Prompt production of the hidden charm pentaquarks in the LHC Pan Ling, Xiao-Hu Dai, Meng-Lin Du and Qian Wang Eur. Phys. J. C, 81 9 (2021) 819 Published online: 16 September 2021 DOI: 10.1140/epjc/s10052-021-09613-8