Distribution functions of a radially excited pion Z.-N. Xu, Z.-Q. Yao, D. Binosi, M. Ding, C. D. Roberts and J. Rodríguez-Quintero Eur. Phys. J. C, 85 3 (2025) 330 Published online: 22 March 2025 DOI: 10.1140/epjc/s10052-025-14053-9