CMB μT cross correlations as a probe of primordial black hole scenarios

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554709" target="_blank" >RIV/68378271:_____/21:00554709 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.104.043526" target="_blank" >https://doi.org/10.1103/PhysRevD.104.043526</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.104.043526" target="_blank" >10.1103/PhysRevD.104.043526</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CMB μT cross correlations as a probe of primordial black hole scenarios

Popis výsledku v původním jazyce

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 toward 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 mu-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 mu-distortion experiments. This method allows one to experimentally probe inflationary PBH scenarios using well-understood CMB physics, without considering nonlinearities associated with PBH formation and evolution.

Název v anglickém jazyce

CMB μT cross correlations as a probe of primordial black hole scenarios

Popis výsledku anglicky

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 toward 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 mu-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 mu-distortion experiments. This method allows one to experimentally probe inflationary PBH scenarios using well-understood CMB physics, without considering nonlinearities associated with PBH formation and evolution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

104

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

043526

Kód UT WoS článku

000686913000002

EID výsledku v databázi Scopus

2-s2.0-85113769249