Adding a macro to determine systematic errors on the momentum cut

diff --git a/PWG4/totEt/macros/hadEt/CorrPtCut.C b/PWG4/totEt/macros/hadEt/CorrPtCut.C
new file mode 100644 (file)
index 0000000..9e3b25d
--- /dev/null
+++ b/PWG4/totEt/macros/hadEt/CorrPtCut.C
@@ -0,0 +1,149 @@
+float mean=0;
+float highbound=0;
+float lowbound=0;
+
+TH1D *GetHisto(float ptcut = 0.15, char *name, char *filename, float etacut){
+  TFile *file = new TFile(filename);
+  TList *list = file->FindObject("out2");
+  //TH2F *allhad = ((TH2F*) out2->FindObject("EtSimulatedAllHadron"))->Clone("allhad");
+  TH2F *allhad = ((TH2F*) out2->FindObject("EtSimulatedChargedHadron"))->Clone("allhad");
+  TH2F *ptlow = ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingNoPt"))->Clone("ptlow");
+  TH2F *pthigh;
+  if(ptcut>0.14){//TPC cut off
+    (TH2F*)pthigh =(TH2F*) ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingPtTPCCut"))->Clone("pthigh");
+  }
+  else{
+    (TH2F*)pthigh =(TH2F*) ((TH2F*) out2->FindObject("EtSimulatedChargedHadronAssumingPtITSCut"))->Clone("pthigh");
+  }
+
+  int lowbin = allhad->GetXaxis()->FindBin(0.0);//make sure we don't accidentally get the wrong bin
+  int highbin = allhad->GetXaxis()->FindBin(ptcut);
+  int nbins = allhad->GetXaxis()->GetNbins();
+  cout<<"Projecting from "<<allhad->GetXaxis()->GetBinLowEdge(lowbin)<<" to "<<allhad->GetXaxis()->GetBinLowEdge(highbin+1)<<endl;
+  cout<<"Projecting from "<<allhad->GetXaxis()->GetBinLowEdge(lowbin)<<" to "<<allhad->GetXaxis()->GetBinLowEdge(nbins)<<endl;
+
+  //allhad->Sumw2();
+
+
+  TH1D *numerator = allhad->ProjectionY("name",lowbin,highbin);
+  TH1D *denominator = allhad->ProjectionY("denominator",lowbin,nbins);
+  TH1D *numeratorLow = ptlow->ProjectionY("nameLow",lowbin,highbin);
+  TH1D *denominatorLow = allhad->ProjectionY("denominatorLow",highbin,nbins);
+  denominatorLow->Add(ptlow);
+  TH1D *numeratorHigh = pthigh->ProjectionY("nameHigh",lowbin,highbin);
+  TH1D *denominatorHigh = allhad->ProjectionY("denominatorHigh",highbin,nbins);
+  denominatorHigh->Add(pthigh);
+
+  numerator->Divide(denominator);
+  numeratorLow->Divide(denominatorLow);
+  numeratorHigh->Divide(denominatorHigh);
+
+  TF1 *funcLow = new TF1("funcLow","[0]",-.7,.7);
+  funcLow->SetParameter(0,0.01);
+  numeratorLow->Fit(funcLow);
+  TF1 *func = new TF1("func","[0]",-.7,.7);
+  func->SetParameter(0,0.02);
+  numerator->Fit(func);
+  TF1 *funcHigh = new TF1("funcHigh","[0]",-.7,.7);
+  funcHigh->SetParameter(0,0.02);
+  numeratorHigh->Fit(funcHigh);
+
+  mean = 1.0-func->GetParameter(0);
+  lowbound = 1.0-funcHigh->GetParameter(0);
+  highbound = 1.0-funcLow->GetParameter(0);
+  cout<<"fpTcut = "<<mean<<","<<lowbound<<","<<highbound<<endl;
+  cout<<"1/fpTcut = "<<1.0/mean<<","<<1.0/lowbound<<","<<1.0/highbound<<endl;
+  //cout<<"fpTcut = "<<mean<<"-"<<mean-lowbound<<"+"<<highbound-mean<<endl;
+  cout<<Form("%2.5f_{+%2.5f}_{-%2.5f}",mean,highbound-mean,mean-lowbound)<<endl;
+  cout<<"1/fpTcut = "<<1.0/mean<<"+"<<1.0/lowbound-1.0/mean<<"-"<<1.0/mean-1.0/highbound<<endl;
+  numerator->SetYTitle("E_{T}^{had, p_{T}<cut-off}/E_{T}^{had, all p_{T}}");
+  numerator->GetYaxis()->SetTitleOffset(1.);
+  numerator->GetYaxis()->SetTitleSize(0.08);
+  numerator->GetYaxis()->SetLabelSize(0.05);
+  numerator->GetXaxis()->SetTitleSize(0.08);
+  numerator->GetXaxis()->SetLabelSize(0.05);
+  numerator->GetXaxis()->SetTitleOffset(.6);
+  //numerator->Rebin(2);
+  //numerator->Scale(0.5);
+  //numerator->Draw("e");
+  return numerator;
+
+}
+//Christine Nattrass, University of Tennessee at Knoxville
+//This macro is for calculating the correction for the pT cut-off and its systematic error
+//Uses the output of AliAnalysisTaskHadEt
+//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
+
+void CorrPtCut(char *prodname = "LHC10d4 PYTHIA D6T 7 TeV p+p", char *shortprodname = "LHC10d4", char *filename="Et.ESD.new.sim.LHC10d4.pp.merged.root"){
+
+  gStyle->SetOptTitle(0);
+  gStyle->SetOptStat(0);
+  gStyle->SetOptFit(0);
+  TCanvas *c = new TCanvas("c","c",500,400);
+  c->SetTopMargin(0.04);
+  c->SetRightMargin(0.04);
+  c->SetLeftMargin(0.181452);
+  c->SetBottomMargin(0.134409);
+  c->SetBorderSize(0);
+  c->SetFillColor(0);
+  c->SetFillColor(0);
+  c->SetBorderMode(0);
+  c->SetFrameFillColor(0);
+  c->SetFrameBorderMode(0);
+  float etacut = 0.7;
+  TH1D *High = GetHisto(0.15-.001,"High",filename,etacut);
+  float tpcHigh=highbound;
+  float tpcLow=lowbound;
+  float x1 = High->GetXaxis()->GetBinLowEdge(1);
+  TBox *tpcBox = new TBox(-x1*.99,1.0-tpcLow,x1*.99,1.0-tpcHigh);
+  tpcBox->SetFillColor(5);
+  tpcBox->SetLineColor(0);
+  tpcBox->SetFillStyle(1001);
+  TH1D *Low = GetHisto(0.1-.001,"Low",filename,etacut);
+  float itsHigh=highbound;
+  float itsLow=lowbound;
+  float x = Low->GetXaxis()->GetBinLowEdge(1);
+  TBox *itsBox = new TBox(-x*.99,1.0-itsLow,x*.99,1.0-itsHigh);
+  itsBox->SetFillColor(5);
+  itsBox->SetLineColor(0);
+  itsBox->SetFillStyle(1001);
+  TH1D *Lowest = GetHisto(0.05-.001,"Lowest",filename,etacut);
+  TF1 *funcLow = new TF1("funcLow","[0]",-.7,.7);
+  funcLow->SetParameter(0,0.01);
+  Low->Fit(funcLow);
+  TF1 *funcHigh = new TF1("funcHigh","[0]",-.7,.7);
+  funcHigh->SetParameter(0,0.02);
+  High->Fit(funcLow);
+  High->SetMaximum(0.04);
+  High->SetMinimum(0.0);
+  High->SetMarkerColor(2);
+  Low->SetMarkerColor(4);
+  High->SetLineColor(2);
+  Low->SetLineColor(4);
+  High->SetMinimum(0.0);
+  High->SetMarkerStyle(20);
+  Low->SetMarkerStyle(21);
+  Lowest->SetMarkerStyle(22);
+  High->Draw();
+  tpcBox->Draw("f");
+  High->Draw("same");
+  itsBox->Draw("f");
+  //return;
+  Low->Draw("same");
+  //Lowest->Draw("same");
+  TLatex *tex = new TLatex(-0.723444,0.0373593,prodname);
+  tex->SetTextSize(0.0537634);
+  tex->Draw();
+  TLegend *leg = new TLegend(0.217742,0.696237,0.477823,0.873656);
+  leg->AddEntry(High,"p_{T} cut-off = 0.15 GeV/c");
+  leg->AddEntry(Low,"p_{T} cut-off = 0.1 GeV/c");
+  //leg->AddEntry(Lowest,"p_{T} cut-off = 0.05 GeV/c");
+  leg->SetFillStyle(0);
+  leg->SetFillColor(0);
+  leg->SetBorderSize(0);
+  leg->SetTextSize(0.0537634);
+  leg->Draw();
+  c->SaveAs(Form("pics/%s/fptcut.eps",shortprodname));
+  c->SaveAs(Form("pics/%s/fptcut.png",shortprodname));
+  c->SaveAs(Form("pics/%s/fptcut.pdf",shortprodname));
+}