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A Study of the Charged Scalar in the Zee Model

G. C. McLaughlin, J. N. Ng

hep-pharXiv:hep-ph/9903509

Abstract

An extension of the Zee model involving a light right handed neutrino, nuR is considered. We update constraints on couplings between the bilepton scalar, the active neutrinos, nuR and the charged leptons. We find that the most stringent constraint currently comes from measurements limiting the width of the decay mu -> e gamma. These are used to predict the upper bound on violation of lepton universality in leptonic W boson decays and rare Z decays, such as Z -> e mu.

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