We describe a measurement of the top quark mass from events
produced in p anti-p collisions at a center-of-mass energy of 1.96 TeV, using
the Collider Detector at Fermilab. We identify tt-bar candidates where both
W bosons from the top quarks decay into leptons (e mu, mu nu, or tau nu)
from a data sample of 360 pb-1. The top quark mass is reconstructed in
each event separately by three different methods, which draw upon simulated
distributions of the neutrino pseudorapi+dity, tt-bar longitudinal momentum,
or neutrino azimuthal angle in order to extract probability distributions
for the top quark mass. For each method, representative mass distributions,
or templates, are constructed from simulated samples of signal and
background events, and parametrized templates is then performed on the data
sample masses in order to derive a final top quark mass. Combining the
three template methods, taking into account correlations in their
statistical and systematic uncertainties, results in a top quark mass
measurement of 170.1 +/- 6.0 (stat.) +/- 4.1 (syst.) GeV/c2.
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Updated: Thursday, 2006 June 22 14:40:43 CDT automatically from input from Carol Picciolo