CHIRAL SYMMETRY AND THE PENGUIN INTERACTION

Publication Date

1984

Journal or Book Title

PHYSICAL REVIEW D

Abstract

It is shown how the "penguin" interaction, proposed by Shifman, Vainshtein, and Zakharov in the theory of nonleptonic weak decays, is consistent with the constraints of chiral symmetry. For the K-π transition this involves including a diagram which was missed in previous work. The formulas for the K→2π matrix elements are found to be a factor of 2 larger than the original estimates using the vacuum-saturation method. In addition the equivalence of a procedure using a normal-ordered operator and the more standard technique is demonstrated.

Comments

Published version is located at http://prd.aps.org/abstract/PRD/v30/i7/p1499_1

Pages

1499-1504

Volume

30

Issue

7

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