Formation of light resonances in $K^{0}_{S}K^{pm}K^{mp}$ and $\eta\pi^{+}\pi^{-}$ channels in $\gamma\gamma$ collisions at LEP

The K/sub S//sup 0/ K/sup +or-/ pi /sup -or+/ and eta pi /sup +/ pi /sup -/ final states in two-photon collisions are studied with the L3 detector at LEP using data collected at centre of mass energies from 183 to 202 GeV. The mass spectrum of the K/sub S//sup 0/ K/sup +or-/ pi /sub -or+/ final state shows an enhancement around 1470 MeV, which is identified with the pseudoscalar eta (1440). This state is observed in the gamma gamma collisions for the first time and the value of its two-photon width is obtained. In the eta pi /sup +/ pi /sup -/ channel only the f/sub 1/(1285) is observed, upper limits for the formation of eta (1440) and eta (1295) are given. (6 refs).