Three body unitary coupled channel analysis on η(1405/1475) Jia-Jun Wu, Satoshi X. Nakamura, Qi Huang, Hai-Ping Peng, Yan Zhang and Ying-Chun Zhu EPJ Web Conf., 303 (2024) 01026 Published online: 25 September 2024 DOI: 10.1051/epjconf/202430301026