2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205003We compute the virtual O(α_s^3 n_f^2) corrections to the heavy quark vector current correlator in terms of expansions in the external momentum and as an exact numerical solution. As a byproduct, the available high-energy expansion at the three-loop level is extended.12 pages, 5 figuresHigh Energy Physics - Phenomenologytext