Precision measurement of the top quark mass from dilepton events at CDF II

Abstract

We report a measurement of the top quark mass, M_t, in the dilepton decay channel of $t\bar{t}\to b{\ell }^{\prime +}{\nu }_{{\ell }^{\prime }}\bar{b}{\ell }^{-}{\bar{\nu }}_{\ell }$ using an integrated luminosity of 1.0 fb^{-1} of p\bar{p} collisions collected with the CDF II detector. We apply a method that convolutes a leading-order matrix element with detector resolution functions to form event-by-event likelihoods; we have enhanced the leading-order description to describe the effects of initial-state radiation. The joint likelihood is the product of the likelihoods from 78 candidate events in this sample, which yields a measurement of M_{t} = 164.5 \pm 3.9(\textrm{stat.}) \pm 3.9(\textrm{syst.}) \mathrm{GeV}/c^2, the most precise measurement of M_t in the dilepton channel.

7 pages, 2 figures, version includes changes made prior to publication by journal

References in corpus (3)

• Top Quark Mass Measurement from Dilepton Events at CDF II
• Measurement of the Top Quark Mass using Template Methods on Dilepton Events in Proton-Antiproton Collisions at sqrt(s)=1.96 TeV
• Top Quark Mass Measurement from Dilepton Events at CDF II with the Matrix-Element Method

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