Anomalous g^5_z coupling at $\gamma \gamma$ colliders

Abstract

We study the constraints on the anomalous coupling $g_5^Z$ that can be obtained from the analysis of the reaction $\gamma \gamma \to W^{+}{W}^{-}Z$ at future linear $e^{+}{e}^{-}$ colliders. We find out that a $0.5$ ($1$) TeV $e^{+}{e}^{-}$ collider operating in the $\gamma \gamma$ mode can probe values of $g_5^Z$ of the order of $0.15$ ($4.5\times 10^{-2}$) for an integrated luminosity of $10$ fb${}^{-1}$. This shows that the ability to search for this anomalous interaction of the $\gamma \gamma$ mode is better than the one of the usual $e^{+}{e}^{-}$ mode, and it is similar to the ability of the $e\gamma$ mode.

Comments: 12 pages, 4 figures as uudecoded ps files