Electromagnetic corrections to K ->pi pi. II. Dispersive matching

Authors

V Cirigliano
JF Donoghue, University of Massachusetts - AmherstFollow
Eugene Golowich, University of Massachusetts - AmherstFollow

Publication Date

2000

Journal or Book Title

PHYSICAL REVIEW D

Abstract

We express the leading electromagnetic corrections in K → ππ as integrals over the virtual photon squared-momentum Q2. The high Q2 behavior is obtained via the operator product expansion. The low Q2 behavior is calculated using chiral perturbation theory. We model the intermediate Q2 region using resonance contributions in order to enforce the matching of these two regimes. Our results confirm our previous estimates that the electromagnetic corrections provide a reasonably small shift in the
I = 3/2 amplitude.

Comments

This is a pre-published version which is collected from arXiv. The published version is at http://prd.aps.org/abstract/PRD/v61/i9/e093002

Pages

-

Volume

61

Issue

9

Recommended Citation

Cirigliano, V; Donoghue, JF; and Golowich, Eugene, "Electromagnetic corrections to K ->pi pi. II. Dispersive matching" (2000). PHYSICAL REVIEW D. 117.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/117