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Rare Kaon Decay From E949 At BNL: K^+ -->pi^+ nunubar

Shaomin Chen
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Abstract

In the first year of physics run, the E949 experiment at Brookhaven National Laboratory has already collected $1.8\times 10^{12}$ kaons stopping in the target. Additional evidence for the rare charged kaon decay $K^+\toπ^+ν\barν$ has been observed. Combined with previous results from the E787 experiment, the branching ratio is measured to be Br($K^+\toπ^+ν\barν$)=$(1.47^{+1.30}_{-0.89})\times10^{-10}$.

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Shaomin Chen. 2004-10-05. Rare Kaon Decay From E949 At BNL: K^+ -->pi^+ nunubar. https://doi.org/10.1142/9789812702227_0156

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