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

With the process $e^-γ\to \tildeχ_1^0 \tilde{e}_{L/R}^- \to e^- \tildeχ_1^0 \tildeχ_1^0$ 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.

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