Summary of the search for four-quark states in γγ collisions
N.N. Achasov,
G.N. Shestakov S.L. Sobolev Institute for Mathematics, Siberian Branch of the Russian Academy of Sciences, prosp. akad. Koptyuga 4, Novosibirsk, 630090, Russian Federation
PACS:14.40.Cs, 14.40.Ev, 14.40.Aq, 12.39.Ba (all) DOI:10.1070/PU1991v034n06ABEH002384 URL: https://ufn.ru/en/articles/1991/6/b/ Citation: Achasov N N, Shestakov G N "Summary of the search for four-quark states in γγ collisions" Sov. Phys. Usp.34 (6) 471–496 (1991)