论文标题
通过大型麦哲伦云的无线电连续频谱来限制歼灭暗物质
Constraining annihilating dark matter by radio continuum spectrum of the Large Magellanic Cloud
论文作者
论文摘要
最近的无线电观察获得了严格的约束，以消灭暗物质。在本文中，我们使用大型麦哲伦云（LMC）的无线电连续光谱数据来分析暗物质歼灭信号。我们已经发现了一个略有正面的暗物质an灭信号，其统计意义为$1.5σ$。总体最佳拟合暗物质质量为$ m _ {\ rm dm} \约90 $ gev，通过$ b \ bar {b} $ Channel an灭。我们还用标准的热暗物质批准了$3σ$的下限，并使用标准的热暗物质歼灭横截面，用于$ e^+e^ - $，$μ^+μ^ - $，$τ^+τ^+τ^ - $和$ b \ bar {b} $ channels。
Recent radio observations have obtained stringent constraints for annihilating dark matter. In this article, we use the radio continuum spectral data of the Large Magellanic Cloud (LMC) to analyze the dark matter annihilation signals. We have discovered a slightly positive signal of dark matter annihilation with a $1.5σ$ statistical significance. The overall best-fit dark matter mass is $m_{\rm DM} \approx 90$ GeV, annihilating via $b\bar{b}$ channel. We have also constrained the $3σ$ lower limits of dark matter mass with the standard thermal dark matter annihilation cross section for the $e^+e^-$, $μ^+μ^-$, $τ^+τ^-$ and $b\bar{b}$ channels.
