The discovery of gravitational waves from binary black hole mergers has renewed interest in primordial black holes forming a part of the dark matter density of our Universe. Various tests have been proposed to test this hypothesis. One of the cleanest tests is the lensing of fast radio bursts. In this situation, the presence of a compact object near the line of sight produces two images of the radio burst. If the images are sufficiently separated in time, this technique can constrain the presence of primordial black holes. One can also try to detect the lensed image of the mini-bursts within the main burst. We show that this technique can produce the leading constraints over a wide range in lens masses $\gtrsim$ 2 $M_\odot$ if the primordial black holes follow a single mass distribution. Even if the primordial black holes have an extended mass distribution, the constraints that can be derived from lensing of fast radio bursts will be the most constraining over wide ranges of the parameter space. We show that this technique can probe exotic compact boson stars and fermion stars made up of beyond the Standard Model particles. This search strategy is competitive and can provide the leading constraints on parts of the particle physics parameter space when compared with gravitational wave observations.

中文翻译：

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快速射电暴的透镜化：具有扩展质量函数和奇异致密费米子和玻色子星的新探测器对原始黑洞密度的未来限制

双黑洞合并引力波的发现重新引起了人们对构成我们宇宙暗物质密度一部分的原始黑洞的兴趣。已经提出了各种测试来检验这个假设。最干净的测试之一是快速射电暴的透镜化。在这种情况下，视线附近存在一个紧凑的物体会产生两个射电脉冲串的图像。如果图像在时间上充分分离，这种技术可以限制原始黑洞的存在。还可以尝试检测主爆发中微型爆发的透镜图像。我们表明，如果原始黑洞遵循单一质量分布，则该技术可以在透镜质量 $\gtrsim$ 2 $M_\odot$ 的广泛范围内产生主要约束。即使原始黑洞具有扩展的质量分布，可以从快速射电暴的透镜化得出的约束将在参数空间的广泛范围内受到最大的约束。我们表明，这种技术可以探测由超标准模型粒子组成的奇异致密玻色子星和费米子星。与引力波观测相比，这种搜索策略具有竞争力，并且可以提供对粒子物理参数空间部分的主要约束。