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arXiv 2302.06159hep-ph
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来自半湮灭的轻暗物质 MeV Gamma-Ray 约束

MeV Gamma-Ray Constraints for Light Dark Matter from Semi-Annihilation

Jun Guo, Lei Wu, Bin Zhu

AI总结:

本研究探讨质量在 1 MeV 至 1 GeV 的复标量轻暗物质通过半湮灭产生的机制,利用 COMPTEL、EGRET 等五个实验数据源约束其湮灭截面,发现 EGRET 提供严格约束而 e-ASTROGAM 未来可探测整个参数空间。

摘要:

探索暗物质研究领域,质量在 1 MeV 至 1 GeV 范围内的轻暗物质在理论和实验上都是一个引人入胜的课题。我们假设轻暗物质由复标量组成,并通过半湮灭产生,这一过程接近 MeV Gamma-ray 卫星的尺度,使我们得以探索该假设的物理意义。我们用于约束该情景的实验数据来自五个不同来源:COMPTEL、EGRET、INTEGRAL、Fermi Gamma-ray Space Telescope 以及 e-ASTROGAM 的未来探测能力。我们使用解析公式测量 X 射线谱,从而针对暗物质和中介质量的不同组合,将湮灭截面限制范围确定在 $10^{-28}\mathrm{cm}^3/\mathrm{s}$ 至 $10^{-22}\mathrm{cm}^3/\mathrm{s}$ 之间。我们发现 MeV gamma-ray 为半湮灭暗物质的结构提供了有价值的见解,其中 EGRET 对半湮灭给出了严格约束,而 e-ASTROGAM 的未来探测能力有望探测该模型的整个参数空间。

英文摘要:

Exploring the realm of Dark Matter research, Light DM, which has a mass in the range of 1 MeV to 1 GeV, is a fascinating topic both theoretically and experimentally. We assume that the light dark matter is composed of complex scalars and produced from semi-annihilation, which is close to the scale of the MeV Gamma-ray satellite, allowing us to explore the implications of this hypothesis. The experimental data we used to constrain the scenario is from five different sources: the COMPTEL, EGRET, INTEGRAL, Fermi Gamma-ray Space Telescope, and the e-ASTROGAM future reach. We use the analytical formula to measure the X-ray spectra allowing us to determine the annihilation cross-section bounds from $10^{-28}\mathrm{cm}^3/\mathrm{s}$ to $10^{-22}\mathrm{cm}^3/\mathrm{s}$ for different combinations of dark matter and mediator masses. We found that the MeV gamma-ray provides valuable insight into the structure of the semi-annihilation dark matter, where EGRET contributes to the stringent constraint to the semi-annihilation, and the e-ASTROGAM future reach could probe the whole parameter space of the model.

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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