Measurement of the WW-Gamma Vertex Through Single Photon Production at e^+ e^- Colliders

Abstract

We perform a detailed study of the process $e^{+}{e}^{-}\to \gamma {\nu }_l{\bar{\nu }}_l$ and its sensitivity to anomalous gauge boson couplings of the $\gamma WW$ vertex. We concentrate on LEP II energies, $\sqrt{s}=200$ GeV, and energies appropria- te to the proposed Next Linear Collider (NLC) high energy $e^{+}{e}^{-}$ collider with c.m. energies of 500 GeV and 1 TeV. At 200 GeV, the process offers, at best, a consistency check of other processes being considered at LEP-200. At 500 GeV, the parameters ${\kappa }_{\gamma }$ and ${\lambda }_{\gamma }$ can be measured to about $\pm 0.05$ and $\pm 0.1$ respectively at 95\% C.L. while at 1 TeV, they can be measured to about $\pm 0.02$. At the high luminosities anticipa- ted at high energy linear colliders precision measurements are likely to be limited by systematic rather than statistical errors.

Comments: 14 pages with 8 figures (available on request), preprint # OCIP/C 94-4, UQAM-PHE-94-09