Paper
All-plus helicity off-shell gauge invariant multigluon amplitudes at one loop
Authors
Etienne Blanco, Andreas van Hameren, Piotr Kotko, Krzysztof Kutak
Abstract
We calculate one loop scattering amplitudes for arbitrary number of positive helicity on-shell gluons and one off-shell gluon treated within the quasi-multi Regge kinematics. The result is fully gauge invariant and possesses the correct on-shell limit. Our method is based on embedding the off-shell process, together with contributions needed to retain gauge invariance, in a bigger fully on-shell process with auxiliary quark or gluon line.