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

We discuss the production of photinos in ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\gamma}}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\gamma}}$ 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 ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\nu}\overline{\ensuremath{\nu}}$. 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 $\sqrt{s}\ensuremath{\lesssim}40$ GeV. Otherwise the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ becomes a dominant process.