We describe a measurement of the top quark mass using events with
two charged leptons collected by the CDF II detector from p anti-p collisions
with s**(1/2) = 1.96 TeV at the Fermilab Tevatron. The likelihood in top mass
is calculated for each event by convoluting the leading order matrix element
describing qq-bar --> tt-bar --> b l nu_l b-bar l' nu_l, with detector
resolution functions. The presence of background events in the data sample
is modeled using similar calculations involving the matrix elements for
major background processes. In a data sample with integrated luminosity of
340 pb-1, we observe 33 candidate events and measure M_top = 165.2 +/-
6.1(stat.) +/- 3.4(syst.) GeV/c2. This measurement represents the first
application of this method to events with two charged leptons and is the
most precise single measurement of the top quark mass in this channel.
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Updated: Wednesday, 2006 December 20 13:17:12 CST automatically from input from Carol Picciolo