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- W4309297218 abstract "The origins of matter and radiation in the universe lie in a hot big bang. We present a number of well-motivated cosmologies in which the big bang occurs through a strong first-order phase transition---either at the end of inflation, after a period of kination (``kination-induced big bang''), or after a second period of vacuum domination in the early Universe (``supercooled big bang''); we also propose a ``dark big bang'' where only the dark matter in the Universe is created in a first-order phase transition much after inflation. In all of these scenarios, the resulting gravitational radiation can explain the tentative signals reported by the NANOGrav, Parkes, and European Pulsar Timing Array experiments if the reheating temperature of the hot big bang, and correspondingly the energy scale of the false vacuum, falls in the range ${T}_{*}ensuremath{sim}{ensuremath{rho}}_{mathrm{vac}}^{1/4}=mathrm{MeV}--100text{ }mathrm{GeV}$. All of the same models at higher reheating temperatures will be of interest to upcoming ground- and space-based interferometer searches for gravitational waves at larger frequency." @default.
- W4309297218 created "2022-11-25" @default.
- W4309297218 creator A5039320034 @default.
- W4309297218 creator A5057278725 @default.
- W4309297218 date "2022-11-18" @default.
- W4309297218 modified "2023-10-14" @default.
- W4309297218 title "Have pulsar timing arrays detected the hot big bang: Gravitational waves from strong first order phase transitions in the early Universe" @default.
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