# CMB $\mu T$ cross-correlations as a probe of PBH scenarios

@inproceedings{Ozsoy2021CMBT,
title={CMB \$\mu T\$ cross-correlations as a probe of PBH scenarios},
author={Ogan Ozsoy and Gianmassimo Tasinato},
year={2021}
}
• Published 26 April 2021
• Physics
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… Expand
2 Citations

#### Figures from this paper

Consistency conditions and primordial black holes in single field inflation
• Physics
• 2021
We discuss new consistency relations for single field models of inflation capable of generating primordial black holes (PBH), and their observational implications for CMB μ-space distortions. TheseExpand
Primordial tensor bispectra in $\mu$-CMB cross-correlations
Cross-correlations between Cosmic Microwave Background (CMB) temperature and polarization anisotropies and μ-spectral distortions have been considered to measure (squeezed) primordial scalarExpand

#### References

SHOWING 1-10 OF 83 REFERENCES
Primordial black holes from single field models of inflation
• Physics
• 2017
Abstract Primordial black holes (PBH) have been shown to arise from high peaks in the matter power spectra of multi-field models of inflation. Here we show, with a simple toy model, that it is alsoExpand
Mechanisms for primordial black hole production in string theory
• Physics
• Journal of Cosmology and Astroparticle Physics
• 2018
We consider mechanisms for producing a significant population of primordial black holes (PBHs) within string inspired single field models of inflation. The production of PBHs requires a largeExpand
Shedding light on the small-scale crisis with CMB spectral distortions
• Physics
• 2017
The small-scale crisis, discrepancies between observations and N-body simulations, may imply suppressed matter fluctuations on subgalactic distance scales. Such a suppression could be caused by someExpand
Testing the running of non-Gaussianity through the CMB μ-distortion and the halo bias
• Physics
• 2013
The primordial non-Gaussianity parameters fNL and τNL may be scale dependent. We investigate the capability of future measurements of the CMB μ distortion, which is very sensitive to small scales,Expand
New window on primordial non-gaussianity.
• Physics, Medicine
• Physical review letters
• 2012
It is pointed out that correlations between μ distortion and temperature anisotropies can be used to test gaussianity at these very small scales and a Fisher matrix forecast of the observational constraints on f(NL)(loc) is presented. Expand
Primordial black hole production in Critical Higgs Inflation
• Physics
• 2018
Abstract Primordial Black Holes (PBH) arise naturally from high peaks in the curvature power spectrum of near-inflection-point single-field inflation, and could constitute today the dominantExpand
Scale-dependent non-Gaussianity probes inflationary physics
• Physics
• 2010
We calculate the scale dependence of the bispectrum and trispectrum in (quasi) local models of non-Gaussian primordial density perturbations, and characterize this scale dependence in terms of newExpand
Primordial Black Holes from Polynomial Potentials in Single Field Inflation
• Physics
• 2018
Within canonical single field inflation models, we provide a method to reverse engineer and reconstruct the inflaton potential from a given power spectrum. This is not only a useful tool to find aExpand
Steepest growth of the power spectrum and primordial black holes
• Physics
• Journal of Cosmology and Astroparticle Physics
• 2019
We derive analytic bounds on the shape of the primordial power spectrum in the context of single-field inflation. In particular, the steepest possible growth has a spectral index of ns − 1 = 4 onceExpand
Gravitational waves at interferometer scales and primordial black holes in axion inflation
• Physics
• 2016
We study the prospects of detection at terrestrial and space interferometers, as well as at pulsar timing array experiments, of a stochastic gravitational wave background which can be produced inExpand