Journal Article

PUBDB-2024-00150

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Constraining postinflationary axions with pulsar timing arrays

Servant, G. (Corresponding author)DESY* ; Simakachorn, P. (Corresponding author)

2023
American Physical Society Ridge, NY

This record in other databases:  

Please use a persistent id in citations: doi:10.1103/PhysRevD.108.123516  doi:10.3204/PUBDB-2024-00150

Report No.: DESY-23-094; arXiv:2307.03121

Abstract: Models that produce Axion-Like-Particles (ALP) after cosmological inflation due to spontaneous $U(1)$ symmetry breaking also produce cosmic string networks. Those axionic strings lose energy through gravitational wave emission during the whole cosmological history, generating a stochastic background of gravitational waves that spans many decades in frequency. We can therefore constrain the axion decay constant and axion mass from limits on the gravitational wave spectrum and compatibility with dark matter abundance as well as dark radiation. We derive such limits from analyzing the most recent NANOGrav data from Pulsar Timing Arrays (PTA). The limits are compatible with the slightly stronger $N_{\rm eff}$ bounds on dark radiation for ALP masses $m_a \lesssim 10^{-10}$ eV. On the other hand, for heavy ALPs with $m_a\gtrsim 0.1$ GeV and $N_{\rm DW}\neq 1$, new regions of parameter space can be probed by PTA data due to the dominant Domain-Wall contribution to the gravitational wave background.

Keyword(s): gravitational radiation: background ; cosmic string: network ; axion: decay constant ; axion: string ; gravitational radiation: spectrum ; axion: mass ; background: stochastic ; gravitational radiation: emission ; dark matter: parametrization ; pulsar ; symmetry: U(1) ; domain wall ; NANOGrav ; inflation: model ; symmetry breaking ; axion-like particles ; history

Note: Phys.Rev.D 108 (2023) 12, 123516. 9 pages, 4 figures + supplemental material (4 pages, 3 figures); Version published in PRD. Clarifications on the axion matter domination added

---

Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project 390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2023

---

Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Servant, G.DESY* ; Simakachorn, P. (Corresponding author)Extern*
Constraining Post-Inflationary Axions with Pulsar Timing Arrays
[10.3204/PUBDB-2023-03968]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---