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

${{\boldsymbol \eta}_{{c}}{(1S)}}$ $I^G(J^{PC})$ = $0^+(0^{- +})$ 

${{\mathit \eta}_{{c}}{(1S)}}$ MASS   $2983.9 \pm0.5$ MeV (S = 1.3)
${{\mathit \eta}_{{c}}{(1S)}}$ WIDTH   $31.9 \pm0.7$ MeV 
    constrained fit information