Summary of the K−pp bound-state observation in E15 and future prospects Fuminori Sakuma, Shuhei Ajimura, Takaya Akaishi, Hidemitsu Asano, Massimiliano Bazzi, George Beer, Hyoungchan Bhang, Mario Bragadireanu, Paul Buehler, Luigi Busso et al. (65 more) EPJ Web Conf., 262 (2022) 01008 Published online: 27 April 2022 DOI: 10.1051/epjconf/202226201008