Search for singly produced supersymmetric electrons in e/sup +/e/sup -/ interactions

A search for supersymmetric electron production via the reaction ${e}^{+}{e}^{\\ensuremath{-}}\\ensuremath{\\rightarrow}{e}^{\\ifmmode\\pm\\else\\textpm\\fi{}}\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{\\ensuremath{\\gamma}}{\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{e}}^{\\ensuremath{\\mp}}$ followed by the decay ${\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{e}}^{\\ensuremath{\\mp}}\\ensuremath{\\rightarrow}{e}^{\\ensuremath{\\mp}}\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{\\ensuremath{\\gamma}}$ has been performed with the MAC detector at the electron-positron storage ring PEP. No candidates were found in a sample corresponding to an integrated luminosity of 36.4 ${\\mathrm{pb}}^{\\ensuremath{-}1}$. For a massless $\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{\\ensuremath{\\gamma}}$ this corresponds to a lower limit on the $\\stackrel{\\ifmmode \\tilde{}\\else \\~{}\\fi{}}{e}$ mass of 22.4 GeV/${\\mathit{c}}^{2}$ at the 95% confidence level.