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

INSPIRE search
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
BOHM
1972
EMUL
$8.25$ $\pm0.25$ 2500
DOSCH
1965
HBC
$8.25$ $\pm0.40$ 87
BARKAS
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