A Discrete symmetry group for maximal atmospheric neutrino mixing

By W. Grimus, L. Lavoura. 2003

212 citations recorded by the source corpus.

Abstract We propose a discrete non-abelian symmetry group which enforces maximal atmospheric neutrino mixing, while θ 13 =0 and the solar mixing angle θ 12 remains undetermined; without finetuning, θ 12 will be large but non-maximal. Our extension of the Standard Model has three right-handed neutrino singlets ν R 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 ν R 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 m 3 > m 2 > m 1 , and the effective Majorana mass of neutrinoless ββ decay is equal to m 1 m 2 / m 3 .

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/70660c6ab3aecb70ec76fbde8f56c4c0dd438ab7

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In Nuclear and High Energy Physics

Citations in the corpus

Finite flavour groups of fermions (2011, methodology): “Also D4, D5 and higher dihedral groups have been used for this purpose [29, 30, 31].”