Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen. - Abe S; Asami S; Eizuka M; Futagi S; Gando A; Gando Y; Gima T; Goto A; Hachiya T; Hata K; Hayashida S; Hosokawa K; et al. (Physical review letters, 2023)