]>
Commit | Line | Data |
---|---|---|
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 | ||
f531a546 | 16 | // $Id$ |
4c039060 | 17 | |
959fbac5 | 18 | /////////////////////////////////////////////////////////////////////////// |
19 | // Class AliTrack | |
20 | // Handling of the attributes of a reconstructed particle track. | |
21 | // | |
22 | // Coding example : | |
23 | // ---------------- | |
24 | // | |
25 | // Float_t a[4]={195.,1.2,-0.04,8.5}; | |
26 | // Ali4Vector pmu; | |
27 | // pmu.SetVector(a,"car"); | |
28 | // AliTrack t1; | |
29 | // t1.Set4Momentum(pmu); | |
30 | // | |
31 | // Float_t b[3]={1.2,-0.04,8.5}; | |
32 | // Ali3Vector p; | |
33 | // p.SetVector(b,"car"); | |
34 | // AliTrack t2; | |
35 | // t2.Set3Momentum(p); | |
36 | // t2.SetCharge(0); | |
37 | // t2.SetMass(1.115); | |
38 | // | |
39 | // t1.Info(); | |
40 | // t2.Info(); | |
41 | // | |
42 | // Float_t pi=acos(-1.); | |
43 | // Float_t thcms=0.2*pi; // decay theta angle in cms | |
44 | // Float_t phicms=pi/4.; // decay theta angle in cms | |
45 | // Float_t m1=0.938; | |
46 | // Float_t m2=0.140; | |
47 | // t2.Decay(m1,m2,thcms,phicms); // Track t2 decay : Lambda -> proton + pion | |
48 | // | |
49 | // t2.List(); | |
50 | // | |
51 | // Int_t ndec=t2.GetNdecay(); | |
52 | // AliTrack* d1=t2.GetDecayTrack(1); // Access to decay track number 1 | |
53 | // AliTrack* d2=t2.GetDecayTrack(2); // Access to decay track number 2 | |
54 | // | |
55 | // AliSignal s1,s2,s3,s4; | |
56 | // | |
57 | // .... // Code (e.g. detector readout) to fill AliSignal data | |
58 | // | |
59 | // AliTrack trec; // Track which will be reconstructed from signals | |
60 | // trec.AddSignal(s1); | |
61 | // trec.AddSignal(s3); | |
62 | // trec.AddSignal(s4); | |
63 | // | |
64 | // Ali3Vector P; | |
65 | // Float_t Q,M; | |
66 | // | |
67 | // ... // Code which accesses signals from trec and reconstructs | |
68 | // 3-momentum P, charge Q, mass M etc... | |
69 | // | |
70 | // trec.Set3Momentum(P); | |
71 | // trec.SetCharge(Q); | |
72 | // trec.SetMass(M); | |
73 | // | |
74 | // Float_t r1[3]={1.6,-3.8,25.7}; | |
75 | // Float_t er1[3]={0.2,0.5,1.8}; | |
76 | // Float_t r2[3]={8.6,23.8,-6.7}; | |
77 | // Float_t er2[3]={0.93,1.78,0.8}; | |
78 | // AliPosition begin,end; | |
79 | // begin.SetPosition(r1,"car"); | |
80 | // begin.SetPositionErrors(er1,"car"); | |
81 | // end.SetPosition(r2,"car"); | |
82 | // end.SetPositionErrors(er2,"car"); | |
83 | // trec.SetBeginPoint(begin); | |
84 | // trec.SetEndPoint(end); | |
85 | // | |
86 | // Note : All quantities are in GeV, GeV/c or GeV/c**2 | |
87 | // | |
88 | //--- Author: Nick van Eijndhoven 10-jul-1997 UU-SAP Utrecht | |
f531a546 | 89 | //- Modified: NvE $Date$ UU-SAP Utrecht |
959fbac5 | 90 | /////////////////////////////////////////////////////////////////////////// |
91 | ||
d88f97cc | 92 | #include "AliTrack.h" |
93 | ||
94 | ClassImp(AliTrack) // Class implementation to enable ROOT I/O | |
95 | ||
96 | AliTrack::AliTrack() | |
97 | { | |
98 | // Default constructor | |
99 | // All variables initialised to 0 | |
100 | fDecays=0; | |
959fbac5 | 101 | fSignals=0; |
f531a546 | 102 | fMasses=0; |
103 | fDmasses=0; | |
104 | fPmasses=0; | |
d88f97cc | 105 | Reset(); |
106 | } | |
107 | /////////////////////////////////////////////////////////////////////////// | |
108 | AliTrack::~AliTrack() | |
109 | { | |
110 | // Destructor to delete memory allocated for decay tracks array | |
111 | if (fDecays) | |
112 | { | |
113 | fDecays->Delete(); | |
114 | delete fDecays; | |
115 | fDecays=0; | |
116 | } | |
959fbac5 | 117 | if (fSignals) |
118 | { | |
119 | fSignals->Clear(); | |
120 | delete fSignals; | |
121 | fSignals=0; | |
122 | } | |
d88f97cc | 123 | } |
124 | /////////////////////////////////////////////////////////////////////////// | |
125 | void AliTrack::Reset() | |
126 | { | |
127 | // Reset all variables to 0 | |
d88f97cc | 128 | fQ=0; |
129 | fNdec=0; | |
959fbac5 | 130 | fNsig=0; |
f531a546 | 131 | fNmasses=0; |
d88f97cc | 132 | Double_t a[4]={0,0,0,0}; |
133 | SetVector(a,"sph"); | |
134 | if (fDecays) | |
135 | { | |
136 | fDecays->Delete(); | |
137 | delete fDecays; | |
138 | fDecays=0; | |
139 | } | |
959fbac5 | 140 | if (fSignals) |
141 | { | |
142 | fSignals->Clear(); | |
143 | delete fSignals; | |
144 | fSignals=0; | |
145 | } | |
146 | Double_t b[3]={0,0,0}; | |
147 | fBegin.SetPosition(b,"sph"); | |
148 | fEnd.SetPosition(b,"sph"); | |
f531a546 | 149 | if (fMasses) |
150 | { | |
151 | delete fMasses; | |
152 | fMasses=0; | |
153 | } | |
154 | if (fDmasses) | |
155 | { | |
156 | delete fDmasses; | |
157 | fDmasses=0; | |
158 | } | |
159 | if (fPmasses) | |
160 | { | |
161 | delete fPmasses; | |
162 | fPmasses=0; | |
163 | } | |
d88f97cc | 164 | } |
165 | /////////////////////////////////////////////////////////////////////////// | |
166 | void AliTrack::Set3Momentum(Ali3Vector& p) | |
167 | { | |
168 | // Set the track parameters according to the 3-momentum p | |
959fbac5 | 169 | Set3Vector(p); |
d88f97cc | 170 | } |
171 | /////////////////////////////////////////////////////////////////////////// | |
172 | void AliTrack::Set4Momentum(Ali4Vector& p) | |
173 | { | |
174 | // Set the track parameters according to the 4-momentum p | |
175 | Double_t E=p.GetScalar(); | |
959fbac5 | 176 | Double_t dE=p.GetResultError(); |
d88f97cc | 177 | Ali3Vector pv=p.Get3Vector(); |
178 | SetVector(E,pv); | |
959fbac5 | 179 | SetScalarError(dE); |
d88f97cc | 180 | } |
181 | /////////////////////////////////////////////////////////////////////////// | |
959fbac5 | 182 | void AliTrack::SetMass(Double_t m,Double_t dm) |
d88f97cc | 183 | { |
184 | // Set the particle mass | |
959fbac5 | 185 | // The default value for the error dm is 0. |
186 | Double_t inv=pow(m,2); | |
187 | Double_t dinv=fabs(2.*m*dm); | |
188 | SetInvariant(inv,dinv); | |
d88f97cc | 189 | } |
190 | /////////////////////////////////////////////////////////////////////////// | |
191 | void AliTrack::SetCharge(Float_t q) | |
192 | { | |
193 | // Set the particle charge | |
194 | fQ=q; | |
195 | } | |
196 | /////////////////////////////////////////////////////////////////////////// | |
197 | void AliTrack::Info(TString f) | |
198 | { | |
199 | // Provide track information within the coordinate frame f | |
959fbac5 | 200 | Double_t m=GetMass(); |
201 | Double_t dm=GetResultError(); | |
202 | cout << " *AliTrack::Info* Mass : " << m | |
203 | << " error : " << dm << " Charge : " << fQ | |
f531a546 | 204 | << " Momentum : " << GetMomentum() << " Nmass hyp. : " << fNmasses |
205 | << " Ntracks : " << fNdec << " Nsignals : " << fNsig << endl; | |
206 | for (Int_t i=0; i<fNmasses; i++) | |
207 | { | |
208 | cout << " Mass hypothesis " << (i+1) << " Mass : " << fMasses->At(i) | |
209 | << " error : " << fDmasses->At(i) << " prob. : " << fPmasses->At(i) | |
210 | << endl; | |
211 | } | |
d88f97cc | 212 | Ali4Vector::Info(f); |
213 | } | |
214 | /////////////////////////////////////////////////////////////////////////// | |
215 | void AliTrack::List(TString f) | |
216 | { | |
217 | // Provide current track and decay level 1 information within coordinate frame f | |
218 | ||
219 | Info(f); // Information of the current track | |
220 | ||
221 | // Decay products of this track | |
222 | AliTrack* td; | |
223 | for (Int_t id=1; id<=fNdec; id++) | |
224 | { | |
225 | td=GetDecayTrack(id); | |
226 | if (td) | |
227 | { | |
228 | cout << " ---Level 1 sec. track no. " << id << endl; | |
d88f97cc | 229 | td->Info(f); |
230 | } | |
231 | else | |
232 | { | |
233 | cout << " *AliTrack::List* Error : No decay track present." << endl; | |
234 | } | |
235 | } | |
236 | } | |
237 | /////////////////////////////////////////////////////////////////////////// | |
238 | void AliTrack::ListAll(TString f) | |
239 | { | |
240 | // Provide complete track and decay information within the coordinate frame f | |
241 | ||
242 | Info(f); // Information of the current track | |
959fbac5 | 243 | cout << " Begin-point :"; fBegin.Info(f); |
244 | cout << " End-point :"; fEnd.Info(f); | |
245 | for (Int_t is=1; is<=GetNsignals(); is++) | |
246 | { | |
247 | ((AliSignal*)GetSignal(is))->Info(f); | |
248 | } | |
d88f97cc | 249 | |
250 | AliTrack* t=this; | |
251 | Dump(t,1,f); // Information of all decay products | |
252 | } | |
253 | ////////////////////////////////////////////////////////////////////////// | |
254 | void AliTrack::Dump(AliTrack* t,Int_t n,TString f) | |
255 | { | |
256 | // Recursively provide the info of all decay levels of this track | |
257 | AliTrack* td; | |
258 | for (Int_t id=1; id<=t->GetNdecay(); id++) | |
259 | { | |
260 | td=t->GetDecayTrack(id); | |
261 | if (td) | |
262 | { | |
263 | cout << " ---Level " << n << " sec. track no. " << id << endl; | |
d88f97cc | 264 | td->Info(f); |
959fbac5 | 265 | for (Int_t is=1; is<=td->GetNsignals(); is++) |
266 | { | |
267 | ((AliSignal*)td->GetSignal(is))->Info(f); | |
268 | } | |
d88f97cc | 269 | |
270 | // Go for next decay level of this decay track recursively | |
271 | Dump(td,n+1,f); | |
272 | } | |
273 | else | |
274 | { | |
275 | cout << " *AliTrack::Dump* Error : No decay track present." << endl; | |
276 | } | |
277 | } | |
278 | } | |
279 | ////////////////////////////////////////////////////////////////////////// | |
280 | Double_t AliTrack::GetMomentum() | |
281 | { | |
959fbac5 | 282 | // Provide the value of the track 3-momentum. |
283 | // The error can be obtained by invoking GetResultError() after | |
284 | // invokation of GetMomentum(). | |
285 | ||
286 | // Ali3Vector p=Get3Vector(); | |
287 | // return sqrt(p.Dot(p)); | |
288 | Double_t norm=fV.GetNorm(); | |
289 | return norm; | |
d88f97cc | 290 | } |
291 | /////////////////////////////////////////////////////////////////////////// | |
292 | Ali3Vector AliTrack::Get3Momentum() | |
293 | { | |
294 | // Provide the track 3-momentum | |
295 | return (Ali3Vector)Get3Vector(); | |
296 | } | |
297 | /////////////////////////////////////////////////////////////////////////// | |
298 | Double_t AliTrack::GetMass() | |
299 | { | |
959fbac5 | 300 | // Provide the particle mass. |
301 | // The error can be obtained by invoking GetResultError() after | |
302 | // invokation of GetMass(). | |
303 | Double_t inv=GetInvariant(); | |
304 | Double_t dinv=GetResultError(); | |
305 | Double_t dm=0; | |
306 | if (inv >= 0) | |
307 | { | |
308 | Double_t m=sqrt(inv); | |
309 | if (m) dm=dinv/(2.*m); | |
310 | fDresult=dm; | |
311 | return m; | |
312 | } | |
313 | else | |
314 | { | |
315 | cout << "*AliTrack::GetMass* Unphysical situation m**2 = " << inv << endl; | |
316 | cout << " Value 0 will be returned." << endl; | |
317 | fDresult=dm; | |
318 | return 0; | |
319 | } | |
d88f97cc | 320 | } |
321 | /////////////////////////////////////////////////////////////////////////// | |
322 | Float_t AliTrack::GetCharge() | |
323 | { | |
324 | // Provide the particle charge | |
325 | return fQ; | |
326 | } | |
327 | /////////////////////////////////////////////////////////////////////////// | |
328 | Double_t AliTrack::GetEnergy() | |
329 | { | |
959fbac5 | 330 | // Provide the particle's energy. |
331 | // The error can be obtained by invoking GetResultError() after | |
332 | // invokation of GetEnergy(). | |
333 | Double_t E=GetScalar(); | |
334 | if (E>0) | |
335 | { | |
336 | return E; | |
337 | } | |
338 | else | |
339 | { | |
340 | cout << "*AliTrack::GetEnergy* Unphysical situation E = " << E << endl; | |
341 | cout << " Value 0 will be returned." << endl; | |
342 | return 0; | |
343 | } | |
d88f97cc | 344 | } |
345 | /////////////////////////////////////////////////////////////////////////// | |
346 | void AliTrack::Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms) | |
347 | { | |
348 | // Perform 2-body decay of current track | |
349 | // m1 : mass of decay product 1 | |
350 | // m2 : mass of decay product 2 | |
351 | // thcms : cms theta decay angle (in rad.) of m1 | |
352 | // phicms : cms phi decay angle (in rad.) of m1 | |
353 | ||
354 | fNdec=2; // it's a 2-body decay | |
959fbac5 | 355 | |
356 | Double_t M=GetMass(); | |
d88f97cc | 357 | |
358 | // Compute the 4-momenta of the decay products in the cms | |
359 | // Note : p2=p1=pnorm for a 2-body decay | |
959fbac5 | 360 | Double_t e1=0; |
361 | if (M) e1=((M*M)+(m1*m1)-(m2*m2))/(2.*M); | |
362 | Double_t e2=0; | |
363 | if (M) e2=((M*M)+(m2*m2)-(m1*m1))/(2.*M); | |
d88f97cc | 364 | Double_t pnorm=(e1*e1)-(m1*m1); |
365 | if (pnorm>0.) | |
366 | { | |
367 | pnorm=sqrt(pnorm); | |
368 | } | |
369 | else | |
370 | { | |
371 | pnorm=0; | |
372 | } | |
373 | ||
374 | Double_t a[3]; | |
375 | a[0]=pnorm; | |
376 | a[1]=thcms; | |
377 | a[2]=phicms; | |
378 | Ali3Vector p; | |
379 | p.SetVector(a,"sph"); | |
380 | ||
381 | Ali4Vector pprim1; | |
382 | pprim1.SetVector(e1,p); | |
959fbac5 | 383 | pprim1.SetInvariant(m1*m1); |
d88f97cc | 384 | |
385 | Ali4Vector pprim2; | |
386 | p*=-1; | |
387 | pprim2.SetVector(e2,p); | |
959fbac5 | 388 | pprim2.SetInvariant(m2*m2); |
d88f97cc | 389 | |
390 | // Determine boost parameters from the parent particle | |
959fbac5 | 391 | Double_t E=GetEnergy(); |
d88f97cc | 392 | p=Get3Vector(); |
393 | Ali4Vector pmu; | |
394 | pmu.SetVector(E,p); | |
395 | ||
396 | AliBoost q; | |
397 | q.Set4Momentum(pmu); | |
398 | ||
399 | Ali4Vector p1=q.Inverse(pprim1); // Boost decay product 1 | |
400 | Ali4Vector p2=q.Inverse(pprim2); // Boost decay product 2 | |
401 | ||
402 | // Enter the boosted data into the decay tracks array | |
403 | if (fDecays) | |
404 | { | |
405 | fDecays->Delete(); | |
406 | delete fDecays; | |
407 | } | |
408 | fDecays=new TObjArray(); | |
409 | ||
410 | fDecays->Add(new AliTrack); | |
411 | ((AliTrack*)fDecays->At(0))->Set4Momentum(p1); | |
959fbac5 | 412 | ((AliTrack*)fDecays->At(0))->SetMass(m1); |
d88f97cc | 413 | fDecays->Add(new AliTrack); |
414 | ((AliTrack*)fDecays->At(1))->Set4Momentum(p2); | |
d88f97cc | 415 | ((AliTrack*)fDecays->At(1))->SetMass(m2); |
416 | } | |
417 | /////////////////////////////////////////////////////////////////////////// | |
418 | Int_t AliTrack::GetNdecay() | |
419 | { | |
420 | // Provide the number of decay produced tracks | |
421 | return fNdec; | |
422 | } | |
423 | /////////////////////////////////////////////////////////////////////////// | |
424 | AliTrack* AliTrack::GetDecayTrack(Int_t j) | |
425 | { | |
426 | // Provide decay produced track number j | |
427 | // Note : j=1 denotes the first decay track | |
428 | if ((j >= 1) && (j <= fNdec)) | |
429 | { | |
430 | return (AliTrack*)fDecays->At(j-1); | |
431 | } | |
432 | else | |
433 | { | |
434 | cout << " *AliTrack* decay track number : " << j << " out of range." << endl; | |
435 | cout << " -- Decay track number 1 (if any) returned." << endl; | |
436 | return (AliTrack*)fDecays->At(0); | |
437 | } | |
438 | } | |
439 | /////////////////////////////////////////////////////////////////////////// | |
959fbac5 | 440 | void AliTrack::AddSignal(AliSignal& s) |
441 | { | |
442 | // Relate an AliSignal object to this track. | |
443 | if (!fSignals) fSignals=new TObjArray(); | |
444 | fNsig++; | |
445 | fSignals->Add(&s); | |
446 | } | |
447 | /////////////////////////////////////////////////////////////////////////// | |
448 | void AliTrack::RemoveSignal(AliSignal& s) | |
449 | { | |
450 | // Remove related AliSignal object to this track. | |
451 | if (fSignals) | |
452 | { | |
453 | AliSignal* test=(AliSignal*)fSignals->Remove(&s); | |
454 | if (test) | |
455 | { | |
456 | fNsig--; | |
457 | fSignals->Compress(); | |
458 | } | |
459 | } | |
460 | } | |
461 | /////////////////////////////////////////////////////////////////////////// | |
462 | Int_t AliTrack::GetNsignals() | |
463 | { | |
464 | // Provide the number of related AliSignals. | |
465 | return fNsig; | |
466 | } | |
467 | /////////////////////////////////////////////////////////////////////////// | |
468 | AliSignal* AliTrack::GetSignal(Int_t j) | |
469 | { | |
470 | // Provide the related AliSignal number j. | |
471 | // Note : j=1 denotes the first signal. | |
472 | if ((j >= 1) && (j <= fNsig)) | |
473 | { | |
474 | return (AliSignal*)fSignals->At(j-1); | |
475 | } | |
476 | else | |
477 | { | |
478 | cout << " *AliTrack* signal number : " << j << " out of range." << endl; | |
479 | cout << " -- Signal number 1 (if any) returned." << endl; | |
480 | return (AliSignal*)fDecays->At(0); | |
481 | } | |
482 | } | |
483 | /////////////////////////////////////////////////////////////////////////// | |
484 | void AliTrack::SetBeginPoint(AliPosition p) | |
485 | { | |
486 | // Store the position of the track begin-point. | |
487 | fBegin=p; | |
488 | } | |
489 | /////////////////////////////////////////////////////////////////////////// | |
490 | AliPosition AliTrack::GetBeginPoint() | |
491 | { | |
492 | // Provide the position of the track begin-point. | |
493 | return fBegin; | |
494 | } | |
495 | /////////////////////////////////////////////////////////////////////////// | |
496 | void AliTrack::SetEndPoint(AliPosition p) | |
497 | { | |
498 | // Store the position of the track end-point. | |
499 | fEnd=p; | |
500 | } | |
501 | /////////////////////////////////////////////////////////////////////////// | |
502 | AliPosition AliTrack::GetEndPoint() | |
503 | { | |
504 | // Provide the position of the track end-point. | |
505 | return fEnd; | |
506 | } | |
507 | /////////////////////////////////////////////////////////////////////////// | |
f531a546 | 508 | void AliTrack::AddMassHypothesis(Double_t prob,Double_t m,Double_t dm) |
509 | { | |
510 | // Add a mass hypothesis for this current track. | |
511 | // prob=probalility m=mass value dm=error on the mass value. | |
512 | // The default value for the mass error dm is 0. | |
513 | if (!fMasses) fMasses=new TArrayD(); | |
514 | if (!fDmasses) fDmasses=new TArrayD(); | |
515 | if (!fPmasses) fPmasses=new TArrayD(); | |
516 | ||
517 | fNmasses++; | |
518 | fMasses->Set(fNmasses); | |
519 | fDmasses->Set(fNmasses); | |
520 | fPmasses->Set(fNmasses); | |
521 | ||
522 | fMasses->AddAt(m,fNmasses-1); | |
523 | fDmasses->AddAt(dm,fNmasses-1); | |
524 | fPmasses->AddAt(prob,fNmasses-1); | |
525 | } | |
526 | /////////////////////////////////////////////////////////////////////////// | |
527 | Int_t AliTrack::GetNMassHypotheses() | |
528 | { | |
529 | // Provide the number of mass hypotheses for this track. | |
530 | return fNmasses; | |
531 | } | |
532 | /////////////////////////////////////////////////////////////////////////// | |
533 | Double_t AliTrack::GetMassHypothesis(Int_t j) | |
534 | { | |
535 | // Provide the mass of the jth hypothesis for this track. | |
536 | // Note : the first hypothesis is indicated by j=1. | |
537 | // Default : j=0 ==> Hypothesis with highest probability. | |
538 | // The error on the mass can be obtained by invoking GetResultError() | |
539 | // after invokation of GetMassHypothesis(j). | |
540 | ||
541 | Double_t m=0,dm=0,prob=0; | |
542 | ||
543 | // Check validity of index j | |
544 | if (j<0 || j>fNmasses) | |
545 | { | |
546 | cout << " *AliTrack::GetMassHypothesis* Invalid index j : " << j | |
547 | << " Number of mass hypotheses : " << fNmasses << endl; | |
548 | fDresult=0; | |
549 | return 0; | |
550 | } | |
551 | ||
552 | // Select mass hypothesis with highest probability | |
553 | if (j==0) | |
554 | { | |
555 | if (fNmasses) | |
556 | { | |
557 | m=fMasses->At(0); | |
558 | dm=fDmasses->At(0); | |
559 | prob=fPmasses->At(0); | |
560 | for (Int_t i=1; i<fNmasses; i++) | |
561 | { | |
562 | if (fPmasses->At(i)>prob) | |
563 | { | |
564 | m=fMasses->At(i); | |
565 | dm=fDmasses->At(i); | |
566 | } | |
567 | } | |
568 | } | |
569 | fDresult=dm; | |
570 | return m; | |
571 | } | |
572 | ||
573 | // Provide data of requested mass hypothesis | |
574 | m=fMasses->At(j-1); | |
575 | fDresult=fDmasses->At(j-1); | |
576 | return m; | |
577 | } | |
578 | /////////////////////////////////////////////////////////////////////////// | |
579 | Double_t AliTrack::GetMassHypothesisProb(Int_t j) | |
580 | { | |
581 | // Provide the probability of the jth hypothesis for this track. | |
582 | // Note : the first hypothesis is indicated by j=1. | |
583 | // Default : j=0 ==> Hypothesis with highest probability. | |
584 | ||
585 | Double_t prob=0; | |
586 | ||
587 | // Check validity of index j | |
588 | if (j<0 || j>fNmasses) | |
589 | { | |
590 | cout << " *AliTrack::GetMassHypothesisProb* Invalid index j : " << j | |
591 | << " Number of mass hypotheses : " << fNmasses << endl; | |
592 | return 0; | |
593 | } | |
594 | ||
595 | // Select mass hypothesis with highest probability | |
596 | if (j==0) | |
597 | { | |
598 | if (fNmasses) | |
599 | { | |
600 | prob=fPmasses->At(0); | |
601 | for (Int_t i=1; i<fNmasses; i++) | |
602 | { | |
603 | if (fPmasses->At(i)>prob) prob=fPmasses->At(i); | |
604 | } | |
605 | } | |
606 | return prob; | |
607 | } | |
608 | ||
609 | // Provide probability of requested mass hypothesis | |
610 | prob=fPmasses->At(j-1); | |
611 | return prob; | |
612 | } | |
613 | /////////////////////////////////////////////////////////////////////////// | |
614 | void AliTrack::SetMass() | |
615 | { | |
616 | // Set the mass and error to the value of the hypothesis with highest prob. | |
617 | ||
618 | Double_t m=0,dm=0,prob=0; | |
619 | ||
620 | // Select mass hypothesis with highest probability | |
621 | if (fNmasses) | |
622 | { | |
623 | m=fMasses->At(0); | |
624 | dm=fDmasses->At(0); | |
625 | prob=fPmasses->At(0); | |
626 | for (Int_t i=1; i<fNmasses; i++) | |
627 | { | |
628 | if (fPmasses->At(i)>prob) | |
629 | { | |
630 | m=fMasses->At(i); | |
631 | dm=fDmasses->At(i); | |
632 | } | |
633 | } | |
634 | SetMass(m,dm); | |
635 | } | |
636 | else | |
637 | { | |
638 | cout << " *AliTrack::SetMass()* No hypothesis present => No action." << endl; | |
639 | } | |
640 | } | |
641 | /////////////////////////////////////////////////////////////////////////// | |
642 | void AliTrack::RemoveMassHypothesis(Int_t j) | |
643 | { | |
644 | // Remove the jth mass hypothesis for this track. | |
645 | // Note : the first hypothesis is indicated by j=1. | |
646 | ||
647 | if (j<=0 || j>fNmasses) // Check validity of index j | |
648 | { | |
649 | cout << " *AliTrack::RemoveMassHypothesis* Invalid index j : " << j | |
650 | << " Number of mass hypotheses : " << fNmasses << endl; | |
651 | } | |
652 | else | |
653 | { | |
654 | if (j != fNmasses) | |
655 | { | |
656 | fMasses->AddAt(fMasses->At(fNmasses-1),j-1); | |
657 | fDmasses->AddAt(fDmasses->At(fNmasses-1),j-1); | |
658 | fPmasses->AddAt(fPmasses->At(fNmasses-1),j-1); | |
659 | } | |
660 | fMasses->AddAt(0,fNmasses-1); | |
661 | fDmasses->AddAt(0,fNmasses-1); | |
662 | fPmasses->AddAt(0,fNmasses-1); | |
663 | fNmasses--; | |
664 | fMasses->Set(fNmasses); | |
665 | fDmasses->Set(fNmasses); | |
666 | fPmasses->Set(fNmasses); | |
667 | } | |
668 | } | |
669 | /////////////////////////////////////////////////////////////////////////// |