Cosmological Roles of Dark Photons in Axion-induced Electroweak Baryogenesis

Kwang Sik Jeong, Ju Hyeong Kang, Shota Nakagawa

By coupling to both the Higgs and electroweak gauge sectors, an axion can generate the matter-antimatter asymmetry in the universe via electroweak baryogenesis when the axion decay…