Constraining feeble neutrino interactions with ultralight dark matter

被引：13
作者：
Dev, Abhish [1 ]
Krnjaic, Gordan [1 ,2 ,3 ]
Machado, Pedro [1 ]
Ramani, Harikrishnan [4 ]
机构：
[1] Fermilab Natl Accelerator Lab, Theoret Phys Dept, Batavia, IL 60510 USA
[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[3] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[4] Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USA
来源：
PHYSICAL REVIEW D | 2023年 / 107卷 / 03期
基金：
欧盟地平线“2020”;
关键词：
STERILE NEUTRINOS; OSCILLATIONS; BOUNDS;
D O I：
10.1103/PhysRevD.107.035006
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
If ultralight (MUCH LESS-THAN eV), bosonic dark matter couples to right-handed neutrinos, active neutrino masses and mixing angles depend on the ambient dark matter density. When the neutrino Majorana mass, induced by the dark matter background, is small compared to the Dirac mass, neutrinos are "pseudo-Dirac" fermions that undergo oscillations between nearly degenerate active and sterile states. We present a complete cosmological history for such a scenario and find severe limits from a variety of terrestrial and cosmological observables. For scalar masses in the "fuzzy" dark matter regime (similar to 10-20 eV), these limits exclude couplings of order 10-30, corresponding to Yukawa interactions comparable to the gravitational force between neutrinos and surpassing equivalent limits on time variation in scalar-induced electron and proton couplings.
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页数：9
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