Cheshire θ terms, Aharonov-Bohm effects, and axions

Shi Chen; Aleksey Cherman; Gongjun Choi; Maria K Neuzil

doi:10.1103/jnxt-m1dk

Cheshire θ terms, Aharonov-Bohm effects, and axions

Physics and Astronomy (Twin Cities)

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Abstract

We discuss unusual θ terms that can appear in field theories that allow global vortices. These “Cheshire θ terms” induce Aharonov-Bohm effects for some particles that move around vortices. For example, a Cheshire θ term can appear in QCD coupled to an axion and induces Aharonov-Bohm effects for baryons and leptons moving around axion strings.

Original language	English (US)
Article number	045012
Journal	Physical Review D
Volume	112
Issue number	4
DOIs	https://doi.org/10.1103/jnxt-m1dk
State	Published - Aug 26 2025

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© Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.

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abstract = "We discuss unusual θ terms that can appear in field theories that allow global vortices. These “Cheshire θ terms” induce Aharonov-Bohm effects for some particles that move around vortices. For example, a Cheshire θ term can appear in QCD coupled to an axion and induces Aharonov-Bohm effects for baryons and leptons moving around axion strings.",

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AU - Neuzil, Maria K

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AB - We discuss unusual θ terms that can appear in field theories that allow global vortices. These “Cheshire θ terms” induce Aharonov-Bohm effects for some particles that move around vortices. For example, a Cheshire θ term can appear in QCD coupled to an axion and induces Aharonov-Bohm effects for baryons and leptons moving around axion strings.

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Cheshire θ terms, Aharonov-Bohm effects, and axions

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