${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M053

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

$I^G(J^{PC})$ = $0^-(1^{- -})$ 
${{\mathit \psi}{(3770)}}$ MASS (MeV)   $3773.7 \pm0.7$ MeV (S = 2.3)
 
${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$   $87.6 \pm0.7$ MeV (S = 2.3)
 
${{\mathit \psi}{(3770)}}$ 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
 
$\Gamma_{7}$ ${{\mathit J / \psi}}{{\mathit \eta}}$   $(8.7\pm{1.2})\times 10^{-4}$ 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
Constrained Fit information