Evidence of WW+WZ production with lepton + jets final states in proton-antiproton collisions at sqrt(s)=1.96 TeV

TL;DR

This paper reports the first evidence of WW+WZ production in proton-antiproton collisions at 1.96 TeV, using lepton+jets final states, with results consistent with Standard Model predictions and a significance of 4.4 sigma.

Contribution

It provides the first experimental evidence of WW+WZ production in lepton+jets channels at a hadron collider, confirming SM predictions.

Findings

Measured cross section: 20.2 +/- 4.5 pb

Significance: 4.4 standard deviations

Results consistent with SM prediction of 16.1 +/- 0.9 pb

Abstract

We present the first evidence of WW+WZ production with lepton+jets final states at a hadron collider. The data correspond to 1.07 inverse femtobarns of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider in proton-antiproton collisions at sqrt(s)=1.96 TeV. The observed cross section for WW+WZ production is 20.2 +/- 4.5 pb, consistent with the SM prediction of 16.1 +/- 0.9 pb. The probability for background fluctuations to produce an excess equal to or larger than that observed is estimated to be 5.4e-6, corresponding to a significance of 4.4 standard deviations.