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Matching the Electroweak Penquins Q7 and Q8

Elvira Gamiz, Joaquim Prades, Johan Bijnens

hep-pharXiv:hep-ph/0209089

Abstract

We report on recent advances on the computation of the matrix elements of the electroweak penguins Q7 and Q8 which are relevant for the Delta I=3/2 contribution to epsilon'K in the chiral limit. The matching of scale and scheme dependences between Wilson coefficients and these matrix elements is done analytically at NLO in alphaS.

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