2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203826Cachazo-Svrcek-Witten-type Feynman rules for massive matter scalar legs and pure glue loops are presented, obtained by deriving them directly from the space-time action. We comment on the derivation and some sample applications, in particular to calculating one loop effects in pure Yang-Mills theory. Furthermore, we derive CSW rules for effective Higgs-gluon couplings studied in the literature. In addition, it is shown how twistor techniques for deriving canonical field transformations explored for massless scalars extend to massless fermions.6 pages, to appear in the proceedings of the international conference on Loops and Legs in Quantum Field Theory, Sondershausen, 20-25 April 2008High Energy Physics - TheoryHigh Energy Physics - Phenomenologytext