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

INSPIRE   JSON PDGID: M071

${{\mathit \psi}{(2S)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$

See the Review on ``Branching Ratios of ${{\mathit \psi}{(2S)}}$, ${{\mathit \chi}}_{c0,1,2}$ and ${{\mathit \eta}_{{{c}}}{(1S)}}$'' before the ${{\mathit \chi}_{{{c0}}}{(1P)}}$ Listings.

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${{\mathit \psi}{(2S)}}$ MASS   $3686.097 \pm0.011$ MeV (S = 1.1)

${\mathit m}_{{{\mathit \psi}{(2S)}}}–{\mathit m}_{{{\mathit J / \psi}{(1S)}}}$   $589.188 \pm0.028$ MeV

${{\mathit \psi}{(2S)}}$ WIDTH   $293 \pm9$ keV (S = 1.2)

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

${{\mathit \psi}{(2S)}}$ DECAY MODES ▸  Expand all decays
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ hadrons   $(97.85\pm{0.13})\%$     $\Gamma_{2}$ virtual ${{\mathit \gamma}}$ $\rightarrow$ hadrons   $(1.79\pm{0.04})\%$     $\Gamma_{3}$ ${{\mathit g}}{{\mathit g}}{{\mathit g}}$   $(10.6\pm{1.6})\%$     $\Gamma_{4}$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$   $(1.03\pm{0.29})\%$     $\Gamma_{5}$ light hadrons   $(15.4\pm{1.5})\%$     $\Gamma_{6}$ ${{\mathit K}_S^0}$ anything   $(16.0\pm{1.1})\%$     $\Gamma_{7}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$   $(7.94\pm{0.22})\times 10^{-3}$ S=1.3  1843   $\Gamma_{8}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$   $(8.0\pm{0.6})\times 10^{-3}$ 1840   $\Gamma_{9}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$   $(3.1\pm{0.4})\times 10^{-3}$ 489   ▸ Decays into ${{\mathit J / \psi}{(1S)}}$ and anything ▸ Hadronic decays ▸ Radiative decays ▸ Weak decays ▸ Other decays
FOOTNOTES

Constrained Fit information