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

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 10.8 \pm0.6}$ OUR FIT
$\bf{ 10.5 \pm0.8}$ OUR AVERAGE  Error includes scale factor of 1.1.
$10.6$ $\pm1.9$ $\pm2.6$ 5.4k
 2008
BELL ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ hadrons
$12.6$ ${}^{+1.5}_{-1.6}$ ${}^{+0.9}_{-1.1}$
 2005 G
BES2 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{c0}}}$
$8.6$ ${}^{+1.7}_{-1.3}$ $\pm0.1$
 2003
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$9.7$ $\pm1.0$ 392 1
 2002
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \chi}_{{c0}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \gamma}}$
$16.6$ ${}^{+5.2}_{-3.7}$ $\pm0.1$
 1999 B
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$
$14.3$ $\pm2.0$ $\pm3.0$
 1998 I
BES ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$13.5$ $\pm3.3$ $\pm4.2$
 1986
CBAL ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X, ${{\mathit \gamma}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$13.2$ $\pm2.1$ 266
 2013
BELL ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$
1  Recalculated by ANDREOTTI 2005A.
References:
 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
 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
 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 1998I
PRL 81 3091 Study of the $\mathit P$-Wave Charmonium State ${{\mathit \chi}_{{cJ}}}$ in ${{\mathit \psi}{(2S)}}$ Decays
 GAISER 1986
PR D34 711 Charmonium Spectroscopy from Inclusive ${{\mathit \psi}^{\,'}}$ and ${{\mathit J / \psi}}$ Radiative Decays
see fit info