Summary
We interpret the recent discovery by MkII at the SLC that the number of massless neutrino generations is 3 to mean that the family symmetry is indeedSU(3), so that our «low energy» symmetry group isSU(2)L×U 1×SU(3)c×SU(3)f, where low now means small compared to the Planck mass. A possible model with a large top-quark mass is exhibited. The model is made complete by analogy with the originalSU(3)flavor model of Gell-Mann. In fact, if the latter analogy is pursued literally, it leads tom t≅65.8 +39.7−8.5 GeV. Such a value is currently still viable.
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Work supported in part by the U.S. DOE, contract DE-AS05-76ER03956.
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Ward, B.F.L. Three generations and a large top-quark mass. Nuov Cim A 105, 1313–1318 (1992). https://doi.org/10.1007/BF02731007
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DOI: https://doi.org/10.1007/BF02731007