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

#### ${{\mathit \psi}{(3770)}}$

$I^G(J^{PC})$ = $0^-(1^{- -})$
 ${{\mathit \psi}{(3770)}}$ MASS (MeV) $3773.7 \pm0.4$ MeV (S = 1.4)
 ${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ $87.6 \pm0.4$ MeV (S = 1.4)
 ${{\mathit \psi}{(3770)}}$ WIDTH $27.2 \pm1.0$ MeV
 $\Gamma_{1}$ ${{\mathit D}}{{\overline{\mathit D}}}$ $(93^{+8}_{-9})\%$ S=2.0 287
 $\Gamma_{2}$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ $(52^{+4}_{-5})\%$ S=2.0 287
 $\Gamma_{3}$ ${{\mathit D}^{+}}{{\mathit D}^{-}}$ $(41\pm{4})\%$ S=2.0 254
 $\Gamma_{4}$ ${{\mathit J / \psi}}{{\mathit X}}$ $(5.0\pm{2.2})\times 10^{-3}$
 $\Gamma_{5}$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $(1.93\pm{0.28})\times 10^{-3}$ 561
 $\Gamma_{6}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $(8.0\pm{3.0})\times 10^{-4}$ 565
 $\Gamma_{7}$ ${{\mathit J / \psi}}{{\mathit \eta}}$ $(9\pm{4})\times 10^{-4}$ 361
 $\Gamma_{8}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$ $<2.8\times 10^{-4}$ CL=90% 604
 $\Gamma_{9}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $(9.6\pm{0.7})\times 10^{-6}$ S=1.3 1887
 FOOTNOTES