We present a measurement of the mass of the top quark from p anti-p
collisions at 1.96 TeV observed with the Collider Detector at Fermilab (CDF)
at the Fermilab Tevatron Run II. The events have the decay signature of
p anti-p --> tt-bar in the lepton plus jets channel in which at least one jet is
identified as coming from a secondary vertex and therefore a b-hadron. The
largest systematic uncertainty, the jet energy scale (JES), is convoluted
with the statistical error using an in-situ measurement of the hadronic W
boson mass. We calculate a likelihood for each event using leading-order
tt-bar and W + jets cross-sections and parameterized parton showering. The
final measured top quark mass and JES systematic is extracted from a joint
likelihood of the product of individual event likelihoods. From 118 events
observed in 680 pb-1 of data, we measure a top quark mass of 174.09 +/-
2.54 (stat + JES) +/- 1.35 (syst) GeV/c2.
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Updated: Wednesday, 2006 June 14 13:49:53 CDT automatically from input from Carol Picciolo