Comment on `Analysis of O(p^2) Corrections to <2pi|Q_{7,8}|K>'

Details Comment on `Analysis of O(p^2) Corrections to <2pi|Q_{7,8}|K>' Comment on `Analysis of O(p^2) Corrections to <2pi|Q_{7,8}|K>'

2001-09-27

arxiv.org/abs/hep-ph/0109265v3

Phys.Rev. D65 (2002) 054014

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Reference added and typo corrected

Scientific paper

10.1103/PhysRevD.65.054014

We extend in several respects our earlier work on O(p^2) corrections to matrix elements of the electroweak penguin operator O_{ewp}. First, to facilitate comparison with certain lattice studies we calculate O(p^2) corrections to 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 <2pi_{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 epsilon'/epsilon problem by estimating O(p^2) corrections to recent determinations of <2pi_{I=2}|Q_{7,8}|K> which were carried out in the chiral limit.

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