pdgLive

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

INSPIRE JSON (beta) PDGID:

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

$I^G(J^{PC})$ = $0^-(1^{- -})$

${{\mathit J / \psi}{(1S)}}$ MASS

$3096.900 \pm0.006$ MeV

${{\mathit J / \psi}{(1S)}}$ WIDTH

$92.6 \pm1.7$ keV (S = 1.1)

Decay Modes ▸ Expand all decays

$(87.7\pm{0.5})\%$

virtual ${{\mathit \gamma}}$ $\rightarrow$ hadrons

$(13.50\pm{0.30})\%$

${{\mathit g}}{{\mathit g}}{{\mathit g}}$

$(64.1\pm{1.0})\%$

${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$

$(8.8\pm{1.1})\%$

${{\mathit e}^{+}}{{\mathit e}^{-}}$

$(5.971\pm{0.032})\%$

${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$

$(8.8\pm{1.4})\times 10^{-3}$

${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

$(5.961\pm{0.033})\%$

▸	Decays involving hadronic resonances

▸	Decays into stable hadrons

▸	Radiative decays

▸	Dalitz decays

▸	Weak decays

▸	Charge conjugation ($\mathit C$), Parity ($\mathit P$), Lepton Family number ($\mathit LF$) violating modes

▸	Other decays

FOOTNOTES

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.