385 citations · 3.7k across the 95 of their papers we have counts for
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hep-th2022★ 7 cited
Axion Quality Problem and Non-Minimal Gravitational Coupling in the Palatini Formulation
Dhong Yeon Cheong, Koichi Hamaguchi, Yoshiki Kanazawa +3
In axion models, the global U(1) Peccei-Quinn (PQ) symmetry is explicitly broken by non-perturbative effects of gravity, such as axionic wormholes. The gravitational violation of t…
hep-th2021★ 17 cited
Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity
Koichi Hamaguchi, Yoshiki Kanazawa, Natsumi Nagata
Global symmetries are expected to be violated by gravity, which may cause a serious problem to models based on these symmetries. A famous example is the Peccei-Quinn solution to th…