Measurement of the WW+WZ Production Cross Section Using a Matrix Element Technique in Lepton + Jets Events

Abstract

We present a measurement of the $WW+WZ$ production cross section observed in a final state consisting of an identified electron or muon, two jets, and missing transverse energy. The measurement is carried out in a data sample corresponding to up to 4.6~fb${}^{-1}$ of integrated luminosity at $\sqrt{s}=1.96$ TeV collected by the CDF II detector. Matrix element calculations are used to separate the diboson signal from the large backgrounds. The $WW+WZ$ cross section is measured to be $17.4\pm 3.3$~pb, in agreement with standard model predictions. A fit to the dijet invariant mass spectrum yields a compatible cross section measurement.

arXiv commentSubmitted to Phys. Rev. D

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