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

${{\boldsymbol \psi}{(3770)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$ 

${{\mathit \psi}{(3770)}}$ 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 
In addition to the dominant decay mode to ${{\mathit D}}{{\overline{\mathit D}}}$ , ${{\mathit \psi}{(3770)}}$ was found to decay into the final states containing the ${{\mathit J / \psi}}$ (BAI 2005 , ADAM 2006 ). ADAMS 2006 and HUANG 2006A searched for various decay modes with light hadrons and found a statistically significant signal for the decay to ${{\mathit \phi}}{{\mathit \eta}}$ only (ADAMS 2006 ).
$\Gamma_{1}$ ${{\mathit D}}{{\overline{\mathit D}}}$  $(93^{+8}_{-9})\%$ 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
$\Gamma_{4}$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$  $(1.93\pm{0.28})\times 10^{-3}$ 561
$\Gamma_{5}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$  $(8.0\pm{3.0})\times 10^{-4}$ 565
$\Gamma_{6}$ ${{\mathit J / \psi}}{{\mathit \eta}}$  $(9\pm{4})\times 10^{-4}$ 361
$\Gamma_{7}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$  $<2.8\times 10^{-4}$ CL=90%604
$\Gamma_{8}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$  $(9.6\pm{0.7})\times 10^{-6}$ S=1.3 1887
    constrained fit information