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

# ${{\boldsymbol R}_{{c0}}{(4240)}}$ $I^G(J^{PC})$ = $1^+(0^{- -})$ I, G, C need confirmation.

was ${{\mathit X}{(4240)}^{\pm}}$
Properties incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure (exotic state). See the review on non- ${{\mathit q}}{{\overline{\mathit q}}}$ states. Spin and parity assigment $\mathit J{}^{P} = 0{}^{-}$ is favored over ${}^{}1{}^{-}$, ${}^{}2{}^{-}$, and ${}^{}2{}^{+}$ by 8 $\sigma$ and over ${}^{}1{}^{+}$ by 1 $\sigma$, according to the four-dimensional amplitude analysis of AAIJ 2014AG.
 ${{\mathit R}_{{c0}}{(4240)}}$ MASS $4239 {}^{+50}_{-21}$ MeV
 ${{\mathit R}_{{c0}}{(4240)}}$ WIDTH $220 {}^{+120}_{-90}$ MeV