A measurement of the top-quark pair-production cross section in $p\overline{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$ using data corresponding to an integrated luminosity of $1.12{\mathrm{fb}}^{-1}$ collected with the Collider Detector at Fermilab is presented. Decays of top-quark pairs into the final states $e\nu +$ jets and $\mu \nu +$ jets are selected, and the cross section and the $b$-jet identification efficiency are determined using a new measurement technique which requires agreement between the measured cross sections with exactly one and with multiple identified $b$ quarks from the top-quark decays. Assuming a top-quark mass of $175\mathrm{GeV}/c^2$, a cross section of $8.5\pm 0.6(\mathrm{stat})\pm 0.7(\mathrm{syst})\mathrm{pb}$ is measured.

• Received 14 October 2010

DOI:https://doi.org/10.1103/PhysRevD.83.071102