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Supersizing axions with small size instantons

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arxiv 2207.08740 v2 pith:JACAW7U5 submitted 2022-07-18 hep-ph

Supersizing axions with small size instantons

classification hep-ph
keywords axionscollidercoloreffectsexplicitextendedframeworkinstantons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We construct a new framework to calculate the enhancement of axion masses and concomitant effects on axion-meson mixing arising from small size instantons (SSIs), which originate in models featuring an extended color gauge symmetry. The framework is based on an explicit evaluation of 't Hooft determinantal operators that partition into instanton amplitudes, affording a more precise determination of the axion-diphoton coupling than previous results. Using an explicit model first presented in Ref. arXiv:1805.06465, we demonstrate that axions solving the strong CP problem can have electroweak scale masses and higher, driven by SSI effects. Such collider axions are prime targets for resonance searches at the Large Hadron Collider and afford a unique anchor for motivating extended color symmetries.

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Cited by 5 Pith papers

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