## Physics Department Faculty Publication Series

1995

#### Journal or Book Title

High Energy Physics

#### 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.

This is the pre-published version which is collected from arXiv.

1067

1-2

#### Book Series Title

Proceedings of the XXVII International Conference

COinS