Quadratic mass corrections of order O(αs3mq2s) to the decay rate of Z- and W-bosons

We analytically compute quadratic mass corrections of order O(αs3mq3s) to the absorptive part of the (non-diagonal) correlator of two axial vector currents. This allows us to find the correction of order O(αs3mq2MW2) to Λ(W → hadrons) as well as similar corrections to Λ(Z → hadrons).