New narrow LHCb pentaquarks as lowest antiquark-diquark-diquark systems A. N. Semenova, V. V. Anisovich and A. V. Sarantsev Eur. Phys. J. A, 56 5 (2020) 142 Published online: 19 May 2020 DOI: 10.1140/epja/s10050-020-00151-7