2001/10/31 by Teruyuki Kitabayashi, Masaki Yasue, Masaki Yasuè · 3 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Higgs boson #Lepton #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics theoretical and experimental studies #Radiative transfer #Seesaw mechanism #Solar neutrino #Solar neutrino problem #hep-ph
paper · pdf · doi:10.1016/s0370-2693(01)01368-5
published as Phys.Lett.B524:308-318,2002 · RevTex, 10 pages including one figure. In Ref.[25], the cited page number is corrected
arxiv created 2001/12/21 · openalex publication_date 2002/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We find that the presence of a global Le−Lμ−Lτ (≡L′) symmetry and an S2 permutation symmetry for the μ and τ families supplemented by a discrete Z4 symmetry naturally leads to almost maximal atmospheric neutrino mixing and large solar neutrino mixing, which arise, respectively, from type-II seesaw mechanism initiated by an S2-symmetric triplet Higgs scalar s with L′=2 and from radiative mechanism of the Zee type initiated by two singly charged scalars, an S2-symmetric h+ with L′=0 and an S2-antisymmetric h′+ with L′=2. The almost maximal mixing for atmospheric neutrinos is explained by the appearance of the democratic coupling of s to neutrinos ensured by S2 and Z4 while the large mixing for solar neutrinos is explained by the similarity of h+ and h′+ couplings described by fh+∼fh− and μ+∼μ−, where fh+ (fh−) and μ+ (μ−) stand for h+ (h′+) couplings, respectively, to leptons and to Higgs scalars.