Direct CP Violation in Nonleptonic Kaon Decays by an Effective Chiral Lagrangian Approach at O(p^6)

Bel'kov, A. A.; Bohm, G.; Lanyov, A. V.; Moshkin, A. A.

Direct CP Violation in Nonleptonic Kaon Decays by an Effective Chiral Lagrangian Approach at O(p^6)

Authors

Description

A self-consistent analysis of K->2pi and K->3pi decays within a unique framework of chiral dynamics applied to the QCD-corrected weak nonleptonic quark lagrangian has been performed. The results on K->2pi amplitudes at O(p^6), including the value for epsilon'/epsilon, are compared with the experiment to fix phenomenological B-factors for mesonic matrix elements of nonpenguin and penguin four-quark operators. The dependence of B-factors on different theoretical uncertainties and experimental errors of various input parameters is investigated. Finally, we present our estimates at O(p^6) for the CP-asymmetry of linear slope parameters in the K(+-)->3pi Dalitz plot.
8 pages, 4 figures, Talk at XV Int. Seminar on High Energy Physics Problems "Relativistic Nuclear Physics & Quantum Chromodynamics", Dubna, September 25-29, 2000