We present a measurement of the top-quark pair production
cross-section in proton-antiproton collisions at $s**(1/2)$=1.96 TeV.
The data were collected at the Fermilab Tevatron by the CDF~II detector
and correspond to an integrated luminosity of 8.8 fb-1, representing
the complete CDF Run~II data set. We select events consistent with
the production of top-quark pairs by requiring the presence of two
reconstructed leptons, an imbalance in the total event transverse
momentum, and jets. At least one jet is required to be identified
as consistent with the fragmentation of a bottom quark using a
secondary-vertex-finding algorithm. The 246 candidate events are
estimated to have a signal purity of 91%. We measure a cross section
of $\sigma_{\t anti-t}$ = 7.09 $+-$ 0.84 pb, assuming a top-quark mass
of 172.5 GeV/c2. The results are consistent with the standard model as
predicted by next-to-leading-order calculations.
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Updated: Thursday, 2013 May 02 12:56:56 CDT automatically from input from Barbara Hehner