arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.00441astro-ph.HE
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根据最近的AMS-02数据的星系晕大小

Galactic halo size in the light of recent AMS-02 data

N. Weinrich, M. Boudaud, L. Derome, Y. Génolini, J. Lavalle, D. Maurin, P. Salati, P. Serpico, G. Weymann-Despres

摘要:

银河系垂直扩散晕的大小,$L$,是暗物质间接搜索的关键参数。由于最近的AMS-02数据,可以更好地确定它。我们从Be/B和$^{10}$ Be/Be数据对$L$设置约束,并与正电子数据进行一致性检查。我们详细介绍了Be/B和$^{10}$ Be/Be对$L$的依赖性,并预测了哪些能量范围的更好的数据将有助于未来$L$的改进。我们使用USINE v3.5进行原子核的传播,并使用Boudaud等人(2017)的pinching方法计算$e^+$。当前AMS-02 Be/B($\sim3\%$精密度)和ACE-CRIS $^{10}$ Be/Be($\sim 10\%$精密度)数据对$L$产生了相似且一致的约束。AMS-02 Be/B数据单独将$L=5^{+3}_{-2}$ ~kpc限制在68%的置信水平(跨越不同的基准输运构型),在这个范围内,大多数模型不会过量产生正电子。未来的实验需要在$^{10}$ Be/ $^9$ Be低于10 GV的任何地方提供100 μ m级的精度,以进一步约束$L$。即将发布的AMS-02、HELIX和PAMELA $^{10}$ Be/ $^9$ Be结果将进一步测试并可能收紧此处推导出的限制。涉及具有不同寿命的放射性物质(例如Al/Mg和Cl/Ar)的元素比也在等待提供互补和robuster约束。

英文摘要:

The vertical diffusive halo size of the Galaxy, $L$, is a key parameter for dark matter indirect searches. It can be better determined thanks to recent AMS-02 data. We set constraints on $L$ from Be/B and $^{10}$Be/Be data, and we performed a consistency check with positron data. We detail the dependence of Be/B and $^{10}$Be/Be on $L$ and forecast on which energy range better data would be helpful for future $L$ improvements. We used USINE v3.5 for the propagation of nuclei, and $e^+$ were calculated with the pinching method of Boudaud et al. (2017). The current AMS-02 Be/B ($\sim3\%$ precision) and ACE-CRIS $^{10}$Be/Be ($\sim 10\%$ precision) data bring similar and consistent constraints on $L$. The AMS-02 Be/B data alone constrain $L=5^{+3}_{-2}$~kpc at a 68\% confidence level (spanning different benchmark transport configurations), a range for which most models do not overproduce positrons. Future experiments need to deliver percent-level accuracy on $^{10}$Be/$^9$Be anywhere below 10 GV to further constrain $L$. Forthcoming AMS-02, HELIX, and PAMELA $^{10}$Be/$^9$Be results will further test and possibly tighten the limits derived here. Elemental ratios involving radioactive species with different lifetimes (e.g. Al/Mg and Cl/Ar) are also awaited to provide complementary and robuster constraints.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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