Focus Workshop on Cosmological Phase Transitions: Theory, Dark Matter Genesis, and Gravitational Wave Signatures

Session

Session 5

21 Nov 2025, 14:00

IBS, Daejeon

7. MeV First-Order Dark Phase Transitions

Shaoping Li

21/11/2025, 14:00

MeV-scale first-order phase transitions (FOPT) can generate stochastic gravitational waves (GW) in
the nanohertz frequency, which can now be probed by Pulsar Timing Array experiments and will be targeted by
Square Kilometer Array. Nanohertz GW can also give rise to spectral distortions in the cosmic microwave
background and modification of the effective number of neutrino species,...

8. Discussion

21/11/2025, 15:00