A measurement of the \ttbar~pair production cross section is presented
using 162~$\mathrm{pb^{-1}}$ of data collected by the CDF experiment during Run 
II
at the Tevatron. \ttbar~events in the lepton+jets 
channel are isolated by identifying electrons and muons, reconstructing
jets and transverse missing energy, and identifying $b$ jets with
a secondary vertex tagging algorithm. The efficiency of the 
algorithm is measured in a control sample using a novel technique
that is less dependent on the simulation.
For a top quark mass of $175\,\mathrm{GeV}/c^2$, a cross section of 
$\sigmatt = 5.6^{+1.2}_{-1.1} {(\mathrm{stat.})}^{+0.9}_{-0.6} {(\mathrm{syst.})
} \mathrm{pb}$~is measured.
%, in agreement with the Standard Model theoretical predictions.


Posted to /cdf/pub/thesis/cdf7632_SecVtxXsecThesis.pdf
    http://www-cdf.fnal.gov/thesis/cdf7632_SecVtxXsecThesis.pdf

Posted by bachacou