G.V. Pakhlova a
P.N. Pakhlov a
S.I. Eidel’man b
a Russian Federation State Scientific Center ‘A.I. Alikhanov Institute of Theoretical and Experimental Physics’, ul. Bolshaya Cheremushkinskaya 25, Moscow, 117259, Russian Federation
b Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, prosp. akad. Lavrenteva 11, Novosibirsk, 630090, Russian Federation
The most significant results on the spectroscopy, production and decay of charmonium and charmonium-like states are reviewed. The surprise-filled physics of charmonium is currently attracting a lot of experimental and theoretical attention. Unexpected properties exhibited by numerous discovered states fail to be explained by current theory which claims instead the existence in the spectra of charmonium-like particles of exotic systems different from usual bound states.