Title: Gamma rays from Dark Matter Annihilation in Three-loop Radiative Neutrino Mass Generation Models Show Chinese title

Title: 暗物质湮灭产生的伽马射线在三圈辐射性中微子质量生成模型中

Abstract: We present the Sommerfeld enhanced Dark Matter (DM) annihilation into gamma ray for a class of three-loop radiative neutrino mass models with large electroweak multiplets where the DM mass is in O(TeV) range. We show that in this model, the DM annihilation rate becomes more prominent for larger multiplets and it is already within the reach of currently operating Imaging Atmospheric Cherenkov telescopes (IACTs), High Energy Stereoscopic System (H.E.S.S.). Furthermore, Cherenkov Telescope Array (CTA), which will begin operating in 2030, will improve this sensitivity by a factor of $\mathcal{O}{(10)}$ and may exclude a large portion of parameter space of this radiative neutrino mass model with larger electroweak multiplet. This implies that the only viable option is the model with lowest electroweak multiplets i.e. singlets of $SU(2)_{L}$ where the DM annihilation rate is not Sommerfeld enhanced and hence it is not yet constrained by the indirect detection limits from H.E.S.S. or future CTA. Show Chinese abstract

Abstract: 我们展示了属于一类具有大电弱多重态的三圈辐射型中微子质量模型的暗物质（DM）索末菲增强的伽马射线湮灭。在这种模型中，暗物质的质量处于 O(TeV) 范围内。 我们表明，在这个模型中，对于更大的多重态，暗物质的湮灭率变得更加显著，并且已经处于目前运行的切伦科夫望远镜成像系统（IACTs）、高能立体系统（H.E.S.S.）的探测范围之内。 此外，计划于2030年开始运行的切伦科夫望远镜阵列（CTA）将提高这一灵敏度$\mathcal{O}{(10)}$倍，并可能排除具有更大电弱多重态的这种辐射中微子质量模型的大片参数空间。 这意味着唯一可行的选择是具有最低电弱多重态的模型，即$SU(2)_{L}$的单态，其中暗物质的湮灭率没有索末菲增强，因此尚未受到来自 H.E.S.S. 或未来的 CTA 的间接探测限制约束。