Speaker
Andrew Cheek
(Tsung-Dao Lee Institute)
Description
In this talk I will discuss the non-standard cosmology that can arise when one considers the UV physics that leads to light axions. I will focus on the case of `preferred axion models’, these are models that are consistent with post-inflationary symmetry breaking and current cosmological observations. Previously, the number of simple models that do not have a domain wall problem was thought to be only two. My recent work showed that more models should be considered, and indeed there are six more that don’t have a domain wall problem. I will discuss some phenomenological consequences.
Author
Andrew Cheek
(Tsung-Dao Lee Institute)