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

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

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${{\mathit J / \psi}{(1S)}}$ MASS   $3096.900 \pm0.006$ MeV

${{\mathit J / \psi}{(1S)}}$ WIDTH   $92.6 \pm1.7$ keV (S = 1.1)

${{\boldsymbol J / \psi}{(1S)}}$ Decay Modes ▸ Expand all decays
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c) $\Gamma_{1}$ 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   ▸ Decays involving hadronic resonances ▸ Decays into stable hadrons ▸ Radiative decays ▸ Dalitz decays ▸ Weak decays ▸ Charge conjugation ($\boldsymbol C$), Parity ($\boldsymbol P$), Lepton Family number ($\boldsymbol LF$) violating modes ▸ Other decays
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