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${{\mathit \psi}{(2S)}}$ MASS

INSPIRE   JSON  (beta) PDGID:

M071M

OUR FIT includes measurements of ${\mathit m}_{{{\mathit \psi}{(2S)}}}$, ${\mathit m}_{{{\mathit \psi}{(3770)}}}$, and ${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$.

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 3686.097 \pm0.011}$ OUR FIT  Error includes scale factor of 1.1. $\bf{ 3686.097 \pm0.010}$ OUR AVERAGE $3686.099$ $\pm0.004$ $\pm0.009$ 1 ANASHIN 2015 KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $3686.12$ $\pm0.06$ $\pm0.10$ 4k AAIJ 2012 H LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit X}}$ $3685.95$ $\pm0.10$ 413 2 ARTAMONOV 2000 OLYA ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $3685.98$ $\pm0.09$ $\pm0.04$ 3 ARMSTRONG 1993 B E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ • • We do not use the following data for averages, fits, limits, etc. • • $3686.08$ $\pm0.07$ 1301 4 AAIJ 2023 AP LHCB ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) $3686.114$ $\pm0.007$ ${}^{+0.011}_{-0.016}$ 5 ANASHIN 2012 KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $3686.111$ $\pm0.025$ $\pm0.009$ AULCHENKO 2003 KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $3686.00$ $\pm0.10$ 413 6 ZHOLENTZ 1980 OLYA ${{\mathit e}^{+}}{{\mathit e}^{-}}$ 1  Supersedes AULCHENKO 2003 and ANASHIN 2012. 2  Reanalysis of ZHOLENTZ 1980 using new electron mass (COHEN 1987) and radiative corrections (KURAEV 1985). 3  Mass central value and systematic error recalculated by us according to Eq.$~$(16) in ARMSTRONG 1993B, using the value for the ${{\mathit J / \psi}{(1S)}}$ mass from AULCHENKO 2003. 4  From a fit of a relativistic ${\mathit S}{\mathrm -wave}$ Breit-Wigner convolved with the detector resolution. The width of ${{\mathit \psi}{(2S)}}$ is constrained to the PDG 2022 value. Systematic errors not evaluated. 5  From the scans in 2004 and 2006. ANASHIN 2012 reports the value $3686.114$ $\pm0.007$ $\pm0.011$ ${}^{+0.002}_{-0.012}$ MeV, where the third uncertainty is due to assumptions on the interference between the resonance and hadronic continuum. We combined the two systematic uncertainties. 6  Superseded by ARTAMONOV 2000.

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