QCD topology and axion properties in an isotropic hot and dense medium Hong-Fang Gong, Qi Lu, Zhen-Yan Lu, Lu-Meng Liu, Xun Chen and Shu-Peng Wang Eur. Phys. J. C, 84 11 (2024) 1222 Published online: 25 November 2024 DOI: 10.1140/epjc/s10052-024-13595-8