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

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

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)

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

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

${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

${{\mathit J / \psi}}{{\mathit \eta}}$

${{\mathit D}^{0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$

${{\mathit D}^{*0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$

${{\mathit \psi}_{{{2}}}{(3823)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

${{\mathit \chi}_{{{c0}}}}{{\mathit \phi}}$

${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$

${{\mathit \chi}_{{{c1}}}}{{\mathit \phi}}$

${{\mathit \chi}_{{{c2}}}}{{\mathit \gamma}}$

${{\mathit \chi}_{{{c2}}}}{{\mathit \phi}}$

${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \Lambda}_{{{c}}}^{-}}$

${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s1}}}{(2536)}^{-}}$

${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s2}}}^{*}{(2573)}^{-}}$

${{\mathit \omega}}{{\mathit \pi}^{0}}$

${{\mathit \omega}}{{\mathit \eta}}$

${{\mathit \Sigma}^{+}}{{\overline{\mathit \Sigma}}^{-}}$

${{\mathit \Sigma}^{0}}{{\overline{\mathit \Sigma}}^{0}}$

${{\mathit \Xi}^{0}}{{\overline{\mathit \Xi}}^{0}}$

${{\mathit \Xi}^{-}}{{\overline{\mathit \Xi}}^{+}}$

${{\mathit p}}{{\mathit K}^{-}}{{\overline{\mathit \Lambda}}}$ + c.c.

${{\mathit \Lambda}}{{\overline{\mathit \Xi}}^{+}}{{\mathit K}^{-}}$ + c.c.

${{\mathit \Sigma}^{0}}{{\overline{\mathit \Xi}}^{+}}{{\mathit K}^{-}}$ + c.c.

${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\overline{\mathit \Xi}}^{+}}$ + c.c.