Observation of the decay Ξ0→Σ+μ-ν̄μ

E. Abouzaid, T. Alexopoulos, M. Arenton, R. F. Barbosa, A. R. Barker, L. Bellantoni, A. Bellavance, E. Blucher, G. J. Bock, E. Cheu, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, C. O. Escobar, A. Glazov, A. Golossanov, R. A. Gomes, P. Gouffon, K. HanagakiY. B. Hsiung, H. Huang, D. A. Jensen, R. Kessler, K. Kotera, J. Ladue, A. Ledovskoy, P. L. McBride, E. Monnier, K. S. Nelson, H. Nguyen, R. Niclasen, H. Ping, V. Prasad, X. R. Qi, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, J. Shields, W. Slater, D. Smith, N. Solomey, E. C. Swallow, P. A. Toale, R. Tschirhart, C. Velissaris, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. Wilking, B. Winstein, R. Winston, E. T. Worcester, M. Worcester, T. Yamanaka, E. D. Zimmerman, R. F. Zukanovich

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The Ξ0 muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the Ξ0 beta decay mode and yields a value for the ratio of decay rates Γ(Ξ0→Σ+μ-ν̄μ)/ Γ(Ξ0→Σ+e-ν̄e) of [1.8-0.5+0.7(stat)±0.2(syst) ]×10-2. This is in agreement with the SU(3) flavor symmetric quark model.

Original languageEnglish (US)
Article number081801
JournalPhysical review letters
Issue number8
StatePublished - Aug 19 2005

ASJC Scopus subject areas

  • General Physics and Astronomy


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