Calculation of a weak nonleptonic matrix element using ``Weinberg'' sum rules

Abstract

There is a ``toy'' weak matrix element which can be expressed as an integral over the vector and axial vector spectral functions, ${\rho }_V(s)-{\rho }_A(s)$. I review our recent evaluation of these spectral functions, the study of four ``Weinberg'' sum rules and the calculation of this matrix element.

Talk presented at the XXVIII International Conference on High Energy Physics, ICHEP94, Glasgow, Aug. 1994.] 5 pages, no figures, Latex, UMHEP-412