pdgLive

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

INSPIRE JSON PDGID:

${{\mathit \psi}{(4360)}}$

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

also known as ${{\mathit Y}{(4360)}}$; was ${{\mathit X}{(4360)}}$

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 AUBERT 2007S, WANG 2007D, and LEES 2014F. See also the review on "Spectroscopy of mesons containing two heavy quarks."

${{\mathit \psi}{(4360)}}$ MASS

$4374 \pm7$ MeV (S = 2.4)

${{\mathit \psi}{(4360)}}$ WIDTH

$118 \pm12$ MeV (S = 2.1)

${{\mathit \psi}{(4360)}}$ DECAY MODES

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

${{\mathit h}_{{{c}}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

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

${{\mathit \psi}{(3770)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

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

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

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

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

${{\mathit D}_{{{1}}}{(2420)}}{{\overline{\mathit D}}}$ + c.c.

${{\mathit \phi}}{{\mathit \eta}}$

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

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

${{\mathit p}}{{\overline{\mathit p}}}{{\mathit \eta}}$

${{\mathit p}}{{\overline{\mathit p}}}{{\mathit \omega}}$

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

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

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

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

FOOTNOTES

Except where otherwise noted, content of the 2024 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2024. See LBNL disclaimers.