Supercooled phase transitions in conformal dark sectors explain NANOGrav data

2025/01/20 by João Gonçalves, Gonçalves, João, Danny Marfatia +5 · 8 citations
Engineering · Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Optical Polarization and Ellipsometry #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.2501.11619

openalex publication_date 2025/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Cited by

• DarkAgents
• Probing thermal leptogenesis and dark matter through primordial gravitational waves from a supercooled universe
• Beyond the Daisy Chain: Running and the 3D EFT View of Supercooled Phase Transitions
• Glimpsing Physics of Nano-Hz Gravitational Waves in Neutrinos from Core-Collapse Supernovae
• Gravitational waves from a dilaton-induced, first-order QCD phase transition
• 95 GeV Higgs boson and nano-Hertz gravitational waves from domain walls in the N2HDM
• Primordial black holes and magnetic fields in conformal neutrino mass models
• From oversimplified to overlooked: the case for exploring Rich Dark Sectors

Related

• Supercooled Dark Scalar Phase Transitions explanation of NANOGrav data
• NANOGrav Signal from a Dark Conformal Phase Transition
• Does NANOGrav observe a dark sector phase transition?
• Supercooled Phase Transitions: Why Thermal History of Hidden Sector Matters in Analysis of Pulsar Timing Array Signals
• Implications of NANOGrav results and UV freeze-in in a fast-expanding Universe