  The difference in distributions of $\mu^+$ and $\mu^-$ in reactions $\gamma
\gamma \to \mu^+\mu^-+\nu\bar\nu$ and $\gamma \gamma \to W^\pm\mu^\mp
+\nu(\bar\nu)$ with polarized photons at $\sqrt{s}>200$ GeV is a large
observable effect which is sensitive to New Physics phenomena.
