Measurement of the Jet Energy Scale in the CMS experiment ... - IIHE

CHAPTER 5: Estimating of the Jet Energy Scale Calibration Factor 121#Events605040tt+jets semi-ele (146.9 entries)tt+jets other (23.4 entries)SingleTop+jets (7.5 entries)Z+jets (3.5 entries)W+jets (15.1 entries)QCD (4.6 entries)Data (36.1 pb-1) (176.0 entries)#Events353025tt+jets semi-ele (146.9 entries)tt+jets other (23.4 entries)SingleTop+jets (7.5 entries)Z+jets (3.5 entries)W+jets (15.1 entries)QCD (4.6 entries)Data (36.1 pb-1) (176.0 entries)30202015101050 50 100 150 200 250 300m W (GeV)0 100 200 300 400 500 600(GeV)m topFigure 5.31: The mass distributions of the W boson (left) and the top quark (right)using the four-vectors returned by the MVA method. The collision data events areoverimposed to the simulation for comparison purpose.∆E b1.41.31.21.110.90.80.7Data_143827_440_6070423750.60.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.40∆E lFigure 5.32: The kinematic fit output for a typical collision data event. The thirddimension contains the probability of the kinematic fit P KinFit (∆E l , ∆E b ).0.90.80.70.60.50.40.30.20.1#Events200180160140120tt+jets semi-ele (146.9 entries)tt+jets other (23.4 entries)SingleTop+jets (7.5 entries)Z+jets (3.5 entries)W+jets (15.1 entries)QCD (4.6 entries)Data (36.1 pb-1) (176.0 entries)#Events21010100806014020-1100 0.2 0.4 0.6 0.8 1KinFit Probability without corrections0 0.2 0.4 0.6 0.8 1KinFit Probability without correctionsFigure 5.33: The distribution of the kinematic fit probability when no correction isapplied shown in normal scale (left) and logarithmic scale (right). The collision dataevents are overimposed to the simulation for comparison purpose.