Supercooled phase transitions in conformal dark sectors explain NANOGrav data
arXiv:2501.11619 · doi:10.1016/j.physletb.2025.139829
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.
6 pages, 5 figures, 1 table. Version to appear in PLB