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7f92929e | 1 | #include "AliHBTLLWeights.h" |
2 | #include "AliPDG.h" | |
3 | #include "AliHBTPair.h" | |
4 | #include "AliHBTParticle.h" | |
5 | #include <TList.h> | |
6 | #include <TRandom.h> | |
7 | #include <TMath.h> | |
8 | ||
9 | /*******************************************************************/ | |
10 | /****** ROUTINES USED FOR COMMUNUCATION ********/ | |
11 | /******************** WITH FORTRAN ********************/ | |
12 | /*******************************************************************/ | |
13 | #ifndef WIN32 | |
14 | # define led_bldata led_bldata_ | |
15 | # define fsiini fsiini_ | |
16 | # define ltran12 ltran12_ | |
17 | # define fsiw fsiw_ | |
18 | # define type_of_call | |
19 | #else | |
20 | # define led_bldata LED_BLDATA | |
21 | # define fsiini FSIINI | |
22 | # define ltran12 LTRAN12 | |
23 | # define fsiw FSIW | |
24 | # define type_of_call _stdcall | |
25 | #endif | |
26 | /****************************************************************/ | |
27 | extern "C" void type_of_call led_bldata(); | |
28 | extern "C" void type_of_call fsiini(); | |
29 | extern "C" void type_of_call ltran12(); | |
30 | extern "C" void type_of_call fsiw(); | |
31 | /**************************************************************/ | |
32 | ||
33 | ClassImp(AliHBTLLWeights) | |
7f92929e | 34 | |
35 | AliHBTLLWeights* AliHBTLLWeights::fgLLWeights=NULL; | |
36 | ||
37 | AliHBTLLWeights::AliHBTLLWeights() | |
38 | { | |
39 | // Default Constructor | |
40 | fPID1 = 0; | |
41 | fPID2 = 0; | |
42 | SetRandomPosition(); | |
43 | SetColWithResidNuclSwitch(); | |
44 | SetStrongInterSwitch(); | |
45 | SetQuantumStatistics(); | |
46 | SetColoumb(); | |
47 | SetTest(); | |
2f8eea63 | 48 | |
7f92929e | 49 | } |
50 | ||
51 | ||
52 | AliHBTLLWeights* AliHBTLLWeights::Instance() | |
53 | { | |
2f8eea63 | 54 | if (fgLLWeights) { |
55 | return fgLLWeights; | |
56 | } else { | |
57 | fgLLWeights = new AliHBTLLWeights(); | |
58 | return fgLLWeights; | |
7f92929e | 59 | } |
60 | } | |
61 | ||
62 | ||
63 | Double_t AliHBTLLWeights::GetWeight(const AliHBTPair* partpair) | |
64 | { | |
65 | AliHBTParticle *part1 = partpair->Particle1(); | |
66 | AliHBTParticle *part2 = partpair->Particle2(); | |
2f8eea63 | 67 | |
7f92929e | 68 | if ( (part1 == 0x0) || (part2 == 0x0)) |
2f8eea63 | 69 | { |
7f92929e | 70 | Error("GetWeight","Null particle pointer"); |
71 | return 0.0; | |
2f8eea63 | 72 | } |
73 | ||
7f92929e | 74 | |
75 | Double_t part1Momentum[]={part1->Px(),part1->Py(),part1->Pz()}; | |
76 | Double_t part2Momentum[]={part2->Px(),part2->Py(),part2->Pz()}; | |
77 | ||
2f8eea63 | 78 | if ( (part1->Px() == part2->Px()) && |
79 | (part1->Py() == part2->Py()) && | |
80 | (part1->Pz() == part2->Pz()) ) | |
81 | { | |
82 | return 0.0; | |
83 | } | |
7f92929e | 84 | |
85 | ||
2f8eea63 | 86 | if ((!fRandomPosition) && |
87 | (part1->Vx() == part2->Vx()) && (part1->Vy() == part2->Vy()) | |
88 | && (part1->Vz() == part2->Vz()) ) | |
89 | { | |
90 | return 0.0; | |
91 | } | |
7f92929e | 92 | |
7f92929e | 93 | |
2f8eea63 | 94 | |
95 | FSI_MOM.P1X=part1Momentum[0]; | |
96 | FSI_MOM.P1Y=part1Momentum[1]; | |
97 | FSI_MOM.P1Z=part1Momentum[2]; | |
7f92929e | 98 | |
2f8eea63 | 99 | FSI_MOM.P2X=part2Momentum[0]; |
100 | FSI_MOM.P2Y=part2Momentum[1]; | |
101 | FSI_MOM.P2Z=part2Momentum[2]; | |
102 | ||
103 | if (fRandomPosition){ | |
104 | ||
105 | Double_t rxcm = fsigma*gRandom->Gaus(); | |
106 | Double_t rycm = fsigma*gRandom->Gaus(); | |
107 | Double_t rzcm = fsigma*gRandom->Gaus(); | |
7f92929e | 108 | |
2f8eea63 | 109 | FSI_PRF.X=rxcm*fwcons; |
110 | FSI_PRF.Y=rycm*fwcons; | |
111 | FSI_PRF.Z=rzcm*fwcons; | |
112 | FSI_PRF.T=0.; | |
113 | ||
114 | Double_t rps=rxcm*rxcm+rycm*rycm+rzcm*rzcm; | |
115 | Double_t rp=TMath::Sqrt(rps); | |
116 | FSI_PRF.RP=rp; | |
117 | FSI_PRF.RPS=rps; | |
118 | ||
119 | } | |
120 | ||
121 | ltran12(); | |
122 | fsiw(); | |
123 | ||
124 | return LEDWEIGHT.WEIN; | |
125 | ||
7f92929e | 126 | } |
127 | ||
128 | /************************************************************/ | |
129 | void AliHBTLLWeights::Init() | |
130 | { | |
131 | //--------------------------------------------------------------------- | |
132 | ||
133 | //initial parameters of model | |
134 | ||
2f8eea63 | 135 | FSI_NS.NS = approximationModel; |
136 | ||
137 | if(!ftest){LEDWEIGHT.ITEST=0;} | |
7f92929e | 138 | |
2f8eea63 | 139 | if(ftest){ |
140 | LEDWEIGHT.ITEST=1; | |
141 | if(fColoumbSwitch){FSI_NS.ICH =1;} | |
142 | else{FSI_NS.ICH=0;} | |
143 | if(fStrongInterSwitch){FSI_NS.ISI=1;} | |
144 | else{FSI_NS.ISI=0;} | |
145 | if(fQuantStatSwitch){FSI_NS.IQS=1;} | |
146 | else{FSI_NS.IQS=0;} | |
147 | if(fColWithResidNuclSwitch){FSI_NS.I3C=1;} | |
148 | else{FSI_NS.I3C=0;} | |
149 | } | |
150 | ||
151 | if(fRandomPosition){LEDWEIGHT.IRANPOS=1;} | |
152 | else{LEDWEIGHT.IRANPOS=0;} | |
7f92929e | 153 | |
7f92929e | 154 | |
2f8eea63 | 155 | if ( (fPID1 == 0) || (fPID2 == 0) ) |
156 | { | |
157 | Fatal("Init","Particles types are not set"); | |
158 | return;//pro forma | |
159 | } | |
7f92929e | 160 | |
2f8eea63 | 161 | FSI_NS.LL = GetPairCode(fPID1,fPID2); |
162 | ||
163 | if (FSI_NS.LL == 0) | |
164 | { | |
165 | Fatal("Init","Particles types are not supported"); | |
166 | return;//pro forma | |
167 | } | |
7f92929e | 168 | |
7f92929e | 169 | |
2f8eea63 | 170 | TParticlePDG* tpart1 = TDatabasePDG::Instance()->GetParticle(fPID1); |
171 | if (tpart1 == 0x0) | |
172 | { | |
173 | Fatal("init","We can not find particle with ID=%d in our DataBase",fPID1); | |
174 | return; | |
175 | } | |
176 | ||
177 | FSI_POC.AM1=tpart1->Mass(); | |
178 | FSI_POC.C1=tpart1->Charge(); | |
179 | ||
180 | TParticlePDG* tpart2 = TDatabasePDG::Instance()->GetParticle(fPID2); | |
181 | //mlv | |
182 | ||
183 | ||
184 | ||
185 | if (tpart2 == 0x0) | |
186 | { | |
187 | Fatal("init","We can not find particle with ID=%d in our DataBase",fPID2); | |
188 | return; | |
189 | } | |
190 | ||
191 | FSI_POC.AM2=tpart2->Mass(); | |
192 | FSI_POC.C1=tpart2->Charge(); | |
7f92929e | 193 | |
2f8eea63 | 194 | led_bldata(); |
195 | fsiini(); | |
7f92929e | 196 | |
197 | ||
198 | //constants for radii simulation | |
199 | ||
2f8eea63 | 200 | if(fRandomPosition){ |
201 | fsigma =TMath::Sqrt(2.)*fRadius; | |
202 | fwcons =FSI_CONS.W; | |
203 | } | |
7f92929e | 204 | } |
205 | ||
206 | Int_t AliHBTLLWeights::GetPairCode(const AliHBTPair* partpair) | |
207 | { | |
208 | return GetPairCode(partpair->Particle1()->GetPdgCode(),partpair->Particle2()->GetPdgCode()); | |
209 | } | |
210 | ||
211 | Int_t AliHBTLLWeights::GetPairCode(Int_t pid1,Int_t pid2) | |
212 | { | |
213 | // pairCode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | |
214 | // hpid: n p n alfa pi+ pi0 pi+ n p pi+ pi+ pi+ pi- K+ K+ K+ K- d d t t K0 K0 d p p p n | |
215 | // lpid: n p p alfa pi- pi0 pi+ d d K- K+ p p K- K+ p p d alfa t alfa K0 K0b t t alfa lambda lambda | |
216 | // NS=1 y/n: + + + + + - - - - - - - - - - - - - - - - - - - - - - - | |
217 | ||
218 | //alphas, deuterons and tyts are NOT supported here | |
219 | ||
220 | Int_t chargefactor = 1; | |
221 | Int_t hpid; //pid in higher row | |
222 | Int_t lpid; //pid in lower row | |
223 | Int_t code; //pairCode | |
224 | ||
225 | Bool_t swap; | |
226 | ||
227 | //determine the order of selcetion in switch | |
228 | if (TMath::Abs(pid1) < TMath::Abs(pid2) ) | |
229 | { | |
230 | if (pid1<0) chargefactor=-1; | |
231 | hpid=pid2*chargefactor; | |
232 | lpid=pid1*chargefactor; | |
233 | swap = kFALSE; | |
234 | } | |
235 | else | |
236 | { | |
237 | if (pid2<0) chargefactor=-1; | |
238 | hpid=pid1*chargefactor; | |
239 | lpid=pid2*chargefactor; | |
240 | swap = kTRUE; | |
241 | } | |
242 | ||
2f8eea63 | 243 | //mlv |
244 | hpid=pid1; | |
245 | lpid=pid2; | |
246 | ||
247 | ||
7f92929e | 248 | //Determine the pair code |
249 | switch (hpid) //switch on first particle id | |
250 | { | |
251 | case kNeutron: | |
252 | switch (lpid) | |
253 | { | |
254 | case kNeutron: | |
255 | code = 1; //neutron neutron | |
256 | break; | |
257 | ||
258 | case kProton: | |
259 | code = 3; //neutron proton | |
260 | break; | |
261 | ||
262 | case kLambda0: | |
263 | code = 28; //neutron lambda | |
264 | break; | |
265 | ||
266 | default: | |
267 | return 0; //given pair not supported | |
268 | break; | |
269 | } | |
270 | break; | |
271 | ||
272 | case kProton: | |
273 | switch (lpid) | |
274 | { | |
275 | case kProton: | |
276 | code = 2; //proton proton | |
277 | break; | |
278 | ||
279 | case kLambda0: | |
280 | code = 27;//proton lambda | |
281 | break; | |
282 | ||
283 | default: | |
284 | return 0; //given pair not supported | |
285 | break; | |
286 | ||
287 | } | |
288 | break; | |
289 | ||
290 | case kPiPlus: | |
2f8eea63 | 291 | |
7f92929e | 292 | switch (lpid) |
293 | { | |
294 | case kPiPlus: | |
295 | code = 7; //piplus piplus | |
296 | break; | |
297 | ||
298 | case kPiMinus: | |
299 | code = 5; //piplus piminus | |
300 | break; | |
301 | ||
302 | case kKMinus: | |
303 | code = 10; //piplus Kminus | |
304 | break; | |
305 | ||
306 | case kKPlus: | |
307 | code = 11; //piplus Kplus | |
308 | break; | |
309 | ||
310 | case kProton: | |
311 | code = 12; //piplus proton | |
312 | chargefactor*=-1; | |
313 | break; | |
314 | ||
315 | default: | |
316 | return 0; //given pair not supported | |
317 | break; | |
318 | } | |
319 | break; | |
320 | case kPi0: | |
321 | switch (lpid) | |
322 | { | |
323 | case kPi0: | |
324 | code = 6; | |
325 | break; | |
326 | ||
327 | default: | |
328 | return 0; //given pair not supported | |
329 | break; | |
330 | } | |
331 | break; | |
332 | ||
333 | case kKPlus: | |
334 | switch (lpid) | |
335 | { | |
336 | case kKMinus: | |
337 | code = 14; //Kplus Kminus | |
338 | break; | |
339 | ||
340 | case kKPlus: | |
341 | code = 15; //Kplus Kplus | |
342 | break; | |
343 | ||
344 | case kProton: | |
345 | code = 16; //Kplus proton | |
346 | break; | |
347 | ||
348 | default: | |
349 | return 0; //given pair not supported | |
350 | break; | |
351 | } | |
352 | break; | |
353 | ||
354 | case kKMinus: | |
355 | switch (lpid) | |
356 | { | |
357 | case kProton: | |
358 | code = 17; //Kminus proton | |
359 | chargefactor*=1; | |
360 | break; | |
361 | ||
362 | default: | |
363 | return 0; //given pair not supported | |
364 | break; | |
365 | } | |
366 | break; | |
367 | ||
368 | case kK0: | |
369 | switch (lpid) | |
370 | { | |
371 | case kK0: | |
372 | code = 2; //Kzero Kzero | |
373 | break; | |
374 | ||
375 | case kK0Bar: | |
376 | code = 17; //Kzero KzeroBar | |
377 | break; | |
378 | ||
379 | default: | |
380 | return 0; //given pair not supported | |
381 | break; | |
382 | } | |
383 | break; | |
384 | ||
385 | default: return 0; | |
386 | } | |
387 | return code; | |
388 | } | |
389 |