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hep-ph2026
Anomaly-free axion-like particle in Nelson-Barr models
Mohammad Aghaie, Ryoma Masuda, Ryosuke Sato
We study Nelson--Barr models with a discrete symmetry that solve the strong CP problem through spontaneous CP violation, and show that they naturally predict a light axion-li…
hep-ph2026
Self-Interaction Bounds on Ultralight Dark Matter Couplings to Matter
Mohammad Aghaie, Shao-Ping Li
Ultralight dark matter (ULDM) couplings to matter fields and ULDM self-interactions are typically treated as independent probes. However, since the ULDM-matter couplings unavoidabl…
hep-ph2026
A particle on a ring or: how I learned to stop worrying and love -vacua
Mohammad Aghaie, Ryosuke Sato
Recently, Ai, Cruz, Garbrecht, and Tamarit (arXiv:2001.07152, arXiv:2404.16026, arXiv:2511.04216) claimed that the strong CP problem can be avoided by adopting a particular order o…