Measurement of the $t\bar t$ Production Cross Section in $p\bar p $ Collisions at $\sqrt{s}=1.96$ TeVUsing Lepton Plus Jets Events with Secondary Vertex b-Tagging

We present a preliminary measurement of the $t\bar{t}$ pair production cross section in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV using 340 pb$^{-1}$ of data collected by the CDFII detector at the Fermilab Tevatron. We measure the cross section in events with one high high transverse momentum lepton and 3 or more jets, where at least one $b$-jet is identified via a displaced vertex algorithm.