Constraints on bosonic dark matter from ultralow-field nuclear magnetic resonance
Constraints on bosonic dark matter from ultralow-field nuclear magnetic resonance
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DOI：
10.1126/sciadv.aax4539
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发表时间：
2019-10-01
期刊：
影响因子：
13.6
通讯作者：
Budker, Dmitry
中科院分区：
文献类型：
--
作者：
Garcon, Antoine;Blanchard, John W.;Budker, Dmitry
暗物质是一种不可见的物质，占宇宙物质的80%以上，它的性质是现代物理学最基本的谜团之一。超轻玻色子，如轴子、类轴子粒子或暗光子可以构成大部分暗物质。这种玻色子和核自旋之间的耦合可以通过核磁共振（NMR）光谱学直接检测到它们：当核自旋穿过银河系暗物质晕时，它们与暗物质耦合，表现得就像它们处于振荡磁场中，产生暗物质驱动的NMR信号。作为宇宙轴子自旋进动实验（CASPEr）的一部分，基于NMR的暗物质搜索，我们使用超低场NMR探测轴子费米子“风”耦合和暗光子耦合到核自旋。在背景之上没有探测到暗物质信号，建立了暗物质玻色子的新实验边界，质量范围从1.8 x 10（-16）到7.8 x 10（-14）eV。
The nature of dark matter, the invisible substance making up over 80% of the matter in the universe, is one of the most fundamental mysteries of modern physics. Ultralight bosons such as axions, axion-like particles, or dark photons could make up most of the dark matter. Couplings between such bosons and nuclear spins may enable their direct detection via nuclear magnetic resonance (NMR) spectroscopy: As nuclear spins move through the galactic dark-matter halo, they couple to dark matter and behave as if they were in an oscillating magnetic field, generating a dark-matter-driven NMR signal. As part of the cosmic axion spin precession experiment (CASPEr), an NMR-based dark-matter search, we use ultralow-field NMR to probe the axion-fermion "wind" coupling and dark-photon couplings to nuclear spins. No dark matter signal was detected above background, establishing new experimental bounds for dark matter bosons with masses ranging from 1.8 x 10(-16) to 7.8 x 10(-14) eV.