Addendum to: Four-loop cusp anomalous dimension in QED

Andrey Grozin
2019 Journal of High Energy Physics  
The cusp anomalous dimension Γ(ϕ, α s ) at Euclidean angles ϕ = π − δ, δ → 0 is closely related to the quark-antiquark potential V ( q, α s ) [1]. Let's define 1
doi:10.1007/jhep01(2019)134 fatcat:emzcob46tvam5kkbadcls3xyou