Ahn, J K Search for K_→π^νν[over ¯] and K_→π^X^ Decays at the J-PARC KOTO Experiment. [electronic resource] - Physical review letters Jan 2019 - 021802 p. digital Publication Type: Journal Article ISSN: 1079-7114 Standard No.: 10.1103/PhysRevLett.122.021802 doi