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

INSPIRE search
VALUE (MeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{<5.2}$ 90 1
AAIJ
2020S
LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$<16$ 90 2
ABLIKIM
2015S
BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$
$<24$ 90 3
BHARDWAJ
2013
BELL ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}{{\mathit K}^{\pm}}$
1  AAIJ 2020S also provides a limit of $<$ 6.6 MeV with 95$\%$ CL.
2  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.
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.
References:
AAIJ 2020S
JHEP 2008 123 Study of the $\psi_2(3823)$ and $\chi_{c1}(3872)$ states in $B^+ \rightarrow \left( J\psi\pi^+\pi^-\right)K^+$ decays
ABLIKIM 2015S
PRL 115 011803 Observation of the ${{\mathit \psi}}(1{}^{3}D_{2}$) State in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}{{\mathit \chi}_{{c1}}}$ at BESIII
BHARDWAJ 2013
PRL 111 032001 Evidence of a New Narrow Resonance Decaying to ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$ in ${{\mathit B}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}{{\mathit K}}$