Abstract
Phys.Rev.Lett.99:182002,2007 We present a measurement of the mass of the top quark from proton-antiproton
collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron.
We analyze events from the single lepton plus jets final state ($t\bar t\to
W^+bW^-\bar b\to l\nu b q \bar q'\bar b$). The top quark mass is extracted
using a direct calculation of the probability density that each event
corresponds to the $t\bar t$ final state. The probability is a function of both
the mass of the top quark and the energy scale of the calorimeter jets, which
is constrained {\it in situ} by the hadronic $W$ boson mass. Using 167 events
observed in 955 pb$^{{-}1}$ of integrated luminosity, we achieve the single
most precise measurement of the top quark mass, 170.8 $\pm$ 2.2 (stat.) $\pm$
1.4 (syst.) GeV/$c^2$.