+#include "TChain.h"
+#include "TTree.h"
+#include "TH1F.h"
+#include "TH2F.h"
+#include "TList.h"
+#include "TClonesArray.h"
+#include "TCanvas.h"
+#include "TStyle.h"
+#include "TLine.h"
+#include "TText.h"
+#include "TFile.h"
+#include "TBenchmark.h"
+
+#include "AliAnalysisTask.h"
+#include "AliAnalysisManager.h"
+
+#include "AliLog.h"
+#include "AliVEvent.h"
+#include "AliESDEvent.h"
+#include "AliMCEvent.h"
+#include "AliAODEvent.h"
+
+#include "AliTrackReference.h"
+#include "AliMCComparisonTrack.h"
+
+#include "AliTPCComparisonTask.h"
+
+ClassImp(AliTPCComparisonTask)
+
+AliTPCComparisonTask::AliTPCComparisonTask(const char* name)
+ : AliAnalysisTaskSE(name), fListOfHistos(0), hgood(0), hfound(0),
+ hfake(0), hp(0), hl(0), hpt(0), hmpt(0), he(0), hep(0), hgoodPhi(0),
+ hfoundPhi(0)
+{
+ // Constructor
+ AliInfo("Constructor AliTPCComparisonTask");
+ // Define input and output slots here
+ // Input slot #0 works with a TChain
+ DefineInput(0, TChain::Class());
+ // Output slot #1 TList
+ DefineOutput(1, TList::Class());
+}
+
+
+
+void AliTPCComparisonTask::UserCreateOutputObjects()
+{
+ // Create histograms
+ // Called once
+ AliInfo("AliTPCComparisonTask::UserCreateOutputObjects");
+ // Create output container
+ fListOfHistos = new TList();
+
+ hgood = new TH1F("hgood", "Good tracks", 30, 0.2, 6.1);
+ hfound= new TH1F("hfound", "Found tracks", 30, 0.2, 6.1);
+ hfake = new TH1F("hfake", "Fake tracks", 30, 0.2, 6.1);
+ hp = new TH1F("hp", "PHI resolution", 50, -20., 20.);
+ hl = new TH1F("hl", "LAMBDA resolution", 50, -20., 20.);
+ hpt = new TH1F("hpt", "Relative Pt resolution", 30, -10., 10.);
+ hmpt = new TH1F("hmpt", "Relative Pt resolution (pt>4GeV/c)", 30, -60., 60.);
+ he = new TH1F("he", "dE/dX for pions with 0.4<p<0.5 GeV/c", 50, 0., 100.);
+ hep = new TH2F("hep", "dE/dX vs momentum", 50, 0., 2., 50, 0., 400.);
+ hgoodPhi = new TH1F("hgoodPhi", "Phi for Good tracks", 90, -TMath::Pi(), TMath::Pi());
+ hfoundPhi = new TH1F("hfoundPhi", "Phi for Found tracks", 90, -TMath::Pi(), TMath::Pi());
+
+ fListOfHistos->Add(hgood);
+ fListOfHistos->Add(hfound);
+ fListOfHistos->Add(hfake);
+ fListOfHistos->Add(hp);
+ fListOfHistos->Add(hl);
+ fListOfHistos->Add(hpt);
+ fListOfHistos->Add(hmpt);
+ fListOfHistos->Add(he);
+ fListOfHistos->Add(hep);
+ fListOfHistos->Add(hgoodPhi);
+ fListOfHistos->Add(hfoundPhi);
+}
+
+
+void AliTPCComparisonTask::UserExec(Option_t *)
+{
+ // Main loop
+ // Called for each event
+
+ // MC information
+ AliMCEvent* mcEvent = MCEvent();
+ if (!mcEvent) {
+ Printf("ERROR: Could not retrieve MC event");
+ return;
+ }
+
+ Printf("MC particles: %d", mcEvent->GetNumberOfTracks());
+
+ Int_t nt = 0;
+
+ TClonesArray dummy("AliMCComparisonTrack",1000), *refs=&dummy;
+
+ for (Int_t iTracks = 0; iTracks < mcEvent->GetNumberOfTracks(); iTracks++)
+ {
+ AliMCParticle* track = mcEvent->GetTrack(iTracks);
+ if (!track)
+ {
+ Printf("ERROR: Could not receive track %d (mc loop)", iTracks);
+ continue;
+ }
+
+ // Track selection
+ if (track->Pt()<0.100) continue;
+ if (TMath::Abs(track->Pz()/track->Pt())>0.999) continue;
+
+ Double_t vx=track->Xv(),vy=track->Yv(),vz=track->Zv();
+ if (TMath::Sqrt(vx*vx+vy*vy)>3.5) continue;
+ if (TMath::Abs(vz) > 50.) continue;
+
+ Bool_t LabelTPC = kFALSE;
+ AliTrackReference* trackRef = 0;
+ for (Int_t iTrackRef = 0; iTrackRef < track->GetNumberOfTrackReferences(); iTrackRef++)
+ {
+ trackRef = track->GetTrackReference(iTrackRef);
+ if(trackRef)
+ {
+ Int_t detectorId = trackRef->DetectorId();
+ if (detectorId == AliTrackReference::kTPC)
+ {
+ LabelTPC = kTRUE;
+ break;
+ }
+ }
+ }
+ if (LabelTPC)
+ {
+ AliMCComparisonTrack *ref=new((*refs)[nt]) AliMCComparisonTrack();
+ ref->SetLabel(iTracks);
+ TParticle* particle= track->Particle();
+ Int_t pdg = particle->GetPdgCode();
+ ref->SetPDG(pdg);
+ ref->SetTPCMomentum(trackRef->Px(),trackRef->Py(),trackRef->Pz());
+ Float_t Pt = TMath::Sqrt(trackRef->Px()*trackRef->Px() +
+ trackRef->Py()*trackRef->Py());
+ hgood->Fill(Pt);
+ Float_t phig=TMath::ATan2(trackRef->Py(),trackRef->Px());
+ hgoodPhi->Fill(phig);
+ nt++;
+ }
+ } //track loop
+
+
+ // ESD information
+ AliVEvent *event = InputEvent();
+ if (!event) {
+ Printf("ERROR: Could not retrieve event");
+ return;
+ }
+
+
+ AliESDEvent* esd = dynamic_cast<AliESDEvent*>(event);
+
+ Bool_t iFound;
+ Int_t nfound = 0;
+ Int_t nfake = 0;
+ Int_t nlost = 0;
+
+ Int_t MCgoods = refs->GetEntriesFast();
+
+ for (Int_t k = 0; k < MCgoods; k++)
+ {
+ AliMCComparisonTrack *ref=(AliMCComparisonTrack*)refs->UncheckedAt(k);
+ Int_t MCLabel = ref->GetLabel();
+ Float_t ptg =
+ TMath::Sqrt(ref->GetTPCPx()*ref->GetTPCPx() +
+ ref->GetTPCPy()*ref->GetTPCPy());
+ Float_t PhiG=TMath::ATan2(ref->GetTPCPy(),ref->GetTPCPx());
+
+ iFound = kFALSE;
+ for (Int_t iTrack = 0; iTrack < esd->GetNumberOfTracks(); iTrack++)
+ {
+ AliESDtrack* track = esd->GetTrack(iTrack);
+ if (!track)
+ {
+ Printf("ERROR: Could not receive track %d", iTrack);
+ continue;
+ }
+ Int_t TPCLabel = track->GetTPCLabel();
+
+ if (MCLabel == TMath::Abs(TPCLabel))
+ {
+ if (MCLabel == TPCLabel)
+ {
+ nfound++;
+ hfound->Fill(ptg);
+ hfoundPhi->Fill(PhiG);
+ }
+ else
+ {
+ nfake++;
+ hfake->Fill(ptg);
+ }
+ iFound = kTRUE;
+
+
+ Double_t pxpypz[3]; track->GetInnerPxPyPz(pxpypz);
+ Float_t phi=TMath::ATan2(pxpypz[1],pxpypz[0]);
+ if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
+ if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
+ Double_t pt=TMath::Sqrt(pxpypz[0]*pxpypz[0]+pxpypz[1]*pxpypz[1]);
+ Float_t lam=TMath::ATan2(pxpypz[2],pt);
+ Float_t pt_1=1/pt;
+
+ Int_t pdg=(Int_t)ref->GetPDG();
+ if (TMath::Abs(pdg)==11 && ptg>4.)
+ {
+ //high momentum electrons
+ hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
+ }
+ else
+ {
+ Float_t phig=TMath::ATan2(ref->GetTPCPy(),ref->GetTPCPx());
+ hp->Fill((phi - phig)*1000.);
+ Float_t lamg=TMath::ATan2(ref->GetTPCPz(),ptg);
+ hl->Fill((lam - lamg)*1000.);
+ hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
+ }
+
+ Float_t mom=pt/TMath::Cos(lam);
+ Float_t dedx=track->GetTPCsignal();
+ hep->Fill(mom,dedx,1.);
+ if (TMath::Abs(pdg)==211) //pions
+ if (mom>0.4 && mom<0.5)
+ {
+ he->Fill(dedx,1.);
+ }
+
+
+ break;
+ }
+ }
+ if (!iFound)
+ {
+ nlost++;
+ }
+ }
+
+ Printf(" Results: " );
+ Printf(" Found %d Fake %d Lost %d ", nfound, nfake, nlost);
+
+ refs->Clear();
+
+ // Post output data.
+ PostData(1, fListOfHistos);
+}
+
+//________________________________________________________________________
+void AliTPCComparisonTask::Terminate(Option_t *)
+{
+ // Draw result to the screen
+ // Called once at the end of the query
+
+ fListOfHistos = dynamic_cast<TList*>(GetOutputData(1));
+ if (!fListOfHistos) {
+ Printf("ERROR: fListOfHistos not available");
+ return;
+ }
+
+
+ hgood = dynamic_cast<TH1F*>(fListOfHistos->At(0));
+ hfound = dynamic_cast<TH1F*>(fListOfHistos->At(1));
+ hfake = dynamic_cast<TH1F*>(fListOfHistos->At(2));
+ hp = dynamic_cast<TH1F*>(fListOfHistos->At(3));
+ hl = dynamic_cast<TH1F*>(fListOfHistos->At(4));
+ hpt = dynamic_cast<TH1F*>(fListOfHistos->At(5));
+ hmpt = dynamic_cast<TH1F*>(fListOfHistos->At(6));
+ he = dynamic_cast<TH1F*>(fListOfHistos->At(7));
+ hep = dynamic_cast<TH2F*>(fListOfHistos->At(8));
+ hgoodPhi = dynamic_cast<TH1F*>(fListOfHistos->At(9));
+ hfoundPhi = dynamic_cast<TH1F*>(fListOfHistos->At(10));
+
+
+ gStyle->SetOptStat(111110);
+ gStyle->SetOptFit(1);
+
+ TCanvas* c1=new TCanvas("c1","",0,0,700,850);
+
+ Int_t minc=33;
+
+ TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
+ p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
+ hp->SetFillColor(4); hp->SetXTitle("(mrad)");
+ if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
+
+ TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
+ p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
+ hl->SetXTitle("(mrad)");
+ if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
+
+ TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
+ p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
+ hpt->SetXTitle("(%)");
+ if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
+
+ TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
+ p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
+ hmpt->SetXTitle("(%)");
+ if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus"); c1->cd();
+
+
+ TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
+ p5->SetFillColor(41); p5->SetFrameFillColor(10);
+ hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
+ TH1F* hg = new TH1F("hg", "Efficiency for good tracks", 30, 0.2, 6.1);
+ TH1F* hf = new TH1F("hf", "Efficiency for fake tracks", 30, 0.2, 6.1);
+ hg->Divide(hfound,hgood,1.,1.,"B");
+ hf->Divide(hfake,hgood,1.,1.,"B");
+ hg->SetMaximum(1.4);
+ hg->SetYTitle("Tracking efficiency");
+ hg->SetXTitle("Pt (GeV/c)");
+ hg->Draw();
+
+ TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
+ line1->Draw("same");
+ TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
+ line2->Draw("same");
+
+ hf->SetFillColor(1);
+ hf->SetFillStyle(3013);
+ hf->SetLineColor(2);
+ hf->SetLineWidth(2);
+ hf->Draw("histsame");
+ TText *text = new TText(0.461176,0.248448,"Fake tracks");
+ text->SetTextSize(0.05);
+ text->Draw();
+ text = new TText(0.453919,1.11408,"Good tracks");
+ text->SetTextSize(0.05);
+ text->Draw();
+
+ TCanvas *c2=new TCanvas("c2","",320,32,530,590);
+
+ TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
+ p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
+ he->SetFillColor(2); he->SetFillStyle(3005);
+ he->SetXTitle("Arbitrary Units");
+ if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
+
+ TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
+ p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
+ hep->SetFillColor(2); hep->SetFillStyle(3005);
+ hep->SetXTitle("p (GeV/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
+ hep->Draw(); c1->cd();
+
+ TCanvas* c3=new TCanvas("c3","",10,10,510,510);
+ c3->SetFillColor(42); c3->SetFrameFillColor(10);
+ hfoundPhi->Sumw2(); hgoodPhi->Sumw2();
+ TH1F* hgphi = new TH1F("hgphi", "Efficiency for good tracks (Phi)",
+ 90, -TMath::Pi(), TMath::Pi());
+ hgphi->Divide(hfoundPhi,hgoodPhi,1.,1.,"B");
+ hgphi->SetYTitle("Tracking efficiency");
+ hgphi->SetXTitle("Phi (rad)");
+ hgphi->Draw();
+
+ TFile fc("AliTPCComparison.root","RECREATE");
+ c1->Write();
+ c2->Write();
+ c3->Write();
+ fc.Close();
+
+}