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Supercooled phase transitions in conformal dark sectors explain NANOGrav data

Gonçalves, João LU ; Marfatia, Danny ; Morais, António P. LU and Pasechnik, Roman LU (2025) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 869.
Abstract

According to recent lore, it is difficult to explain the evidence for a stochastic gravitational wave background obtained by pulsar timing arrays with supercooled first-order phase transitions (FOPTs). We demonstrate that supercooled FOPTs in dark U(1)′ models with a conformal dark sector easily explain the nHz signal at NANOGrav.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Conformal models, Dark sectors, NANOGrav, Supoercooled phase transitions
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
869
article number
139829
publisher
Elsevier
external identifiers
  • scopus:105013851874
ISSN
0370-2693
DOI
10.1016/j.physletb.2025.139829
language
English
LU publication?
yes
id
6b54b15b-a1b1-4b14-9607-1eb925d80006
date added to LUP
2025-10-13 10:11:41
date last changed
2025-10-14 11:14:37
@article{6b54b15b-a1b1-4b14-9607-1eb925d80006,
  abstract     = {{<p>According to recent lore, it is difficult to explain the evidence for a stochastic gravitational wave background obtained by pulsar timing arrays with supercooled first-order phase transitions (FOPTs). We demonstrate that supercooled FOPTs in dark U(1)<sup>′</sup> models with a conformal dark sector easily explain the nHz signal at NANOGrav.</p>}},
  author       = {{Gonçalves, João and Marfatia, Danny and Morais, António P. and Pasechnik, Roman}},
  issn         = {{0370-2693}},
  keywords     = {{Conformal models; Dark sectors; NANOGrav; Supoercooled phase transitions}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Supercooled phase transitions in conformal dark sectors explain NANOGrav data}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2025.139829}},
  doi          = {{10.1016/j.physletb.2025.139829}},
  volume       = {{869}},
  year         = {{2025}},
}