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We present a measurement of the top-quark pair production cross-section inproton-antiproton collisions at $\sqrt{s}$=1.96 TeV. The data were collected atthe Fermilab Tevatron by the CDF II detector and correspond to an integratedluminosity of 8.8 fb$^{-1}$, representing the complete CDF Run II data set. Weselect events consistent with the production of top-quark pairs by requiringthe presence of two reconstructed leptons, an imbalance in the total eventtransverse momentum, and jets. At least one jet is required to be identified asconsistent with the fragmentation of a bottom quark using asecondary-vertex-finding algorithm. The 246 candidate events are estimated tohave a signal purity of 91%. We measure a cross section of $\sigma_{\ttbar}$ =7.09 $\pm$ 0.84 pb, assuming a top-quark mass of 172.5 GeV/$c^{2}$. The resultsare consistent with the standard model as predicted by next-to-leading-ordercalculations.

Measurement of the top-quark pair production cross-section in events with two leptons and bottom-quark jets using the full CDF data set