Search for the Decay $K_{L} \to π^{0} μ^{+} μ^{-}$

Publisher Website

5 June 2000

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 84 (23) , 5279-5282
https://doi.org/10.1103/physrevlett.84.5279

Abstract

We report on a search for the decay

K_{L} \to π^{0} μ^{+} μ^{-}

carried out as a part of the KTeV experiment at Fermilab. This decay is expected to have a significant

CP

violating contribution and a direct measurement will either support the Cabibbo-Kobayashi-Maskawa mechanism for

CP

violation or point to new physics. Two events were observed in the 1997 data with an expected background of

0.87 \pm 0.15

events, and we set an upper limit

B (K_{L} \to π^{0} μ^{+} μ^{-}) < 3.8 \times 10^{- 10}

at the

90 %

confidence level.

Keywords

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Version 1, 2000-01-04, ArXiv

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