Vector Boson Pair Production and Trilinear Gauge Boson Couplings - Results From the Tevatron

TL;DR

This paper reports on measurements of vector boson pair production and limits on anomalous gauge couplings from Tevatron experiments, including the first observation of a ZZ event and combined results with LEP data.

Contribution

It provides the first combined limits on anomalous gauge couplings from Tevatron and LEP, and reports the first observation of a ZZ event at the Tevatron.

Findings

95% CL limits on anomalous couplings from Tevatron and LEP data.

First observation of a ZZ event at the Tevatron.

Prospects for future measurements in Run II.

Abstract

Direct measurements of vector boson pair production processes and trilinear gauge boson couplings have been conducted by the CDF and DO Collaborations. Preliminary results from searches for anomalous WW/WZ->muon-neutrino-jet-jet and WZ->e-e-e-neutrino production are presented. 95% CL anomalous coupling limits from previously published DO results are -0.20 < lambda < 0.20 (Delta kappa=0) and -0.30 < Delta kappa < 0.43 (lambda=0) for Lambda=2000 GeV where the WWgamma couplings are assumed to equal the WWZ couplings. Combined DO + LEP experiment anomalous coupling limits are presented for the first time. 95% CL limits are -0.16<lambda(gamma)< 0.10 (Delta kappa=0) and -0.15 < Delta kappa(gamma) < 0.41 (lambda=0) under the assumption that the couplings are related by the ``HISZ'' constraints. 95% CL anomalous ZZg and Zgg coupling limits from DO are |h(30)^Z|<0.36 (h(40)^Z=0) and |h(40)^Z|<0.05 (h(30)^Z=0) for Lambda=750 GeV. CDF reports the first observation of a ZZ event. Prospects for Run II are discussed.