文献类型：期刊文献

英文题名：A light sterile neutrino from Friedberg-Lee symmetry

作者：He, Xiao-Gang[1,2,3,4,5,6];Liao, Wei[7]

机构：[1]Shanghai Key Lab Particle Phys & Cosmol, Shanghai, Peoples R China;[2]Shanghai Jiao Tong Univ, INPAC, Shanghai 200030, Peoples R China;[3]Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China;[4]Natl Tsing Hua Univ, Dept Phys, Natl Ctr Theoret Sci, Div Phys, Hsinchu, Taiwan;[5]Natl Taiwan Univ, CTS, CASTS, Taipei 10764, Taiwan;[6]Natl Taiwan Univ, Dept Phys, Taipei, Taiwan;[7]E China Univ Sci & Technol, Inst Modern Phys, Sch Sci, Shanghai 200237, Peoples R China

年份：2014

卷号：728

起止页码：68

外文期刊名：PHYSICS LETTERS B

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000330556000013)】；

基金：This work is supported by National Science Foundation of China (NSFC), grant Nos. 11135009, 11375065 and Shanghai Key Laboratory of Particle Physics and Cosmology, grant No. 11DZ2230700.

语种：英文

摘要：Light sterile neutrinos of mass about an eV with mixing (U) over tilde (ls) of a few percent to active neutrinos may solve some anomalies shown in experimental data related to neutrino oscillation. How to have light sterile neutrinos is one of the theoretical problems which have attracted a lot of attentions. In this article we show that such an eV scale light sterile neutrino candidate can be obtained in a seesaw model in which the right-handed neutrinos satisfy a softly-broken Friedberg-Lee (FL) symmetry. In this model a right-handed neutrino is guaranteed by the FL symmetry to be light comparing with other two heavy right-handed neutrinos. It can be of eV scale when the FL symmetry is softly broken and can play the role of eV scale sterile neutrino needed for explaining the anomalies of experimental data. This model predicts that one of the active neutrino is massless. We find that this model prefers inverted hierarchy mass pattern of active neutrinos than normal hierarchy. An interesting consequence of this model is that realizing relatively large vertical bar(U) over tilde (es)vertical bar and relatively small vertical bar(U) over tilde (mu s)vertical bar in this model naturally leads to a relatively small vertical bar(U) over tilde (tau s)vertical bar. This interesting prediction can be tested in future atmospheric or solar neutrino experiments. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.