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DESY Theory Seminar

Theory: Cheshire θ terms, Aharonov-Bohm effects, and axions

Name: Theory: Cheshire θ terms, Aharonov-Bohm effects, and axions
Start: 2025-05-19T15:00:00+02:00
End: 2025-05-19T16:00:00+02:00
Location: No location set

by Gongjun Choi

Monday 19 May 2025, 15:00 → 16:00 Europe/Berlin

SR2

Description

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.