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c865cb1d | 1 | // |
2 | // Class AliRsnCutPIDNSigma | |
3 | // | |
4 | // General implementation of a single cut strategy, which can be: | |
5 | // - a value contained in a given interval [--> IsBetween() ] | |
6 | // - a value equal to a given reference [--> MatchesValue()] | |
7 | // | |
8 | // In all cases, the reference value(s) is (are) given as data members | |
9 | // and each kind of cut requires a given value type (Int, UInt, Double), | |
10 | // but the cut check procedure is then automatized and chosen thanks to | |
11 | // an enumeration of the implemented cut types. | |
12 | // At the end, the user (or any other point which uses this object) has | |
13 | // to use the method IsSelected() to check if this cut has been passed. | |
14 | // | |
15 | // authors: Martin Vala (martin.vala@cern.ch) | |
16 | // Alberto Pulvirenti (alberto.pulvirenti@ct.infn.it) | |
17 | // | |
18 | ||
19 | #include "AliPIDResponse.h" | |
b6ab153d | 20 | #include "AliESDpid.h" |
21 | #include "AliAODpidUtil.h" | |
c865cb1d | 22 | |
23 | #include "AliRsnCutPIDNSigma.h" | |
24 | ||
c31027eb | 25 | ClassImp(AliRsnCutPIDNSigma) |
c865cb1d | 26 | |
64129b35 | 27 | //_________________________________________________________________________________________________ |
61f275d1 | 28 | AliRsnCutPIDNSigma::AliRsnCutPIDNSigma() : |
64129b35 | 29 | AliRsnCut("cut", AliRsnTarget::kDaughter), |
30 | fSpecies(AliPID::kUnknown), | |
31 | fDetector(kDetectors), | |
89ccdaab | 32 | fRejectUnmatched(kTRUE), |
b6ab153d | 33 | fTrackNSigma(0.0), |
34 | fTrackMom(0.0), | |
35 | fMyPID(0x0), | |
b63dbf69 | 36 | fRanges("AliRsnPIDRange", 0) |
64129b35 | 37 | { |
38 | // | |
39 | // Main constructor. | |
40 | // | |
41 | } | |
42 | ||
c865cb1d | 43 | //_________________________________________________________________________________________________ |
44 | AliRsnCutPIDNSigma::AliRsnCutPIDNSigma | |
b6ab153d | 45 | (const char *name, AliPID::EParticleType species, EDetector det) : |
64129b35 | 46 | AliRsnCut(name, AliRsnTarget::kDaughter), |
c865cb1d | 47 | fSpecies(species), |
48 | fDetector(det), | |
89ccdaab | 49 | fRejectUnmatched(kTRUE), |
b6ab153d | 50 | fTrackNSigma(0.0), |
51 | fTrackMom(0.0), | |
52 | fMyPID(0x0), | |
b63dbf69 | 53 | fRanges("AliRsnPIDRange", 0) |
c865cb1d | 54 | { |
55 | // | |
56 | // Main constructor. | |
57 | // | |
58 | } | |
59 | ||
60 | //_________________________________________________________________________________________________ | |
61 | AliRsnCutPIDNSigma::AliRsnCutPIDNSigma | |
61f275d1 | 62 | (const AliRsnCutPIDNSigma ©) : |
c865cb1d | 63 | AliRsnCut(copy), |
64 | fSpecies(copy.fSpecies), | |
65 | fDetector(copy.fDetector), | |
64129b35 | 66 | fRejectUnmatched(copy.fRejectUnmatched), |
b6ab153d | 67 | fTrackNSigma(0.0), |
68 | fTrackMom(0.0), | |
69 | fMyPID(copy.fMyPID), | |
70 | fRanges(copy.fRanges) | |
c865cb1d | 71 | { |
72 | // | |
73 | // Copy constructor. | |
74 | // | |
75 | } | |
76 | ||
77 | //_________________________________________________________________________________________________ | |
61f275d1 | 78 | AliRsnCutPIDNSigma &AliRsnCutPIDNSigma::operator=(const AliRsnCutPIDNSigma ©) |
c865cb1d | 79 | { |
80 | // | |
81 | // Assignment operator | |
82 | // | |
83 | ||
84 | AliRsnCut::operator=(copy); | |
e6f3a909 | 85 | if (this == ©) |
61f275d1 | 86 | return *this; |
c865cb1d | 87 | fSpecies = copy.fSpecies; |
88 | fDetector = copy.fDetector; | |
64129b35 | 89 | fRejectUnmatched = copy.fRejectUnmatched; |
b6ab153d | 90 | fMyPID = copy.fMyPID; |
91 | fRanges = copy.fRanges; | |
c865cb1d | 92 | |
93 | return (*this); | |
94 | } | |
95 | ||
b6ab153d | 96 | //__________________________________________________________________________________________________ |
97 | void AliRsnCutPIDNSigma::InitMyPID(Bool_t isMC, Bool_t isESD) | |
98 | { | |
99 | // | |
100 | // Initialize manual PID object | |
101 | // | |
102 | ||
61f275d1 | 103 | if (isESD) |
b6ab153d | 104 | fMyPID = new AliESDpid(isMC); |
105 | else | |
106 | fMyPID = new AliAODpidUtil(isMC); | |
107 | } | |
108 | ||
c865cb1d | 109 | //_________________________________________________________________________________________________ |
110 | Bool_t AliRsnCutPIDNSigma::IsSelected(TObject *object) | |
111 | { | |
112 | // | |
113 | // Cut checker. | |
b6ab153d | 114 | // As usual, there are 'kFALSE' exit points whenever one of the conditions is not passed, |
115 | // and at the end, it returns kTRUE since it bypassed all possible exit points. | |
c865cb1d | 116 | // |
117 | ||
118 | // coherence check | |
119 | if (!TargetOK(object)) return kFALSE; | |
61f275d1 | 120 | |
c865cb1d | 121 | // check initialization of PID object |
b6ab153d | 122 | // if manual PID is used, use that, otherwise get from source event |
123 | AliPIDResponse *pid = 0x0; | |
61f275d1 | 124 | if (fMyPID) |
125 | pid = fMyPID; | |
126 | else | |
b6ab153d | 127 | pid = fEvent->GetPIDResponse(); |
c865cb1d | 128 | if (!pid) { |
129 | AliFatal("NULL PID response"); | |
130 | return kFALSE; | |
131 | } | |
132 | ||
b6ab153d | 133 | // convert input object into AliVTrack |
134 | // if this fails, the cut cannot be checked | |
64129b35 | 135 | AliVTrack *vtrack = fDaughter->Ref2Vtrack(); |
136 | if (!vtrack) { | |
c865cb1d | 137 | AliDebugClass(2, "Referenced daughter is not a track"); |
138 | return kFALSE; | |
139 | } | |
61f275d1 | 140 | |
b6ab153d | 141 | // check matching, if required |
142 | // a) if detector is not matched and matching is required, reject the track | |
143 | // b) if detector is not matched and matching is not required, accept blindly the track | |
144 | // since missing the matching causes one not to be able to rely that detector | |
145 | if (!MatchDetector(vtrack)) { | |
146 | AliDebugClass(2, Form("Detector not matched. fRejectUnmatched = %s --> track is %s", (fRejectUnmatched ? "true" : "false"), (fRejectUnmatched ? "rejected" : "accepted"))); | |
147 | return (!fRejectUnmatched); | |
c865cb1d | 148 | } |
61f275d1 | 149 | |
b6ab153d | 150 | // get reference momentum |
151 | fTrackMom = (fDetector == kTPC) ? vtrack->GetTPCmomentum() : vtrack->P(); | |
61f275d1 | 152 | |
b6ab153d | 153 | // get number of sigmas |
c865cb1d | 154 | switch (fDetector) { |
155 | case kITS: | |
b6ab153d | 156 | fTrackNSigma = TMath::Abs(pid->NumberOfSigmasITS(vtrack, fSpecies)); |
c865cb1d | 157 | break; |
158 | case kTPC: | |
b6ab153d | 159 | fTrackNSigma = TMath::Abs(pid->NumberOfSigmasTPC(vtrack, fSpecies)); |
c865cb1d | 160 | break; |
161 | case kTOF: | |
b6ab153d | 162 | fTrackNSigma = TMath::Abs(pid->NumberOfSigmasTOF(vtrack, fSpecies)); |
c865cb1d | 163 | break; |
164 | default: | |
64129b35 | 165 | AliError("Bad detector chosen. Rejecting track"); |
c865cb1d | 166 | return kFALSE; |
167 | } | |
61f275d1 | 168 | |
b6ab153d | 169 | // loop on all ranges, and use the one which contains this momentum |
170 | // if none is found, the cut is not passed | |
171 | Bool_t accept = kFALSE; | |
172 | Int_t i, goodRange = -1, nRanges = fRanges.GetEntriesFast(); | |
173 | for (i = 0; i < nRanges; i++) { | |
61f275d1 | 174 | AliRsnPIDRange *range = (AliRsnPIDRange *)fRanges[i]; |
b6ab153d | 175 | if (!range) continue; |
176 | if (!range->IsInRange(fTrackMom)) continue; | |
177 | else { | |
178 | goodRange = i; | |
179 | accept = range->CutPass(fTrackNSigma); | |
180 | AliDebugClass(2, Form("[%s] NSigma = %.3f, max = %.3f, track %s", GetName(), fTrackNSigma, range->NSigmaCut(), (accept ? "accepted" : "rejected"))); | |
181 | break; | |
182 | } | |
183 | } | |
184 | if (goodRange < 0) { | |
185 | AliDebugClass(2, Form("[%s] No good range found. Rejecting track", GetName())); | |
64129b35 | 186 | return kFALSE; |
187 | } else { | |
b6ab153d | 188 | AliDebugClass(2, Form("[%s] Mom = %.3f, good range found (#%d), track was %s", GetName(), fTrackMom, goodRange, (accept ? "accepted" : "rejected"))); |
189 | return accept; | |
64129b35 | 190 | } |
c865cb1d | 191 | } |
192 | ||
193 | //_________________________________________________________________________________________________ | |
194 | void AliRsnCutPIDNSigma::Print(const Option_t *) const | |
195 | { | |
196 | // | |
197 | // Print information on this cut | |
198 | // | |
199 | ||
4f926d1d | 200 | Char_t mom[200], det[100], match[200]; |
61f275d1 | 201 | |
c865cb1d | 202 | if (fRejectUnmatched) |
e187bd70 | 203 | snprintf(match, 200, "Unmatched tracks are rejected"); |
c865cb1d | 204 | else |
e187bd70 | 205 | snprintf(match, 200, "No check on track matching"); |
61f275d1 | 206 | |
c865cb1d | 207 | switch (fDetector) { |
4f926d1d | 208 | case kITS: snprintf(det, 3, "ITS"); break; |
209 | case kTPC: snprintf(det, 3, "TPC"); break; | |
210 | case kTOF: snprintf(det, 3, "TOF"); break; | |
211 | default : snprintf(det, 3, "undefined"); | |
c865cb1d | 212 | } |
213 | ||
214 | AliInfo(Form("Cut name : %s", GetName())); | |
215 | AliInfo(Form("--> PID detector : %s", det)); | |
216 | AliInfo(Form("--> match criteria: %s", match)); | |
61f275d1 | 217 | AliInfo(Form("--> momentum range: %s", mom)); |
c865cb1d | 218 | } |
9cdd5474 | 219 | |
220 | //_________________________________________________________________________________________________ | |
221 | Bool_t AliRsnCutPIDNSigma::MatchITS(const AliVTrack *vtrack) const | |
222 | { | |
223 | // | |
224 | // Checks if the track has the status flags required for an ITS standalone track | |
225 | // | |
226 | ||
227 | if ((vtrack->GetStatus() & AliESDtrack::kITSin) == 0) return kFALSE; | |
228 | if ((vtrack->GetStatus() & AliESDtrack::kITSpid) == 0) return kFALSE; | |
229 | ||
230 | return kTRUE; | |
231 | } | |
232 | //_________________________________________________________________________________________________ | |
233 | Bool_t AliRsnCutPIDNSigma::MatchTPC(const AliVTrack *vtrack) const | |
234 | { | |
235 | // | |
236 | // Checks if the track has the status flags required for a TPC track | |
237 | // | |
238 | ||
239 | if ((vtrack->GetStatus() & AliESDtrack::kTPCin) == 0) return kFALSE; | |
240 | ||
241 | return kTRUE; | |
242 | } | |
243 | ||
244 | //_________________________________________________________________________________________________ | |
245 | Bool_t AliRsnCutPIDNSigma::MatchTOF(const AliVTrack *vtrack) const | |
246 | { | |
247 | // | |
248 | // Checks if the track has the status flags required for an ITS standalone track | |
249 | // | |
250 | ||
251 | if ((vtrack->GetStatus() & AliESDtrack::kTOFout) == 0) return kFALSE; | |
252 | if ((vtrack->GetStatus() & AliESDtrack::kTIME) == 0) return kFALSE; | |
253 | ||
254 | return kTRUE; | |
255 | } | |
256 | ||
257 | //_________________________________________________________________________________________________ | |
258 | Bool_t AliRsnCutPIDNSigma::MatchDetector(const AliVTrack *vtrack) const | |
259 | { | |
260 | // | |
261 | // Checks if the track has matched the required detector. | |
262 | // If no valid detector is specified, kFALSE is always returned. | |
263 | // | |
264 | ||
265 | switch (fDetector) { | |
266 | case kITS: return MatchITS(vtrack); | |
267 | case kTPC: return MatchTPC(vtrack); | |
268 | case kTOF: return MatchTOF(vtrack); | |
269 | default : return kFALSE; | |
270 | } | |
271 | } | |
272 | ||
273 | //_________________________________________________________________________________________________ | |
274 | void AliRsnCutPIDNSigma::AddPIDRange(Double_t nsigma, Double_t pmin, Double_t pmax) | |
275 | { | |
276 | // | |
277 | // Add a new slot for checking PID | |
278 | // | |
279 | ||
280 | Int_t n = fRanges.GetEntries(); | |
281 | ||
282 | new (fRanges[n]) AliRsnPIDRange(nsigma, pmin, pmax); | |
283 | } | |
284 | ||
285 | //_________________________________________________________________________________________________ | |
286 | void AliRsnCutPIDNSigma::SinglePIDRange(Double_t nsigma) | |
287 | { | |
288 | // | |
289 | // Clear all slots and sets a unique one | |
290 | // | |
291 | ||
292 | fRanges.Delete(); | |
293 | ||
294 | new (fRanges[0]) AliRsnPIDRange(nsigma, 0.0, 1E20); | |
295 | } |