Nonleptonic decays of K mesons revisited

B. Blok, M. Shifman

Research output: Contribution to journalArticlepeer-review


We estimate nonfactorizable 1 Nc contributions in the K→2π amplitudes using the approach proposed in our previous work. It is demonstrated that for the conventional (nonpenguin) operators these contributions are close in magnitude to factorizable 1 Nc parts and have the opposite sign. Thus, an approximate rule of discarding 1 Nc corrections in K→2πdecays is theoretically confirmed. As a result we find an extra suppression of the matrix element of 04 (δI = 3 2) and an extra enhancment of the matrix element of O1 (δI = 1 2). The parameter B describing K0-K0 mixing is also discussed.

Original languageEnglish (US)
Pages (from-to)417-424
Number of pages8
JournalPhysics Letters B
Issue number3-4
StatePublished - Nov 19 1992


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