We report a measurement of the reaction $\gamma \gamma \to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ in both tagged and untagged events at PEP. The cross section rises with invariant $\gamma \gamma$ mass to about 15 nb at 2 GeV and falls slowly at higher masses. We find clear evidence for the processes $\gamma \gamma \to \phi {\pi }^{+}{\pi }^{-}$ and $\gamma \gamma \to K^{*0\mathrm{}}\mathrm{}\left(892\right)K\pi$. Upper limits (95% C.L.) of 1.5 and 5.7 nb in the mass range from 1.7 to 3.7 GeV are obtained for $\phi {\rho }^0$ and $K^{*0\mathrm{}}{\overline{K}}^{*0\mathrm{}}$ production, respectively.

• Received 25 February 1985

DOI:https://doi.org/10.1103/PhysRevLett.54.2564