Anomalous Quartic Couplings in W^+W^-\gamma, Z^0Z^0\gamma and Z^0\gamma\gamma Production at Present and Future e^+e^- Colliders

Abstract

The production of three electroweak gauge bosons in high-energy $e^{+}{e}^{-}$ collisions offers a window on anomalous quartic gauge boson couplings. We investigate the effect of three possible anomalous couplings on the cross sections for $W^{+}{W}^{-}\gamma$, $Z^0{Z}^0\gamma$ and $Z^0\gamma \gamma$ productions at LEP2 ($\sqrt{s}=200$ GeV) and at a future linear collider ($\sqrt{s}=500$ GeV). We find that the combination of energies and processes provides reasonable discrimination between the various anomalous contributions.

Comments: 15 pages, 7 figures, LaTex, further discussion on scale parameter \Lambda and effect of trilinear couplings added, figures updated