Measurement of the Top Quark Mass Using the Template Method in the Lepton Plus Jets Channel with In Situ W ---> j j Calibration at CDF-II

摘要

We report an updated measurement of the top quark mass in the lepton plus jets channel of t1t events from p1p collisions at ps = 1.96 TeV. This measurement uses a dataset with integrated luminosity of 680 pb 1, containing 360 t1t candidates separated into four subsamples. A top quark mass is reconstructed for each event by using energy and momentum constraints on the top quark pair decay products. We also employ the reconstructed mass of hadronic W boson decays W jj to constrain in situ the largest systematic uncertainty of the top quark mass measurement: the jet energy scale. Monte Carlo templates of the reconstructed top quark and W boson mass are produced as a function of the true top quark mass and the jet energy scale. The distribution of reconstructed top quark and W boson mass in the data are compared to the Monte Carlo templates using a likelihood t to obtain: Mtop =173.4 (+)(-) 2.8 GeV/c2.