Sterile neutrino dark matter with dipole interaction
Sterile neutrino dark matter with dipole interaction
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DOI：
10.1103/physrevd.105.015016
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发表时间：
2021-08
影响因子：
5
通讯作者：
Wonsub Cho-;Kiyoung Choi;O. Seto
中科院分区：
文献类型：
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作者：
Wonsub Cho-;Kiyoung Choi;O. Seto
Osamu Seto‡北海道大学高等教育发展研究所，札幌060-0817，日本和北海道大学物理系，札幌060-0810，日本摘要我们考虑了最轻的惰性中微子暗物质与较重的惰性中微子具有偶极相互作用的可能性。生命周期足够长，可以在不违反其他限制的情况下成为暗物质候选者，并且可以在早期宇宙中产生正确数量的遗迹丰度。我们发现质量在MeV左右的惰性中微子和被Λ5和1015 GeV抑制的五维不可重整的偶极相互作用可能是暗物质的良好候选者，而质量在GeV数量级的较重的惰性中微子可以解释活跃的中微子振荡。
Osamu Seto‡ Institute for the Advancement of Higher Education, Hokkaido University, Sapporo 060-0817, Japan and Department of Physics, Hokkaido University, Sapporo 060-0810, Japan Abstract We consider the possibility of the lightest sterile neutrino dark matter which has dipole interaction with heavier sterile neutrinos. The lifetime can be long enough to be a dark matter candidate without violating other constraints and the correct amount of relic abundance can be produced in the early Universe. We find that a sterile neutrino with the mass of around MeV and the dimension-five non-renormalisable dipole interaction suppressed by Λ5 & 1015 GeV can be a good candidate of dark matter, while heavier sterile neutrinos with masses of the order of GeV can explain the active neutrino oscillations.