Conveners
Session 7
- Yi Yang ()
We discuss the intriguing possibility that the recently reported nano-Hz gravitational wave signal by Pulsar Timing Array (PTA) experiments is sourced by a strong first-order phase transition in a dark sector. The phase transition has to be strongly supercooled to explain the signal amplitude. However, such strong supercooling exponentially dilutes away any pre-existing baryon asymmetry and...
A complex singlet extension of the Standard Model not only incorporates scalar dark matter candidates but also enables the realization of a strong electroweak first-order phase transition essential for electroweak baryogenesis. This phase transition may generate gravitational waves and primordial black holes. We discuss the correlation between the strength of the phase transition and these...
