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19.05.2025 / 15:00 - 16:00 / Hamburg, SR2, building 2a
Theory SeminarCheshire θ terms, Aharonov-Bohm effects, and axions
Gongjun Choi
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. We point out a potential experimental signature left on the spectrum of gravitational waves from axion cosmic string network by the Cheshire θ term.
More Information: https://indico.desy.de/event/49070/
