论文标题
消灭暗物质的抗deuterons和抗螺旋核
Anti-Deuterons and Anti-Helium Nuclei from Annihilating Dark Matter
论文作者
论文摘要
相对于标准天体物理模型的预测，对宇宙射线抗蛋白抗蛋白与蛋白质比率的最新研究已经确定了$ \ sim $ 10-20 $ 10-20 GEV抗抗原子。有趣的是，这种过度的性质与相同的暗物质模型一致，这些暗物质模型可以说明从银河中心观察到的长期过量的$γ$ rays。这种暗物质候选者还可以产生抗脱叶核和抗固有核的大量通量。在这里，我们从天体物理过程以及暗物质歼灭中研究了此类颗粒的生产和运输。 Importantly, in the case of AMS-02, we find that Alfvénic reacceleration (i.e., diffusion in momentum space) can boost the expected number of $\bar{\rm d}$ and ${}^{3}\overline{\textrm{He}}$ events from annihilating dark matter by an order of magnitude or more.对于相对较大的Alfvén速度值，对于能够产生抗蛋白质和$γ$ - 雷过量的暗物质候选者，我们预计歼灭会产生一些反deuteron事件，并在AMS-02数据的六年中产生大约一个反庇护事件。鉴于AMS-02合作的最新报道描述了许多反海物候选事件的发现，这一点尤其有趣。
Recent studies of the cosmic-ray antiproton-to-proton ratio have identified an excess of $\sim$10-20 GeV antiprotons relative to the predictions of standard astrophysical models. Intriguingly, the properties of this excess are consistent with the same range of dark matter models that can account for the long-standing excess of $γ$-rays observed from the Galactic Center. Such dark matter candidates can also produce significant fluxes of anti-deuterium and anti-helium nuclei. Here we study the production and transport of such particles, both from astrophysical processes as well as from dark matter annihilation. Importantly, in the case of AMS-02, we find that Alfvénic reacceleration (i.e., diffusion in momentum space) can boost the expected number of $\bar{\rm d}$ and ${}^{3}\overline{\textrm{He}}$ events from annihilating dark matter by an order of magnitude or more. For relatively large values of the Alfvén speed, and for dark matter candidates that are capable of producing the antiproton and $γ$-ray excesses, we expect annihilations to produce a few anti-deuteron events and about one anti-helium event in six years of AMS-02 data. This is particularly interesting in light of recent reports from the AMS-02 Collaboration describing the detection of a number of anti-helium candidate events.
