论文标题
用$^8 $ be和$^4 $ he异常过渡的暗物质对银河伽玛射线过量的解释
Interpretation of the Galactic gamma-ray excess with the dark matter indicated by $^8$Be and $^4$He anomalous transitions
论文作者
论文摘要
长期存在的银河中心伽马射线过量可以通过GEV暗物质（DM）歼灭来解释，而DM解释似乎与来自不同天文规模观测值的最近的联合限制，例如矮球星系，例如乳状halo和星系组/集群/集群。由$^8 $ be和$^4 $ HE异常过渡的激励，并可能由矢量波森$ x $介导的新互动，我们认为一小部分DM主要将DM歼灭成一对shell vector Boson $ x $ x $，然后是$ x \ to $ x \ to e^+ e^ - $。银河中心伽马射线过量由这种DM级联歼灭来解释。伽马射线主要来自康普顿逆散射发射，DM级联反应可能与关节的天体物理限制兼容，同时由AMS-02正电子观察允许。还讨论了该模型的直接检测。
The long-standing Galactic center gamma-ray excess could be explained by GeV dark matter (DM) annihilation, while the DM interpretation seems in tension with recent joint limits from different astronomical scale observations, such as dwarf spheroidal galaxies, the Milky Way halo and galaxy groups/clusters. Motivated by $^8$Be and $^4$He anomalous transitions with possible new interactions mediated by a vector boson $X$, we consider a small fraction of DM mainly annihilating into a pair of on-shell vector boson $X X$ followed by $X \to e^+ e^-$ in this paper. The Galactic center gamma-ray excess is explained by this DM cascade annihilation. The gamma rays are mainly from Inverse Compton Scattering emission, and the DM cascade annihilation could be compatible with joint astrophysical limits and meanwhile be allowed by the AMS-02 positron observation. The direct detection of this model is also discussed.
