Sterile neutrino dark matter via coinciding resonances
Sterile neutrino dark matter via coinciding resonances
复制标题
通过重合共振产生惰性中微子暗物质
DOI：
10.1088/1475-7516/2020/07/012
复制
发表时间：
2020
影响因子：
6.4
通讯作者：
M. Laine
中科院分区：
文献类型：
--
作者：
J. Ghiglieri;M. Laine
It has been proposed that two resonances could coincide in the early universe at temperatures T ∼ 0.2 … 0.5 GeV: one between two nearly degenerate GeV-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three sterile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.
