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hep-ph2025
An Extra-Dimensional Axion in a 5D Warped Orbifold GUT
Gongjun Choi, Tony Gherghetta
We study the QCD axion arising from the 5th component of a bulk gauge field in a five-dimensional warped grand unified theory, and determine the viable range of the axion de…
hep-th2025
Non-invertible Chiral Symmetry and Axions under Electromagnetic Duality
Gongjun Choi, Tony Gherghetta, John Terning
We study the implications of non-invertible chiral symmetry in a four-dimensional U(1) gauge theory coupled to massless fermions with electromagnetic duality. Th…