pdgLive

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

INSPIRE JSON PDGID:

${{\mathit \psi}{(4415)}}$

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

${{\mathit \psi}{(4415)}}$ MASS

$4415$ $\pm5$ MeV

${{\mathit \psi}{(4415)}}$ WIDTH

$110$ $\pm13$ MeV (S = 1.6)

${{\mathit \psi}{(4415)}}$ DECAY MODES

Due to the complexity of the ${{\mathit c}}{{\overline{\mathit c}}}$ threshold region, in this listing, ``seen'' (``not seen'') means that a cross section for the mode in question has been measured at effective $\sqrt {s }$ near this particle's central mass value, more (less) than 2${{\mathit \sigma}}$ above zero, without regard to any peaking behavior in $\sqrt {s }$ or absence thereof. See mode listing(s) for details and references.

Mode

Fraction ($\Gamma_i$ / $\Gamma$)

Scale Factor/
Conf. Level

P(MeV/c)

${{\mathit D}}{{\overline{\mathit D}}}$

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

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

${{\mathit D}^{*}}{{\overline{\mathit D}}}$ + c.c.

${{\mathit D}^{*}{(2007)}^{0}}{{\overline{\mathit D}}^{0}}$ + c.c.

${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{-}}$ + c.c.

${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}$

${{\mathit D}^{*}{(2007)}^{0}}{{\overline{\mathit D}}^{*}{(2007)}^{0}}$ + c.c.

${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{*}{(2010)}^{-}}$ + c.c.

${{\mathit D}^{0}}{{\mathit D}^{-}}{{\mathit \pi}^{+}}$ (excl. ${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{-}}$ +c.c.

${{\mathit D}}{{\overline{\mathit D}}_{{{2}}}^{*}{(2460)}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit D}^{-}}{{\mathit \pi}^{+}}$ +c.c.

($10$ $\pm4$ ) $\%$

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

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

${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s}}}^{-}}$

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

($9$ $\pm4$) $ \times 10^{-3}$

${{\mathit D}_{{{s}}}^{*+}}{{\mathit D}_{{{s}}}^{-}}$ +c.c.

${{\mathit D}_{{{s}}}^{*+}}{{\mathit D}_{{{s}}}^{*-}}$

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

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

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

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

$<1.3$ $\times 10^{-3}$

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

$<7$ $\times 10^{-3}$

${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}$

$<5$ $\times 10^{-6}$

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

$<1.8$ $\times 10^{-4}$

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

$<1.4$ $\times 10^{-4}$

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

$<6$ $\times 10^{-5}$

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

$<1.0$ $\times 10^{-5}$

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

$<4$ $\times 10^{-5}$

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

$<2.5$ $\times 10^{-4}$

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

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

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

($3.2$ $\pm1.2$) $ \times 10^{-6}$

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

($1.1$ $\pm0.4$) $ \times 10^{-5}$

Except where otherwise noted, content of the 2025 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. © 2025. See LBNL disclaimers.