Observation of the Decay Ξ0Σ+eν¯e

A. Affolder et al. (KTeV Collaboration)
Phys. Rev. Lett. 82, 3751 – Published 10 May 1999
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Abstract

We present the first observation of Ξ0 beta decay, using the KTeV beam line and detector at Fermilab. We have identified 176 beta decay events after subtracting a 7 event background. Normalization to 41 024 simultaneously collected Ξ0Λ0π0 decays yields a branching ratio of Γ(Ξ0Σ+eν¯e)/Γtotal=(2.71±0.22statistical±0.31systematic)×104. The flavor symmetric quark model calculation agrees with this result.

  • Received 23 December 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.3751

©1999 American Physical Society

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Vol. 82, Iss. 19 — 10 May 1999

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