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

${{\boldsymbol \eta}_{{c}}{(1S)}}$

$I^G(J^{PC})$ = $0^+(0^{- +})$ 
${{\mathit \eta}_{{c}}{(1S)}}$ MASS   $2983.9 \pm0.4$ MeV (S = 1.2)
 
${{\mathit \eta}_{{c}}{(1S)}}$ WIDTH   $32.0 \pm0.7$ MeV 
 
FOOTNOTES
Constrained Fit information