Hybrid seesaw neutrino masses with A4 family symmetry

被引：115

作者：

Chen, SL ^{[1
]}

Frigerio, M ^{[1
]}

Ma, E ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

来源：

NUCLEAR PHYSICS B | 2005年 / 724卷 / 1-2期

关键词：

D O I：

10.1016/j.nuclphysb.2005.07.012

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider the scenario in which neutrino data are explained by the interplay of type I and II seesaw terms in the Majorana neutrino mass matrix Mu(v) = Mu(L) - MDMR-1 M-D(T). We construct a predictive model with Mu L proportional to the unit matrix, 3 diagonal texture zeros in Mu(R), and Mu(D) diagonal. We show how this pattern can be maintained by the non-Abelian discrete symmetry A(4), and discuss its phenomenological consequences. It turns out that the two types of seesaw give contributions of the same order to M-v. In the CP conserving case, we find sin theta(13) approximate to 2/(tan 2 theta(23) tan 2 theta(12)) and we predict inverted (normal) ordering of the mass spectrum for tan(2) theta(12) < 0.5 (> 0.5). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：423 / 431

页数：9

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