We present a measurement of the total $WW$ and $WZ$ production cross sections in $p\overline{p}$ collision at $\sqrt{s}=1.96\mathrm{TeV}$, in a final state consistent with leptonic $W$ boson decay and jets originating from heavy-flavor quarks from either a $W$ or a $Z$ boson decay. This analysis uses the full data set collected with the CDF II detector during Run II of the Tevatron collider, corresponding to an integrated luminosity of $9.4{\mathrm{fb}}^{-1}$. An analysis of the dijet mass spectrum provides $3.7\sigma$ evidence of the summed production processes of either $WW$ or $WZ$ bosons with a measured total cross section of ${\sigma }_{WW+WZ}=13.7\pm 3.9\mathrm{pb}$. Independent measurements of the $WW$ and $WZ$ production cross sections are allowed by the different heavy-flavor decay patterns of the $W$ and $Z$ bosons and by the analysis of secondary-decay vertices reconstructed within heavy-flavor jets. The productions of $WW$ and of $WZ$ dibosons are independently seen with significances of $2.9\sigma$ and $2.1\sigma$, respectively, with total cross sections of ${\sigma }_{WW}=9.4\pm 4.2\mathrm{pb}$ and ${\sigma }_{WZ}=3.7_{-2.2}^{+2.5}\mathrm{pb}$. The measurements are consistent with standard-model predictions.

• Received 23 June 2016

DOI:https://doi.org/10.1103/PhysRevD.94.032008