TL;DR
This paper provides a clear overview of axion physics, focusing on the theoretical derivation of axion mass and decay constants from the underlying field theory and instanton effects.
Contribution
It offers a detailed calculation of instanton-induced symmetry breaking and clarifies the relationship between axion mass and decay constant for readers with basic quantum field theory knowledge.
Findings
Explicit calculation of instanton effects on axion potential
Derivation of axion mass and decay constant relation
Clarification of field theory basis for axion properties
Abstract
I review the canonical axion potential, with an emphasis on the field theory underlying radial and angular modes of complex scalar fields. I present the explicit calculation of the instanton-induced breaking of the Goldstone field direction necessary to derive the canonical axion mass and decay constant relation. The primer is intended to serve an audience with elementary quantum field theory expertise.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Relativity and Gravitational Theory · Cosmology and Gravitation Theories