New precise measurements of the [Xi] super(0)--> g and [Xi] super(0)-->[sigma] super(0)g decay asymmetries

The decay asymmetries of the weak radiative hyperon decays [Xi] super(0)--> g and [Xi] super(0)-->[sigma] super(0)g have been measured with high precision using data of the NA48/1 experiment at CERN. From about 52 000 [Xi] super(0)--> g and 15 000 [Xi] super(0)-->[sigma] super(0)g decays...

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Bibliographic Details
Published in:Physics letters. B 2010-10, Vol.693 (3), p.241-248
Main Authors: Batley, J R, Kalmus, GE, Lazzeroni, C, Munday, D J, Patel, M, Slater, M W, Wotton, SA, Arcidiacono, R, Bocquet, G, Ceccucci, A, Cundy, D, Doble, N, Falaleev, V, Gatignon, L, Gonidec, A, Grafstroem, P, Kubischta, W, Mikulec, I, Norton, A
Format: Article
Language:English
Subjects:
Accuracy
Asymmetry
CERN
Decay
Elementary particles
Hyperons
Online Access:Get full text
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Summary:The decay asymmetries of the weak radiative hyperon decays [Xi] super(0)--> g and [Xi] super(0)-->[sigma] super(0)g have been measured with high precision using data of the NA48/1 experiment at CERN. From about 52 000 [Xi] super(0)--> g and 15 000 [Xi] super(0)-->[sigma] super(0)g decays, we obtain for the decay asymmetries a sub()[Xi]u0-> g-0.704+/-0.019 sub(stat)+/- 0.064 sub(syst) and a sub()[Xi]u0->[sigma] super(0)g-0.729+/-0.030 sub(s)tat/-0.076 sub(syst), respectively. These results are in good agreement with previous experiments, but more precise.
ISSN:0370-2693
DOI:10.1016/j.physletb.2010.08.046