$\bf{
4220 \pm15}$
|
OUR ESTIMATE
|
$\bf{
4218.7 \pm2.8}$
|
OUR AVERAGE
Error includes scale factor of 1.3.
|
$4218.5$ $\pm1.6$ $\pm4.0$ |
|
1 |
|
BES3 |
$4228.6$ $\pm4.1$ $\pm6.3$ |
|
|
|
BES3 |
$4200.6$ ${}^{+7.9}_{-13.3}$ $\pm3.0$ |
|
2 |
|
BES3 |
$4222.0$ $\pm3.1$ $\pm1.4$ |
|
3 |
|
BES3 |
$4218$ ${}^{+5.5}_{-4.5}$ $\pm0.9$ |
|
|
|
BES3 |
$4209.5$ $\pm7.4$ $\pm1.4$ |
|
4 |
|
BES3 |
• • • We do not use the following data for averages, fits, limits, etc. • • • |
$4230$ $\pm8$ $\pm6$ |
180 |
5 |
|
BES3 |
1
From a fit of the measured cross section from $\sqrt {s }$ = $4.178 - 4.278$ GeV. Supersedes ABLIKIM 2015C.
|
2
Simultaneous fit to ${{\mathit \chi}_{{c1}}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit J / \psi}}$ and ${{\mathit \chi}_{{c1}}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ .
|
3
From a three-resonance fit.
|
4
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${}^{-1}$.
|
5
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 ${{\mathit \omega}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ .
|