A discrete symmetry group for maximal atmospheric neutrino mixing

Walter Grimus, Luis Lavoura

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed


    We propose a discrete non-abelian symmetry group which enforces maximal atmospheric neutrino mixing, while θ13 = 0 and the solar mixing angle θ12 remains undetermined; without finetuning, θ12 will be large but non-maximal. Our extension of the Standard Model has three right-handed neutrino singlets νR and implements the seesaw mechanism. Furthermore, we have an enlarged scalar sector with three Higgs doublets and two scalar gauge singlets; the latter have masses and vacuum expectation values of the order of the seesaw scale. Lepton mixing stems exclusively from the νR Majorana mass matrix, where non-diagonal elements are generated by the vacuum expectation values of the scalar singlets. The model predicts a neutrino mass spectrum with m3 > m2 > m1, and the effective Majorana mass of neutrinoless ββ decay is equal to m1 m2/m 3. © 2003 Elsevier B.V. All rights reserved
    Seiten (von - bis)189-195
    FachzeitschriftPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
    PublikationsstatusVeröffentlicht - 2003

    ÖFOS 2012

    • 103036 Theoretische Physik