1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
19 /// \file MUONRecoCheck.C
20 /// \brief Utility macro to check the muon reconstruction.
22 /// Reconstructed tracks are compared to reference tracks. The reference tracks
23 /// are built from AliTrackReference for the hit in chamber (0..9) and from
24 /// kinematics (TreeK) for the vertex parameters.
26 /// \author Jean-Pierre Cussonneau, Subatech
29 #include "TClonesArray.h"
34 #include "AliCDBManager.h"
37 #include "AliMUONCDB.h"
38 #include "AliMUONConstants.h"
39 #include "AliMUONTrack.h"
40 #include "AliMUONRecoCheck.h"
41 #include "AliMUONTrackParam.h"
42 #include "AliMUONTrackExtrap.h"
43 #include "AliMUONRecoParam.h"
44 #include "AliMUONVTrackStore.h"
46 Int_t TrackCheck( Bool_t *compTrack);
48 void MUONRecoCheck (Int_t nEvent = -1, char * pathSim="./generated/", char * esdFileName="AliESDs.root",
49 const char* ocdbPath = "local://$ALICE_ROOT/OCDB")
53 Bool_t compTrackOK[10];
57 AliMUONTrack* trackOK(0x0);
59 Double_t maxChi2 = 999.;
60 AliMUONTrackParam *trackParam;
61 Double_t x1,y1,z1,pX1,pY1,pZ1,p1;
62 Double_t x2,y2,z2,pX2,pY2,pZ2,p2;
64 // File for histograms and histogram booking
65 TFile *histoFile = new TFile("MUONRecoCheck.root", "RECREATE");
67 TH1F *hReconstructible = new TH1F("hReconstructible"," Nb of reconstructible tracks ",15,-0.5,14.5);
68 TH1F *hReco = new TH1F("hReco"," Nb of reconstructed tracks / evt",15,-0.5,14.5);
69 TH1F *hNClusterComp = new TH1F("hNClusterComp"," Nb of compatible clusters / track ",15,-0.5,14.5);
70 TH1F *hTestTrack = new TH1F("hTestTrack"," Reconstruction requirement / track",15,-0.5,14.5);
71 TH1F *hTrackRefID = new TH1F("hTrackRefID"," track reference ID ",100,-0.5,99.5);
73 TH1F *hResMomVertex = new TH1F("hResMomVertex"," delta P vertex (GeV/c)",100,-10.,10);
74 TH1F *hResMomFirstCluster = new TH1F("hResMomFirstCluster"," delta P first cluster (GeV/c)",100,-10.,10);
76 AliMUONRecoCheck rc(esdFileName, pathSim);
78 // load necessary data from OCDB
79 AliCDBManager::Instance()->SetDefaultStorage(ocdbPath);
80 AliCDBManager::Instance()->SetRun(rc.GetRunNumber());
81 AliMUONCDB::LoadField();
82 AliMUONRecoParam* recoParam = AliMUONCDB::LoadRecoParam();
83 if (!recoParam) return;
85 // set the magnetic field for track extrapolations
86 AliMUONTrackExtrap::SetField();
88 // get sigma cut from recoParam to associate clusters with TrackRefs
89 Double_t sigmaCut = (recoParam->ImproveTracks()) ? recoParam->GetSigmaCutForImprovement() : recoParam->GetSigmaCutForTracking();
91 Int_t nevents = rc.NumberOfEvents();
93 if (nevents < nEvent || nEvent < 0) nEvent = nevents;
96 Int_t nReconstructibleTracks = 0;
97 Int_t nReconstructedTracks = 0;
98 Int_t nReconstructibleTracksCheck = 0;
100 for (ievent=0; ievent<nEvent; ievent++)
102 if (!(ievent%10)) printf(" **** event # %d \n",ievent);
104 AliMUONVTrackStore* trackStore = rc.ReconstructedTracks(ievent, kFALSE);
105 AliMUONVTrackStore* trackRefStore = rc.ReconstructibleTracks(ievent);
107 hReconstructible->Fill(trackRefStore->GetSize());
108 hReco->Fill(trackStore->GetSize());
110 nReconstructibleTracks += trackRefStore->GetSize();
111 nReconstructedTracks += trackStore->GetSize();
113 TIter next(trackRefStore->CreateIterator());
114 AliMUONTrack* trackRef;
116 while ( ( trackRef = static_cast<AliMUONTrack*>(next()) ) )
121 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
123 compTrackOK[ch] = kFALSE;
126 TIter next2(trackStore->CreateIterator());
127 AliMUONTrack* trackReco;
129 while ( ( trackReco = static_cast<AliMUONTrack*>(next2()) ) )
131 // check if trackRef is compatible with trackReco
132 if (trackReco->GetNClusters() > 1) {
134 // check cluster by cluster if trackReco contain info at each cluster
135 trackRef->CompatibleTrack(trackReco,sigmaCut,compTrack);
137 iTrack = TrackCheck(compTrack);
139 if (iTrack > testTrack)
142 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
144 if (compTrack[ch]) nClusterOk++;
145 compTrackOK[ch] = compTrack[ch];
153 // check only parameters at the z position of the first trackRef
154 AliMUONTrackParam *refParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First();
155 AliMUONTrackParam recoParam(*((AliMUONTrackParam*) trackReco->GetTrackParamAtCluster()->First()));
157 if (AliMUONTrackExtrap::ExtrapToZCov(&recoParam, refParam->GetZ()) &&
158 refParam->CompatibleTrackParam(recoParam, sigmaCut, chi2) && chi2 < maxChi2)
168 hTestTrack->Fill(testTrack);
169 trackID = trackRef->GetMCLabel();
170 hTrackRefID->Fill(trackID);
172 if (testTrack == 4 || maxChi2 < 5.*sigmaCut*sigmaCut) { // tracking requirements verified, track is found
173 nReconstructibleTracksCheck++;
174 hNClusterComp->Fill(nClusterOk);
175 trackParam = trackRef->GetTrackParamAtVertex();
176 x1 = trackParam->GetNonBendingCoor();
177 y1 = trackParam->GetBendingCoor();
178 z1 = trackParam->GetZ();
179 pX1 = trackParam->Px();
180 pY1 = trackParam->Py();
181 pZ1 = trackParam->Pz();
182 p1 = trackParam->P();
184 // printf(" Ref. track at vertex: x,y,z: %f %f %f px,py,pz,p: %f %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1,p1);
186 trackParam = new AliMUONTrackParam(*((AliMUONTrackParam*)(trackReco->GetTrackParamAtVertex())));
187 x2 = trackParam->GetNonBendingCoor();
188 y2 = trackParam->GetBendingCoor();
189 z2 = trackParam->GetZ();
190 pX2 = trackParam->Px();
191 pY2 = trackParam->Py();
192 pZ2 = trackParam->Pz();
193 p2 = trackParam->P();
195 // printf(" Reconst. track at vertex: x,y,z: %f %f %f px,py,pz: %f %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2,p2);
197 hResMomVertex->Fill(p2-p1);
199 trackParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First();
200 x1 = trackParam->GetNonBendingCoor();
201 y1 = trackParam->GetBendingCoor();
202 z1 = trackParam->GetZ();
203 pX1 = trackParam->Px();
204 pY1 = trackParam->Py();
205 pZ1 = trackParam->Pz();
206 p1 = trackParam->P();
207 // printf(" Ref. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1);
208 trackParam = (AliMUONTrackParam*) trackOK->GetTrackParamAtCluster()->First();
209 x2 = trackParam->GetNonBendingCoor();
210 y2 = trackParam->GetBendingCoor();
211 z2 = trackParam->GetZ();
212 pX2 = trackParam->Px();
213 pY2 = trackParam->Py();
214 pZ2 = trackParam->Pz();
215 p2 = trackParam->P();
216 // printf(" Reconst. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2);
218 hResMomFirstCluster->Fill(p2-p1);
221 } // end loop track ref.
223 } // end loop on event
225 printf(" nb of reconstructible tracks: %d \n", nReconstructibleTracks);
226 printf(" nb of reconstructed tracks: %d \n", nReconstructedTracks);
227 printf(" nb of reconstructible tracks which are reconstructed: %d \n", nReconstructibleTracksCheck);
234 Int_t TrackCheck( Bool_t *compTrack)
236 // Apply reconstruction requirements
237 // Return number of validated conditions
238 // If all the tests are verified then TrackCheck = 4 (good track)
240 Int_t nCompClustersInLastStations = 0;
242 // apply reconstruction requirements
243 if (compTrack[0] || compTrack[1]) iTrack++; // at least one compatible cluster in st. 0
244 if (compTrack[2] || compTrack[3]) iTrack++; // at least one compatible cluster in st. 1
245 if (compTrack[4] || compTrack[5]) iTrack++; // at least one compatible cluster in st. 2
246 for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++) {
247 if (compTrack[ch]) nCompClustersInLastStations++;
249 if (nCompClustersInLastStations > 2) iTrack++; // at least 3 compatible clusters in st. 3 & 4