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• W2810660210 abstract "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 $a F widetilde{F}$ coupling. This mismatch suggests an underlying monodromy, with the axion winding around its fundamental period a large number of times. We investigate the extent to which this integer can be explained as a product of smaller integers in a UV completion: in the parlance of our times, can the theory be clockworked? We argue that a clockwork construction producing a potential $mu^4 cos(frac{a}{j F_a})$ for an axion of fundamental period $F_a$ will obey the constraint $mu < F_a$. For 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." @default.
• W2810660210 created "2018-07-10" @default.
• W2810660210 creator A5034288408 @default.
• W2810660210 creator A5036692786 @default.
• W2810660210 creator A5062888979 @default.
• W2810660210 date "2018-10-01" @default.
• W2810660210 modified "2023-10-14" @default.
• W2810660210 title "Clockwork axions in cosmology. Is chromonatural inflation chrononatural?" @default.
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• W2810660210 doi "https://doi.org/10.1007/jhep10(2018)193" @default.

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