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QCD Calculation ofK⁰ - [`(K)]⁰K^0 - \bar K^0 mixing from three-point function sum rules

Authors:	N Bili&#; C A Dominguez and B Guberina

Institution:	(1) Rudjer Boŝković Institute, YU-41000 Zagreb, Croatia, Yugoslavia;(2) Deutsches Elektronen-Synchrotron DESY, D-2000 Hamburg, Federal Republic of Germany;(3) Sektion Physik, Universit?t München, D-8000 München, Federal Republic of Germany;(4) Present address: Facultad de Física, Pontificia Universidad Católica de Chile, Santiago, Chile;(5) Present address: Theory group DESY, D-2000 Hamburg, FRG

Abstract:	We calculate theB parameter for $K^0 - \bar K^0$ mixing in the framework of QCD sum rules for a three-point function involving pseudoscalar currents, and contrast our results with other calculations. We findB=0.5±0.1±0.2, where the first error reflects uncertainties in the various QCD parameters and the second one is an estimate of uncalculated three-loop radiative and higher order quark mass corrections.

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