The decay asymmetries of the weak radiative hyperon decays Xi(0) -> Lambda gamma and Xi(0) -> Sigma(0)gamma have been measured with high precision using data of the NA48/1 experiment at CERN. From about 52 000 Xi(0) -> Lambda gamma and 15 000 Xi(0) -> Sigma(0)gamma decays, we obtain for the decay asymmetries alpha(Xi 0 -> Lambda gamma) = -0.704 +/- 0.019(stat) +/- 0.064(syst) and alpha(Xi 0 -> Sigma 0 gamma) = -0.729 +/- 0.030(stat) +/- 0.076(syst), respectively. These results are in good agreement with previous experiments, but more precise.
New Precise Measurements of the $\xi^0 -> \Lambda \gamma$ and $\xi^0 -> \Sigma^0 \gamma$ Decay Asymmetries
VELTRI, MICHELE;
2010
Abstract
The decay asymmetries of the weak radiative hyperon decays Xi(0) -> Lambda gamma and Xi(0) -> Sigma(0)gamma have been measured with high precision using data of the NA48/1 experiment at CERN. From about 52 000 Xi(0) -> Lambda gamma and 15 000 Xi(0) -> Sigma(0)gamma decays, we obtain for the decay asymmetries alpha(Xi 0 -> Lambda gamma) = -0.704 +/- 0.019(stat) +/- 0.064(syst) and alpha(Xi 0 -> Sigma 0 gamma) = -0.729 +/- 0.030(stat) +/- 0.076(syst), respectively. These results are in good agreement with previous experiments, but more precise.File in questo prodotto:
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