title: All-orders singular emission in gauge theories.
abstract: I present a class of functions unifying all singular limits for the emission of soft or collinear gluons in gauge-theory amplitudes at any order in perturbation theory. Each function is a generalization of the antenna functions of previous works. The helicity-summed interferences of these functions are thereby also generalizations to higher orders of the Catani-Seymour dipole factorization function.
authors.affiliation: Service de Physique Théorique, Centre d'Etudes de Saclay, F-91191 Gif-sur-Yvette cedex, France. kosower@spht.saclay.cea.fr
authors.forename: David A
authors.initials: DA
authors.lastname: Kosower