1997/08/31 by S. S. Adler, E787 Collaboration, S. Adler +46 · 1 citation
Physics and Astronomy · #Algorithm #Black Holes and Theoretical Physics #Computer science #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.79.4756
published as Phys.Rev.Lett.79:4756-4759,1997 · 9 pages, LaTeX, 2 Postscript figures. Version to be published in PRL
arxiv created 1997/10/19 · openalex publication_date 1997/12/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have observed the rare decay K+\ensuremath→\ensuremathπ+\ensuremathμ+\ensuremathμ^\ensuremath- and measured the branching ratio \ensuremathγ(K+\ensuremath→\ensuremathπ+\ensuremathμ+\ensuremathμ^\ensuremath-)/\ensuremathγ(K+\ensuremath→all)\phantom\rule0ex0ex=\phantom\rule0ex0ex[5.0\ifmmode±\else\textpm\fi0.4(stat)\ifmmode±\else\textpm\fi0.7(syst)\ifmmode±\else\textpm\fi0.6(th)]\ifmmode×\else\texttimes\fi10^\ensuremath-8. We compare this result with predictions from chiral perturbation theory and estimates based on the decay K+\ensuremath→\ensuremathπ+e+e^\ensuremath-.