AN ANALYSIS OF FOUR-ELEMENT MODELS OF LEPTONS AND NON-DIAGONAL NEUTRAL CURRENTS
Wu D · 1978
Due to the possible production of neutral and charge heavy leptons by v_μ models consisting of four elements per line, e.g.v_e, e~-, E~0, E~- v_μ μ~-, M~0 M~- v_τ, τ~-, T~0, T~- …… are analysed. Non-diagonal neutral currents cannot be avoided. Nevertheless, a model is proposed within SU_((2))×U_((1)) in which the process μ→eγ can still be suppressed by the Bjorken-Lane-Weinberg mechanism; various production cross-sections for heavy leptons are reasonable when compared with experiments. Models corresponding to SU_((3))×U((1)) and still higher symmetries are discussed.