{
leg=new TLegend(0.6,0.7,0.89,0.89);


TFile *_file = TFile::Open("ZHH-BP3-50k_1.5TeV.root");
leg->AddEntry(Zmass,"ZHH","LP");
Zmass->SetLineColor(2);
Zmass->SetLineWidth(3);
Zmass->SetLineStyle(1);
//Zmass->SetFillColor(2);
Double_t scale=1./Zmass->Integral();
Zmass->Scale(scale);
Zmass->GetXaxis()->SetTitle("#bf{m_{H} [GeV]}");
Zmass->GetYaxis()->SetTitle("#bf{Normalized to 1}");
Zmass->GetXaxis()->CenterTitle(true);
Zmass->GetYaxis()->CenterTitle(true);
Zmass->Draw("same");

_file = TFile::Open("ZAA-BP3-50k_1.5TeV.root");
leg->AddEntry(Zmass,"ZAA","LP");
Zmass->SetLineColor(3);
Zmass->SetLineWidth(3);
Zmass->SetLineStyle(2);
//Zmass->SetFillColor(3);
//Double_t scale=1./Zmass->Integral();
Zmass->Scale(scale);
Zmass->Draw("same");

_file = TFile::Open("Zhh-BP3-50k_1.5TeV.root");
leg->AddEntry(Zmass,"Zhh","LP");
Zmass->SetLineColor(4);
Zmass->SetLineWidth(3);
Zmass->SetLineStyle(3);
//Zmass->SetFillColor(4);
//Double_t scale=1./Zmass->Integral();
Zmass->Scale(scale);
Zmass->Draw("same");



//mg->GetXaxis()->SetLimits(2,14);
//mg->GetYaxis()->SetLimits(0,550);


gStyle->SetOptStat(0);
leg->SetLineWidth(0);
leg->SetFillStyle(0);
leg->SetMargin(0.2);
leg->Draw();

}