Speaker
Mr
Zeng Zhenmin
(ITP-CAS)
Description
We investigate the first-order phase transition catalyzed by primordial black holes~(PBHs) in the early Universe. We find that super-horizon curvature perturbations generated in this scenario lead to the production of gravitational waves when the scalar modes re-enter the horizon. If PBHs with masses about $10^{-13}M_{\odot}$ constitute all dark matter, the first-order electroweak phase transition catalyzed by PBHs can explain the gravitational wave signal observed by pulsar timing array collaborations without the overproduction of PBHs.
Primary authors
Mr
Zeng Zhenmin
(ITP-CAS)
Prof.
Guo Zongkuan
(ITP-CAS)
