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8c6a71ab | 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 | ||
4f679a16 | 16 | /* $Id$ */ |
17 | ||
8c6a71ab | 18 | //----------------------------------------------------------------- |
19 | // Implementation of the combined PID class | |
4f679a16 | 20 | // For the Event Summary Data Class |
21 | // produced by the reconstruction process | |
22 | // and containing information on the particle identification | |
8c6a71ab | 23 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch |
24 | //----------------------------------------------------------------- | |
25 | ||
26 | #include "AliESDpid.h" | |
af885e0f | 27 | #include "AliESDEvent.h" |
8c6a71ab | 28 | #include "AliESDtrack.h" |
29 | ||
30 | ClassImp(AliESDpid) | |
31 | ||
32 | //_________________________________________________________________________ | |
af885e0f | 33 | Int_t AliESDpid::MakePID(AliESDEvent *event) |
8c6a71ab | 34 | { |
4f679a16 | 35 | // |
36 | // Combine the information of various detectors | |
37 | // to determine the Particle Identification | |
38 | // | |
8c6a71ab | 39 | Int_t ntrk=event->GetNumberOfTracks(); |
40 | for (Int_t i=0; i<ntrk; i++) { | |
304864ab | 41 | Int_t ns=AliPID::kSPECIES; |
8c6a71ab | 42 | Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.}; |
4f679a16 | 43 | const Double_t keps=1e-13; |
8c6a71ab | 44 | |
45 | AliESDtrack *t=event->GetTrack(i); | |
46 | ||
47 | if ((t->GetStatus()&AliESDtrack::kITSpid )!=0) { | |
48 | Double_t d[10]; | |
49 | t->GetITSpid(d); | |
4a78b8c5 | 50 | Int_t j, ok=0; |
4f679a16 | 51 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; |
4a78b8c5 | 52 | if (ok) |
53 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
8c6a71ab | 54 | } |
55 | ||
56 | if ((t->GetStatus()&AliESDtrack::kTPCpid )!=0) { | |
57 | Double_t d[10]; | |
58 | t->GetTPCpid(d); | |
4a78b8c5 | 59 | Int_t j, ok=0; |
4f679a16 | 60 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; |
4a78b8c5 | 61 | if (ok) |
62 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
8c6a71ab | 63 | } |
64 | ||
c630aafd | 65 | if ((t->GetStatus()&AliESDtrack::kTRDpid )!=0) { |
66 | Double_t d[10]; | |
67 | t->GetTRDpid(d); | |
4a78b8c5 | 68 | Int_t j, ok=0; |
4f679a16 | 69 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; |
4a78b8c5 | 70 | if (ok) |
71 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
c630aafd | 72 | } |
73 | ||
b4b3a4d6 | 74 | if (t->GetP()>0.7) // accept the TOF only for the high momenta |
4a78b8c5 | 75 | if ((t->GetStatus()&AliESDtrack::kTOFpid )!=0) { |
76 | Double_t d[10]; | |
77 | t->GetTOFpid(d); | |
78 | Int_t j, ok=0; | |
4f679a16 | 79 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; |
4a78b8c5 | 80 | if (ok) |
81 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
82 | } | |
83 | ||
f4b3bbb7 | 84 | if ((t->GetStatus()&AliESDtrack::kHMPIDpid )!=0) { |
4a78b8c5 | 85 | Double_t d[10]; |
f4b3bbb7 | 86 | t->GetHMPIDpid(d); |
4a78b8c5 | 87 | Int_t j, ok=0; |
4f679a16 | 88 | for (j=0; j<ns; j++) if (d[j]>keps) ok=1; |
4a78b8c5 | 89 | if (ok) |
90 | for (j=0; j<ns; j++) p[j]*=d[j]; | |
91 | } | |
c630aafd | 92 | |
8c6a71ab | 93 | t->SetESDpid(p); |
94 | } | |
95 | return 0; | |
96 | } |