pdgLive Home   >   ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS (including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)   >   ${{\mathit \psi}{(4660)}}$   >   ${{\mathit \psi}{(4660)}}$ MASS

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

INSPIRE   JSON  (beta) PDGID:

M189M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 4623 \pm10}$ OUR AVERAGE  Error includes scale factor of 3.7.  See the ideogram below. $4603.1$ $\pm3.9$ $\pm0.8$ 1 ABLIKIM 2024 BN BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s2}}}^{*}{(2573)}^{-}}$ $4584$ $\pm14$ $\pm80$ 2 ABLIKIM 2024 BN BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s1}}}{(2536)}^{-}}$ $4708$ ${}^{+17}_{-15}$ $\pm21$ 3 ABLIKIM 2023 BI BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit J / \psi}}$ $4701.8$ $\pm10.9$ $\pm2.7$ 4 ABLIKIM 2023 H BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \chi}_{{{c2}}}}$ $4675.3$ $\pm29.5$ $\pm3.5$ 5 ABLIKIM 2023 X BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ $4651.0$ $\pm37.8$ $\pm2.1$ 6 ABLIKIM 2021 AJ BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $4619.8$ ${}^{+8.9}_{-8.0}$ $\pm2.3$ 66 7 JIA 2020 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s2}}}^{*}{(2573)}^{-}}$ $4625.9$ ${}^{+6.2}_{-6.0}$ $\pm0.4$ 89 8 JIA 2019 A BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit D}_{{{s}}}^{+}}{{\mathit D}_{{{s1}}}{(2536)}^{-}}$ $4652$ $\pm10$ $\pm11$ 279 9 WANG 2015 A BELL 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $4669$ $\pm21$ $\pm3$ 37 10 LEES 2014 F BABR 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $4634$ ${}^{+8}_{-7}$ ${}^{+5}_{-8}$ 142 11 PAKHLOVA 2008 B BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \Lambda}_{{{c}}}^{-}}$ • • We do not use the following data for averages, fits, limits, etc. • • $4647.9$ $\pm8.6$ $\pm0.8$ 12 ABLIKIM 2022 R BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ $4652.5$ $\pm3.4$ $\pm1.1$ 13 DAI 2017 RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \Lambda}_{{{c}}}^{-}}$ $4645.2$ $\pm9.5$ $\pm6.0$ 14 ZHANG 2017 B RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $4646.4$ $\pm9.7$ $\pm4.8$ 15 ZHANG 2017 C RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ or ${{\mathit \psi}{(2S)}}$ $4661$ ${}^{+9}_{-8}$ $\pm6$ 44 16 LIU 2008 H RVUE 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ $4664$ $\pm11$ $\pm5$ 44 WANG 2007 D BELL 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ 1  Extracted in a fit that employs two BW resonances. The second one at about 4720 MeV shows low statistical significance of 2.7 $\sigma $. 2  Extracted from a fit with two BW functions. The second one located at about 4750 MeV show a low statistical significance of 4.3 $\sigma $. 3  Seen as a peak in the c.m. energy dependence of the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit J / \psi}}$ cross section using 5.85 ${\mathrm {fb}}{}^{-1}$ of data at c.m. energies $4.61 - 4.95$ GeV. Statistical significance is over 5$\sigma $. 4  Fit model parameterized as the coherent sum of a Breit-Wigner resonance and a continuum amplitude term. 5  From a cross-section measurement of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ between 4.189 and 4.951 GeV, assuming a coherent sum of 3 Breit-Wigner resonances plus a continuum amplitude. The two other resonances have masses (widths) $4209.6$ $\pm7.5$ ($81.6$ $\pm19.9$) MeV and $4469.1$ $\pm26.4$ ($246.3$ $\pm37.9$) MeV. 6  From a three-resonance fit to the Born cross section in the range $\sqrt {s }$ = $4.008 - 4.698$ GeV. 7  Using ${{\mathit D}_{{{s2}}}^{*}{(2573)}^{-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{0}}{{\mathit K}^{-}}$ decays. 8  From a fit of a Breit-Wigner convolved with a Gaussian. 9  From a two-resonance fit. Supersedes WANG 2007D. 10  From a two-resonance fit. 11  The ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ and ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \Lambda}_{{{c}}}^{-}}$ states are not necessarily the same. 12  From a fit to the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(3823)}}$ cross section between 4.23 and 4.70 GeV with two coherent Breit-Wigner resonances. The data is also consistent with a single peak with mass $4417.5$ $\pm26.2$ $\pm3.5$ MeV and width $245$ $\pm48$ $\pm13$ MeV. 13  The pole parameters are extracted from the speed plot. 14  From a three-resonance fit. 15  From a combined fit of BELLE, BABAR and BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ data. 16  From a combined fit of AUBERT 2007S and WANG 2007D data with two resonances.

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

References