Search for lepton-flavor-violating decays of the neutral kaon

E. Abouzaid, M. Arenton, 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, Y. B. Hsiung, D. A. Jensen, R. KesslerK. Kotera, A. Ledovskoy, P. L. McBride, E. Monnier, H. Nguyen, R. Niclasen, D. G.Phillips Ii, H. Ping, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, W. Slater, D. Smith, N. Solomey, E. C. Swallow, P. A. Toale, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. J. Wilking, B. Winstein, R. Winston, C. Wolfe, E. T. Worcester, M. Worcester, T. Yamanaka, E. D. Zimmerman, R. F. Zukanovich

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


The Fermilab KTeV experiment has searched for lepton-flavor-violating decays of the KL meson in three decay modes. We observe no events in the signal region for any of the modes studied, and we set the following upper limits for their branching ratios at the 90% C.L.: BR(KL ϱeâ) <7.6Ã-10-11; BR(KL Ï0ϱeâ)<1.7Ã- 10-10; BR(Ï0 Π±eâ)<3.6Ã-10-10. This result represents a factor of 82 improvement in the branching ratio limit for KL ϱeâ and is the first reported limit for KL Ï0ϱeâ.

Original languageEnglish (US)
Article number131803
JournalPhysical review letters
Issue number13
StatePublished - Apr 4 2008
Externally publishedYes


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