Light sterile neutrino in the minimal extended seesaw

被引：71

作者：

Zhang, He ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

来源：

PHYSICS LETTERS B | 2012年 / 714卷 / 2-5期

关键词：

SYMMETRY; MASS; DECAY;

D O I：

10.1016/j.physletb.2012.06.074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Motivated by the recent observations on sterile neutrinos, we present a minimal extension of the canonical type-1 seesaw by adding one extra singlet fermion. After the decoupling of right-handed neutrinos, an eV-scale mass eigenstate is obtained without the need of artificially inserting tiny mass scales or Yukawa couplings for sterile neutrinos. In particular, the active-sterile mixing is predicted to be of the order of 0.1. Moreover, we show a concrete flavor A(4) model, in which the required structures of the minimal extended seesaw are realized. We also comment on the feasibility of accommodating a key sterile neutrino as an attractive candidate for warm dark matter. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：262 / 266

页数：5

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