pdgLive Home   >   ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS (including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)   >   ${{\mathit \psi}{(4230)}}$   >   ${{\mathit \psi}{(4230)}}$ MASS

${{\mathit \psi}{(4230)}}$ MASS

INSPIRE   JSON  (beta) PDGID:

M222M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 4220 \pm15}$ OUR ESTIMATE $\bf{ 4219.1 \pm1.7}$ OUR AVERAGE  Error includes scale factor of 1.1. $4216.7$ $\pm8.9$ $\pm4.1$ 1 ABLIKIM 2020 AG BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ $4220.4$ $\pm2.4$ $\pm2.3$ 2 ABLIKIM 2020 N BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit J / \psi}}$ $4218.6$ $\pm3.8$ $\pm2.5$ 2 ABLIKIM 2020 O BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit J / \psi}}$ $4218.5$ $\pm1.6$ $\pm4.0$ 3 ABLIKIM 2019 AI BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \chi}_{{{c0}}}}$ $4228.6$ $\pm4.1$ $\pm6.3$ ABLIKIM 2019 R BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit D}^{0}}{{\mathit D}^{*-}}$ + c.c. $4200.6$ ${}^{+7.9}_{-13.3}$ $\pm3.0$ 4 ABLIKIM 2019 V BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}{(3872)}}$ $4222.0$ $\pm3.1$ $\pm1.4$ 5 ABLIKIM 2017 B BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ $4218$ ${}^{+5.5}_{-4.5}$ $\pm0.9$ ABLIKIM 2017 G BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit h}_{{{c}}}}$ $4209.5$ $\pm7.4$ $\pm1.4$ 6 ABLIKIM 2017 V BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ • • We do not use the following data for averages, fits, limits, etc. • • $4231.9$ $\pm5.3$ $\pm4.9$ ABLIKIM 2020 N BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}^{0}}$ , ${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit J / \psi}}$ $4230$ $\pm8$ $\pm6$ 180 7 ABLIKIM 2015 C BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \chi}_{{{c0}}}}$ 1  Solution 1 of 8 with equal fit quality to the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ cross section between 3.8 and 4.6 GeV to the coherent sum of four resonant amplitudes. Other solutions range from $4212.8$ $\pm7.2$ $\pm4.0$ to $4219.4$ $\pm11.2$ $\pm4.1$ MeV. 2  From a fit of the measured cross section in the range $\sqrt {s }$ = $3.808 - 4.600$ GeV. 3  From a fit of the measured cross section from $\sqrt {s }$ = $4.178 - 4.278$ GeV. Supersedes ABLIKIM 2015C. 4  Simultaneous fit to ${{\mathit \chi}_{{{c1}}}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit J / \psi}}$ and ${{\mathit \chi}_{{{c1}}}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$. 5  From a three-resonance fit. 6  From a fit to the cross section for ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $\rightarrow$ 2 ( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ obtained from 16 center-of-mass energies between 4.008 and 4.600 GeV and comprising 5.1 fb${}^{-1}$. 7  From a 3-parameter fit of measured cross sections from $\sqrt {s }$ = $4.21 - 4.42$ GeV to a phase-space modified Breit-Wigner function, using the decays ${{\mathit \chi}_{{{c0}}}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$, ${{\mathit \chi}_{{{c0}}}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$, and ${{\mathit \omega}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$.

References