Nonleptonic decays of K mesons revisited

B. Blok; M. Shifman

doi:10.1016/0370-2693(92)91543-I

Nonleptonic decays of K mesons revisited

B. Blok, M. Shifman

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

Abstract

We estimate nonfactorizable 1 N_c 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 N_c parts and have the opposite sign. Thus, an approximate rule of discarding 1 N_c 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 language	English (US)
Pages (from-to)	417-424
Number of pages	8
Journal	Physics Letters B
Volume	294
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(92)91543-I
State	Published - Nov 19 1992

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title = "Nonleptonic decays of K mesons revisited",

abstract = "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.",

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AU - Shifman, M.

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N2 - 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.

AB - 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.

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Nonleptonic decays of K mesons revisited

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