# ${\boldsymbol {\boldsymbol c}}$ ${\boldsymbol {\overline{\boldsymbol c}}}$ MESONS (including possibly non- ${\boldsymbol {\boldsymbol q}}$ ${\boldsymbol {\overline{\boldsymbol q}}}$ states)

 See related reviews: Charmonium System Spectroscopy of Mesons Containing Two Heavy Quarks Branching Ratios of ${{\mathit \psi}{(2S)}}$ and ${{\mathit \chi}_{{c0}}}_{,1,2}$
 • ${{\mathit \eta}_{{c}}{(1S)}}$ $0^+(0^{- +})$
 • ${{\mathit J / \psi}{(1S)}}$ $0^-(1^{- -})$
 • ${{\mathit \chi}_{{c0}}{(1P)}}$ $0^+(0^{+ +})$
 • ${{\mathit \chi}_{{c1}}{(1P)}}$ $0^+(1^{+ +})$
 • ${{\mathit h}_{{c}}{(1P)}}$ $0^-(1^{+ -})$
 • ${{\mathit \chi}_{{c2}}{(1P)}}$ $0^+(2^{+ +})$
 • ${{\mathit \eta}_{{c}}{(2S)}}$ $0^+(0^{- +})$
 • ${{\mathit \psi}{(2S)}}$ $0^-(1^{- -})$
 • ${{\mathit \psi}{(3770)}}$ $0^-(1^{- -})$
 • ${{\mathit \psi}_{{2}}{(3823)}}$ was ${{\mathit \psi}{(3823)}}$, ${{\mathit X}{(3823)}}$ $0^-(2^{- -})$
 • ${{\mathit \psi}_{{3}}{(3842)}}$ $0^-(3^{- -})$
 ${{\mathit \chi}_{{c0}}{(3860)}}$ $0^+(0^{+ +})$
 • ${{\mathit \chi}_{{c1}}{(3872)}}$ aka ${{\mathit X}{(3872)}}$ $0^+(1^{+ +})$
 • ${{\mathit Z}_{{c}}{(3900)}}$ was ${{\mathit X}{(3900)}}$ $1^+(1^{+ -})$
 • ${{\mathit X}{(3915)}}$ was ${{\mathit \chi}_{{c0}}{(3915)}}$ $0^+(0$ or $2^{+ +})$
 • ${{\mathit \chi}_{{c2}}{(3930)}}$ $0^+(2^{+ +})$
 ${{\mathit X}{(3940)}}$ $?^?(?^{? ?})$
 • ${{\mathit X}{(4020)}^{\pm}}$ $1^+(?^{? -})$
 • ${{\mathit \psi}{(4040)}}$ $0^-(1^{- -})$
 ${{\mathit X}{(4050)}^{\pm}}$ $1^-(?^{? +})$
 ${{\mathit X}{(4055)}^{\pm}}$ $1^+(?^{? -})$
 ${{\mathit X}{(4100)}^{\pm}}$ $1^-(?^{? ?})$
 • ${{\mathit \chi}_{{c1}}{(4140)}}$ was ${{\mathit X}{(4140)}}$ $0^+(1^{+ +})$
 • ${{\mathit \psi}{(4160)}}$ $0^-(1^{- -})$
 ${{\mathit X}{(4160)}}$ $?^?(?^{? ?})$
 ${{\mathit Z}_{{c}}{(4200)}}$ was ${{\mathit X}{(4200)}^{\pm}}$ $1^+(1^{+ -})$
 • ${{\mathit \psi}{(4230)}}$ aka ${{\mathit Y}{(4230)}}$; was ${{\mathit X}{(4230)}}$ $0^-(1^{- -})$
 ${{\mathit R}_{{c0}}{(4240)}}$ was ${{\mathit X}{(4240)}^{\pm}}$ $1^+(0^{- -})$
 ${{\mathit X}{(4250)}^{\pm}}$ $1^-(?^{? +})$
 ${{\mathit \psi}{(4260)}}$ aka ${{\mathit Y}{(4260)}}$; was ${{\mathit X}{(4260)}}$ $0^-(1^{- -})$
 • ${{\mathit \chi}_{{c1}}{(4274)}}$ was ${{\mathit X}{(4274)}}$ $0^+(1^{+ +})$
 ${{\mathit X}{(4350)}}$ $0^+(?^{? +})$
 • ${{\mathit \psi}{(4360)}}$ aka ${{\mathit Y}{(4360)}}$; was ${{\mathit X}{(4360)}}$ $0^-(1^{- -})$
 ${{\mathit \psi}{(4390)}}$ was ${{\mathit X}{(4390)}}$ $0^-(1^{- -})$
 • ${{\mathit \psi}{(4415)}}$ $0^-(1^{- -})$
 • ${{\mathit Z}_{{c}}{(4430)}}$ was ${{\mathit X}{(4430)}^{\pm}}$ $1^+(1^{+ -})$
 ${{\mathit \chi}_{{c0}}{(4500)}}$ was ${{\mathit X}{(4500)}}$ $0^+(0^{+ +})$
 • ${{\mathit \psi}{(4660)}}$ aka ${{\mathit Y}{(4660)}}$; was ${{\mathit X}{(4660)}}$ $0^-(1^{- -})$
 ${{\mathit \chi}_{{c0}}{(4700)}}$ was ${{\mathit X}{(4700)}}$ $0^+(0^{+ +})$
 • Indicates established particles.