Measurement of WW and WZ production in the lepton plus heavy flavor jets final state at CDF

We present the CDF measurement of the diboson WW and WZ production cross section in a final state consistent with leptonic W decay and jets originating from heavy flavor quarks, based on the full Tevatron Run II dataset. The analysis of the di–jet invariant mass spectrum allows the observation of 3.7 sigma evidence for the combined production processes of either WW or WZ bosons. The different heavy flavor decay pattern of the W and Z bosons and the analysis of the secondary–decay vertex properties allow to independently measure the WW and WZ production cross section in a hadronic final state. The measured cross sections are consistent with the standard model predictions and correspond to signal significances of 2.9 and 2.1 sigma for WW and WZ production, respectively.. Authors: Leone, Sandra [Fermilab] (ORCID:0000000162229642). DOE Contract: AC02-07CH11359. Subjects: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS