title: Two-loop iteration of five-point N=4 super-Yang-Mills amplitudes.
abstract: We confirm by explicit computation the conjectured all-orders iteration of planar maximally supersymmetric N=4 Yang-Mills theory in the nontrivial case of five-point two-loop amplitudes. We compute the required unitarity cuts of the integrand and evaluate the resulting integrals numerically using a Mellin-Barnes representation and the automated package of Czakon [Comput. Phys. Commun. 175, 559 (2006)]. This confirmation of the iteration relation provides further evidence suggesting that N=4 gauge theory is solvable.
authors.affiliation: Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Bern
authors.forename: M
authors.initials: M
authors.lastname: Czakon
authors.forename: D A
authors.initials: DA
authors.lastname: Kosower
authors.forename: R
authors.initials: R
authors.lastname: Roiban
authors.forename: V A
authors.initials: VA
authors.lastname: Smirnov