Abstract In R-parity violating supersymmetry, the gravitino as the lightest supersymmetric particle (LSP) is a good candidate for dark matter, with the interesting characteristic to be detectable through γ-ray telescopes. We extend this analysis considering an axino next-to-LSP (NLSP) as a coexisting dark matter particle contributing with a detectable signal in the γ-ray spectrum. The analysis is carried out in the framework of the μνSSM, which solves the μ problem reproducing simultaneously neutrino data only with the addition of right-handed neutrinos. We find that important regions of the parameter space can be tested by future MeV-GeV γ-ray telescopes through the line signal coming from the decay of the axino NLSP into photon-neutrino. In a special region, a double-line signal from axino NLSP and gravitino LSP is possible with both contributions detectable.

中文翻译：

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MeV-GeV γ 射线望远镜探测 gravitino LSP 与共存的 axino NLSP 作为 μνSSM 中的暗物质

摘要 在违反超对称性的 R 奇偶性中，作为最轻的超对称粒子 (LSP) 的引力子是暗物质的良好候选者，具有可通过 γ 射线望远镜探测的有趣特性。我们扩展了这一分析，考虑到 LSP 旁边的轴突 (NLSP) 作为一种共存的暗物质粒子，在 γ 射线光谱中提供可检测的信号。分析是在 μνSSM 的框架内进行的，它解决了 μ 问题，仅通过添加右手中微子同时再现中微子数据。我们发现参数空间的重要区域可以被未来的 MeV-GeV γ 射线望远镜通过轴核 NLSP 衰变成光子-中微子的线信号进行测试。在一个特殊的地区，