Constraining the Selectron Mass in the Process e^- + gamma --> neutralino_1 +selectron_{L/R}^- --> e^- + 2 neutralino_1

With the process $e^-\gamma \to \tilde{\chi}1^0 \tilde{e}{L/R}^- \to e^- \tilde{\chi}_1^0 \tilde{\chi}_1^0$ it is possible to constrain selectron masses above the kinematical limit of the pair production process in $e^{+}{e}^{-}$ colliders. We investigate these mass ranges and discuss the possibility to test the renormalization group equations for the selectron masses.