${\boldsymbol {\boldsymbol c}}$ ${\boldsymbol {\overline{\boldsymbol c}}}$ MESONS
(including possibly non- ${\boldsymbol {\boldsymbol q}}$ ${\boldsymbol {\overline{\boldsymbol q}}}$ 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

▸	MULTIPOLE AMPLITUDE RATIOS IN RADIATIVE DECAYS ${{\boldsymbol \psi}{(2S)}}$ $\rightarrow$ ${{\boldsymbol \gamma}}{{\boldsymbol \chi}_{{cJ}}{(1P)}}$ and ${{\boldsymbol \chi}_{{cJ}}}$ $\rightarrow$ ${{\boldsymbol \gamma}}{{\boldsymbol J / \psi}{(1S)}}$

Decay Modes ▸ Expand all decays

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

$(1.73\pm{0.14})\%$

S=1.5

$\Gamma_{3}$

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

$(10.6\pm{1.6})\%$

$\Gamma_{4}$

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

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

$(7.93\pm{0.17})\times 10^{-3}$

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

▸	Decays into ${{\mathit J / \psi}{(1S)}}$ and anything

▸	Hadronic decays

▸	Radiative decays

▸	Weak decays

▸	Other decays

constrained fit information