Analysis of the resonance in line with unitarity and analyticity constraints Christoph Hanhart, Stephan Kürten, Méril Reboud and Danny van Dyk Eur. Phys. J. C, 84 5 (2024) 483 Published online: 09 May 2024 DOI: 10.1140/epjc/s10052-024-12785-8