突破黑暗：利用西藏AS$_\gamma$和LHAASO-KM2A搜寻重的衰变暗物质
Breaking Dark: Hunting Heavy Decaying Dark Matter with Tibet AS$_γ$ and LHAASO-KM2A
AI总结：
利用西藏AS$_\gamma$远离银盘漫射伽马射线最新上限及LHAASO-KM2A对银盘漫射伽马射线的测量，对质量约$10^6 - 10^9$ GeV的衰变暗物质寿命施加严格限制，未来高能漫射伽马射线观测或能发现重的衰变暗物质。
摘要：
近期西藏AS$_\gamma$和LHAASO合作组对漫射亚PeV伽马射线的测量重塑了我们对伽马射线天空的理解。这些测量不仅揭示了‘PeVatrons’的本质，还能用于探测暗物质的非引力性质。PeV尺度的衰变暗物质能在末态产生高能伽马射线，利用西藏AS$_\gamma$对远离银盘的漫射伽马射线的最新上限以及LHAASO-KM2A对银盘漫射伽马射线的测量，我们对质量约为$10^6 - 10^9$ GeV的衰变暗物质寿命施加了严格限制。未来对高能漫射伽马射线发射的观测可提供更强限制或潜在发现重的衰变暗物质。
英文摘要：
Recent measurements of diffuse sub-PeV gamma-rays by the Tibet AS$_γ$ and LHAASO collaborations have reshaped our understanding of the gamma-ray sky. Besides uncovering the nature of `PeVatrons', these measurements can also be used to probe the non-gravitational nature of dark matter. PeV-scale decaying dark matter can produce high-energy gamma rays in the final state and contribute to the measurements made by extensive air-shower detectors like Tibet AS$_γ$ and LHAASO. Using the latest Tibet AS$_γ$ upper limits on diffuse gamma rays away from the Galactic plane and the LHAASO-KM2A measurements of diffuse gamma rays from the Galactic plane, we put stringent constraints on lifetimes of decaying DM for masses $\sim 10^6 - 10^9$ GeV. Future observations of high-energy diffuse gamma-ray emission can thus provide stronger limits or potentially discover heavy decaying dark matter.
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