The value of BK from the experimental data on CP-violation in K-mesons and up-to-date values of CKM matrix parameters
Abstract
The difference between induced by box diagram quantity ε and experimentally measured value of ε is determined and used to obtain the value of ε with high precision. Present day knowledge of CKM matrix elements (including B-factory data), allows us to obtain from the Standard Model expression for ε the value of parameter BK: BK = 0.89 0.16. It turns out to be very close to the result of vacuum insertion, BK = 1.
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