Non-strange dibaryons studied in coherent double neutral-meson photoproduction on the deuteron - Ishikawa Takatsugu; Fujimura Hisako; Fukasawa Hiroshi; Hashimoto Ryo; He Qinghua; Honda Yuki; Iwata Takahiro; Kaida Shun; Kanda Hiroki; Kasagi Jirohta; Kawano Atsushi; Kuwasaki Shuzo; et al. (EPJ Web of Conferences, 2020)