2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53708We discuss new results in QCD obtained with string-based methods. These methods were originally derived from superstring theory and are significantly more efficient than conventional Feynman rules. This technology was a key ingredient in the first calculation of the one-loop five-gluon amplitude. We also present a conjecture for a particular one-loop helicity amplitude with an arbitrary number of external gluons.talk presented by Z.B. at Strings 1993, May 24-29, Berkeley CA, 16 pagesHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext