Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

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High Energy Physics Seminar - Gongjun Choi (University of Minnesota) "Cheshire θ terms, Aharonov-Bohm effects, and axions"

Sep 5, 2025 11:00 am

Rhondale Tso Seminar Room, Loomis 236

Seminar/Symposium

Sponsor: Physics Department
Speaker: Gongjun Choi (University of Minnesota)
Contact: Brandy Koebbe
E-Mail: bkoebbe@illinois.edu
Views: 89
Originating Calendar: Physics - High Energy Physics Seminar; 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.

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