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

# ${{\boldsymbol \eta}_{{c}}{(2S)}}$ $I^G(J^{PC})$ = $0^+(0^{- +})$

Quantum numbers are quark model predictions.
 ${{\mathit \eta}_{{c}}{(2S)}}$ MASS $3637.5 \pm1.1$ MeV (S = 1.2)
 ${{\mathit \eta}_{{c}}{(2S)}}$ WIDTH $11.3 {}^{+3.2}_{-2.9}$ MeV