论文标题
在H.E.S.S.中搜索暗物质歼灭信号内星系调查
Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey
论文作者
论文摘要
银河系的中心区域是寻找暗物质（DM）签名的最重要位置之一。我们报告了搜索DM粒子歼灭信号的第一个结果，该基因使用前所未有的伽马射线调查（GC）区域（$ {\ it I.E.} $），内部银河系调查（$ \ gtrsim $ 100 gtrsim $ 100 GEV）与H.E.S.S.S.S. S. S. S.五个基于基的Cherenkov望远镜的阵列。在2014 - 2020年数据集的搜索区域中未发现显着的伽马射线过量，并且对概况概率比率分析进行了以设置nihihitation Cross部分$ \langleσv\ rangle $的排除限制。假设Einasto和Navarro-frenk-White（NFW）DM密度分布在GC处，这些约束是迄今为止在TEV DM质量范围内获得的最强的。 For the Einasto profile, the constraints reach $\langle σv\rangle$ values of $\rm 3.7\times10^{-26} cm^3s^{-1}$ for 1.5 TeV DM mass in the $W^+W^-$ annihilation channel, and $\rm 1.2 \times 10^{-26} cm^3s^{-1}$ for $τ^+τ^ - $ nihilation通道中的0.7 TEV DM质量。与H.E.S.S.内部星系调查，基于地面的$γ$ ray观测值，因此探测$ \ langleσv\ rangle $ $ $ $ $ $ $ $ $值来自热relic nihihitric an灭的TEV DM颗粒。
The central region of the Milky Way is one of the foremost locations to look for dark matter (DM) signatures. We report the first results on a search for DM particle annihilation signals using new observations from an unprecedented gamma-ray survey of the Galactic Center (GC) region, ${\it i.e.}$, the Inner Galaxy Survey, at very high energies ($\gtrsim$ 100 GeV) performed with the H.E.S.S. array of five ground-based Cherenkov telescopes. No significant gamma-ray excess is found in the search region of the 2014-2020 dataset and a profile likelihood ratio analysis is carried out to set exclusion limits on the annihilation cross section $\langle σv\rangle$. Assuming Einasto and Navarro-Frenk-White (NFW) DM density profiles at the GC, these constraints are the strongest obtained so far in the TeV DM mass range. For the Einasto profile, the constraints reach $\langle σv\rangle$ values of $\rm 3.7\times10^{-26} cm^3s^{-1}$ for 1.5 TeV DM mass in the $W^+W^-$ annihilation channel, and $\rm 1.2 \times 10^{-26} cm^3s^{-1}$ for 0.7 TeV DM mass in the $τ^+τ^-$ annihilation channel. With the H.E.S.S. Inner Galaxy Survey, ground-based $γ$-ray observations thus probe $\langle σv\rangle$ values expected from thermal-relic annihilating TeV DM particles.
