Regge-like relation and a universal description of heavy–light systems Kan Chen, Yubing Dong, Xiang Liu, Qi-Fang Lü and Takayuki Matsuki Eur. Phys. J. C, 78 1 (2018) 20 Published online: 12 January 2018 DOI: 10.1140/epjc/s10052-017-5512-3