Help with 2-loop lightcone coordinate integral

[jp-grewal]

Hi,

While I can compute usual one-loop integrals using Feyncalc, I am not sure how to the 1-loop ones involving Wilson lines (along lightcones a la SCET) using FC and just do them by hand. But for a project I now need to do 2-loop integrals involving eikonal propagators and Dirac structures containing lightcone vectors etc.

I was wondering if there is any way of computing such 2-loop lightcone integrals using FC? For e.g.

Would be grateful for any help!

[vsht]

The propagators can be entered using SFAD, then you go the usual route of topology identification, tensor reduction and IBPs. The master integrals obviously have to be calculated by hand unless they are already known in the literature.