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Observation of Direct CP Violation in K_{S,L} to \pi \pi Decays
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We have compared the decay rates of K_L and K_S to \pi^+ \pi^- and \pi^0 \pi^0 final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter Re(\epsilon'/\epsilon) is equal to (28.0 \pm 3.0 (stat) \pm 2.8 (syst)) \times 10^{-4}. This result definitively establishes the existence of CP violation in a decay process.
Forward citations
Cited by 3 Pith papers
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Contributions of interference and non-interference components to CP asymmetries in heavy meson decays
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