MHV One-Loop Amplitudes in Yang-Mills from Generalised Unitarity

Abstract

In this letter, we exploit generalised unitarity in order to calculate the cut-constructible part of one-loop amplitudes in non-supersymmetric Yang-Mills theory. In particular, we rederive the n-gluon MHV amplitudes for both the adjacent and non-adjacent gluon helicity configurations from 3- and 4-particle cuts alone.

Comments: 20 pages, 4 figures; v3 version published in JHEP