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

${{\boldsymbol J / \psi}{(1S)}}$

$I^G(J^{PC})$ = $0^-(1^{- -})$ 
${{\mathit J / \psi}{(1S)}}$ MASS   $3096.900 \pm0.006$ MeV 
 
${{\mathit J / \psi}{(1S)}}$ WIDTH   $92.6 \pm1.7$ keV (S = 1.1)
 
$\Gamma_{1}$ hadrons  $(87.7\pm{0.5})\%$  
 
$\Gamma_{2}$ virtual ${{\mathit \gamma}}$ $\rightarrow$ hadrons  $(13.50\pm{0.30})\%$  
 
$\Gamma_{3}$ ${{\mathit g}}{{\mathit g}}{{\mathit g}}$  $(64.1\pm{1.0})\%$  
 
$\Gamma_{4}$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$  $(8.8\pm{1.1})\%$  
 
$\Gamma_{5}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$  $(5.971\pm{0.032})\%$ 1548
 
$\Gamma_{6}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ [1] $(8.8\pm{1.4})\times 10^{-3}$ 1548
 
$\Gamma_{7}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$  $(5.961\pm{0.033})\%$ 1545
 
FOOTNOTES