Earth as a transducer for axion dark-matter detection
Earth as a transducer for axion dark-matter detection
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DOI：
10.1103/physrevd.105.095007
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发表时间：
2021-12
影响因子：
5
通讯作者：
Ariel Arza;M. Fedderke;P. Graham;Derek F. Jackson Kimball;Saarik Kalia
中科院分区：
文献类型：
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作者：
Ariel Arza;M. Fedderke;P. Graham;Derek F. Jackson Kimball;Saarik Kalia
我们证明，在地球背景地磁场存在的情况下，与光子耦合的超轻轴子暗物质会引起振荡的全球地磁场信号。这个信号在结构上类似于Fedderke等人最近指出并寻找的暗光子暗物质。理论物理。Rev. D 104, 075023(2021)]和[Fedderke等人]。理论物理。Rev. D 104, 095032(2021)]。它有一个由地球地磁场固定的全球矢量模式，在长时间尺度上是时间相干的，并且有一个由轴子质量确定的频率。在这项工作中，我们计算了详细的信号模式，并在SuperMAG协作组织维护的磁力计网络数据中进行了该信号的搜索。我们的分析没有发现在2 × 10−18 eV (cid:46) ma (cid:46) 7 × 10−17 eV范围内存在轴子暗物质信号的有力证据。假设轴子是所有的暗物质，我们在相同质量范围内对轴子-光子耦合g γ施加约束；在最强烈的情况下，对于质量为3 × 10−17 eV (cid:46) m (cid:46) 4 × 10−17 eV，这些约束与得到的约束相当
(Dated: We demonstrate that ultralight axion dark matter with a coupling to photons induces an oscillating global terrestrial magnetic-field signal in the presence of the background geomagnetic field of the Earth. This signal is similar in structure to that of dark-photon dark matter that was recently pointed out and searched for in [Fedderke et al. Phys. Rev. D 104 , 075023 (2021)] and [Fedderke et al. Phys. Rev. D 104 , 095032 (2021)]. It has a global vectorial pattern fixed by the Earth’s geomagnetic field, is temporally coherent on long timescales, and has a frequency set by the axion mass m a . In this work, we both compute the detailed signal pattern, and undertake a search for this signal in magnetometer network data maintained by the SuperMAG Collaboration. Our analysis identifies no strong evidence for an axion dark-matter signal in the axion mass range 2 × 10 − 18 eV (cid:46) m a (cid:46) 7 × 10 − 17 eV. Assuming the axion is all of the dark matter, we place constraints on the axion–photon coupling g aγ in the same mass range; at their strongest, for masses 3 × 10 − 17 eV (cid:46) m a (cid:46) 4 × 10 − 17 eV, these constraints are comparable to those obtained