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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: M189

${{\mathit \psi}{(4660)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$

also known as ${{\mathit Y}{(4660)}}$; was ${{\mathit X}{(4660)}}$

See the reviews on the "Spectroscopy of Mesons Containing two Heavy Quarks" and on  "Heavy Non-qqbar Mesons."

${{\mathit \psi}{(4660)}}$ MASS $4623$ $\pm10$ MeV (S = 3.7)

${{\mathit \psi}{(4660)}}$ WIDTH $55$ $\pm9$ MeV (S = 1.9)

${{\mathit \psi}{(4660)}}$ DECAY MODES

Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ not seen 2311   $\Gamma_{2}$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen 803   $\Gamma_{3}$ ${{\mathit J / \psi}}{{\mathit \eta}}$ not seen 1186   $\Gamma_{4}$ ${{\mathit D}^{0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ not seen 1146   $\Gamma_{5}$ ${{\mathit D}^{*0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ seen 1011   $\Gamma_{6}$ ${{\mathit \psi}_{{{2}}}{(3823)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen 684   $\Gamma_{7}$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ not seen 978   $\Gamma_{8}$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \phi}}$ not seen 387   $\Gamma_{9}$ ${{\mathit \chi}_{{{c2}}}}{{\mathit \gamma}}$ not seen 943   $\Gamma_{10}$ ${{\mathit \chi}_{{{c2}}}}{{\mathit \phi}}$ not seen 275   $\Gamma_{11}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \Lambda}_{{{c}}}^{-}}$ seen 338   $\Gamma_{12}$ ${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s1}}}{(2536)}^{-}}$ seen 517   $\Gamma_{13}$ ${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s2}}}^{*}{(2573)}^{-}}$ seen     $\Gamma_{14}$ ${{\mathit \omega}}{{\mathit \pi}^{0}}$ not seen 2243   $\Gamma_{15}$ ${{\mathit \omega}}{{\mathit \eta}}$ not seen 2211   $\Gamma_{16}$ ${{\mathit \Sigma}^{+}}{{\overline{\mathit \Sigma}}^{-}}$ not seen 1982   $\Gamma_{17}$ ${{\mathit \Xi}^{0}}{{\overline{\mathit \Xi}}^{0}}$ 1901   $\Gamma_{18}$ ${{\mathit \Xi}^{-}}{{\overline{\mathit \Xi}}^{+}}$ not seen 1896   $\Gamma_{19}$ ${{\mathit p}}{{\mathit K}^{-}}{{\overline{\mathit \Lambda}}}$ + c.c. not seen 1924   $\Gamma_{20}$ ${{\mathit \Lambda}}{{\overline{\mathit \Xi}}^{+}}{{\mathit K}^{-}}$ + c.c. not seen 1784   $\Gamma_{21}$ ${{\mathit \Sigma}^{0}}{{\overline{\mathit \Xi}}^{+}}{{\mathit K}^{-}}$ + c.c. not seen 1749