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${\mathit m}_{{{\mathit \Sigma}^{0}}}–{\mathit m}_{{{\mathit \Lambda}}}$

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S021DL

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 76.959 \pm0.023}$ OUR FIT $76.966$ $\pm0.020$ $\pm0.013$ 3327 WANG 1997 SPEC ${{\mathit \Sigma}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \gamma}}$ $\rightarrow$ ( ${{\mathit p}}{{\mathit \pi}^{-}}$) ( ${{\mathit e}^{+}}{{\mathit e}^{-}}$) • • We do not use the following data for averages, fits, limits, etc. • • $76.23$ $\pm0.55$ 109 COLAS 1975 HLBC ${{\mathit \Sigma}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \gamma}}$ $76.63$ $\pm0.28$ 208 SCHMIDT 1965 HBC See note with ${{\mathit \Lambda}}$ mass

References:

WANG 1997 PR D56 2544 A Precise Measurement of the ${{\mathit \Sigma}^{0}}$ Mass COLAS 1975 NP B91 253 Search for Electromagnetic Decays of Neutral Hyperons in the $1210 - 1500$ MeV Mass Range and of Neutral Mesons in the $150 - 600$ MeV Mass Range SCHMIDT 1965 PR 140 B1328 Precise Hyperon Masses