Anomalous Lepton Events and SU(2)_L×U(1) Gauge Model with Off-Diagonal Neutral Currents

概要

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An SU(2)_L×U(1) gauge model with seven quarks and seven leptons is proposed. In the model, the neutral current conserves strangeness naturally. The model has some flavoer-changing neutral currents in the charge +2/3 quark sector and a lepton-number-changing neutral current in the charge- neutral lepton sector. The former, especially (t^^-u)_L, plays an important role in explanation of ν_μN→e^+X and ν_μ(ν^^-_μ)N →μμX, and the latter (M^^-^0ν_μ)_L in explanation of ν_μN→3μX. it is shown that the two-component structure in the trimuon-invariant-mass-destribution is better explained by the two types of cascade decays of the neutral heavy lepton M^0. It is noted that our model has a single Higgs scalar doublet similar to the one in the original Weinberg-Salam model.
理論物理学刊行会の論文
1978-08-25