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

${{\boldsymbol \psi}{(2S)}}$

$I^G(J^{PC})$ = $0^-(1^{- -})$ 
See the Review on “${{\mathit \psi}{(2S)}}$ and ${{\mathit \chi}_{{c}}}$ branching ratios” before the ${{\mathit \chi}_{{c0}}{(1P)}}$ Listings.
${{\mathit \psi}{(2S)}}$ MASS   $3686.10 \pm0.06$ MeV (S = 5.9)
 
${\mathit m}_{{{\mathit \psi}{(2S)}}}–{\mathit m}_{{{\mathit J / \psi}{(1S)}}}$   $589.188 \pm0.028$ MeV 
 
${{\mathit \psi}{(2S)}}$ WIDTH   $294 \pm8$ keV 
 
$\Gamma_{1}$ hadrons  $(97.85\pm{0.13})\%$  
 
$\Gamma_{2}$ virtual ${{\mathit \gamma}}$ $\rightarrow$ hadrons  $(1.73\pm{0.14})\%$ S=1.5   
 
$\Gamma_{3}$ ${{\mathit g}}{{\mathit g}}{{\mathit g}}$  $(10.6\pm{1.6})\%$  
 
$\Gamma_{4}$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$  $(1.03\pm{0.29})\%$  
 
$\Gamma_{5}$ light hadrons  $(15.4\pm{1.5})\%$  
 
$\Gamma_{6}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$  $(7.93\pm{0.17})\times 10^{-3}$ 1843
 
$\Gamma_{7}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$  $(8.0\pm{0.6})\times 10^{-3}$ 1840
 
$\Gamma_{8}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$  $(3.1\pm{0.4})\times 10^{-3}$ 489
 
FOOTNOTES
Constrained Fit information