FCLoopEikonalPropagatorFreeQ[exp]
checks if the integral is free of eikonal propagators . If the option First
is set to False
, propagators that have both a quadratic and linear piece, e.g. will also count as eikonal propagators. The option Momentum
can be used to check for the presence of eikonal propagators only with respect to particular momenta. The check is performed only for StandardPropagatorDenominator
and CartesianPropagatorDenominator
.
[p, p - q]
FCI@SFAD
[%] FCLoopEikonalPropagatorFreeQ
[{{0, p . q}}]
FCI@SFAD
[%] FCLoopEikonalPropagatorFreeQ
[{{0, p . q}}]
FCI@CFAD
[%, Momentum -> {q}] FCLoopEikonalPropagatorFreeQ
[{{q, q . p}}]
FCI@SFAD
[%, First -> False] FCLoopEikonalPropagatorFreeQ