Abstract
We examine the effect on neutrino counting in e/sup +/e/sup -/..--> nu..nu-bar..gamma.. due to light right-handed neutrinos and extra gauge bosons that could occur in some superstring-inspired E/sub 6/ gauge models. The effect can be as high as ..delta..N/sub ..nu../approx. =0.75 at ..sqrt..s = 30 GeV, but is smaller at higher energies.
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