We report a measurement of the tt-bar production cross section
using the CDF II detector at the Fermilab Tevatron. The analysis is
performed using 322 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV. The
data consist of events selected with six or more hadronic jets with
additional kinematic requirements. At least one of these jets must be
identified as a b-quark jet by the reconstruction of a secondary vertex.
The cross section is measured to be sigma_tt-bar = 7.5 +/-
2.1(stat.)+3.3_-2.2(syst.)+0.5_-0.4(lumi.) pb, which is consistent with
the standard model prediction.
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Updated: Tuesday, 2006 October 17 15:05:11 CDT automatically from input from Carol Picciolo