TFile f("TrkValidation.root")
f.cd("FitterValidation")
TTree *ttree=OutputTrack
ttree->Draw("sqrt(TrackMomentumX**2+TrackMomentumY**2)>>pt(100,10000.,180000)")
TH1F *pt=(TH1F*)gROOT->FindObject("pt")
TFile f2("TrkValidationCorr.root")
f2.cd("FitterValidation")
TTree *ttree2=OutputTrack
ttree2->Draw("sqrt(TrackMomentumX**2+TrackMomentumY**2)>>pt2(100,10000.,180000)")
pt->Draw("SAME")