TID with negative i epsilon

[gp4895]

I am trying to perform an integral by rewriting a delta function as

and integrating over p. However TID seems to not be able to work with the negative i epsilon.
Is there a way to perform this integral?

Thanks for your hard work

[vsht]

I don't think that it is feasible/practical to manipulate integrals containing such propagators using FeynCalc.

Formally, you can represent integrals having different i eta signs using SFAD, e.g.
SFAD[{{p, p . q}, {m^2, 1}, 1}] and SFAD[{{p, p . q}, {m^2, -1}, 1}], but every function dealing with these
propagators will expect the same i eta prescription for all propagators in the product.

Then you could do something like FCLoopSwitchEtaSign[SFAD[{{p, p . q}, {m^2, -1}, 1}], 1] but still this probably
won't give you what you want.