${\mathit m}_{{{\mathit \chi}_{{{c1}}}{(3872)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$

INSPIRE   JSON  (beta) PDGID:
M176DM2
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$185.598$ $\pm0.067$ $\pm0.068$ 15.6k 1
AAIJ
2020AD
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$185.54$ $\pm0.06$ 19.8k 2
AAIJ
2020S
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$187.4$ $\pm1.4$ 25 3
AUBERT
2005R
BABR ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
1  Using ${{\mathit \chi}_{{{c1}}}{(3872)}}$ produced in inclusive ${{\mathit b}}$-hadron decays. Breit-Wigner parametrization. Superseded by the combined value in AAIJ 2020S.
2  Combining ${\mathit m}_{{{\mathit \chi}_{{{c1}}}{(3872)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ = $185.49$ $\pm0.06$ $\pm0.03$ MeV from AAIJ 2020S and the measured mass difference from AAIJ 2020AD. Breit-Wigner parametrization.
3  Superseded by AUBERT 2006.
References