A new precision measurement of the Xi(0) mass has been performed at the NA48 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 have 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).
Precision measurement of the Xi(0) mass and the branching ratios of the decays Xi(0) -> Lambda gamma and Xi(0) -> Sigma(0)gamma
MENICHETTI, Ezio;
2000-01-01
Abstract
A new precision measurement of the Xi(0) mass has been performed at the NA48 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 have 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).
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