How to work with PaxDiLog

[MeissnerAndre]

Dear FeynCalc community,

I currently have to use the C0 function which gives me a DiLog term. This then becomes troublesome as I have to use renormalization around p^2=0. This becomes somewhat hard with the DiLogs, even if I rewrite them in terms of DiLog[2,x] and expand in the epsilon part, as Mathematica has trouble approaching the p^2->0 limit. I wondered if someone had similar issues.

Thanks in advance!

[vsht]

Can't you just do the calculation with $p^2=0$ from the very beginning?

Expanding full results is very troublesome and one usually tries to simplify the integrals for the given kinematics before calculating them, not vice versa.

[MeissnerAndre]

This works for my logarithmic divergencies but not my quadratic ones. Maybe I'm doing something wrong, but I'm not sure if changing the limits from d_p^2 Int to Int d_p^2 in Feynman Integrals always works?

[vsht]

In that case I'd probably do an asymptotic expansion of the master integral around small $p^2$-values.

[MeissnerAndre]

I will try it with that

Thanks!