# 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 $t\bar{t}\to b\ell'^{+}\nu_{\ell'}\bar{b}\ell^{-}\bar{\nu}_{\ell}$ 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00123518
Contributor : Dominique Girod <>
Submitted on : Wednesday, January 10, 2007 - 10:05:20 AM
Last modification on : Wednesday, May 27, 2020 - 7:20:03 PM

### Citation

A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M.G. Albrow, et al.. Precision measurement of the top quark mass from dilepton events at CDF II. Physical Review D, American Physical Society, 2007, 75, pp.031105. ⟨10.1103/PhysRevD.75.031105⟩. ⟨in2p3-00123518⟩

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