#### ${\mathit m}_{{{\mathit \Sigma}^{-}}}–{\mathit m}_{{{\mathit \Sigma}^{+}}}$

VALUE (MeV) EVTS DOCUMENT ID TECN
 $\bf{ 8.08 \pm0.08}$ OUR FIT  Error includes scale factor of 1.9.
 $\bf{ 8.09 \pm0.16}$ OUR AVERAGE
$7.91$ $\pm0.23$ 86
 1972
EMUL
$8.25$ $\pm0.25$ 2500
 1965
HBC
$8.25$ $\pm0.40$ 87
 1963
EMUL
References:
 BOHM 1972
NP B48 1 Determination of the Masses of the Charged ${{\mathit \Sigma}}$ Hyperons
 Also
IIHE-73.2 Nov A Determination of the Masses of the Charged ${{\mathit \Sigma}}$ Hyperons $−$ a Reevaluation
 DOSCH 1965
PL 14 239 The Mass Difference of the ${{\mathit \Sigma}}$ Hyperons
 Also
PR 151 1081 ${{\mathit \Sigma}^{\pm}}$ Lifetime and the Branching Ratio Br(${{\mathit \Sigma}^{+}}$) = ( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit n}}$ )/( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ )
 BARKAS 1963
PRL 11 26 Resolution of the ${{\mathit \Sigma}^{-}}$-Mass Anomaly
 Also
Thesis UCRL 9450 Charged ${{\mathit \Sigma}}$-Hyperon Production and Decay: Energetics, Lifetimes, and Branching Ratios