Possible nonstandard effects in Zγ events at LEP2

We point out that the so-called `radiative returnʹ events e+e−→Zγ are suited to the study of nonstandard physics, particularly if the vector bosons are emitted into the central detector region. An effective vertex (amplitude) is constructed which contains the most general gauge invariant e+e−Zγ interaction. The interference pattern between this and the Standard Model e+e−Zγ amplitude is calculated. Phenomenolgocial consequences of the results are examined. Low Energy Constraints on the effective vertex are discussed as well.