改进的轴子-光子耦合

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-11-11 DOI:10.1038/s41550-024-02425-2

Bishwanath Gaire

引用次数: 0

摘要

轴子和类轴子粒子被认为是暗物质的候选粒子，但对它们的探测仍然遥不可及。它们有可能通过普里马科夫散射--光子与强电磁场的相互作用--在太阳内部产生。在最近的一项研究中，欧洲核子研究中心轴子太阳望远镜（CAST）合作小组报告了利用其轴子日像仪获得的轴子与光子之间耦合常数的新限制。作者从国际轴子观测站探路者收集数据，该探路者最近升级了微球Micromegas探测器，以降低背景噪声，并与X射线望远镜结合使用，该望远镜经过调谐，可探测约3千伏的光子。通过使用基于氙气的气体环境，背景减除也得到了改善。作者将这些数据与太阳轴心通量和 X 射线源的射线追踪模拟进行了比较。虽然他们正在寻找的事件并不存在（没有轴子信号），但这些测量结果为轴子-光子耦合极限提供了新的约束，即轴子质量≤ 0.02 eV时，轴子-光子耦合极限为5.7 × 10-11 GeV-1（置信度为95%）。这意味着未来的轴子搜索可以排除参数空间的更大区域。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

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