Parity violating non-Gaussianity from axion-gauge field dynamics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554707" target="_blank" >RIV/68378271:_____/21:00554707 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.104.123523" target="_blank" >https://doi.org/10.1103/PhysRevD.104.123523</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.104.123523" target="_blank" >10.1103/PhysRevD.104.123523</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Parity violating non-Gaussianity from axion-gauge field dynamics

Popis výsledku v původním jazyce

We study scalar-tensor-tensor and tensor-scalar-scalar three-point cross-correlations generated by the dynamics of a transiently rolling spectator axion-U(1) gauge field model during inflation. In this framework, tensor and scalar fluctuations are sourced by gauge fields at the nonlinear level due to gravitational interactions, providing a chiral background of gravitational waves while keeping the level of scalar fluctuations at the observationally viable levels at cosmic microwave background (CMB) scales. We show that the gravitational couplings between the observable sector and gauge fields can also mediate strong correlations between scalar and tensor fluctuations, generating an amplitude for the mixed-type three-point functions that is parametrically larger-f(NL) similar or equal to O(110)(r/0.00)(3/2)-compared to the single-field realizations of inflation.

Název v anglickém jazyce

Parity violating non-Gaussianity from axion-gauge field dynamics

Popis výsledku anglicky

We study scalar-tensor-tensor and tensor-scalar-scalar three-point cross-correlations generated by the dynamics of a transiently rolling spectator axion-U(1) gauge field model during inflation. In this framework, tensor and scalar fluctuations are sourced by gauge fields at the nonlinear level due to gravitational interactions, providing a chiral background of gravitational waves while keeping the level of scalar fluctuations at the observationally viable levels at cosmic microwave background (CMB) scales. We show that the gravitational couplings between the observable sector and gauge fields can also mediate strong correlations between scalar and tensor fluctuations, generating an amplitude for the mixed-type three-point functions that is parametrically larger-f(NL) similar or equal to O(110)(r/0.00)(3/2)-compared to the single-field realizations of inflation.

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

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

22

Strana od-do

123523

Kód UT WoS článku

000734362700010

EID výsledku v databázi Scopus

2-s2.0-85122347507