2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/173359It is shown that amplitude-based, exact resummation tames the un-cancelled IR divergences at O(alpha_s^2) in initial state radiation in QCD with massive quarks. Implications for precision predictions for LHC physics are discussed.12 pages, 2 figures; corrected misprint; added material to clarify textHigh Energy Physics - Phenomenologytext