Speaker
Osamu Seto
Description
The dynamics of hidden gauge fields coupled with an axion field during inflation is an interesting source of primordial gravitational wave perturbations. For a large axion decay constant, the subdominant energy density of the axion field would be transformed to that of the extra radiation of the hidden gauge bosons by the axion decay. Part of parameter space of such a model will be tested by future measurements.
Author
Osamu Seto
Co-authors
Masahito OGATA
(U. of Toyama)
Mitsuru Kakizaki
(University of Toyama)
