1995/08/25 by Yoshio Koide, Koide, Yoshio
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9508369
10 pages, a LaTex file without figures. A hard copy with figures is available upon request
arxiv created 1996/02/05 · arxiv updated 2009/11/30
On the basis of a seesaw-type mass matrix model for quarks and leptons, Mf ≃ mL MF-1 mR, where mL∝ mR are universal for f=u,d,ν and e (up-quark-, down-quark-, neutrino- and charged lepton-sectors), and MF is given by MF=K (\bf 1 + 3 bf X) (\bf 1 is a 3× 3 unit matrix, X is a democratic-type matrix and bf is a complex parameter which depends on f, neutrino mass spectrum and mixings are discussed. The model can provide an explanation why mt ≫ mb, while mu∼ md by taking bu=-1/3, at which the detarminant of MF becomes zero. At bν=-1/2, the model can provide a large νμ-ντ mixing, sin2 2θ23≃ 1, with mν1 ≪ mν2 ≃ mν3, which is favorable to the atmospheric and solar neutrino data.