${{\mathit \psi}_{{{2}}}{(3823)}}$ MASS

INSPIRE   PDGID:
M212M
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 3823.51 \pm0.34}$ OUR AVERAGE
$3824.5$ $\pm2.4$ $\pm1.0$ 30 1
ABLIKIM
2023J
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
$3823.12$ $\pm0.43$ $\pm0.13$ 120
ABLIKIM
2022R
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
$3824.08$ $\pm0.53$ $\pm0.14$ 137 2
AAIJ
2020S
 LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}$
$3823.1$ $\pm1.8$ $\pm0.7$ $33$ $\pm10$ 3
BHARDWAJ
2013
BELL ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}{{\mathit K}^{\pm}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$3821.7$ $\pm1.3$ $\pm0.7$ $19$ $\pm5$ 4
ABLIKIM
2015S
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
1  Using the measured ${\mathit m}_{{{\mathit \psi}_{{{2}}}{(3823)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ and assuming ${\mathit m}_{{{\mathit \psi}{(2S)}}}$ = $3686.097$ MeV from PDG 2022.
2  Using the measured ${\mathit m}_{{{\mathit \psi}_{{{2}}}{(3823)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ = $137.98$ $\pm0.53$ $\pm0.14$ MeV.
3  From a simultaneous fit to ${{\mathit B}^{\pm}}$ $\rightarrow$ ( ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$) ${{\mathit K}^{\pm}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ( ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$) ${{\mathit K}_S^0}$ with significance 4.0$\sigma $ including systematics. Corrected for the measured ${{\mathit \psi}{(2S)}}$ mass using ${{\mathit B}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit K}}$ $\rightarrow$ ( ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}}$) ${{\mathit K}}$ decays.
4  From a simultaneous unbinned maximum likelihood fit of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ data (the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ recoil mass) taken at $\sqrt {s }$ values of 4.23, 4.26, 4.36, 4.42, and 4.60 GeV to simulated events including both ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ and ${{\mathit \psi}_{{{2}}}{(3823)}}$ $\rightarrow$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ together, with floating mass scale offset for ${{\mathit \psi}{(2S)}}$, floating ${{\mathit \psi}_{{{2}}}{(3823)}}$ mass, and zero ${{\mathit \psi}_{{{2}}}{(3823)}}$ width, resulting in a significance of 5.9$\sigma $ when including systematic uncertainties. Superseded by ABLIKIM 22R.
References