-//===============================================================
-// In this Macro (which can (must) be compilated), you will find all the
-// analysis functions to build photon spectrum, invariant mass
-// spectrum of photon pairs and combinatorial background calculations
-// in ALICE electromagnetic calorimeter
-// Author: Gines MARTINEZ, Subatech, 15 june 2001
-//==============================================================
-#include "TH2.h"
-#include "TH1.h"
-#include "TFile.h"
-#include "TTree.h"
-#include "TRandom.h"
-#include "TObjectTable.h"
-#include "AliRun.h"
-#include "AliPHOSGetter.h"
-#include "AliPHOSRecParticle.h"
-#include "TLorentzVector.h"
-#include "TGraphErrors.h"
-#include "TF1.h"
-
-TObjectTable * gObjectTable;
-TRandom * gRandom;
-AliRun * gAlice;
-
-
-void AnaMinv(char * filename)
-{
- TH2F * h_Minv_lowpT = new TH2F("h_Minv_lowpT","Minv vs pT low",500,0.0,1.0,40,0.,10.);
- TH2F * h_Minv_highpT = new TH2F("h_Minv_highpT","Minv vs pT high",500,0.0,1.0,50,0.,100.);
- TH2F * h_Minv_lowpT_back = new TH2F("h_Minv_lowpT_back","Minv vs pT low back",500,0.0,1.0,40,0.,10.);
- TH2F * h_Minv_highpT_back = new TH2F("h_Minv_highpT_back","Minv vs pT high back",500,0.0,1.0,50,0.,100.);
-
-
- TH1F * h_Pseudoeta = new TH1F("h_Pseudoeta","Pseudoeta photons",500,-1.0,1.0);
- TH1F * h_Pt = new TH1F("h_Pt","Pt photons",400,0.,10.);
- TH2F * h_Peta_Pt = new TH2F("h_Peta_Pt","Pseudo vs pT",40,0.,10.,50,-1.0,1.0);
- TH1F * h_Phi = new TH1F("h_Phi","Phi photons",400,-4.,4.);
- TH2F * h_Peta_Phi = new TH2F("h_Peta_Phi","Pseudo vs Phi",200,-4,4,200,-1.0,1.0);
- TH1F * h_Dispersion= new TH1F("h_Dispersion","Dispersion",50,0.,10.);
- TH1F * h_Type = new TH1F("h_Type","Particle Type",10,0.,10.);
-
- TH1F * h_DeltaR = new TH1F("h_DeltaR","Delta R",400,0.,2.);
- TH1F * h_Asymmetry= new TH1F("h_Asymmetry","Asymmetry",400, -2., 2.);
-
- AliPHOSGetter * RecData = AliPHOSGetter::GetInstance(filename,"Gines") ;
-
- AliPHOSRecParticle * RecParticle1;
- AliPHOSRecParticle * RecParticle2;
-
- Float_t RelativeRCut = 0.00001 ;
- Float_t AsymmetryCut = 0.7 ;
- Float_t Asymmetry;
- Float_t Type;
-
- Int_t iEvent, iRecParticle1, iRecParticle2;
- Int_t nRecParticle;
- Float_t invariant_mass, invariant_mass_mixed;
-
- Float_t average_multiplicity = 0.;
-
- for(iEvent=0; iEvent<gAlice->TreeE()->GetEntries(); iEvent++)
- {
- TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ;
-
- RecData->Event(iEvent);
- printf(">>> Event %d \n",iEvent);
- nRecParticle=RecData->NRecParticles();
- average_multiplicity += ((Float_t) (nRecParticle) ) / ( (Float_t)gAlice->TreeE()->GetEntries() ) ;
- // Construction de la masse invariante des pairs
- if (nRecParticle > 1)
- {
- for(iRecParticle1=0; iRecParticle1<nRecParticle; iRecParticle1++)
- {
- RecParticle1 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle1);
- RecParticle1->Momentum(P_photon1);
- Type = RecParticle1->GetType();
- h_Type->Fill(Type);
-
-
- h_Pseudoeta->Fill(P_photon1.PseudoRapidity());
- h_Pt->Fill(P_photon1.Pt());
- h_Phi->Fill(P_photon1.Phi());
- h_Peta_Pt->Fill(P_photon1.Pt(), P_photon1.PseudoRapidity());
- h_Peta_Phi->Fill(P_photon1.Phi(), P_photon1.PseudoRapidity() );
-
- for(iRecParticle2=iRecParticle1+1; iRecParticle2<nRecParticle; iRecParticle2++)
- {
- RecParticle2 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle2);
- RecParticle2->Momentum(P_photon2);
- Asymmetry = TMath::Abs((P_photon1.E()-P_photon2.E())/(P_photon1.E()+P_photon2.E()));
- if ( (P_photon1 != P_photon2) &&
- (P_photon1.DeltaR(P_photon2) > RelativeRCut) &&
- (Asymmetry < AsymmetryCut) )
- {
- h_DeltaR->Fill(P_photon1.DeltaR(P_photon2));
- h_Asymmetry->Fill( Asymmetry );
-
- // printf("A. p1 es %f \n",P_photon1->E());
- invariant_mass = (P_photon1 + P_photon2).M();
- // printf("B. p1 es %f \n",P_photon1->E());
- h_Minv_lowpT->Fill(invariant_mass, (P_photon1 + P_photon2).Pt() );
- h_Minv_highpT->Fill(invariant_mass,(P_photon1 + P_photon2).Pt() );
- }
- }
- }
- }
- }
- printf(">>> Average Multiplicity is %f \n",average_multiplicity);
- Int_t Background = (Int_t) (gAlice->TreeE()->GetEntries() * average_multiplicity * (average_multiplicity-1.)/2.) ;
- printf(">>> Background is %d \n",Background);
-
- Double_t Pt_Mixed1, Pt_Mixed2;
- Double_t Y_Mixed1, Y_Mixed2;
- Double_t Phi_Mixed1, Phi_Mixed2;
-
- for(iEvent=0; iEvent<Background; iEvent++)
- {
- TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ;
- // printf(">>> Background Event %d \n",iEvent);
- Pt_Mixed1 = h_Pt->GetRandom();
- Pt_Mixed2 = h_Pt->GetRandom();
- h_Peta_Phi->GetRandom2(Phi_Mixed1, Y_Mixed1);
- h_Peta_Phi->GetRandom2(Phi_Mixed2, Y_Mixed2);
- P_photonMixed1.SetPtEtaPhiM( Pt_Mixed1, Y_Mixed1, Phi_Mixed1, 0.0);
- P_photonMixed2.SetPtEtaPhiM( Pt_Mixed2, Y_Mixed2, Phi_Mixed2, 0.0);
- Asymmetry = TMath::Abs((P_photonMixed1.E()-P_photonMixed2.E())/(P_photonMixed1.E()+P_photonMixed2.E()));
-
- if ( (P_photonMixed1.DeltaR(P_photonMixed2) > RelativeRCut) &&
- (Asymmetry < AsymmetryCut ) )
- {
- invariant_mass_mixed = (P_photonMixed1 + P_photonMixed2).M();
- h_Minv_lowpT_back->Fill(invariant_mass_mixed, (P_photonMixed1 + P_photonMixed2).Pt() );
- h_Minv_highpT_back->Fill(invariant_mass_mixed,(P_photonMixed1 + P_photonMixed2).Pt() );
- }
- }
-
-
- char outputname[80];
- sprintf(outputname,"%s.Minv",filename);
- TFile output(outputname,"recreate");
- h_Minv_lowpT->Write();
- h_Minv_highpT->Write();
- h_Minv_lowpT_back->Write();
- h_Minv_highpT_back->Write();
- h_Pseudoeta->Write();
- h_Pt->Write();
- h_Peta_Pt->Write();
- h_Phi->Write();
- h_Peta_Phi->Write();
- h_Dispersion->Write();
- h_Type->Write();
- h_Asymmetry->Write();
- h_DeltaR->Write();
-
- output.Close();
-}
-
-
-void AnaPtSpectrum(char * filename, Int_t NumberPerPtBin, Option_t * particle, Option_t * opt)
-{
-
- Int_t NumberOfPtBins = NumberPerPtBin;
- Float_t PtCalibration = 0.250;
-
- TFile * in = new TFile(filename);
-
- TH2F * h_Minv_pT = 0;
- TH2F * h_Minv_pT_back = 0;
- TH2F * frame = 0 ;
-
- if (strstr(opt,"low"))
- {
- h_Minv_pT = (TH2F *) in->Get("h_Minv_lowpT"); ;
- h_Minv_pT_back = (TH2F *) in->Get("h_Minv_lowpT_back");
- PtCalibration = 0.250;
- frame = new TH2F("PtSpectrumlow","Pt Spectrum low",10, 0.,10.,10,0.1,10000);
- }
- if (strstr(opt,"high"))
- {
- h_Minv_pT = (TH2F *) in->Get("h_Minv_highpT"); ;
- h_Minv_pT_back = (TH2F *) in->Get("h_Minv_highpT_back");
- PtCalibration = 2.5;
- frame = new TH2F("PtSpectrumhigh","Pt Spectrum high",10, 0.,100.,10,0.1,10000);
- }
-
- if ( h_Minv_pT == 0 )
- {
- printf(">>> Bad Option! \n");
- return;
- }
- Int_t Norma_1 = 100; Float_t Norma_minv_1 = 0.2;
- Int_t Norma_2 = 200; Float_t Norma_minv_2 = 0.4;
-
- Int_t Minv_1 = 46;
- Int_t Minv_2 = 76;
- if (strstr(particle,"eta"))
- {
- Minv_1 = 214;
- Minv_2 = 314;
- }
-
- if (strstr(particle,"norma"))
- {
- Minv_1 = 100;
- Minv_2 = 200;
- }
-
- Int_t NHistos = 40/NumberOfPtBins;
- Int_t iHistos;
-
- TH1D * signal = 0;
- TH1D * background = 0;
- TH1D * ratio = 0;
- TH1D * difference = 0;
-
- Float_t Pt[NHistos];
- Float_t PtError[NHistos];
- Float_t Nmesons[NHistos];
- Float_t NmesonsError[NHistos];
-
- Float_t Ntota, Nback, Norma, NormaError, Renorma;
-
- for(iHistos=0; iHistos<NHistos; iHistos++)
- {
- signal = h_Minv_pT->ProjectionX("signal", NumberOfPtBins*iHistos+1,NumberOfPtBins*(iHistos+1));
- background = h_Minv_pT_back->ProjectionX("background",NumberOfPtBins*iHistos+1,NumberOfPtBins*(iHistos+1));
-
- ratio = new TH1D(*signal);
- ratio->Sumw2();
- ratio->Add(background,-1.0);
- ratio->Divide(background);
- difference = new TH1D(*signal);
- difference->Sumw2();
- ratio->Fit("pol0","","",Norma_minv_1,Norma_minv_2);
- if (background->Integral(Norma_1,Norma_2) == 0)
- Renorma = 0.;
- else
- Renorma = signal->Integral(Norma_1,Norma_2)/background->Integral(Norma_1,Norma_2);
- difference->Add(background,(-1.)*Renorma);
-
-
- Ntota = signal->Integral(Minv_1,Minv_2);
- Nback = background->Integral(Minv_1,Minv_2);
- Norma = ratio->GetFunction("pol0")->GetParameter(0);
- if (Renorma == 0.)
- NormaError = 0.;
- else
- NormaError = ratio->GetFunction("pol0")->GetParError(0);
- printf("Ntotal %f Nback %f Norma %f and NormaError %f \n",Ntota, Nback, Norma, NormaError);
- printf("differencia is %f \n",difference->Integral(Minv_1,Minv_2));
- Nmesons[iHistos] = Ntota - Renorma * Nback;
- NmesonsError[iHistos] = TMath::Sqrt( Ntota + Nback*Renorma*Renorma + Nback*Nback*NormaError*NormaError );
- Pt[iHistos] = (iHistos+0.5)*NumberOfPtBins*PtCalibration;
- PtError[iHistos] = NumberOfPtBins*PtCalibration/2.;
-
- }
-
- char filenameout[80];
- sprintf(filenameout,"%s.PtSpectrum_%d_%s_%s",filename, NumberPerPtBin, particle, opt);
- TFile out(filenameout,"recreate");
- TGraphErrors * PtSpectrum = new TGraphErrors(NHistos, Pt, Nmesons, PtError, NmesonsError);
- PtSpectrum->SetName("PtSpectrum");
- PtSpectrum->Write();
- out.Close();
-
- frame->Draw();
- frame->SetStats(0);
- frame->SetXTitle("Neutral meson pT (GeV/c)");
- frame->SetYTitle("Number of neutral mesons per pT bin");
- PtSpectrum->SetMarkerStyle(27);
- PtSpectrum->Draw("P");
-
-
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff