Limit on the branching ratio of KL→π0μ+μ-

D. A. Harris, R. A. Briere, E. Cheu, G. Makoff, K. S. McFarland, A. Roodman, B. Schwingenheuer, S. V. Somalwar, Y. W. Wah, B. Winstein, R. Winston, K. Arisaka, D. Roberts, W. Slater, M. Weaver, A. R. Barker, E. C. Swallow, G. J. Bock, R. Coleman, M. CrislerJ. Enagonio, R. Ford, Y. B. Hsiung, D. A. Jensen, E. Ramberg, R. Tschirhart, E. M. Collins, G. D. Gollin, T. Nakaya, T. Yamanaka, P. Gu, P. Haas, W. P. Hogan, S. K. Kim, J. N. Matthews, S. S. Myung, S. Schnetzer, G. B. Thomson, Y. Zou

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We report the results of a search for the decay KL→π0μ+μ- conducted by E799 at Fermilab. This decay mode is expected to have significant CP-violating contributions and a direct measurement could either confirm the standard model mechanisms for CP-violation or point to physics beyond the standard model. No such events were seen. The 90% confidence level upper limit is determined to be B(KL→π0μ+μ-)<5.1×10-9.

Original languageEnglish (US)
Pages (from-to)3914-3917
Number of pages4
JournalPhysical review letters
Issue number24
StatePublished - 1993

ASJC Scopus subject areas

  • General Physics and Astronomy


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