Axion landscape cosmology

We study the cosmology of complex multi-axion theories. With (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...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2019-09, Vol.2019 (9), p.62-62
Main Authors: Bachlechner, Thomas C., Eckerle, Kate, Janssen, Oliver, Kleban, Matthew
Format: Article
Language:English
Subjects:
Astronomy & Astrophysics
ASTRONOMY AND ASTROPHYSICS
Cosmology
Dark matter
Instantons
Physics
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Summary:We study the cosmology of complex multi-axion theories. With (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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2019/09/062