标题： CTAO对蒸发原初黑洞检测的前景灵敏度 显示英文标题

标题： Prospective sensitivity of CTAO on detection of evaporating primordial black holes

摘要： 随着黑洞寿命的减少，它发出的霍金辐射的能量增加，最终以强烈的伽马射线爆发形式消失。 对于初始质量为$\sim 5\times10^{14}$克的原初黑洞（PBHs），它们的寿命预计会在当前时期结束。 探测这种PBH爆发将提供其存在的有力证据。 切连科夫望远镜阵列观测站（CTAO）有潜力在伽马射线谱的高能端观测到这些爆发。 为了研究这种可能性，我们进行了一项研究，以评估CTAO对本地爆发率密度的敏感性。 我们的结果表明，在为期5年的观测计划中，CTAO可以排除超过$\sim 36\ \mathrm{pc}^{-3}\ \mathrm{yr}^{-1}$的本地爆发率密度，这比大型高海拔空气簇射观测站（LHAASO）设定的上限提高了整整一个数量级。 此外，我们提出了一种优化的观测策略，用于检测PBH爆发。 显示英文摘要

摘要： As the lifetime of a black hole decreases, the energy of the Hawking radiation it emits increases, ultimately culminating in its disappearance through a powerful burst of gamma rays. For primordial black holes (PBHs) with an initial mass of $\sim 5\times10^{14}$ g, their lifespans are expected to end in the present epoch. Detecting such PBH bursts would provide compelling evidence of their existence. The Cherenkov Telescope Array Observatory (CTAO) has the potential to observe these bursts at the high-energy end of the gamma-ray spectrum. To investigate this possibility, we conduct a study to evaluate the sensitivity of CTAO to the local burst rate density of PBHs. Our results suggest that during a 5-year observational campaign, CTAO could exclude a local burst rate density exceeding $\sim 36\ \mathrm{pc}^{-3}\ \mathrm{yr}^{-1}$, which represents an improvement of one order of magnitude over the upper limit set by the Large High Altitude Air Shower Observatory (LHAASO). In addition, we propose an observation strategy optimized for detecting PBH bursts.