Related Experiment Video
Updated: Jul 4, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for lepton-flavor-violating decays of the neutral kaon
E Abouzaid1, M Arenton, A R Barker
1The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA.
Abstract:
The Fermilab KTeV experiment has searched for lepton-flavor-violating decays of the K(L) 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(K(L) --> pi(0) micro(+/-) e(-/+)) <7.6 x 10(-11); BR(K(L) --> pi(0)pi(0) micro(+/-) e(-/+)) <1.7 x 10(-10); BR(pi(0) --> micro(+/-) e(-/+)) <3.6 x 10(-10). This result represents a factor of 82 improvement in the branching ratio limit for K(L) --> pi(0) micro(+/-) e(-/+) and is the first reported limit for K(L) --> pi(0)pi(0) micro(+/-) e(-/+).
Related Concept Videos
Types of Radioactivity
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
Nuclear Stability
To hold positively charged protons together in the...
Nuclear Transmutation
Atomic Nuclei: Larmor Precession Frequency
Subatomic Particles
Atomic Nuclei: Nuclear Spin State Overview

