轴子遗迹口袋的现象学
The phenomenology of Axion Relic Pockets
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中文总结 AI 辅助
本文研究轴子遗迹口袋作为暗物质的现象学，推导轴子-光子转换率，利用冰立方数据给出首个地面实验限制，并探讨多种探测前景。
中文摘要 AI 辅助
轴子遗迹口袋是相变残余物，由被热轴子气体稳定而免于坍缩的假真空区域组成。轴子遗迹口袋可以构成暗物质，但对其现象学知之甚少。我们考虑被困轴子与电磁作用的耦合，并推导出考虑口袋致密性和球面几何的轴子到光子转换率。作为案例研究，我们表明轴子-光子转换发生在原子电场中，导致高能电磁级联，这些级联可能被中微子、宇宙射线和暗物质实验探测到。电磁簇射的分布本质上是各向同性的，而上行簇射为模型提供了确凿的信号。利用冰立方中微子望远镜的最新数据，我们推导出地面实验对作为暗物质的轴子遗迹口袋的首个限制。然而，对于模型的最简单实现，只有参数空间的一小部分能产生足够强的信号以被当前数据约束。我们还评论了利用大气仪器和气球载荷的荧光及无线电切伦科夫探测，以及传统暗物质直接探测实验发现轴子遗迹口袋的前景。这些结果为在不同环境中启动轴子遗迹口袋的现象学研究提供了必要工具。
英文摘要
Axion relic pockets are phase-transition remnants consisting of regions of false vacuum stabilised from collapse by a hot axion gas. Axion relic pockets can comprise dark matter, but little is known about their phenomenology. We consider trapped axions coupled to electromagnetism and derive the axion to photon conversion rate accounting for the pocket's compactness and spherical geometry. As a case study, we show that axion-photon conversion occurs in atomic electric fields, leading to high-energy electromagnetic cascades that may be detectable by neutrino, cosmic-ray, and dark-matter experiments. The distribution of electromagnetic showers is inherently isotropic, and upward-going showers provide a smoking-gun signal for the model. Using recent data from the IceCube neutrino telescope, we derive the first limits from terrestrial experiments on axion relic pockets as dark matter. However, for the simplest realisation of the model, only a small part of the parameter space can give signals strong enough to be constrained by current data. We also comment on the prospects for discovering axion relic pockets using fluorescence and radio Cherenkov detection by atmospheric instruments and balloon-borne payloads, as well as traditional dark matter direct detection experiments. These results provide the necessary tools to initiate phenomenological studies of axion relic pockets across different environments.
发表机构
- Birzeit University（比尔宰特大学）
- Stockholm University（斯德哥尔摩大学）
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