We present a measurement of the top quark mass and of the top-antitop ($t\overline{t}$) pair production cross section using $p\overline{p}$ data collected with the CDF II detector at the Tevatron Collider at the Fermi National Accelerator Laboratory and corresponding to an integrated luminosity of $2.9{\mathrm{fb}}^{-1}$. We select events with six or more jets satisfying a number of kinematical requirements imposed by means of a neural-network algorithm. At least one of these jets must originate from a $b$ quark, as identified by the reconstruction of a secondary vertex inside the jet. The mass measurement is based on a likelihood fit incorporating reconstructed mass distributions representative of signal and background, where the absolute jet energy scale (JES) is measured simultaneously with the top quark mass. The measurement yields a value of $174.8\pm 2.4(\mathrm{stat}+\mathrm{JES}{)}_{-1.0}^{+1.2}(\mathrm{syst})\mathrm{GeV}/c^2$, where the uncertainty from the absolute jet energy scale is evaluated together with the statistical uncertainty. The procedure also measures the amount of signal from which we derive a cross section, ${\sigma }_{t\overline{t}}=7.2\pm 0.5(\mathrm{stat})\pm 1.0(\mathrm{syst})\pm 0.4(\mathrm{lum})\mathrm{pb}$, for the measured values of top quark mass and JES.

• Received 3 February 2010

DOI:https://doi.org/10.1103/PhysRevD.81.052011