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

INSPIRE   PDGID:
M212W
VALUE (MeV) CL% EVTS DOCUMENT ID TECN  COMMENT
$\bf{<2.9}$ 90 120
ABLIKIM
2022R
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$<18.8$ 90 30 1
ABLIKIM
2023J
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
$<5.2$ 90 2
AAIJ
2020S
 LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}$
$<16$ 90 3
ABLIKIM
2015S
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$
$<24$ 90 4
BHARDWAJ
2013
BELL ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}{{\mathit K}^{\pm}}$
1  From a fit of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \chi}_{{{c1}}}}{{\mathit \gamma}}$ data at $\sqrt {s }$ values from 4.23 to 4.70 GeV to a Breit-Wigner function with floating width, using the Bayesian approach.
2  AAIJ 2020S also provides a limit of $<$ 6.6 MeV with 95$\%$ CL.
3  From a 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 a Breit-Wigner function with the mass fixed from the likelihood fit above, Gaussian resolution smearing, and floating width.
4  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.
References