An $n$-point QCD two-loop amplitude

Abstract

We present an explicit expression for a particular $n$-gluon two loop scattering partial amplitude. Specifically we present an analytic form for the single trace $N_c$ independent colour partial amplitude for the case where all external gluons have positive helicity.

Comments: v3 : clarification of eq 7.2, citations updated. arXiv admin note: text overlap with arXiv:1911.06547