On-shell Recursion Relations for n-point QCD

Abstract

We present on the use of on-shell recursion relations. These can be used not only for calculating tree amplitudes, including those with masses, but also to compute analytically the missing rational terms of one-loop QCD amplitudes. Combined with the cut-containing pieces calculated using a unitarity approach complete one-loop QCD amplitudes can be derived. This approach is discussed in the context of the adjacent 2-minus all-multiplicity QCD gluon amplitude.

Comments: Talk presented at the 7th Workshop On Continuous Advances In QCD, 11-14 May 2006, Minneapolis, Minnesota