Seminar detail: Cold Darkogenesis: Dark Matter and Baryon Asymmetry in Light of the PTA Signal

Date&Time	Wed Nov 06 2024 (13:00 - 14:00)
Speaker	Kohei Fujikura
Affiliation	Tokyo University
Title	Cold Darkogenesis: Dark Matter and Baryon Asymmetry in Light of the PTA Signal
Abstract	In this talk, I discuss the possibility that the recently reported nano-Hz gravitational wave signal by Pulsar Timing Array (PTA) experiments is caused by a strong first-order phase transition in a nearly conformal dark sector. The resulting strong supercooling exponentially dilutes any pre-existing baryon asymmetry and dark matter. To address this issue, we develop a mechanism of cold darkogenesis, which generates a dark-sector asymmetry during the phase transition through the textured dark Higgs field. This asymmetry is then transferred to the visible sector via neutron portal interactions, leading to the observed baryon asymmetry.
Remarks
Slide/Video	video1 video2