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Title: Soft A4→Z3 symmetry breaking and cobimaximal neutrino mixing

In this study, I propose a model of radiative charged-lepton and neutrino masses with A4 symmetry. The soft breaking of A4 to Z3 lepton triality is accomplished by dimension-three terms. The breaking of Z3 by dimension-two terms allows cobimaximal neutrino mixing (θ13 ≠ 0, θ23 = π/4, δcp=π/2) to be realized with only very small finite calculable deviations from the residual Z3 lepton triality. This construction solves a long-standing technical problem inherent in renormalizable A4 models since their inception.
Authors:
 [1]
  1. Univ. of California, Riverside, CA (United States). Dept. of Physics and Astronomy; Hong Kong Univ. of Science and Technology, Hong Kong (China). HKUST Jockey Club Institute for Advanced Study
Publication Date:
OSTI Identifier:
1262220
Grant/Contract Number:
SC0008541
Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 755; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Univ. of California, Riverside (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS cp violation; mass; model