Searching for the vector-like X-quark at the future electron–proton collidersYan-Ju Zhang, Yong-Tao Zhu, Lin Han, Yan-Ping Bi and Tai-Gang LiuEur. Phys. J. C, 84 11 (2024) 1184DOI: https://doi.org/10.1140/epjc/s10052-024-13475-1