Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP10(2018)193
Keywords
Anomalies in Field and String Theories; Cosmology of Theories beyond the SM
Categories
Funding
- NSF [PHY-0855591, PHY-1216270]
- DOE [DE-SC-0010010, DE-SC0013607]
- NASA [NNX16AI12G]
- NASA [903810, NNX16AI12G] Funding Source: Federal RePORTER
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Many cosmological models rely on large couplings of axions to gauge fields. Examples include theories of magnetogenesis, inflation on a steep potential, chiral gravitational waves, and chromonatural inflation. Such theories require a mismatch between the axion field range and the mass scale appearing in the for an axion of fundamental period F-a will obey the constraint < F-a. For a some applications, including chromonatural inflation with sub-Planckian field range, this constraint obstructs a clockwork UV completion. Alternative routes to a large coupling include fields of large charge (an approach limited by strong coupling) or kinetic mixing (requiring a lighter axion). Our results suggest that completions of axion cosmologies that explain the large parameter in the theory potentially alter the phenomenological predictions of the model.
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