#### ${\mathit m}_{{{\mathit \Xi}^{-}}}–{\mathit m}_{{{\mathit \Xi}^{0}}}$

The fit uses the ${{\mathit \Xi}^{0}}$ , ${{\mathit \Xi}^{-}}$ , and ${{\overline{\mathit \Xi}}^{+}}$ masses and the ${{\mathit \Xi}^{-}}$ $−{{\mathit \Xi}^{0}}$ mass difference. It assumes that the ${{\mathit \Xi}^{-}}$ and ${{\overline{\mathit \Xi}}^{+}}$ masses are the same.
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 6.85 \pm0.21}$ OUR FIT
 $\bf{ 6.3 \pm0.7}$ OUR AVERAGE
$6.9$ $\pm2.2$ 29
 1966
HBC
$6.1$ $\pm0.9$ 88
 1965 B
HBC
$6.8$ $\pm1.6$ 23
 1963
FBC
• • We do not use the following data for averages, fits, limits, etc. • •
$6.1$ $\pm1.6$ 45
 1964 B
HBC See PJERROU 1965B
References:
 LONDON 1966
PR 143 1034 ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interaction at 2.24 BeV
 PJERROU 1965B
PRL 14 275 Electromagnetic ${{\mathit \Xi}^{*}{(1530)}}$ Mass Difference
 Also
Thesis Properties of ${}^{\text{-}}$ and ${}^{0}$ Hyperons
 CARMONY 1964B
PRL 12 482 Properties of ${{\mathit \Xi}}$ Hyperons
 JAUNEAU 1963
PL 4 49 Direct Measurement of ${{\mathit \Xi}^{-}}$ and ${{\mathit \Xi}^{0}}$ Mean Lives
 Also
Siena Conf. 1 1 Siena Conf. 1963