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 journalArticle

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 - Jan 1 1993


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Harris, D. A., Briere, R. A., Cheu, E., Makoff, G., McFarland, K. S., Roodman, A., Schwingenheuer, B., Somalwar, S. V., Wah, Y. W., Winstein, B., Winston, R., Arisaka, K., Roberts, D., Slater, W., Weaver, M., Barker, A. R., Swallow, E. C., Bock, G. J., Coleman, R., ... Zou, Y. (1993). Limit on the branching ratio of KL→π0μ+μ-. Physical review letters, 71(24), 3914-3917.