# ${{\boldsymbol \chi}_{{c0}}{(1P)}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 3414.71 \pm0.30}$ OUR AVERAGE
$3413.0$ $\pm1.9$ $\pm0.6$ 933 1
 2017 BB
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}{{\mathit X}}$ $\rightarrow$ 2( ${{\mathit K}^{+}}{{\mathit K}^{-}}$) ${{\mathit X}}$
$3414.2$ $\pm0.5$ $\pm2.3$ 5.4k
 2008
BELL ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ hadrons
$3406$ $\pm7$ $\pm6$ 230 2
 2007
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$( ${{\mathit c}}{{\overline{\mathit c}}}$)
$3414.21$ $\pm0.39$ $\pm0.27$
 2005 G
BES2 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{c0}}}$
$3414.7$ ${}^{+0.7}_{-0.6}$ $\pm0.2$ 3
 2003
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$3415.5$ $\pm0.4$ $\pm0.4$ 392 4
 2002
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \gamma}}$
$3417.4$ ${}^{+1.8}_{-1.9}$ $\pm0.2$ 3
 1999 B
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$
$3414.1$ $\pm0.6$ $\pm0.8$
 1999 B
BES ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
$3417.8$ $\pm0.4$ $\pm4$ 3
 1986
CBAL ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
$3416$ $\pm3$ $\pm4$ 5
 1978
MRK1 ${{\mathit e}^{+}}{{\mathit e}^{-}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$3414.6$ $\pm1.1$ 266
 2013
BELL ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$
$3416.5$ $\pm3.0$
 2001
CLE2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \chi}_{{{c0}}}}$
$3422$ $\pm10$ 5
 1978 B
CNTR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$
$3415$ $\pm9$ 5
 1977
CNTR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
1  From a fit of the ${{\mathit \phi}}{{\mathit \phi}}$ invariant mass with the width of ${{\mathit \chi}_{{c0}}{(1P)}}$ fixed to the PDG 2016 value.
2  From a fit of the ${{\mathit J / \psi}}$ recoil mass spectrum. Supersedes ABE,K 2002 and ABE 2004G.
3  Using mass of ${{\mathit \psi}{(2S)}}$ = 3686.0 MeV.
4  Recalculated by ANDREOTTI 2005A, using the value of ${{\mathit \psi}{(2S)}}$ mass from AULCHENKO 2003 .
5  Mass value shifted by us by amount appropriate for ${{\mathit \psi}{(2S)}}$ mass = 3686 MeV and ${{\mathit J / \psi}{(1S)}}$ mass = 3097 MeV.
References:
 AAIJ 2017BB
EPJ C77 609 Study of Charmonium Production in hadron Decays and First Evidence for the Decay ${{\mathit B}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}{{\mathit \phi}}$
 UEHARA 2013
PTEP 2013 123C01 High-Statistics Study of ${{\mathit K}_S^0}$ Pair Production in Two-Photon Collisions
 UEHARA 2008
EPJ C53 1 Study of Charmonia in Four-Meson Final States Produced in Two-Photon Collisions
 ABE 2007
PRL 98 082001 Observation of a Charmoniumlike State Produced in Association with ${{\mathit J / \psi}}$ in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation at $\sqrt {s }$ $\sim{}$ 10.6 GeV
 ABLIKIM 2005G
PR D71 092002 Precise Measurement of Spin-Averaged ${{\mathit \chi}_{{cJ}}{(1P)}}$ Mass using Photon Conversions in ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{cJ}}}$
 ANDREOTTI 2003
PRL 91 091801 Interference Study of the $\chi _{c0}(1{}^{3}\mathit P_{0}$) in the Reaction ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
 BAGNASCO 2002
PL B533 237 New Measurements of the Resonances Parameters of the ${{\mathit \chi}_{{c0}}}(1{}^{3}P_{0}$) State of Charmonium
 EISENSTEIN 2001
PRL 87 061801 Experimental Investigation of the Two Photon Widths of the ${{\mathit \chi}_{{c0}}}$ and the ${{\mathit \chi}_{{c2}}}$ Mesons
 AMBROGIANI 1999B
PRL 83 2902 Study of the ${{\mathit \chi}_{{c0}}}(1{}^{3}{{\mathit P}_{{0}}}$) State of Charmonium Formed in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations
 BAI 1999B
PR D60 072001 Study of the Hadronic Decays of ${{\mathit \chi}_{{c}}}$ States
 GAISER 1986
PR D34 711 Charmonium Spectroscopy from Inclusive ${{\mathit \psi}^{\,'}}$ and ${{\mathit J / \psi}}$ Radiative Decays
 BARTEL 1978B
PL 79B 492 Cascade Radiative Decays of ${{\mathit \psi}^{\,'}{(3684)}}$ and Evidence for a New Intermediate State of Even $\mathit C$ Parity
 TANENBAUM 1978
PR D17 1731 Radiative Decays of the ${{\mathit \psi}^{\,'}{(3684)}}$ into High Mass States
 BIDDICK 1977
PRL 38 1324 Inclusive ${{\mathit \gamma}}$-ray Spectra from ${{\mathit \psi}{(3095)}}$ and ${{\mathit \psi}^{\,'}{(3684)}}$