22-29 July 2015
Europe/Vienna timezone

Dulition of axion dark radiation

Jul 23, 2015, 2:45 PM
15m
HS33

HS33

talk Astroparticle Physics, Cosmology, Gravitation Astroparticle Physics, Cosmology, Gravitation

Speaker

Osamu Seto (Hokkai-Gakuen University)

Description

Coherently generated PQ scalar fields could dominate the energy density in the early Universe and decay into relativistic axions, which would confront with the current dark radiation constraints. We study the condition that a thermal inflation driven by a U(1) gauged Higgs field dilutes such axions, in particular, for the case of gauged B-L symetry.

Primary author

Osamu Seto (Hokkai-Gakuen University)

Co-authors

Hironori Hattori (Hokkaido University) Naoya Omoto (Hokkaido University) Tatsuo Kobayashi (Hokkaido University)

Presentation materials