Employing Helicity Amplitudes for Resummation in SCET

Abstract

Helicity amplitudes are the fundamental ingredients of many QCD calculations for multi-leg processes. We describe how these can seamlessly be combined with resummation in Soft-Collinear Effective Theory (SCET), by constructing a helicity operator basis for which the Wilson coefficients are directly given in terms of color-ordered helicity amplitudes. This basis is crossing symmetric and has simple transformation properties under discrete symmetries.

Comments: 4 pages, 1 figures, to appear in the proceedings of the 51st Rencontres de Moriond (QCD and High Energy Interactions)