标题： 从AMS-02 $\bar{p}/p$ 比率推测暗物质湮灭的影响 显示英文标题

标题： Implications for dark matter annihilation from the AMS-02 $\bar{p}/p$ ratio

摘要： AMS-02合作组刚刚发布了精度高达$\sim 450$GeV 的宇宙反质子与质子比值$\bar{p}/p$。 在这项工作中，我们计算了由宇宙射线与星际介质相互作用产生的次级反质子，并考虑了宇宙射线传播带来的不确定性。 这些过程预测的$\bar{p}/p$比率在某些传播参数区域与AMS-02数据存在一些张力，但过剩并不显著。 然后，我们尝试从$\bar{p}/p$数据或数据青睐的信号区域内推导暗物质湮灭截面的上限。 结果表明，AMS-02数据得出的约束与Fermi-LAT矮星系观测得到的约束相似。 通常要求暗物质的信号区域能量为$m_\chi \sim O(10)$TeV 并且$\left<\sigma v\right>\sim\mathcal{O}(10^{-23})~\cm^3~\sec^{-1}$。 显示英文摘要

摘要： The AMS-02 collaboration has just released the cosmic antiproton to proton ratio $\bar{p}/p$ with a high precision up to $\sim 450$ GeV. In this work, we calculate the secondary antiprotons generated by cosmic ray interactions with the interstellar medium taking into account the uncertainties from the cosmic ray propagation. The $\bar{p}/p$ ratio predicted by these processes shows some tension with the AMS-02 data in some regions of propagation parameters, but the excess is not significant. We then try to derive upper bounds on the dark matter annihilation cross section from the $\bar{p}/p$ data or signal regions favored by the data. It is shown that the constraint derived by the AMS-02 data is similar to that from Fermi-LAT observations of dwarf galaxies. The signal region for dark matter is usually required $m_\chi \sim O(10)$ TeV and $\left<\sigma v\right>\sim\mathcal{O}(10^{-23})~\cm^3~\sec^{-1}$.