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Updated: Jul 12, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
Improved limit on the rate of the decay K+ --> pi(+)&mgr;(+)e(-)
1Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 and Physics Department, Yale University, New Haven, Connecticut 06511, USA.
Abstract:
We report results of a search for the lepton-family number violating decay K+-->pi(+)&mgr;(+)e(-) from data collected by experiment E865 in 1996 at the Alternating Gradient Synchroton of Brookhaven National Laboratory. We place an upper limit on the branching ratio at 3.9x10(-11) ( 90% C.L.). Together with results based on data collected in 1995 and an earlier experiment, E777, this result establishes a combined 90% confidence level upper limit on the branching ratio at 2.8x10(-11). We also report a new upper limit on the branching ratio for pi(0)-->&mgr;(+)e(-) of 3.8x10(-10) ( 90% C. L.).
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