Near-threshold photoproduction of in two-gluon exchange model Fancong Zeng, Xiao-Yun Wang, Li Zhang, Ya-Ping Xie, Rong Wang and Xurong Chen Eur. Phys. J. C, 80 11 (2020) 1027 Published online: 06 November 2020 DOI: 10.1140/epjc/s10052-020-08584-6