Search for the Decay $K_L \to π^0 μ^+ μ^-$

Details Search for the Decay $K_L \to π^0 μ^+ μ^-$ Search for the Decay $K_L \to π^0 μ^+ μ^-$

2000-01-04

arxiv.org/abs/hep-ex/0001006v1

Phys.Rev.Lett.84:5279-5282,2000

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevLett.84.5279

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.

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