Speaker
Kai Murai
(University of Tokyo)
Description
The interaction between axion and gauge fields has been discussed in the contexts of inflationary models and primordial gravitational production. In this talk, we consider an inflationary model where SU(N) gauge fields couple to the inflaton through the Chern-Simons term. I will shortly review the dynamics of SU(2) gauge fields during inflation and then provide a general procedure to construct homogeneous and isotropic solutions of SU(N) gauge fields. I will also show the results for the linear perturbations in our model and discuss open questions. It is straightforward to apply our procedure to the other simple Lie groups.
Author
Kai Murai
(University of Tokyo)
Co-authors
Tomohiro Fujita
(Waseda University)
Hiromasa Nakatsuka
(University of tokyo)
Kyohei Mukaida
(DESY)
Dr
Ryo Namba
