CMB μT cross correlations as a probe of primordial black hole scenarios
CMB μT cross correlations as a probe of primordial black hole scenarios
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DOI：
10.1103/physrevd.104.043526
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发表时间：
2021-04
影响因子：
5
通讯作者：
Ogan Özsoy;G. Tasinato
中科院分区：
文献类型：
--
作者：
Ogan Özsoy;G. Tasinato
我们提出了一种新方法，仅使用相对较大尺度的宇宙微波背景物理来探测原始黑洞（PBH）产生的暴胀模型。在 PBH 场景中，曲率扰动的原始功率谱轮廓的特征是明显下降，然后向小尺度快速增长，导致导致 PBH 形成的峰值。我们关注与峰值完全分离的倾角周围的尺度，以分析计算曲率功率谱和双谱的表达式。压缩双谱的大小在凹陷位置增强，并且获得了特征尺度依赖性，可以通过互相关 CMB μ 畸变和温度波动来探测。我们定量研究了这种互相关的特性以及它们如何依赖于基础模型，并讨论了如何通过下一代 CMB μ 畸变实验来测试它们。这种方法允许人们使用众所周知的 CMB 物理学来实验性地探测暴胀 PBH 场景，而无需考虑与 PBH 形成和演化相关的非线性。 ar X iv :2 10 4. 12 79 2v 2 [ astroph .C O ] 2 4 Sep 20 21
We propose a new method for probing inflationary models of primordial black hole (PBH) production, using only CMB physics at relatively large scales. In PBH scenarios, the primordial power spectrum profile for curvature perturbations is characterized by a pronounced dip, followed by a rapid growth towards small scales, leading to a peak responsible for PBH formation. We focus on scales around the dip that are well separated from the peak to analytically compute expressions for the curvature power spectrum and bispectrum. The size of the squeezed bispectrum is enhanced at the position of the dip, and it acquires a characteristic scale dependence that can be probed by cross-correlating CMB μ-distortions and temperature fluctuations. We quantitatively study the properties of such cross-correlations and how they depend on the underlying model, discussing how they can be tested by the next generation of CMB μ-distortion experiments. This method allows one to experimentally probe inflationary PBH scenarios using well-understood CMB physics, without considering non-linearities associated with PBH formation and evolution. ar X iv :2 10 4. 12 79 2v 2 [ as tr oph .C O ] 2 4 Se p 20 21