Extension of “Analysis of O(p2) corrections to 〈ππ|Q7,8|K〉”

Authors

V Cirigliano
E GolowichFollow

Publication Date

2002

Journal or Book Title

PHYSICAL REVIEW D

Abstract

We extend in several respects our earlier work on O(p2) corrections to the matrix elements of the electroweak penguin operator Oewp. First, to facilitate comparison with certain lattice studies we calculate O(p2) corrections to 〈π|Oewp|K〉 in the SU(3) limit of equal light quark masses. Next, we demonstrate how an apparent disagreement in the literature regarding whether higher order chiral contributions increase or decrease 〈(ππ)I=2|Oewp|K〉 is simply a consequence of how the leading order chiral amplitude is defined. Finally, we address an aspect of the ε′/ε problem by estimating O(p2) corrections to recent determinations of 〈(ππ)I=2|Q7,8|K〉 which were carried out in the chiral limit.

Comments

The published version is located at http://prd.aps.org/abstract/PRD/v65/i5/e054014

Pages

-

Volume

65

Issue

5

Recommended Citation

Cirigliano, V and Golowich, E, "Extension of “Analysis of O(p2) corrections to 〈ππ|Q7,8|K〉”" (2002). PHYSICAL REVIEW D. 463.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/463