Production of photinos in e^{+}e^{-}→γγ[over ̃]γ[over ̃]

We discuss the production of photinos in $e^{+}{e}^{-}\to \gamma \tilde{\gamma }\tilde{\gamma }$ for arbitrary photino and scalar-electron masses. We present detailed cross sections as a function of various parameters, as well as a discussion of the background coming from $e^{+}{e}^{-}\to \gamma \nu \overline{\nu }$. We conclude from our analysis that it may be possible to observe the signatures of supersymmetry in this process only for scalar-electron and photino masses up to 40 and 5 GeV, respectively, and for $\sqrt{s}\lesssim 40$ GeV. Otherwise the process $e^{+}{e}^{-}\to \gamma \nu \overline{\nu }$ becomes a dominant process.