Lepton Flavor Non-Conservation

Abstract

In the present work we review the most prominent lepton flavor violating processes ($μ\ra eγ$, $μ\ra 3e$, $(\mu ,e)$ conversion, $M-\bar{M}$ oscillations etc), in the context of unified gauge theories. Many currently fashionable extensions of the standard model are considered, such as: {\it i)} extensions of the fermion sector (right-handed neutrino); {\it ii)} minimal extensions involving additional Higgs scalars (more than one isodoublets, singly and doubly charged isosinglets, isotriplets with doubly charged members etc.); {\it iii)} supersymmetric or superstring inspired unified models emphasizing the implications of the renormalization group equations in the leptonic sector. Special attention is given to the experimentaly most interesting $(\mu -e)$ conversion in the presence of nuclei. The relevant nuclear aspects of the amplitudes are discussed in a number of fashionable nuclear models. The main features of the relevant experiments are also discussed, and detailed predictions of the above models are compared to the present experimental limits.

(IOA-300/93, review article, 83p, 6 epsf figures , available upon request from [email protected]) %

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