arXiv 2104.061682021-04hep-phastro-ph.HE

Sub-GeV暗物质模型的精确Gamma-Ray约束

Precision Gamma-Ray Constraints for Sub-GeV Dark Matter Models

Adam Coogan, Logan Morrison, Stefano Profumo

备注：: Minor updates, matches published version; 20 pages, 4 figures
发表信息：: JCAP08(2021)044
DOI：: 10.1088/1475-7516/2021/08/044

摘要：

间接探测质量低于GeV的暗物质粒子最近受到了极大的关注。未来的星载伽马射线望远镜，包括All-Sky-ASTROGAM、AMEGO和GECCO，将以前所未有的精度探测MeV伽马射线天空，为MeV-GeV质量范围内的粒子暗物质提供令人兴奋的测试。虽然通常假设暗物质只会湮灭成一种标准模型的最终状态，但现实的暗物质模型并非如此。在这项工作中，我们分析了现有的间接检测的限制和发现达到未来的探测器的动机良好的希格斯粒子和矢量门户模型使用我们公开的代码Hazma。特别是，我们展示了如何利用手征微扰理论来计算暗物质的自湮灭截面到含有介子的最终状态，强相互作用的标准模型动力学自由度低于GeV尺度。我们发现，未来的望远镜可以探测比目前受宇宙微波背景、伽马射线和地面观测限制的小几个数量级的暗物质自湮灭截面。

英文摘要：

The indirect detection of dark matter particles with mass below the GeV scale has recently received significant attention. Future space-borne gamma-ray telescopes, including All-Sky-ASTROGAM, AMEGO, and GECCO, will probe the MeV gamma-ray sky with unprecedented precision, offering an exciting test of particle dark matter in the MeV-GeV mass range. While it is typically assumed that dark matter annihilates into only one Standard Model final state, this is not the case for realistic dark matter models. In this work we analyze existing indirect detection constraints and the discovery reach of future detectors for the well-motivated Higgs and vector-portal models using our publicly-available code Hazma. In particular, we show how to leverage chiral perturbation theory to compute the dark matter self-annihilation cross sections into final states containing mesons, the strongly-interacting Standard Model dynamical degrees of freedom below the GeV scale. We find that future telescopes could probe dark matter self-annihilation cross sections orders of magnitude smaller than those presently constrained by cosmic microwave background, gamma-ray and terrestrial observations.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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