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.
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Blanco, E., van Hameren, A., Kotko, P. et al. All-plus helicity off-shell gauge invariant multigluon amplitudes at one loop. J. High Energ. Phys. 2020, 158 (2020). https://doi.org/10.1007/JHEP12(2020)158
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DOI: https://doi.org/10.1007/JHEP12(2020)158