Measurement of the WZ -} lvll cross section and limits on anomalous triple gauge couplings in p(p)over-bar collisions at sqrt(s)=1.96 TeV
2011
Abstract
We present a new measurement of the WZ -} lvll (l = e, mu) cross section and limits on anomalous triple gauge couplings. Using 4.1 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV, we observe 34 WZ candidate events with an estimated background of 6.0 +/- 0.4 events.
We measure the WZ production cross section to be 3.89(-0.90)(+1.07) pb, in good agreement with the standard model prediction. We find no evidence for anomalous WWZ couplings and set 95% C.L. limits on the coupling parameters, -0.077 { lambda(z) { 0.093 and -0.029 { Delta kappa(z) { 0.080 in the HISZ parameterization for a Lambda = 2 TeV form factor scale.
These are the best limits to date obtained from the direct measurement of the WWZ vertex.