使用皮埃尔·奥格天文台搜索ANITA检测到的异常事件
A Abdul Halim1, P Abreu2, M Aglietta3,4
1University of Adelaide, Adelaide, South Australia, Australia.
Physical review letters
|April 11, 2025
概括
研究人员使用皮埃尔·奥格尔天文台寻找上升的风暴,其动机是异常的ANITA事件. 检测到一个事件,与背景一致,为宇宙射线流量设置上限.
科学领域:
- 天体粒子物理学的物理学
- 宇宙射线物理学 宇宙射线物理学
- 高能天体物理学 高能天体物理学
背景情况:
- 由ANITA (先进的国家冰淋跟踪阵列) 实验观察到的两个异常无线电脉冲表明了粒子物理学的标准模型的潜在偏差.
- 这些异常事件被解释为可能源于上升的空气淋浴.
- 皮埃尔·奥格尔天文台的光探测器被用来寻找这样的事件.
研究的目的:
- 在超高能量 (E > 0.1 EeV) 和大的顶峰角度 (> 110°) 进行上升式空气淋浴的专用搜索.
- 测试假设ANITA异常事件是上升的宇宙射线雨.
- 为了建立上升的宇宙射线流的上限.
主要方法:
- 利用了皮埃尔·奥格尔天文台的光探测器的数据.
- 开发了一个选择程序,使用对常规宇宙射线雨和上升事件的模拟来识别候选事件.
- 计算了0.1到33 EeV的能量范围内的上升事件的暴露.
主要成果:
- 在2004年1月1日至2018年12月31日期间发现了一个候选事件.
- 这一观察到的事件与预期的0.27±0.12事件的背景相一致,这些事件来自错误重建的宇宙射线雨.
- 对于不同的光谱指数 (E−1和E−2) 设置了上升阵雨积分流的上限.
结论:
- 搜索没有发现上升的空气淋浴超出预期的背景没有显著的过剩.
- 结果强烈不同意ANITA异常事件是上升的暴雨的解释,特别是在更的光谱 (E-3和E-5) 中.
- 该研究对潜在上升的宇宙射线的流量设置了严格的限制,限制了新的物理场景.
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