Axion Landscape Cosmology
High Energy Physics - Theory
2019-10-09 v1
Abstract
We study the cosmology of complex multi-axion theories. With O(100) fields and GUT scale energies these theories contain a vast number of vacua, inflationary trajectories and a natural dark matter candidate. We demonstrate that the vacua are stable on cosmological timescales. In a single theory, both large- and small-field inflation are possible and yield a broad range of cosmological observables, and vacuum decay can be followed by a relatively large number (> 60) of efolds of inflation. Light axions stabilized by gravitational instantons may constitute a natural dark matter candidate that does not spoil an axion solution to the strong CP problem.
Keywords
Cite
@article{arxiv.1810.02822,
title = {Axion Landscape Cosmology},
author = {Thomas C. Bachlechner and Kate Eckerle and Oliver Janssen and Matthew Kleban},
journal= {arXiv preprint arXiv:1810.02822},
year = {2019}
}
Comments
46 pages, 7 figures