Unravelling the $WW\gamma$ and $WWZ$ Vertices at the Linear Collider: $\bar{\nu} \nu\gamma$ and $\bar{\nu}\nu\bar{q}q$ final states

Abstract

We perform a detailed analysis of the processes $e^+e^- \rightarrow \bar{\nu} \nu\gamma$ and $\bar{\nu}\nu\bar{q}q$ at future linear $e^+e^-$ colliders and assess their sensitivity to anomalous gauge boson couplings. We consider center of mass energies $\sqrt{s}=$ 350, 500 and 800 GeV. We demonstrate that significant improvements can be obtained if the phase space information for the cross sections is used maximally. At 800 GeV the parameters $\Delta\kappa_{\gamma}$ and $\lambda_{\gamma}$ can be constrained, at 95\% CL, to about 0.02 and 0.01, while the parameters $\Delta\kappa_Z$, $\lambda_Z$ and $\Delta g_1^Z$ can be probed down to about 0.009, 0.002 and 0.004 respectively. The precision of these measurements is likely to be limited by statistical errors at anticipated luminosities at these energies.