NANOGrav results and dark first order phase transitions

2020/09/23 by Andrea Addazi, Yi-Fu Cai, Qingyu Gan +2 · 1 citation
Physics and Astronomy · #Background radiation #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #First order #Gravitational wave #Gravitational wave background #Particle physics theoretical and experimental studies #Phase (matter) #Phase transition #gr-qc #hep-ph

paper · pdf · doi:10.1007/s11433-021-1724-6

published as Sci.China Phys.Mech.Astron. 64, 290411 (2021) · More details and results on possible WDM-inspired GW spectra added, including more recent numerical tools in the subject. New references added. The main conclusions are substantially unchanged

arxiv created 2020/09/23 · openalex created_date 2020/10/01 · openalex publication_date 2021/06/29 · arxiv updated 2021/09/21 · openalex updated_date 2026/08/05

Abstract

The recent NANOGrav evidence of a common-source stochastic background provides a hint to Gravitational Waves (GW) radiation from the Early Universe. We show that this result can be interpreted as a GW spectrum produced from First Order Phase Transitions (FOPTs) around a temperature in the KeV-MeV window. Such a class of FOPTs at temperatures much below the electroweak scale can be naturally envisaged in several Warm Dark Matter models such as Majoron Dark Matter.

Citations

• Dimension-Six Terms in the Standard Model Lagrangian
• Probing the origin of our universe through primordial gravitational waves by Ali CMB project
• Shape of the acoustic gravitational wave power spectrum from a first order phase transition
• Gravitational radiation from a bulk flow model
• Two-step strongly first-order electroweak phase transition modified FIMP dark matter, gravitational wave signals, and the neutrino mass
• Vorticity, Kinetic Energy, and Suppressed Gravitational-Wave Production in Strong First-Order Phase Transitions
• Detecting gravitational waves from cosmological phase transitions with LISA: an update
• Gravitational waves from vacuum first-order phase transitions. II. From thin to thick walls
• Primordial black holes and gravitational waves from resonant amplification during inflation

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• A first order dark SU(2) D phase transition with vector dark matter in the light of NANOGrav 12.5 yr data