Seeley–DeWitt expansion of scattering phase shift Yuan-Yuan Liu, Yu-Jie Chen, Shi-Lin Li, Wen-Du Li and Wu-Sheng Dai Eur. Phys. J. Plus, 137 10 (2022) 1140 Published online: 17 October 2022 DOI: 10.1140/epjp/s13360-022-03380-5