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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 | ||
16 | /* $Id$ */ | |
17 | ||
18 | //----------------------------------------------------------------- | |
19 | // Implementation of the combined PID class | |
20 | // For the Event Summary Data Class | |
21 | // produced by the reconstruction process | |
22 | // and containing information on the particle identification | |
23 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
24 | //----------------------------------------------------------------- | |
25 | ||
26 | #include "AliESDpid.h" | |
27 | #include "AliESD.h" | |
28 | #include "AliESDtrack.h" | |
29 | ||
30 | ClassImp(AliESDpid) | |
31 | ||
32 | //_________________________________________________________________________ | |
33 | Int_t AliESDpid::MakePID(AliESD *event) | |
34 | { | |
35 | // | |
36 | // Combine the information of various detectors | |
37 | // to determine the Particle Identification | |
38 | // | |
39 | Int_t ntrk=event->GetNumberOfTracks(); | |
40 | for (Int_t i=0; i<ntrk; i++) { | |
41 | Int_t ns=AliESDtrack::kSPECIES; | |
42 | Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.}; | |
43 | const Double_t keps=1e-13; | |
44 | ||
45 | AliESDtrack *t=event->GetTrack(i); | |
46 | ||
47 | if ((t->GetStatus()&AliESDtrack::kITSpid )!=0) { | |
48 | Double_t d[10]; | |
49 | t->GetITSpid(d); | |
50 | Int_t j, ok=0; | |
51 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
52 | if (ok) | |
53 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
54 | } | |
55 | ||
56 | if ((t->GetStatus()&AliESDtrack::kTPCpid )!=0) { | |
57 | Double_t d[10]; | |
58 | t->GetTPCpid(d); | |
59 | Int_t j, ok=0; | |
60 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
61 | if (ok) | |
62 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
63 | } | |
64 | ||
65 | if ((t->GetStatus()&AliESDtrack::kTRDpid )!=0) { | |
66 | Double_t d[10]; | |
67 | t->GetTRDpid(d); | |
68 | Int_t j, ok=0; | |
69 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
70 | if (ok) | |
71 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
72 | } | |
73 | ||
74 | if (t->GetP()>0.7) // accept the TOF only for the high momenta | |
75 | if ((t->GetStatus()&AliESDtrack::kTOFpid )!=0) { | |
76 | Double_t d[10]; | |
77 | t->GetTOFpid(d); | |
78 | Int_t j, ok=0; | |
79 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
80 | if (ok) | |
81 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
82 | } | |
83 | ||
84 | if ((t->GetStatus()&AliESDtrack::kPHOSpid )!=0) { | |
85 | Double_t d[10]; | |
86 | t->GetPHOSpid(d); | |
87 | Int_t j, ok=0; | |
88 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
89 | if (ok) | |
90 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
91 | } | |
92 | ||
93 | if ((t->GetStatus()&AliESDtrack::kRICHpid )!=0) { | |
94 | Double_t d[10]; | |
95 | t->GetRICHpid(d); | |
96 | Int_t j, ok=0; | |
97 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; | |
98 | if (ok) | |
99 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
100 | } | |
101 | ||
102 | t->SetESDpid(p); | |
103 | } | |
104 | return 0; | |
105 | } |