A dark QCD model with a first-order phase transition at 5-6 MeV produces the NANOGrav SGWB amplitude while supplying self-interacting dark matter via a 40 GeV baryon and 20-50 MeV dilaton, linked by entropy dilution.
(E4) We can rewrite this in terms of the transition strength parameter α = ρvac/ρrad(T∗), where ρrad ∼ π2 30 g∗T 4 ∗ : γeq ≈ ρvac g2 DT 4∗ = αρrad g2 DT 4∗ ≈ α g2 D π2g∗ 30
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Dark QCD Origin of the NANOGrav Signal and Self-Interacting Dark Matter
A dark QCD model with a first-order phase transition at 5-6 MeV produces the NANOGrav SGWB amplitude while supplying self-interacting dark matter via a 40 GeV baryon and 20-50 MeV dilaton, linked by entropy dilution.