Observation of the Decay Ξ0→Σ+e-νe

KTeV Collaboration

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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 Ξ0→ Λ0π0 decays yields a branching ratio of Γ(Ξ0→Σ+ e-νe)/Γ total =(2.71 ± 0.22statistical ± 0.31 systematic) × 10-4. The flavor symmetric quark model calculation agrees with this result.

Original languageEnglish (US)
Pages (from-to)3751-3754
Number of pages4
JournalPhysical review letters
Issue number19
StatePublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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