This report describes a measurement of the top quark mass in
p anti-p collisions at a center of mass energy of 1.8 TeV. The data sample was
collected with the CDF detector during the 1992-95 collider run at the
Fermilab Tevatron, and corresponds to an integrated luminosity of 106 pb-1.
Candidate tt-bar events in the "lepton-jets" decay channel provide our most
precise measurement of the top quark mass. For each event a top mass is
determined by using energy and momentum constraints on the production of the
tt-bar pair and its subsequent decay. A likelihood fit to the distribution
of reconstructed masses in the data sample gives a top mass in the
lepton+jets channel of 176.1 +/- 5.1(stat.) +/- 5.3(syst.) GeV/c2.
Combining this result with measurements from the "all-hadronic" and
"dilepton" decay topologies yields a top mass of 176.1 +/- 6.6 GeV/c2.
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Updated: Saturday, 2001 January 20 11:09:02 CST automatically from input from Carol Picciolo