We pioneer the black hole mass gap as a powerful new tool for constraining new particles. A new particle that couples to the Standard Model – such as an axion – acts as an additional source of loss in the cores of population-III stars, suppressing mass lost due to winds and quenching the pair-instability. This results in heavier astrophysical black holes. As an example, using stellar simulations we show that the solar axion explanation of the recent XENON1T excess implies astrophysical black holes of $\sim 56{\mathrm{M}}_{\odot }$, squarely within the black hole mass gap predicted by the Standard Model.

中文翻译：

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轴心失踪：XENON1T的大黑洞在哪里？

我们率先将黑洞质量差距作为约束新粒子的强大新工具。耦合到标准模型的新粒子（例如轴）成为III号星体核心的附加损耗源，从而抑制了由于风造成的质量损失并消除了对不稳定的影响。这导致天体物理黑洞变重。例如，使用恒星模拟，我们证明了近期XENON1T过量的日光轴解释说明了天体的黑洞。$〜56{\mathrm{中号}}_{\odot }$，正好在标准模型预测的黑洞质量差距之内。