Combined measurements of anomalous charged trilinear gauge-boson couplings from diboson production in p-pbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper reports the first combined high-statistics measurements of anomalous WWgamma and WWZ gauge couplings from multiple diboson channels at the Tevatron, providing the most precise limits to date on these couplings and related W boson properties.

Contribution

It presents the first high-statistics combination of diboson production channels to measure anomalous gauge couplings at the Tevatron, improving precision and setting new limits.

Findings

Measured anomalous gauge couplings with high precision.

Set the most stringent limits on W boson magnetic dipole and quadrupole moments.

Provided combined results across multiple channels for the first time.

Abstract

We present measurements of the anomalous WWgamma and WWZ trilinear gauge couplings from a combination of four diboson production and decay channels using data collected by the D0 detector at the Fermilab Tevatron Collider. These results represent the first high statistics combination of limits across different diboson production processes at the Tevatron and use data corresponding to an integrated luminosity of approximately 1 fb^-1. When respecting SU(2)_L x U(1)_Y symmetry, we measure central values and 68% C.L. allowed intervals of kappa_gamma=1.07^+0.16_-0.20, lambda =0.00^+0.05_-0.04 and g_1^Z=1.05 +/- 0.06. We present the most stringent measurements to date for the W boson magnetic dipole and electromagnetic quadrupole moments of mu_W=2.02^+0.08_-0.09 (e/2M_W) and q_W=-1.00 +/- 0.09 (e/M^2_W), respectively.