1202.6629 (Jason Nett et al.)

Measurement of the $WZ$ Cross Section and Triple Gauge Couplings in $p
\bar p$ Collisions at $\sqrt{s} = 1.96$ TeV    [PDF]

Jason Nett, Rami Vanguri

This Letter describes the current most precise measurement of the $WZ$ production cross section as well as limits on anomalous $WWZ$ couplings at a center-of-mass energy of 1.96 TeV in proton-antiproton collisions at the Collider Detector at Fermilab (CDF). The $WZ$ candidates are reconstructed from decays containing three charged leptons and missing energy from a neutrino, where the charged leptons are either electrons or muons. Using data collected by the CDF II detector (7.1 fb$^{-1}$ of integrated luminosity), 64 candidate events are observed with the expected background contributing $8 \pm 1$ events. The measured total cross section $\sigma (p \bar p \to WZ) = 3.93_{-0.53}^{+0.60}(\text{stat})_{-0.46}^{+0.59}(\text{syst}) $ pb is in good agreement with the standard model prediction of $3.50\pm 0.21$. The same sample is used to set limits on anomalous $WWZ$ couplings.

View original: http://arxiv.org/abs/1202.6629