PWGLF/totEt/macros/hadEt/CorrPtCut.C

   1 //Christine Nattrass, University of Tennessee at Knoxville
   2 //This macro is for calculating the correction for the pT cut-off and its systematic error
   3 //Uses the output of AliAnalysisTaskHadEt
   4 //This is not actually what gets used in the correction class AliAnalysisHadEtCorrections - that is done in the macro GetCorrections.C - but this is useful for making plots and playing around with different options
   5
   6 float mean=0;
   7 float highbound=0;
   8 float lowbound=0;
   9 float syserr = 0;
  10
  11 TH1D *GetHisto(float ptcut = 0.15, char *name, char *filename, float etacut){
  12   TFile *file = new TFile(filename);
  13   TList *list = file->FindObject("out2");
  14   //TH2F *allhad = ((TH2F*) out2->FindObject("EtSimulatedAllHadron"))->Clone("allhad");
  15   TH2F *allhad = ((TH2F*) out2->FindObject("EtSimulatedChargedHadron"))->Clone("allhad");
  16   TH2F *ptlow = ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingNoPt"))->Clone("ptlow");
  17   TH2F *pthigh;
  18   if(ptcut>0.14){//TPC cut off
  19     (TH2F*)pthigh =(TH2F*) ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingPtTPCCut"))->Clone("pthigh");
  20   }
  21   else{
  22     (TH2F*)pthigh =(TH2F*) ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingPtITSCut"))->Clone("pthigh");
  23   }
  24
  25   int lowbin = allhad->GetXaxis()->FindBin(0.0);//make sure we don't accidentally get the wrong bin
  26   int highbin = allhad->GetXaxis()->FindBin(ptcut);
  27   int nbins = allhad->GetXaxis()->GetNbins();
  28   cout<<"Projecting from "<<allhad->GetXaxis()->GetBinLowEdge(lowbin)<<" to "<<allhad->GetXaxis()->GetBinLowEdge(highbin+1)<<endl;
  29   cout<<"Projecting from "<<allhad->GetXaxis()->GetBinLowEdge(lowbin)<<" to "<<allhad->GetXaxis()->GetBinLowEdge(nbins)<<endl;
  30
  31   //allhad->Sumw2();
  32
  33
  34   TH1D *numerator = allhad->ProjectionY("name",lowbin,highbin);
  35   TH1D *denominator = allhad->ProjectionY("denominator",lowbin,nbins);
  36   TH1D *numeratorLow = ptlow->ProjectionY("nameLow",lowbin,highbin);
  37   TH1D *denominatorLow = allhad->ProjectionY("denominatorLow",highbin,nbins);
  38   denominatorLow->Add(ptlow);
  39   TH1D *numeratorHigh = pthigh->ProjectionY("nameHigh",lowbin,highbin);
  40   TH1D *denominatorHigh = allhad->ProjectionY("denominatorHigh",highbin,nbins);
  41   denominatorHigh->Add(pthigh);
  42
  43   numerator->Divide(denominator);
  44   numeratorLow->Divide(denominatorLow);
  45   numeratorHigh->Divide(denominatorHigh);
  46
  47   TF1 *funcLow = new TF1("funcLow","[0]",-.7,.7);
  48   funcLow->SetParameter(0,0.01);
  49   numeratorLow->Fit(funcLow);
  50   TF1 *func = new TF1("func","[0]",-.7,.7);
  51   func->SetParameter(0,0.02);
  52   numerator->Fit(func);
  53   TF1 *funcHigh = new TF1("funcHigh","[0]",-.7,.7);
  54   funcHigh->SetParameter(0,0.02);
  55   numeratorHigh->Fit(funcHigh);
  56
  57   mean = 1.0-func->GetParameter(0);
  58   lowbound = 1.0-funcHigh->GetParameter(0);
  59   highbound = 1.0-funcLow->GetParameter(0);
  60   cout<<"fpTcut = "<<mean<<","<<lowbound<<","<<highbound<<endl;
  61   cout<<"1/fpTcut = "<<1.0/mean<<","<<1.0/lowbound<<","<<1.0/highbound<<endl;
  62   //cout<<"fpTcut = "<<mean<<"-"<<mean-lowbound<<"+"<<highbound-mean<<endl;
  63   syserr = highbound-mean;
  64   if(mean-lowbound>syserr) syserr = mean-lowbound;
  65   cout<<Form("%2.4f^{+%2.4f}_{-%2.4f}",mean,highbound-mean,mean-lowbound)<<endl;
  66   cout<<"latex here ";
  67   cout<<Form("%2.4f \\pm %2.4f",mean,syserr)<<endl;
  68   cout<<"1/fpTcut = "<<1.0/mean<<"+"<<1.0/lowbound-1.0/mean<<"-"<<1.0/mean-1.0/highbound<<endl;
  69   numerator->SetYTitle("E_{T}^{had, p_{T}<cut-off}/E_{T}^{had, all p_{T}}");
  70   numerator->GetYaxis()->SetTitleOffset(1.);
  71   numerator->GetYaxis()->SetTitleSize(0.08);
  72   numerator->GetYaxis()->SetLabelSize(0.05);
  73   numerator->GetXaxis()->SetTitleSize(0.08);
  74   numerator->GetXaxis()->SetLabelSize(0.05);
  75   numerator->GetXaxis()->SetTitleOffset(.6);
  76   //numerator->Rebin(2);
  77   //numerator->Scale(0.5);
  78   //numerator->Draw("e");
  79   return numerator;
  80
  81 }
  82 void CorrPtCut(char *prodname = "LHC10d4 PYTHIA D6T 7 TeV p+p", char *shortprodname = "LHC10d4", char *filename="Et.ESD.new.sim.LHC10d4.pp.merged.root"){
  83
  84   gStyle->SetOptTitle(0);
  85   gStyle->SetOptStat(0);
  86   gStyle->SetOptFit(0);
  87   TCanvas *c = new TCanvas("c","c",500,400);
  88   c->SetTopMargin(0.04);
  89   c->SetRightMargin(0.04);
  90   c->SetLeftMargin(0.181452);
  91   c->SetBottomMargin(0.134409);
  92   c->SetBorderSize(0);
  93   c->SetFillColor(0);
  94   c->SetFillColor(0);
  95   c->SetBorderMode(0);
  96   c->SetFrameFillColor(0);
  97   c->SetFrameBorderMode(0);
  98   float etacut = 0.7;
  99   cout<<"Pt cut = 150 MeV/c"<<endl;
 100   TH1D *High = GetHisto(0.15-.001,"High",filename,etacut);
 101   float tpcHigh=highbound;
 102   float tpcLow=lowbound;
 103   float tpcsyserr = syserr;
 104   float tpcmean = mean;
 105   float x1 = High->GetXaxis()->GetBinLowEdge(1);
 106   //TBox *tpcBox = new TBox(-x1*.99,1.0-tpcLow,x1*.99,1.0-tpcHigh);
 107   TBox *tpcBox = new TBox(-x1*.99,1.0-(mean-syserr),x1*.99,1.0-(mean+syserr));
 108   tpcBox->SetFillColor(5);
 109   tpcBox->SetLineColor(0);
 110   tpcBox->SetFillStyle(1001);
 111   cout<<"Pt cut = 100 MeV/c"<<endl;
 112   TH1D *Low = GetHisto(0.1-.001,"Low",filename,etacut);
 113   float itsHigh=highbound;
 114   float itsLow=lowbound;
 115   float itssyserr = syserr;
 116   float itsmean = mean;
 117
 118   cout<<Form("dataset & %2.4f \\pm %2.4f &  %2.4f \\pm %2.4f \\",itsmean,itssyserr,tpcmean,tpcsyserr)<<endl;
 119   float x = Low->GetXaxis()->GetBinLowEdge(1);
 120   //TBox *itsBox = new TBox(-x*.99,1.0-itsLow,x*.99,1.0-itsHigh);
 121   TBox *itsBox = new TBox(-x1*.99,1.0-(mean-syserr),x1*.99,1.0-(mean+syserr));
 122   itsBox->SetFillColor(5);
 123   itsBox->SetLineColor(0);
 124   itsBox->SetFillStyle(1001);
 125   cout<<"Pt cut = 50 MeV/c"<<endl;
 126   TH1D *Lowest = GetHisto(0.05-.001,"Lowest",filename,etacut);
 127   TF1 *funcLow = new TF1("funcLow","[0]",-.7,.7);
 128   funcLow->SetParameter(0,0.01);
 129   Low->Fit(funcLow);
 130   TF1 *funcHigh = new TF1("funcHigh","[0]",-.7,.7);
 131   funcHigh->SetParameter(0,0.02);
 132   High->Fit(funcLow);
 133   High->SetMaximum(0.06);
 134   High->SetMinimum(0.0);
 135   High->SetMarkerColor(2);
 136   Low->SetMarkerColor(4);
 137   High->SetLineColor(2);
 138   Low->SetLineColor(4);
 139   High->SetMinimum(0.0);
 140   High->SetMarkerStyle(20);
 141   Low->SetMarkerStyle(21);
 142   Lowest->SetMarkerStyle(22);
 143   High->Draw();
 144   tpcBox->Draw("f");
 145   High->Draw("same");
 146   itsBox->Draw("f");
 147   //return;
 148   Low->Draw("same");
 149   //Lowest->Draw("same");
 150   TLatex *tex = new TLatex(-0.723444,0.0373593+0.019,prodname);
 151   tex->SetTextSize(0.0537634);
 152   tex->Draw();
 153   TLegend *leg = new TLegend(0.217742,0.696237,0.477823,0.873656);
 154   leg->AddEntry(High,"p_{T} cut-off = 0.15 GeV/c");
 155   leg->AddEntry(Low,"p_{T} cut-off = 0.1 GeV/c");
 156   //leg->AddEntry(Lowest,"p_{T} cut-off = 0.05 GeV/c");
 157   leg->SetFillStyle(0);
 158   leg->SetFillColor(0);
 159   leg->SetBorderSize(0);
 160   leg->SetTextSize(0.0537634);
 161   leg->Draw();
 162   c->SaveAs(Form("pics/%s/fptcut.eps",shortprodname));
 163   c->SaveAs(Form("pics/%s/fptcut.png",shortprodname));
 164   c->SaveAs(Form("pics/%s/fptcut.pdf",shortprodname));
 165 }