Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade
Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade
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DOI：
10.1088/1475-7516/2020/08/035
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发表时间：
2020-02
影响因子：
6.4
通讯作者：
P. Doetinchem;K. Perez;T. Aramaki;S. Baker;S. Barwick;R. Bird;M. Boezio;S. Boggs;M. Cui;
中科院分区：
文献类型：
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作者：
P. Doetinchem;K. Perez;T. Aramaki;S. Baker;S. Barwick;R. Bird;M. Boezio;S. Boggs;M. Cui;
宇宙射线反核的精确测量是识别暗物质和其他新的天体物理现象的重要手段，可以与其他宇宙射线物种一起了解宇宙射线在银河系中的产生和传播。例如，低能反氘核将提供暗物质湮灭或衰变的“确凿证据”，基本上不受天体物理学背景的影响。近年来的研究强调，宇宙射线反氘核的模型必须与丰富的宇宙反质子和任何可能的反氦观测一起考虑。因此，2019年3月在加州大学洛杉矶分校组织了第二次专门的反氘核研讨会，汇集了一个理论家和实验家社区，以回顾当前宇宙射线反核观测的现状，理解这些特征的理论工作，以及即将进行的测量以阐明持续争议的潜力。这篇综述的目的是综合这些最近的工作，并提出对未来十年的反核观测和搜索的影响。这包括对AMS-02反质子谱中可能存在的暗物质特征的讨论，BESS Polar-II对宇宙反氘核通量的最新限制，以及AMS-02对候选反氦事件的报告；与反核生产模型相关的最新对撞机和宇宙射线测量；基于AMS-02和旅行者号数据的宇宙射线输运模型的现状；以及即将进行的实验，如gap的前景。这为未来几年暗物质的宇宙反核特征的进展提供了路线图。
The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and propagation in the Galaxy. For instance, low-energy antideuterons would provide a “smoking gun” signature of dark matter annihilation or decay, essentially free of astrophysical background. Studies in recent years have emphasized that models for cosmic-ray antideuterons must be considered together with the abundant cosmic antiprotons and any potential observation of antihelium. Therefore, a second dedicated Antideuteron Workshop was organized at UCLA in March 2019, bringing together a community of theorists and experimentalists to review the status of current observations of cosmic-ray antinuclei, the theoretical work towards understanding these signatures, and the potential of upcoming measurements to illuminate ongoing controversies. This review aims to synthesize this recent work and present implications for the upcoming decade of antinuclei observations and searches. This includes discussion of a possible dark matter signature in the AMS-02 antiproton spectrum, the most recent limits from BESS Polar-II on the cosmic antideuteron flux, and reports of candidate antihelium events by AMS-02; recent collider and cosmic-ray measurements relevant for antinuclei production models; the state of cosmic-ray transport models in light of AMS-02 and Voyager data; and the prospects for upcoming experiments, such as GAPS. This provides a roadmap for progress on cosmic antinuclei signatures of dark matter in the coming years.