Softly Broken A_4 Symmetry for Nearly Degenerate Neutrino Masses

Details Softly Broken A_4 Symmetry for Nearly Degenerate Neutrino Masses Softly Broken A_4 Symmetry for Nearly Degenerate Neutrino Masses

2001-06-26

arxiv.org/abs/hep-ph/0106291v1

Phys.Rev. D64 (2001) 113012

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure

Scientific paper

10.1103/PhysRevD.64.113012

The leptonic Higgs doublet model of neutrino masses is implemented with an A_4 discrete symmetry (the even permutation of 4 objects or equivalently the symmetry of the tetrahedron) which has 4 irreducible representations: 1, 1', 1'', and 3. The resulting spontaneous and soft breaking of A_4 provides a realistic model of charged-lepton masses as well as a nearly degenerate neutrino mass matrix. Phenomenological consequences at and below the TeV scale are discussed.

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