Wave-packet effects: a solution for isospin anomalies in vector-meson decay Kenzo Ishikawa, Osamu Jinnouchi, Kenji Nishiwaki and Kin-ya Oda Eur. Phys. J. C, 83 10 (2023) 978 Published online: 30 October 2023 DOI: 10.1140/epjc/s10052-023-12077-7