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${{\mathit \Sigma}^{-}}$ MASS

INSPIRE   PDGID:

S020M

The fit uses ${{\mathit \Sigma}^{+}}$, ${{\mathit \Sigma}^{0}}$, ${{\mathit \Sigma}^{-}}$, and ${{\mathit \Lambda}}$ mass and mass-difference measurements.

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1197.449 \pm0.030}$ OUR FIT  Error includes scale factor of 1.2. $\bf{ 1197.45 \pm0.04}$ OUR AVERAGE  Error includes scale factor of 1.2. $1197.417$ $\pm0.040$ GUREV 1993 SPEC ${{\mathit \Sigma}^{-}}{}^{}\mathrm {C}$ atom, crystal diff. $1197.532$ $\pm0.057$ GALL 1988 CNTR ${{\mathit \Sigma}^{-}}{}^{}\mathrm {Pb}$, ${{\mathit \Sigma}^{-}}{}^{}\mathrm {W}$ atoms $1197.43$ $\pm0.08$ 3000 SCHMIDT 1965 HBC See note with ${{\mathit \Lambda}}$ mass • • We do not use the following data for averages, fits, limits, etc. • • $1197.24$ $\pm0.15$ 1 DUGAN 1975 CNTR Exotic atoms 1  GALL 1988 concludes that the DUGAN 1975 mass needs to be reevaluated.

References:

GUREV 1993 JETPL 57 400 First Measurement of Roentgen Radiation of the ${{\mathit \Sigma}^{-}}$ Atoms with the Help of Crystal Diffractional Spectrometer GALL 1988 PRL 60 186 Precision Measurement of ${{\mathit K}^{-}}$ and ${{\mathit \Sigma}^{-}}$ Masses DUGAN 1975 NP A254 396 Mass and Magnetic Moment of ${{\mathit \Sigma}^{-}}$ by the Exotic Atom Method SCHMIDT 1965 PR 140 B1328 Precise Hyperon Masses