论文标题
暗物质歼灭可以通过$ \barλ_b$衰减产生可检测到的抗较高通量
Dark Matter Annihilation Can Produce a Detectable Antihelium Flux through $\barΛ_b$ Decays
论文作者
论文摘要
Alpha磁光谱仪（AMS-02）最近观察到了暂时检测到的少数宇宙射线抗eandium事件。长期以来，这些事件一直被认为是新物理学的吸烟证据，因为预计天体物理抗较高的抗高细胞可以忽略不计。然而，预计暗物质引起的抗透射量也将低于当前敏感性，尤其是鉴于现有的抗蛋白质约束。在这里，我们证明了先前被忽视的标准模型过程 - 通过$ \barλ_b$ -baryons的流离失所的vertex衰减产生抗ia，可以显着增强暗物质诱导的抗细胞通量。该过程可以将抗较高的标准及时产生及时产生三倍，更重要的是，完全主导了AMS-02报道的高能量抗细胞核的产生。
Recent observations by the Alpha Magnetic Spectrometer (AMS-02) have tentatively detected a handful of cosmic-ray antihelium events. Such events have long been considered as smoking-gun evidence for new physics, because astrophysical antihelium production is expected to be negligible. However, the dark-matter-induced antihelium flux is also expected to fall below current sensitivities, particularly in light of existing antiproton constraints. Here, we demonstrate that a previously neglected standard model process -- the production of antihelium through the displaced-vertex decay of $\barΛ_b$-baryons -- can significantly boost the dark matter induced antihelium flux. This process can triple the standard prompt-production of antihelium, and more importantly, entirely dominate the production of the high-energy antihelium nuclei reported by AMS-02.
