Color Dressed Unitarity and Recursion for Yang-Mills Two-Loop All-Plus Amplitudes

Abstract

We present a direct computation of the full color two-loop five-point all-plus Yang-Mills amplitude using four dimensional unitarity and recursion. We present the $SU(N_c)$ amplitudes in compact analytic forms. Our results match the explicit expressions previously computed but do not require full two-loop integral methods.

Comments: 23 pages, 5 figures; version 2: corrected eq 6.21