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

#### ${{\mathit \eta}_{{c}}{(2S)}}$

$I^G(J^{PC})$ = $0^+(0^{- +})$
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
 $\Gamma_{1}$ hadrons not seen
 $\Gamma_{2}$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ $(1.9\pm{1.2})\%$ 1729
 $\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \eta}}$ $(5\pm{4})\times 10^{-3}$ 1637
 $\Gamma_{4}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$ not seen 1792
 $\Gamma_{5}$ ${{\mathit \rho}^{0}}{{\mathit \rho}^{0}}$ not seen 1645
 $\Gamma_{6}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$ not seen 1749
 $\Gamma_{7}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen 1700
 $\Gamma_{8}$ ${{\mathit K}^{*0}}{{\overline{\mathit K}}^{*0}}$ not seen 1585
 $\Gamma_{9}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $(1.4\pm{1.0})\%$ 1667
 $\Gamma_{10}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$ not seen 1627
 $\Gamma_{11}$ ${{\mathit K}_S^0}$ ${{\mathit K}^{-}}$2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ + c.c. seen 1666
 $\Gamma_{12}$ 2 ${{\mathit K}^{+}}$2 ${{\mathit K}^{-}}$ not seen 1470
 $\Gamma_{13}$ ${{\mathit \phi}}{{\mathit \phi}}$ not seen 1506
 $\Gamma_{14}$ ${{\mathit p}}{{\overline{\mathit p}}}$ seen 1558
 $\Gamma_{15}$ ${{\mathit p}}{{\overline{\mathit p}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen 1461
 $\Gamma_{16}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $(1.9\pm{1.3})\times 10^{-4}$ 1819
 $\Gamma_{17}$ ${{\mathit \gamma}}{{\mathit J / \psi}{(1S)}}$ $<1.4\%$ CL=90% 500
 $\Gamma_{18}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ not seen 1766
 $\Gamma_{19}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}$ not seen 1680
 $\Gamma_{20}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}_{{c}}{(1S)}}$ $<25\%$ CL=90% 537
 FOOTNOTES