V. Fanti et al., Precision measurement of the Xi(0) mass and the branching ratios of the decays Xi(0) -> Lambda gamma and Xi(0) -> Sigma(0)gamma, EUR PHY J C, 12(1), 2000, pp. 69-76
A new precision measurement of the Xi(0) mass has been performed at the NA4
8 experiment at the CERN SPS. The value obtained is [1319.82+/-0.06 (stat.)
+/-0.2 (syst.)] MeV/c(2). The branching ratios of Xi(0) radiative decays h
ave been measured as: Br(Xi --> Lambda gamma) = [1.90 +/- 0.34(stat.) +/- 0
.19(syst.)].10(-3) and Br(Xi --> Sigma(0)gamma) = [3.14 +/- 0.76(stat.) +/-
0.32(syst.).10(-3).