Search for the Decay $K_L\to {\pi }^0{\mu }^{+}{\mu }^{-}$

Abstract

We report on a search for the decay \klpimumu 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 CKM 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 \BR{\klpimumu} $<3.8\times 10^{-10}$ at the 90% confidence level.

See also "Observation of the Decay $K_L\to {\mu }^{+}{\mu }^{-}\gamma \gamma$", also by the KTeV collaboration

References in corpus (1)

• Search for the Decay K_L -> pi^0 nu nubar using pi^0 -> e^+ e^- gamma

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