Measurement of trilinear gauge boson couplings from $WW _s16 WZ o ellu jj$ events in $parp$ collisions at $sqrts=1.96$ TeV

Abstract

We present a direct measurement of trilinear gauge boson couplings at $gamma WW$ and $ZWW$ vertices in $WW$ and $WZ$ events produced in pp collisions at tevE. 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 ifb of integrated luminosity. Considering two different relations between the couplings at the $gamma WW $ and $ZWW$ vertices, we measure these couplings at 68% C.L. to be $kappa_{gamma}=1.07^{_s160.26}_{-0.29}$, $lambda =0.00^{_s160.06}_{-0.06}$ and $g_{1}^{Z}=1.04^{_s160.09}_{-0.09}$ in a scenario respecting $SU(2)_Lotimes U(1)_Y$ gauge symmetry and $kappa =1.04^{_s160.11}_{-0.11} $ and $lambda =0.00^{_s160.06}_{-0.06}$ in an _s15equal couplings_s15 scenario.