Production of excited doubly heavy baryons at the super-Z factory Juan-Juan Niu, Jing-Bo Li, Huan-Yu Bi and Hong-Hao Ma Eur. Phys. J. C, 83 9 (2023) 822 Published online: 14 September 2023 DOI: 10.1140/epjc/s10052-023-11958-1