Neutrino tri-bi-maximal mixing from a non-Abelian discrete family symmetry

De Medeiros Varzielas, I., King, S.F. and Ross, G.G. (2007) Neutrino tri-bi-maximal mixing from a non-Abelian discrete family symmetry. Physics Letters B, 648, (2-3), 201-206. (doi:10.1016/j.physletb.2007.03.009).


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The observed neutrino mixing, having a near maximal atmospheric neutrino mixing angle and a large solar mixing angle, is close to tri-bi-maximal. We argue that this structure suggests a family symmetric origin in which the magnitude of the mixing angles are related to the existence of a discrete non-Abelian family symmetry. We construct a model in which the family symmetry is the non-Abelian discrete group ?(27), a subgroup of SU(3) in which the tri-bi-maximal mixing directly follows from the vacuum structure enforced by the discrete symmetry. In addition to the lepton mixing angles, the model accounts for the observed quark and lepton masses and the CKM matrix. The structure is also consistent with an underlying stage of Grand Unification.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.physletb.2007.03.009
ISSNs: 0370-2693 (print)
Related URLs:
Subjects: Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 57164
Accepted Date and Publication Date:
3 May 2007Published
Date Deposited: 14 Aug 2008
Last Modified: 31 Mar 2016 12:38

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