# ${{\boldsymbol \psi}{(2S)}}$ MASS INSPIRE search

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
$\bf{ 3686.10 \pm0.06}$ OUR FIT  Error includes scale factor of 5.9.
$\bf{ 3686.097 \pm0.010}$ OUR AVERAGE
$3686.099$ $\pm0.004$ $\pm0.009$ 1
 2015
KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$3686.12$ $\pm0.06$ $\pm0.10$ 4k
 2012 H
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$3685.95$ $\pm0.10$ 413 2
 2000
OLYA ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$3685.98$ $\pm0.09$ $\pm0.04$ 3
 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. • • •
$3686.114$ $\pm0.007$ ${}^{+0.011}_{-0.016}$ 4
 2012
KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$3686.111$ $\pm0.025$ $\pm0.009$
 2003
KEDR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$3686.00$ $\pm0.10$ 413 5
 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 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.
5  Superseded by ARTAMONOV 2000 .
References:
 ANASHIN 2015
PL B749 50 Final Analysis of KEDR Data on ${{\mathit J / \psi}}$ and ${{\mathit \psi}{(2S)}}$ Masses
 AAIJ 2012H
EPJ C72 1972 Observation of ${{\mathit X}{(3872)}}$ Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 7 TeV
 ANASHIN 2012
PL B711 280 Measurement of Main Parameters of the ${{\mathit \psi}{(2S)}}$ Resonance
 AULCHENKO 2003
PL B573 63 New Precision Measurement of the ${{\mathit J / \psi}}$ and ${{\mathit \psi}^{\,'}}$ Meson Masses
 ARTAMONOV 2000
PL B474 427 High Precision Mass Measurements in ${{\mathit \psi}}$ and ${{\mathit \Upsilon}}$ Families Revisited
 ARMSTRONG 1993B
PR D47 772 Measurement of the ${{\mathit J / \psi}}$ and ${{\mathit \psi}^{\,'}}$ Resonance Parameters in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation
 ZHOLENTZ 1980
PL 96B 214 High Precision Measurement of the ${{\mathit \psi}}$ and ${{\mathit \psi}^{\,'}}$ Meson Masses