Antenna Factorization of Gauge-Theory Amplitudes

Abstract

I derive a single factorization formula which summarizes all soft and collinear divergences of a tree-level gauge theory amplitude. The singular factor squared is in a certain sense the generalization of the Catani-Seymour dipole factorization formula.

Comments: 13 pages; two equations corrected, one omitted, clarifying comments added, final Phys. Rev. version