void Full_GLBJP() {
	gSystem->Load("libRooFit");
	using namespace RooFit;
	
	TFile* f= new TFile("small.root","READ");
	TTree* t1= (TTree*)f->Get("ExTree");
	RooRealVar GLBJP_mass("GLBJP_mass","GLBJP_mass",9.5,0,20) ; 
	RooDataSet data("data","data",t1,GLBJP_mass) ;
	
	RooPlot* mframe = GLBJP_mass.frame() ; 
	data.plotOn(mframe,Binning(50)) ; 
	mframe->Draw();
}