Research Seminars @ Illinois

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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.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

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

Event Type: Seminar/Symposium
Sponsor: Physics Department
Location: Rhondale Tso Seminar Room, Loomis 236
Date: Sep 5, 2025 11:00 am
Speaker: Gongjun Choi (University of Minnesota)
Contact: Brandy Koebbe
E-Mail: bkoebbe@illinois.edu
Views: 83
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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