Tight bonds between sterile neutrinos and dark matter
Tight bonds between sterile neutrinos and dark matter
复制标题
DOI：
10.1088/1475-7516/2014/07/042
复制
发表时间：
2013-12
影响因子：
6.4
通讯作者：
T. Bringmann;Jasper Hasenkamp;J. Kersten
中科院分区：
文献类型：
--
作者：
T. Bringmann;Jasper Hasenkamp;J. Kersten
尽管标准ΛCDM宇宙学取得了惊人的成功，但越来越多的证据表明，中小尺度的观测存在紧张关系。我们引入了一个简单的模型，其中冷暗物质（DM）和不育中微子都在一个新的U（1）X规范相互作用下带电。由此产生的DM自相互作用解决了与观测到的丰度和矮星系的内部密度结构的紧张局势。同时，不育中微子可以解释宇宙学观测所青睐的小的热DM分量和短基线实验中发现的中微子异常。
Despite the astonishing success of standard ΛCDM cosmology, there is mounting evidence for a tension with observations at small and intermediate scales. We introduce a simple model where both cold dark matter (DM) and sterile neutrinos are charged under a new U(1)X gauge interaction. The resulting DM self-interactions resolve the tension with the observed abundances and internal density structures of dwarf galaxies. At the same time, the sterile neutrinos can account for both the small hot DM component favored by cosmological observations and the neutrino anomalies found in short-baseline experiments.