We present a measurement of the top pair production cross section
in p anti-p collisions at s**(1/2) = 1.96 TeV. We collect a data sample with an
integrated luminosity of 194 +/- 11 pb-1 with the CDF II detector at the
Fermilab Tevatron. We use an artificial neural network technique to
discriminate between top pair production and background processes in a
sample of 519 lepton + jet events, which have one isolated energetic charged
lepton, large missing transverse energy and at least three energetic jets.
We measure the top pair production cross section to be sigma_tt-bar = 6.6
+/- 1.1 +/- 1.5 pb, where the first uncertainty is statistical and the
second is systematic.
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Updated: Friday, 2005 September 16 15:34:59 CDT automatically from input from Carol Picciolo