Quadratic Mass Corrections of Order ${\alpha }_s^3{m}_q^2/s$ to the Decay Rate of Z- and W- Bosons

Abstract

We analytically compute quadratic mass corrections of order ${\alpha }_s^3{m}_q^2/s$ to the absorptive part of the (non-diagonal) correlator of two axial vector currents. This allows us to find the correction of order ${\alpha }_s^3{m}_q^2/M_W^2$ to the $\Gamma (W-->hadrons)$ as well as similar corrections to $\Gamma (Z-->hadrons)$.

Comments: 9 pages, LaTeX, no figures