Extension of ``Analysis of O(p^{2}) corrections to <ππ\Q_{7,8}\K>''
Abstract
We extend in several respects our earlier work on O(p^{2}) corrections to the matrix elements of the electroweak penguin operator O_{ewp}. First, to facilitate comparison with certain lattice studies we calculate O(p^{2}) corrections to <π\O_{ewp}\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}\O_{ewp}\K> is simply a consequence of how the leading order chiral amplitude is defined. Finally, we address an aspect of the ∊'/∊ problem by estimating O(p^{2}) corrections to recent determinations of <(ππ)_{I=2}\Q_{7,8}\K> which were carried out in the chiral limit.
 Publication:

Physical Review D
 Pub Date:
 March 2002
 DOI:
 10.1103/PhysRevD.65.054014
 arXiv:
 arXiv:hepph/0109268
 Bibcode:
 2002PhRvD..65e4014C
 Keywords:

 12.39.Fe;
 12.38.Gc;
 Chiral Lagrangians;
 Lattice QCD calculations;
 High Energy Physics  Phenomenology
 EPrint:
 revised handling of errors, 26 pages, 9 figures