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 iLs" without express or implied warranty. *
14 **************************************************************************/
19 // This class is a part of a package of high level QA monitoring for TRD.
22 // radomski@physi.uni-heidelberg.de
26 #include "AliTRDqaJPsi.h"
27 #include "AliTRDqaAT.h"
34 #include "AliESDEvent.h"
35 #include "AliESDtrack.h"
36 #include "AliKFParticle.h"
38 #include "TLorentzVector.h"
40 //______________________________________________________________________________
42 AliTRDqaJPsi::AliTRDqaJPsi()
43 : AliAnalysisTask("",""),
50 // default dummy constructor
55 //______________________________________________________________________________
56 AliTRDqaJPsi:: AliTRDqaJPsi(const AliTRDqaJPsi & /*trd*/)
57 : AliAnalysisTask("",""),
69 //______________________________________________________________________________
70 AliTRDqaJPsi::AliTRDqaJPsi(const char *name)
71 : AliAnalysisTask(name,""),
79 // Input slot #0 works with an Ntuple
80 DefineInput(0, TChain::Class());
81 // Output slot #0 writes into a TH1 container
82 DefineOutput(0, TObjArray::Class()) ;
85 //______________________________________________________________________________
86 void AliTRDqaJPsi::ConnectInputData(const Option_t *)
88 // Initialisation of branch container and histograms
90 //AliInfo(Form("*** Initialization of %s", GetName())) ;
92 fChain = (TChain*)GetInputData(0);
93 fESD = new AliESDEvent();
94 fESD->ReadFromTree(fChain);
97 //________________________________________________________________________
98 void AliTRDqaJPsi::CreateOutputObjects()
101 // Create the objects that contain the analysis output
105 fOutputContainer = new TObjArray(100);
107 const char *charge[2] = {"Neg", "Pos"};
111 for(Int_t i=0; i<fgknSteps; i++) {
113 fStatus[i] = new TH1D(Form("status_%d", i), "status", 32, -0.5, 31.5);
114 fOutputContainer->AddAt(fStatus[i], c++);
116 fInvMass[i] = new TH1D(Form("mass_%d", i), ";m_{inv} (GeV);", 100, 0, 5);
117 fOutputContainer->AddAt(fInvMass[i], c++);
119 fInvMassVec[i] = new TH1D(Form("massVec_%d", i), ";m_{inv} (GeV);", 100, 0, 5);
120 fOutputContainer->AddAt(fInvMassVec[i], c++);
122 fInvMassDiff[i] = new TH1D(Form("massDiff_%d", i), ";m_{inv} (GeV);", 100, -1, 1);
123 fOutputContainer->AddAt(fInvMassDiff[i], c++);
125 fAngleSM[i] = new TH1D(Form("angleSM_%d", i), ";#delta SM", 19, -0.5, 18.5);
126 fOutputContainer->AddAt(fAngleSM[i], c++);
128 fPtAngle[i] = new TH2D(Form("ptAngle_%d", i), ";p_{T} (GeV/c);#delta SM",
129 20, 0, 5, 10, -0.5, 9.5);
130 fOutputContainer->AddAt(fPtAngle[i], c++);
133 for(Int_t j=0; j<2; j++) {
134 fnTracks[j*fgknSteps+i] =
135 new TH1D(Form("nTracks%s_%d", charge[j],i), Form("%s;number of tracks",charge[j]), 100, -0.5, 99.5);
136 fPt[j*fgknSteps+i] = new TH1D(Form("pt%s_%d", charge[j], i), Form("%s;p_{T} (GeV/c)", charge[j]), 100, 0, 5);
137 fPID[j*fgknSteps+i] = new TH1D(Form("pid%s_%d", charge[j], i), ";electron LQ", 100, 0, 1);
139 fOutputContainer->AddAt(fnTracks[j*fgknSteps+i], c++);
140 fOutputContainer->AddAt(fPt[j*fgknSteps+i], c++);
141 fOutputContainer->AddAt(fPID[j*fgknSteps+i], c++);
145 //TH2D *fnGoodTracks;
147 printf("n hist = %d\n", c);
149 //______________________________________________________________________________
150 void AliTRDqaJPsi::Exec(Option_t *)
154 - Parameters In and Out
163 Long64_t entry = fChain->GetReadEntry() ;
164 if (!(entry%100)) Info("Exec", "Entry = %lld", entry);
166 // Processing of one event
169 //AliError("fESD is not connected to the input!") ;
174 Int_t nTracks = fESD->GetNumberOfTracks();
175 Int_t cTracks[2*fgknSteps] = {0,0,0,0,0,0,0,0,0,0};
179 for(Int_t i=0; i<nTracks; i++) {
185 // TRDrefit and TRDPid bit
188 AliESDtrack *track = fESD->GetTrack(i);
189 const AliExternalTrackParam *paramOut = track->GetOuterParam();
190 const AliExternalTrackParam *paramIn = track->GetInnerParam();
193 if (!paramIn) continue;
194 if (!paramOut) continue;
197 Int_t charge = (track->Charge() > 0) ? 1 : 0;
198 UInt_t status = track->GetStatus();
199 Double_t pt = track->Pt();
200 Double_t pid = track->GetTRDpid(AliPID::kElectron);
203 track->GetESDpid(esdPid);
205 // create a kalman particle
206 Int_t pdg = (charge == 0)? -11 : 11;
207 for(Int_t k=0; k<fgknSteps; k++) fInSample[fnKFtracks][k] = 0;
209 fVec[fnKFtracks] = CreateVector(track);
210 fTracks[fnKFtracks] = new AliKFParticle(*track, pdg);
211 fSM[fnKFtracks] = AliTRDqaAT::GetSector(paramOut->GetAlpha());
214 //AliTRDqaAT::PrintPID(track);
218 cTracks[fgknSteps *charge + step]++;
219 FillHist(track, step++);
221 if (!(status & AliESDtrack::kTRDrefit)) continue;
223 cTracks[fgknSteps *charge + step]++;
224 FillHist(track, step++);
226 if (!(status & AliESDtrack::kTRDpid)) continue;
227 if (track->GetTRDntracklets() < 6) continue;
229 cTracks[fgknSteps *charge + step]++;
230 FillHist(track, step++);
232 if (pt < 0.8) continue;
234 cTracks[fgknSteps *charge + step]++;
235 FillHist(track, step++);
237 if (pid < 0.3) continue; //
238 //if (esdPid[AliPID::kElectron] < 0.5) continue;
240 cTracks[fgknSteps *charge + step]++;
241 FillHist(track, step);
243 for(Int_t k=0; k<2*fgknSteps; k++) fnTracks[k]->Fill(cTracks[k]);
246 // calculate invariant mass
248 for(Int_t k=0; k<fgknSteps; k++) {
249 for(Int_t i=0; i<fnKFtracks; i++) {
250 if (!fInSample[i][k]) continue;
251 for(Int_t j=i+1; j<fnKFtracks; j++) {
252 if (!fInSample[j][k]) continue;
253 AliKFParticle jpsi(*(fTracks[i]), *(fTracks[j]));
254 TLorentzVector jpsiVec = (*(fVec[i])) + (*fVec[j]);
255 fInvMass[k]->Fill(jpsi.GetMass());
256 fInvMassVec[k]->Fill(jpsiVec.M());
257 fInvMassDiff[k]->Fill(jpsiVec.M() - jpsi.GetMass());
259 if (jpsi.GetMass() > 2.5 && jpsi.GetMass() < 3.5) {
260 Int_t dSM = TMath::Abs(fSM[i] - fSM[j]);
261 if (dSM > 9) dSM = (18-dSM);
262 fAngleSM[k]->Fill(dSM);
263 fPtAngle[k]->Fill(TMath::Hypot(jpsi.GetPx(), jpsi.GetPy()), dSM);
270 PostData(0, fOutputContainer);
273 //______________________________________________________________________________
274 void AliTRDqaJPsi::Terminate(Option_t *)
277 fOutputContainer = (TObjArray*)GetOutputData(0);
279 TFile *file = new TFile("outJPsi.root", "RECREATE");
280 fOutputContainer->Write();
286 //for(Int_t i=0; i<fOutputContainer->GetEntries(); i++) {
287 // TObject *obj = fOu
291 //______________________________________________________________________________
293 void AliTRDqaJPsi::FillHist(AliESDtrack *track, Int_t step) {
295 // Fill the histograms
298 Int_t charge = (track->Charge() > 0) ? 1 : 0;
299 UInt_t status = track->GetStatus();
300 Double_t pt = track->Pt();
301 Double_t pid = track->GetTRDpid(AliPID::kElectron);
304 track->GetESDpid(esdPid);
306 Int_t id = charge * fgknSteps + step;
307 AliTRDqaAT::FillStatus(fStatus[step], status);
310 //fPID[id]->Fill(esdPid[AliPID::kElectron]);
312 fInSample[fnKFtracks-1][step] = 1;
315 //______________________________________________________________________________
317 TLorentzVector *AliTRDqaJPsi::CreateVector(AliESDtrack *track) {
319 TLorentzVector *vec = new TLorentzVector();
320 vec->SetXYZM(track->Px(), track->Py(), track->Pz(), 0);
324 //______________________________________________________________________________