Imprint of inflationary gravitational waves and WIMP dark matter in pulsar timing array data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00585265" target="_blank" >RIV/68378271:_____/24:00585265 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1475-7516/2024/03/031" target="_blank" >https://doi.org/10.1088/1475-7516/2024/03/031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1475-7516/2024/03/031" target="_blank" >10.1088/1475-7516/2024/03/031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Imprint of inflationary gravitational waves and WIMP dark matter in pulsar timing array data

Popis výsledku v původním jazyce

Motivated by the recent release of new results from five different pulsar timing array (PTA) experiments claiming to have found compelling evidence for primordial gravitational waves (GW) at nanoHz frequencies, we consider the prospects of generating such a signal from inflationary bluetilted tensor power spectrum in a specific dark matter (DM) scenario dubbed as Miracleless WIMP. While Miracleless WIMP, due to insufficient interaction rate with the Standard Model (SM) bath gets thermally overproduced, inflationary bluetilted gravitational waves (BGW) in compliance with PTA data, conflict cosmological observations if reheat temperature after inflation is sufficiently high. Both these issues are circumvented with late entropy dilution, bringing DM abundance within observational limits and creating a doublypeaked feature in the BGW spectrum consistent with cosmological observations. The bluetilted tail of the lowfrequency peak can fit NANOGrav 15 yr data, while other parts of the spectrum are within reach of present and future GW experiments.

Název v anglickém jazyce

Imprint of inflationary gravitational waves and WIMP dark matter in pulsar timing array data

Popis výsledku anglicky

Motivated by the recent release of new results from five different pulsar timing array (PTA) experiments claiming to have found compelling evidence for primordial gravitational waves (GW) at nanoHz frequencies, we consider the prospects of generating such a signal from inflationary bluetilted tensor power spectrum in a specific dark matter (DM) scenario dubbed as Miracleless WIMP. While Miracleless WIMP, due to insufficient interaction rate with the Standard Model (SM) bath gets thermally overproduced, inflationary bluetilted gravitational waves (BGW) in compliance with PTA data, conflict cosmological observations if reheat temperature after inflation is sufficiently high. Both these issues are circumvented with late entropy dilution, bringing DM abundance within observational limits and creating a doublypeaked feature in the BGW spectrum consistent with cosmological observations. The bluetilted tail of the lowfrequency peak can fit NANOGrav 15 yr data, while other parts of the spectrum are within reach of present and future GW experiments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Cosmology and Astroparticle Physics

ISSN

1475-7516

e-ISSN

1475-7516

Svazek periodika

2024

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

031

Kód UT WoS článku

001195757300005

EID výsledku v databázi Scopus

2-s2.0-85188009064