Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr)
Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr)
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DOI：
10.1103/physrevx.4.021030
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发表时间：
2014-05-19
影响因子：
12.5
通讯作者：
Sushkov, Alexander O.
中科院分区：
文献类型：
--
作者：
Budker, Dmitry;Graham, Peter W.;Sushkov, Alexander O.
我们提出了一个寻找QCD轴子和类轴子暗物质的实验。与背景轴子暗物质相互作用的原子核获得随时间变化的CP奇核矩，例如电偶极矩。与核磁共振类似，这些力矩在电场存在下引起材料样品中的核自旋的进动。精确的磁力测量可以用来寻找这种进动。该实验的初始阶段可以覆盖超出当前天体物理和实验室限制的类轴粒子参数空间的许多数量级。利用现有的技术，我们提出的实验方案对小于或接近10（-9）eV的QCD轴子质量m（a）具有灵敏度，对应于理论上合理的大于或接近10（16）GeV的轴子衰变常数f（a）。随着进一步的改进，该实验最终可以覆盖小于或类似于μ V的质量m（a）的整个范围，与腔搜索互补。
We propose an experiment to search for QCD axion and axionlike-particle dark matter. Nuclei that are interacting with the background axion dark matter acquire time-varying CP-odd nuclear moments such as an electric dipole moment. In analogy with nuclear magnetic resonance, these moments cause precession of nuclear spins in a material sample in the presence of an electric field. Precision magnetometry can be used to search for such precession. An initial phase of this experiment could cover many orders of magnitude in axionlike-particle parameter space beyond the current astrophysical and laboratory limits. And with established techniques, the proposed experimental scheme has sensitivity to QCD axion masses m(a) less than or similar to 10(-9) eV, corresponding to theoretically well-motivated axion decay constants f(a) greater than or similar to 10(16) GeV. With further improvements, this experiment could ultimately cover the entire range of masses m(a) less than or similar to mu V, complementary to cavity searches.