { |
926ecde4 | 228 | //Proton y-distribution |
d1590034 | 229 | return 1; |
230 | } | |
231 | ||
232 | ||
926ecde4 | 233 | //------------------------------------------------------- |
234 | // PROTON-BAR | |
235 | //------------------------------------------------------- | |
236 | Int_t AliGenRICHlib::IpProtonBar(TRandom *) | |
d1590034 | 237 | { |
238 | //PDG code | |
926ecde4 | 239 | return -2122; |
d1590034 | 240 | } |
241 | ||
926ecde4 | 242 | Double_t AliGenRICHlib::PtProtonBarFlat( Double_t *, Double_t *) |
d1590034 | 243 | { |
926ecde4 | 244 | // ProtonBar FLAT pt-distribution |
d1590034 | 245 | |
246 | return 1; | |
247 | } | |
248 | ||
926ecde4 | 249 | Double_t AliGenRICHlib::PtProtonBarExp( Double_t *x, Double_t *) |
d1590034 | 250 | { |
926ecde4 | 251 | //ProtonBar EXP pt-distribution |
d1590034 | 252 | return x[0]*TMath::Exp(-x[0]/0.17); |
253 | } | |
254 | ||
926ecde4 | 255 | Double_t AliGenRICHlib::YProtonBarFlat(Double_t *,Double_t *) |
d1590034 | 256 | { |
926ecde4 | 257 | //ProtonBar y-distribution |
d1590034 | 258 | return 1; |
259 | } | |
260 | ||
261 | ||
926ecde4 | 262 | //------------------------------------------------------- |
263 | // LAMBDA | |
264 | //------------------------------------------------------- | |
265 | Int_t AliGenRICHlib::IpLambda(TRandom *) | |
266 | { | |
267 | //PDG code | |
268 | return 3122; | |
269 | } | |
270 | ||
271 | Double_t AliGenRICHlib::PtLambdaFlat( Double_t *, Double_t *) | |
272 | { | |
273 | // Lambda FLAT pt-distribution | |
d1590034 | 274 | |
926ecde4 | 275 | return 1; |
276 | } | |
d1590034 | 277 | |
926ecde4 | 278 | Double_t AliGenRICHlib::PtLambdaExp( Double_t *x, Double_t *) |
279 | { | |
280 | //Lambda EXP pt-distribution | |
281 | return x[0]*TMath::Exp(-x[0]/0.17); | |
282 | } | |
283 | ||
284 | Double_t AliGenRICHlib::YLambdaFlat(Double_t *,Double_t *) | |
285 | { | |
286 | //Lambda y-distribution | |
287 | return 1; | |
288 | } | |
289 | ||
290 | ||
291 | //------------------------------------------------------- | |
292 | // LAMBDA-BAR | |
293 | //------------------------------------------------------- | |
294 | Int_t AliGenRICHlib::IpLambdaBar(TRandom *) | |
d1590034 | 295 | { |
296 | //PDG code | |
926ecde4 | 297 | return -3122; |
d1590034 | 298 | } |
299 | ||
926ecde4 | 300 | Double_t AliGenRICHlib::PtLambdaBarFlat( Double_t *, Double_t *) |
d1590034 | 301 | { |
926ecde4 | 302 | // LambdaBar FLAT pt-distribution |
303 | ||
d1590034 | 304 | return 1; |
305 | } | |
306 | ||
926ecde4 | 307 | Double_t AliGenRICHlib::PtLambdaBarExp( Double_t *x, Double_t *) |
d1590034 | 308 | { |
926ecde4 | 309 | //LambdaBar EXP pt-distribution |
d1590034 | 310 | return x[0]*TMath::Exp(-x[0]/0.17); |
311 | } | |
312 | ||
926ecde4 | 313 | Double_t AliGenRICHlib::YLambdaBarFlat(Double_t *,Double_t *) |
d1590034 | 314 | { |
926ecde4 | 315 | //LambdaBar y-distribution |
d1590034 | 316 | return 1; |
317 | } | |
318 | ||
319 | ||
320 | ||
321 | ||
926ecde4 | 322 | |
d1590034 | 323 | typedef Double_t (*GenFunc) (Double_t*, Double_t*); |
324 | typedef Int_t (*GenFuncIp) (TRandom *); | |
325 | ||
326 | GenFunc AliGenRICHlib::GetPt(Int_t iPID, const char * sForm) const | |
327 | { | |
328 | // Return pointer to Pt parameterisation | |
329 | AliDebug(1,Form("PID: %i, form: %s",iPID,sForm)); | |
330 | TString type(sForm); | |
331 | ||
332 | switch(iPID) { | |
926ecde4 | 333 | |
334 | case kPiPlus: | |
335 | if (type=="FLAT") return PtPiPlusFlat; | |
336 | else if(type=="EXP") return PtPiPlusExp; | |
337 | else { | |
338 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
339 | } | |
340 | ||
341 | case kPiMinus: | |
342 | if (type=="FLAT") return PtPiMinusFlat; | |
343 | else if(type=="EXP") return PtPiMinusExp; | |
344 | else { | |
345 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
346 | } | |
347 | ||
348 | case kKPlus: | |
349 | if (type=="FLAT") return PtKPlusFlat; | |
350 | else if(type=="EXP") return PtKPlusExp; | |
351 | else { | |
352 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
353 | } | |
354 | ||
355 | case kKMinus: | |
356 | if (type=="FLAT") return PtKMinusFlat; | |
357 | else if(type=="EXP") return PtKMinusExp; | |
358 | else { | |
359 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
360 | } | |
361 | ||
362 | ||
363 | case kK0Short: | |
364 | if (type=="FLAT") return PtK0sFlat; | |
365 | else if(type=="EXP") return PtK0sExp; | |
366 | else { | |
367 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
368 | } | |
369 | ||
370 | ||
d1590034 | 371 | case kPhi: |
372 | if (type=="FLAT") return PtPhiFlat; | |
373 | else if(type=="EXP") return PtPhiExp; | |
374 | else { | |
375 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
376 | } | |
377 | ||
926ecde4 | 378 | case kProton: |
379 | if (type=="FLAT") return PtProtonFlat; | |
380 | else if(type=="EXP") return PtProtonExp; | |
381 | else { | |
382 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
383 | } | |
384 | ||
385 | case kProtonBar: | |
386 | if (type=="FLAT") return PtProtonBarFlat; | |
387 | else if(type=="EXP") return PtProtonBarExp; | |
388 | else { | |
389 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
390 | } | |
391 | ||
d1590034 | 392 | case kLambda0: |
393 | if (type=="FLAT") return PtLambdaFlat; | |
394 | else if(type=="EXP") return PtLambdaExp; | |
395 | else { | |
396 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
397 | } | |
398 | ||
399 | case kLambda0Bar: | |
400 | if (type=="FLAT") return PtLambdaBarFlat; | |
401 | else if(type=="EXP") return PtLambdaBarExp; | |
402 | else { | |
403 | AliFatal(Form("Unknown Pt distribution form: %s",sForm)); return 0; | |
404 | } | |
405 | ||
d1590034 | 406 | default : AliFatal(Form("Unknown particle type: %i",iPID)); return 0; |
407 | }//switch | |
408 | } | |
409 | ||
410 | GenFunc AliGenRICHlib::GetY(Int_t iPID, const char *sForm) const | |
411 | { | |
412 | AliDebug(1,Form("PID: %i, form: %s",iPID,sForm)); | |
413 | ||
414 | switch (iPID) { | |
d1590034 | 415 | |
926ecde4 | 416 | case kPiPlus: return YPiPlusFlat; |
417 | case kPiMinus: return YPiMinusFlat; | |
418 | case kKPlus: return YKPlusFlat; | |
419 | case kKMinus: return YKMinusFlat; | |
420 | case kK0Short: return YK0sFlat; | |
421 | case kPhi: return YPhiFlat; | |
422 | case kProton: return YProtonFlat; | |
423 | case kProtonBar: return YProtonBarFlat; | |
424 | case kLambda0: return YLambdaFlat; | |
425 | case kLambda0Bar: return YLambdaBarFlat; | |
426 | ||
427 | default : AliFatal(Form("Unknown particle type: %i",iPID)); return 0; | |
d1590034 | 428 | |
429 | }//switch | |
430 | } | |
431 | ||
432 | GenFuncIp AliGenRICHlib::GetIp(Int_t iPID, const char *sForm) const | |
433 | { | |
434 | // Return pointer to particle type parameterisation | |
435 | AliDebug(1,Form("PID: %i, form: %s",iPID,sForm)); ////////// | |
926ecde4 | 436 | |
d1590034 | 437 | switch (iPID){ |
926ecde4 | 438 | |
439 | case kPiPlus: return IpPiPlus; | |
440 | case kPiMinus: return IpPiMinus; | |
441 | case kKPlus: return IpKPlus; | |
442 | case kKMinus: return IpKMinus; | |
443 | case kK0Short: return IpK0s; | |
d1590034 | 444 | case kPhi: return IpPhi; |
926ecde4 | 445 | case kProton: return IpProton; |
446 | case kProtonBar: return IpProtonBar; | |
d1590034 | 447 | case kLambda0: return IpLambda; |
448 | case kLambda0Bar: return IpLambdaBar; | |
926ecde4 | 449 | |
d1590034 | 450 | default : AliFatal(Form("Unknown particle type: %i",iPID)) return 0; |
451 | } | |
452 | } | |
453 |