Search for \(K^+\rightarrow \pi ^+\nu \overline{\nu }\): First NA62 Results
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Abstract
NA62 has searched for the \(K^+\rightarrow \pi ^+\nu \overline{\nu }\) decay using a new kaon decay in-flight technique. One candidate event, compatible with the Standard Model prediction, has been observed from a sample of \(1.2\times 10^{11}\) decays. Assuming that the event is background, an upper limit of \(1.4\times 10^{-9}\) (95% CL) has been placed. Prospects for further improvements of the measurement are given.
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