通过X射线观测半人马座Alpha的X射线观测,寻找与轴子类似的粒子
Yu-Xuan Chen1,2, Lei Lei1,2, Zi-Qing Xia1
1Purple Mountain Observatory, Key Laboratory of Dark Matter and Space Astronomy, Chinese Academy of Sciences, Nanjing 210033, China.
Physical review letters
|July 31, 2025
概括
我们搜索了来自半角星座Alpha的X射线衰变为axionlike粒子 (ALP). 我们的零结果为这些奇异粒子相互作用设定了新的极限,改善了ALP-光子合的约束.
科学领域:
- 粒子天体物理学 粒子天体物理学
- 恒星天体物理学 恒星天体物理学
- 高能物理学的高能物理学
背景情况:
- 轴状粒子 (ALP) 是可在恒星核心中产生的假设粒子.
- ALP与电磁场和电子相互作用,其质量通常在0.1到10 keV之间.
- 这些粒子可以被引力困在恒星轨道上,并分解成两个光子,产生单色X射线线.
研究的目的:
- 为了寻找引力捕获的ALP,在半人马座Alpha二进制星系中分解成光子.
- 对ALP相互作用,特别是ALP-光子和ALP-电子合建立新的严格限制.
- 为了利用像Chandra和eROSITA这样的敏感X射线探测器进行这个搜索.
主要方法:
- 通过敏感的X射线探测器观测太阳二进制星系.
- 分析单色线信号的0.2 keV到10 keV的能量范围内的X射线数据.
- 将观察到的数据与ALP分解成光子的理论预测进行比较.
主要成果:
- 在观察到的能量范围内没有检测到任何显著的ALP衰变信号.
- 该研究确定了迄今为止对ALP相互作用的最严格的限制.
- 改善了ALP-电子合 (g_aee) ≤10−15的ALP-光子合 (g_aee) 在2keV时的ALP-光子合 (g_aγγ) 极限,高达2个数量级,对于更大的g_aee.ee,限制更为严格.
结论:
- 无效结果对轴状粒子的特性和相互作用产生了显著的约束.
- 这项研究通过探测天体物理环境中的奇异粒子相互作用来推进我们对基本物理学的理解.
- 这些发现突显了X射线天文学在寻找超越标准模型的新物理学的潜力.
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