[u/mrichter/AliRoot.git] / PHOS / AnaPhotons_v1.C

//===============================================================
// 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_DeltaR   = new TH1F("h_DeltaR","Delta R",400,0,4);
  TH1F * h_Asymmetry= new TH1F("h_Asymmetry","Asymmetry",400, -2., 2.);

  AliPHOSGetter * RecData = AliPHOSGetter::GetInstance(filename,"Gines")  ;
 
  AliPHOSRecParticle * RecParticle1;
  AliPHOSRecParticle * RecParticle2;
 

  Float_t RelativeRCut = 0.0001 ; 
  Float_t AsymmetryCut = 0.7 ;
  Float_t Asymmetry;

  Int_t iEvent, iRecParticle1, iRecParticle2;
  Int_t nRecParticle;
  Float_t invariant_mass, invariant_mass_mixed;
  TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ;
  Float_t average_multiplicity = 0.;

  for(iEvent=0; iEvent<gAlice->TreeE()->GetEntries(); iEvent++)
    //  for(iEvent=0; iEvent<1000; iEvent++)
    {
      //     if (iEvent==2) gObjectTable->Print();
      //if (iEvent==15) gObjectTable->Print();
      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);

	      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++)
    {
      //      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_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 = 56;
  Int_t Minv_2 = 76;
  if (strstr(particle,"eta"))
    {
      Minv_1 = 234;
      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));
      //signal->Rebin();
      //background->Rebin();
      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); 
       
      //ratio->Draw();
      //      background->Draw("same");
      //     difference->Draw();

      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.; 
      //   ratio->Delete("");
      //difference->Delete("");
    }
  // in->Close();


  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");

}
Commit	Line	Data
f09fd69e	1	//===============================================================
	2	// In this Macro (which can (must) be compilated), you will find all the
	3	// analysis functions to build photon spectrum, invariant mass
	4	// spectrum of photon pairs and combinatorial background calculations
	5	// in ALICE electromagnetic calorimeter
	6	// Author: Gines MARTINEZ, Subatech, 15 june 2001
	7	//==============================================================
	8	#include "TH2.h"
	9	#include "TH1.h"
	10	#include "TFile.h"
079e348c	11	#include "TTree.h"
f09fd69e	12	#include "TRandom.h"
f09fd69e	13	#include "TObjectTable.h"
079e348c	14	#include "AliRun.h"
079e348c	15	#include "AliPHOSGetter.h"
f09fd69e	16	#include "AliPHOSRecParticle.h"
	17	#include "TLorentzVector.h"
	18	#include "TGraphErrors.h"
	19	#include "TF1.h"
	20
	21	TObjectTable * gObjectTable;
	22	TRandom * gRandom;
079e348c	23	AliRun * gAlice;
f09fd69e	24
	25
	26	void AnaMinv(char * filename)
	27	{
	28	TH2F * h_Minv_lowpT = new TH2F("h_Minv_lowpT","Minv vs pT low",500,0.0,1.0,40,0.,10.);
	29	TH2F * h_Minv_highpT = new TH2F("h_Minv_highpT","Minv vs pT high",500,0.0,1.0,50,0.,100.);
	30	TH2F * h_Minv_lowpT_back = new TH2F("h_Minv_lowpT_back","Minv vs pT low back",500,0.0,1.0,40,0.,10.);
	31	TH2F * h_Minv_highpT_back = new TH2F("h_Minv_highpT_back","Minv vs pT high back",500,0.0,1.0,50,0.,100.);
	32
	33
	34	TH1F * h_Pseudoeta = new TH1F("h_Pseudoeta","Pseudoeta photons",500,-1.0,1.0);
	35	TH1F * h_Pt = new TH1F("h_Pt","Pt photons",400,0.,10.);
	36	TH2F * h_Peta_Pt = new TH2F("h_Peta_Pt","Pseudo vs pT",40,0.,10.,50,-1.0,1.0);
	37	TH1F * h_Phi = new TH1F("h_Phi","Phi photons",400,-4.,4.);
	38	TH2F * h_Peta_Phi = new TH2F("h_Peta_Phi","Pseudo vs Phi",200,-4,4,200,-1.0,1.0);
	39
	40	TH1F * h_DeltaR = new TH1F("h_DeltaR","Delta R",400,0,4);
	41	TH1F * h_Asymmetry= new TH1F("h_Asymmetry","Asymmetry",400, -2., 2.);
	42
079e348c	43	AliPHOSGetter * RecData = AliPHOSGetter::GetInstance(filename,"Gines") ;
f09fd69e	44
	45	AliPHOSRecParticle * RecParticle1;
	46	AliPHOSRecParticle * RecParticle2;
	47
	48
	49	Float_t RelativeRCut = 0.0001 ;
	50	Float_t AsymmetryCut = 0.7 ;
	51	Float_t Asymmetry;
	52
	53	Int_t iEvent, iRecParticle1, iRecParticle2;
	54	Int_t nRecParticle;
	55	Float_t invariant_mass, invariant_mass_mixed;
	56	TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ;
	57	Float_t average_multiplicity = 0.;
	58
079e348c	59	for(iEvent=0; iEvent<gAlice->TreeE()->GetEntries(); iEvent++)
f09fd69e	60	// for(iEvent=0; iEvent<1000; iEvent++)
	61	{
	62	// if (iEvent==2) gObjectTable->Print();
	63	//if (iEvent==15) gObjectTable->Print();
079e348c	64	RecData->Event(iEvent);
f09fd69e	65	printf(">>> Event %d \n",iEvent);
079e348c	66	nRecParticle=RecData->NRecParticles();
079e348c	67	average_multiplicity += ((Float_t) (nRecParticle) ) / ( (Float_t)gAlice->TreeE()->GetEntries() ) ;
f09fd69e	68	// Construction de la masse invariante des pairs
	69	if (nRecParticle > 1)
	70	{
	71	for(iRecParticle1=0; iRecParticle1<nRecParticle; iRecParticle1++)
	72	{
079e348c	73	RecParticle1 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle1);
f09fd69e	74	RecParticle1->Momentum(P_photon1);
	75
	76	h_Pseudoeta->Fill(P_photon1.PseudoRapidity());
	77	h_Pt->Fill(P_photon1.Pt());
	78	h_Phi->Fill(P_photon1.Phi());
	79	h_Peta_Pt->Fill(P_photon1.Pt(), P_photon1.PseudoRapidity());
	80	h_Peta_Phi->Fill(P_photon1.Phi(), P_photon1.PseudoRapidity() );
	81
	82	for(iRecParticle2=iRecParticle1+1; iRecParticle2<nRecParticle; iRecParticle2++)
	83	{
079e348c	84	RecParticle2 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle2);
f09fd69e	85	RecParticle2->Momentum(P_photon2);
	86	Asymmetry = TMath::Abs((P_photon1.E()-P_photon2.E())/(P_photon1.E()+P_photon2.E()));
	87	if ( (P_photon1 != P_photon2) &&
	88	(P_photon1.DeltaR(P_photon2) > RelativeRCut) &&
	89	(Asymmetry < AsymmetryCut) )
	90	{
	91	h_DeltaR->Fill(P_photon1.DeltaR(P_photon2));
	92	h_Asymmetry->Fill( Asymmetry );
	93
	94	// printf("A. p1 es %f \n",P_photon1->E());
	95	invariant_mass = (P_photon1 + P_photon2).M();
	96	// printf("B. p1 es %f \n",P_photon1->E());
	97	h_Minv_lowpT->Fill(invariant_mass, (P_photon1 + P_photon2).Pt() );
	98	h_Minv_highpT->Fill(invariant_mass,(P_photon1 + P_photon2).Pt() );
	99	}
	100	}
	101	}
	102	}
	103	}
	104	printf(">>> Average Multiplicity is %f \n",average_multiplicity);
079e348c	105	Int_t Background = (Int_t) (gAlice->TreeE()->GetEntries() * average_multiplicity * (average_multiplicity-1.)/2.) ;
f09fd69e	106	printf(">>> Background is %d \n",Background);
	107
	108	Double_t Pt_Mixed1, Pt_Mixed2;
	109	Double_t Y_Mixed1, Y_Mixed2;
	110	Double_t Phi_Mixed1, Phi_Mixed2;
	111
	112	for(iEvent=0; iEvent<Background; iEvent++)
	113	{
	114	// printf(">>> Background Event %d \n",iEvent);
	115	Pt_Mixed1 = h_Pt->GetRandom();
	116	Pt_Mixed2 = h_Pt->GetRandom();
	117	h_Peta_Phi->GetRandom2(Phi_Mixed1, Y_Mixed1);
	118	h_Peta_Phi->GetRandom2(Phi_Mixed2, Y_Mixed2);
	119	P_photonMixed1.SetPtEtaPhiM( Pt_Mixed1, Y_Mixed1, Phi_Mixed1, 0.0);
	120	P_photonMixed2.SetPtEtaPhiM( Pt_Mixed2, Y_Mixed2, Phi_Mixed2, 0.0);
	121	Asymmetry = TMath::Abs((P_photonMixed1.E()-P_photonMixed2.E())/(P_photonMixed1.E()+P_photonMixed2.E()));
	122
	123	if ( (P_photonMixed1.DeltaR(P_photonMixed2) > RelativeRCut) &&
	124	(Asymmetry < AsymmetryCut ) )
	125	{
	126	invariant_mass_mixed = (P_photonMixed1 + P_photonMixed2).M();
	127	h_Minv_lowpT_back->Fill(invariant_mass_mixed, (P_photonMixed1 + P_photonMixed2).Pt() );
	128	h_Minv_highpT_back->Fill(invariant_mass_mixed,(P_photonMixed1 + P_photonMixed2).Pt() );
	129	}
	130	}
	131
	132
	133	char outputname[80];
	134	sprintf(outputname,"%s.Minv",filename);
	135	TFile output(outputname,"recreate");
	136	h_Minv_lowpT->Write();
	137	h_Minv_highpT->Write();
	138	h_Minv_lowpT_back->Write();
	139	h_Minv_highpT_back->Write();
	140	h_Pseudoeta->Write();
	141	h_Pt->Write();
	142	h_Peta_Pt->Write();
	143	h_Phi->Write();
	144	h_Peta_Phi->Write();
	145	h_Asymmetry->Write();
	146	h_DeltaR->Write();
	147
	148	output.Close();
	149	}
	150
	151
	152	void AnaPtSpectrum(char * filename, Int_t NumberPerPtBin, Option_t * particle, Option_t * opt)
	153	{
	154
	155	Int_t NumberOfPtBins = NumberPerPtBin;
	156	Float_t PtCalibration = 0.250;
	157
	158	TFile * in = new TFile(filename);
	159
	160	TH2F * h_Minv_pT = 0;
	161	TH2F * h_Minv_pT_back = 0;
	162	TH2F * frame = 0 ;
	163
	164	if (strstr(opt,"low"))
	165	{
	166	h_Minv_pT = (TH2F *) in->Get("h_Minv_lowpT"); ;
	167	h_Minv_pT_back = (TH2F *) in->Get("h_Minv_lowpT_back");
	168	PtCalibration = 0.250;
	169	frame = new TH2F("PtSpectrumlow","Pt Spectrum low",10, 0.,10.,10,0.1,10000);
170	}
171	if (strstr(opt,"high"))
172	{
173	h_Minv_pT = (TH2F *) in->Get("h_Minv_highpT"); ;
174	h_Minv_pT_back = (TH2F *) in->Get("h_Minv_highpT_back");
175	PtCalibration = 2.5;
176	frame = new TH2F("PtSpectrumhigh","Pt Spectrum high",10, 0.,100.,10,0.1,10000);
177	}
178
179	if ( h_Minv_pT == 0 )
180	{
181	printf(">>> Bad Option! \n");
182	return;
183	}
184	Int_t Norma_1 = 100; Float_t Norma_minv_1 = 0.2;
185	Int_t Norma_2 = 200; Float_t Norma_minv_2 = 0.4;
186
187	Int_t Minv_1 = 56;
188	Int_t Minv_2 = 76;
189	if (strstr(particle,"eta"))
190	{
191	Minv_1 = 234;
192	Minv_2 = 314;
193	}
194
195	if (strstr(particle,"norma"))
196	{
197	Minv_1 = 100;
198	Minv_2 = 200;
199	}
200
201	Int_t NHistos = 40/NumberOfPtBins;
202	Int_t iHistos;
203
204	TH1D * signal = 0;
205	TH1D * background = 0;
206	TH1D * ratio = 0;
207	TH1D * difference = 0;
208
209	Float_t Pt[NHistos];
210	Float_t PtError[NHistos];
211	Float_t Nmesons[NHistos];
212	Float_t NmesonsError[NHistos];
213
214	Float_t Ntota, Nback, Norma, NormaError, Renorma;
215
216	for(iHistos=0; iHistos<NHistos; iHistos++)
217	{
218	signal = h_Minv_pT->ProjectionX("signal", NumberOfPtBinsiHistos+1,NumberOfPtBins(iHistos+1));
219	background = h_Minv_pT_back->ProjectionX("background",NumberOfPtBinsiHistos+1,NumberOfPtBins(iHistos+1));
220	//signal->Rebin();
221	//background->Rebin();
222	ratio = new TH1D(*signal);
223	ratio->Sumw2();
224	ratio->Add(background,-1.0);
225	ratio->Divide(background);
226	difference = new TH1D(*signal);
227	difference->Sumw2();
228	ratio->Fit("pol0","","",Norma_minv_1,Norma_minv_2);
229	if (background->Integral(Norma_1,Norma_2) == 0)
230	Renorma = 0.;
231	else
232	Renorma = signal->Integral(Norma_1,Norma_2)/background->Integral(Norma_1,Norma_2);
233	difference->Add(background,(-1.)*Renorma);
234
235	//ratio->Draw();
236	// background->Draw("same");
237	// difference->Draw();
238
239	Ntota = signal->Integral(Minv_1,Minv_2);
240	Nback = background->Integral(Minv_1,Minv_2);
241	Norma = ratio->GetFunction("pol0")->GetParameter(0);
242	if (Renorma == 0.)
243	NormaError = 0.;
244	else
245	NormaError = ratio->GetFunction("pol0")->GetParError(0);
246	printf("Ntotal %f Nback %f Norma %f and NormaError %f \n",Ntota, Nback, Norma, NormaError);
247	printf("differencia is %f \n",difference->Integral(Minv_1,Minv_2));
248	Nmesons[iHistos] = Ntota - Renorma * Nback;
249	NmesonsError[iHistos] = TMath::Sqrt( Ntota + NbackRenormaRenorma + NbackNbackNormaError*NormaError );
250	Pt[iHistos] = (iHistos+0.5)NumberOfPtBinsPtCalibration;
251	PtError[iHistos] = NumberOfPtBins*PtCalibration/2.;
252	// ratio->Delete("");
253	//difference->Delete("");
254	}
255	// in->Close();
256
257
258	char filenameout[80];
259	sprintf(filenameout,"%s.PtSpectrum_%d_%s_%s",filename, NumberPerPtBin, particle, opt);
260	TFile out(filenameout,"recreate");
261	TGraphErrors * PtSpectrum = new TGraphErrors(NHistos, Pt, Nmesons, PtError, NmesonsError);
262	PtSpectrum->SetName("PtSpectrum");
263	PtSpectrum->Write();
264	out.Close();
265
266	frame->Draw();
267	frame->SetStats(0);
268	frame->SetXTitle("Neutral meson pT (GeV/c)");
269	frame->SetYTitle("Number of neutral mesons per pT bin");
270	PtSpectrum->SetMarkerStyle(27);
271	PtSpectrum->Draw("P");
272
273	}