Observation of the Decay K+ --> pi+ mu+ mu-
High Energy Physics - Experiment
2008-11-26 v2
Abstract
We have observed the rare decay K+ --> pi+ mu+ mu- and measured the branching ratio Gamma(K+ --> pi+ mu+ mu-)/Gamma(K+ --> all) = (5.0 +/- 0.4 (stat.) +/- 0.7 (sys.) +/- 0.6 (theor.)) x 10^{-8}. We compare this result with predictions from chiral perturbation theory and estimates based on the decay K+ --> pi+ e+ e-.
Cite
@article{arxiv.hep-ex/9708012,
title = {Observation of the Decay K+ --> pi+ mu+ mu-},
author = {E787 Collaboration and S. Adler and M. S. Atiya and I-H. Chiang and J. S. Frank and J. S. Haggerty and T. F. Kycia and K. K. Li and L. S. Littenberg and A. Sambamurti and A. Stevens and R. C. Strand and C. Witzig and W. C. Louis and D. S. Akerib and M. Ardebili and M. R. Convery and M. M. Ito and D. R. Marlow and R. A. McPherson and P. D. Meyers and M. A. Selen and F. C. Shoemaker and A. J. S. Smith and E. W. Blackmore and D. A. Bryman and L. Felawka and A. Konaka and Y. Kuno and J. A. Macdonald and T. Numao and P. Padley and J-M. Poutissou and R. Poutissou and J. Roy and A. S. Turcot and P. Kitching and T. Nakano and M. Rozon and R. Soluk},
journal= {arXiv preprint arXiv:hep-ex/9708012},
year = {2008}
}
Comments
9 pages, LaTeX, 2 Postscript figures. Version to be published in PRL