title: Graviton and Gluon Scattering from First Principles.
abstract: Graviton and gluon scattering are studied from minimal physical assumptions such as Poincare and gauge symmetry as well as unitarity. The assumptions lead to an interesting and surprisingly restrictive set of linear equations. This shows gluon and graviton scattering to be related in many field and string theories, explaining and extending several known results. By systematic analysis exceptional graviton scattering amplitudes are derived, which in general dimensions cannot be related to gluon amplitudes. The simplicity of the formalism guarantees wide further applicability to gauge and gravity theories.
authors.affiliation: II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany.
authors.forename: Rutger H
authors.initials: RH
authors.lastname: Boels
authors.affiliation: Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, 05508-090 São Paulo-SP, Brazil‡ and Instituto de Matemática e Computação, Universidade Federal de Itajubá, Avenida BPS 1303, 37500-903, Itajubá-MG, Brazil§.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Medina