Measurement of trilinear gauge boson couplings from WW + WZ → lvjj events in pp collisions at √s= 1.96 TeV

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

2009

Comments

Published in PHYSICAL REVIEW D 80, 053012 (2009). Copyright © 2009 The American Physical Society. Used by permission.

Abstract

We present a direct measurement of trilinear gauge boson couplings at γWW and ZWW vertices in WW and WZ events produced in pp collisions at √s= 1.96 TeV. We consider events with one electron or muon, missing transverse energy, and at least two jets. The data were collected using the D0 detector and correspond to 1.1 fb^-1 of integrated luminosity. Considering two different relations between the couplings at the γWW and ZWW vertices, we measure these couplings at 68% C.L. to be κ_γ = 1.07^+0.26_-0.29, λ = 0.00_-0.06^+0.06, and g₁^Z = 1.04_-0.09^+0.09 in a scenario respecting SU(2)_L gauge symmetry and κ = 1.04^+0.11_-0.11 and λ = 0.0^+0.06_=0.06 in an “equal couplings” scenario.