Speaker
Shota Nakagawa
(Tsung-Dao Lee Institute, Shanghai Jiao Tong University)
Description
First-order phase transitions in the early Universe are ubiquitous from the viewpoint of particle physics. Particle production during the nucleation and collision of bubbles has beed widely discussed. In this talk, we focus on fermion production induced by relativistic bubble collisions. The post-collision scalar-field dynamics in the planar approximation are described well in terms of Milne coordinates, rather than Minkowski, due to the SO(1,1) symmetry. We exploit this feature to develop a Bogoliubov formalism for fermions in Milne spacetime and study the spectrum and abundance of the produced fermion particles.
Primary authors
Ryusuke Jinno
(Kobe University)
Shota Nakagawa
(Tsung-Dao Lee Institute, Shanghai Jiao Tong University)
Yaoduo Wang
(TDLI)
Yuichiro Nakai
