How to Evade a No-Go Theorem in Flavor Symmetries

Yoshio Koide, Takeshi Fukuyama, Tatsuru Kikuchi
2008 AIP Conference Proceedings  
A no-go theorem in flavor symmetries is reviewed. The theorem asserts that we cannot bring any flavor symmetry into mass matrix model in which number of Higgs scalars is, at most, one for each sector (e.g. H_u and H_d for up- and down-quark sectors, respectively). Such the strong constraint comes from the SU(2)_L symmetry. Possible three options to evade the theorem are discussed.
doi:10.1063/1.2939063 fatcat:ppga47ojmvehjcfh2eurs2rqie