On gauge amplitudes first appearing at two loops

LJ Dixon, A Morales - Journal of High Energy Physics, 2024 - Springer
A bstract We study scattering amplitudes in massless non-abelian gauge theory where all
outgoing gluons have positive helicity. It has been argued recently by Costello that for a …

QED as a many-body theory of worldlines. II. All-order -matrix formalism

X Feal, A Tarasov, R Venugopalan - Physical Review D, 2023 - APS
In, we developed a first-quantized worldline formalism for all-order computations of
amplitudes in QED. In particular, we demonstrated in this framework an all-order proof of the …