# ${{\boldsymbol \chi}_{{c1}}{(1P)}}$ WIDTH INSPIRE search

VALUE (MeV) CL% EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 0.84 \pm0.04}$ OUR FIT
$\bf{ 0.88 \pm0.05}$ OUR AVERAGE
$1.39$ ${}^{+0.40}_{-0.38}$ ${}^{+0.26}_{-0.77}$
 2005 G
BES2 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{c1}}}$
$0.876$ $\pm0.045$ $\pm0.026$
 2005 A
E835 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$
$0.87$ $\pm0.11$ $\pm0.08$ 513 1
 1992
E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$<1.3$ 95
 1986 B
SPEC ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ X
$<3.8$ 90
 1986
CBAL ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
1  Recalculated by ANDREOTTI 2005A.
References:
 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 2005A
NP B717 34 Measurement of the Resonance Parameters of the ${{\mathit \chi}_{{1}}}(1{}^{3}P_{1}$) and ${{\mathit \chi}_{{2}}}(1{}^{3}P_{2}$) States of Charmonium Formed in Antiproton-Proton Annihilations
 ARMSTRONG 1992
NP B373 35 Study of the ${{\mathit \chi}_{{1}}}$ and ${{\mathit \chi}_{{2}}}$ Charmonium States Formed in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations
 BAGLIN 1986B
PL B172 455 Formation of the ${{\mathit \chi}_{{1}}}$ and ${{\mathit \chi}_{{2}}}$ Charmonium Resonances in Antiproton Proton Annihilation and Measurement of their Masses and Total Width
 GAISER 1986
PR D34 711 Charmonium Spectroscopy from Inclusive ${{\mathit \psi}^{\,'}}$ and ${{\mathit J / \psi}}$ Radiative Decays
see fit info