pdgLive

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

INSPIRE JSON PDGID:

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

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

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

This state shows properties different from a conventional ${{\mathit q}}{{\overline{\mathit q}}}$ state. A candidate for an exotic structure. See the review on non-${{\mathit q}}{{\overline{\mathit q}}}$ states. Seen in radiative return from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {s }$ = $9.54 - 10.58$ GeV by WANG 2007D. Also obtained in a combined fit of WANG 2007D, AUBERT 2007S, and LEES 2014F. See also the review on "Spectroscopy of mesons containing two heavy quarks."

${{\mathit \psi}{(4660)}}$ MASS

$4641 \pm10$ MeV (S = 2.7)

${{\mathit \psi}{(4660)}}$ WIDTH

$73 {}^{+13}_{-11}$ MeV (S = 1.7)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

FOOTNOTES

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