We present a measurement of the tt-bar production cross section
in p anti-p collisions at s**(1/2) ñ.96 TeV using events containing a high
transverse momentum electron or muon, three or more jets, and missing
transverse energy. Events consistent with tt-bar decay are found by
identifying jets containing candidate heavy-flavor semileptonic decays
to muons. The measurement uses a CDF Run II data sample corresponding
to 2 fb-1 of integrated luminosity. Based on 248 candidate events with
three or more jets and an expected background of 79.5 +/- 5.3 events,
we measure a production cross section of 9.1 +/- 1.6 pb.
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Updated: Wednesday, 2009 November 11 13:23:20 CST automatically from input from carol picciolo