文献类型：期刊文献

英文题名：Symmetry, dark matter, and LHC phenomenology of the minimal νSM

作者：He, Xiao-Gang[1,3,4];Li, Tong[4];Liao, Wei[2,4]

机构：[1]Natl Taiwan Univ, Dept Phys, Taipei, Taiwan;[2]E China Univ Sci & Technol, Inst Modern Phys, Shanghai 200237, Peoples R China;[3]Natl Taiwan Univ, Ctr Theoret Sci, Taipei, Taiwan;[4]Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

年份：2010

卷号：81

期号：3

外文期刊名：PHYSICAL REVIEW D

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000275069000017)】；

基金：This work is supported in part by NSC and NCTS, the Science and Technology Commission of Shanghai Municipality under Contract No. 09PJ403800 and National Science Foundation of China (NSFC), Grant No. 10975052.

语种：英文

摘要：A sterile neutrino with a mass of a few keV can play the role of warm dark matter (DM). This can be realized in seesaw models with 3 left-and 3 right-handed neutrinos. It is possible to identify the keV neutrino to be one of the right-handed neutrinos leaving the other two to be much more heavier, the nu SM model. We show that with this realization of keV neutrino DM, the model has an approximate Friedberg-Lee symmetry providing a natural explanation for the lightness of the right-handed neutrino. We also find that in this model the mixing parameters couple light and heavy neutrinos are strongly correlated, and can be large enough to have testable effects at the LHC for the two heavy right-handed neutrinos to be in the hundred-GeV range.