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${{\mathit \chi}_{{c1}}{(1P)}}$ WIDTH

INSPIRE   PDGID:

M055W

VALUE (MeV) CL% EVTS DOCUMENT ID TECN  COMMENT $\bf{ 0.84 \pm0.04}$ OUR FIT $\bf{ 0.88 \pm0.05}$ OUR AVERAGE $1.39$ ${}^{+0.40}_{-0.38}$ ${}^{+0.26}_{-0.77}$ ABLIKIM 2005 G BES2 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{c1}}}$ $0.876$ $\pm0.045$ $\pm0.026$ ANDREOTTI 2005 A E835 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ $0.87$ $\pm0.11$ $\pm0.08$ 513 1 ARMSTRONG 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 BAGLIN 1986 B SPEC ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ X $<3.8$ 90 GAISER 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 Also PRL 68 1468 Precision Measurements of Charmonium States Formed in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation 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