CartesianPropagatorDenominator[propSq + ..., propEik + ..., m^2, {n, s}]
encodes a generic Cartesian propagator denominator of the form
propSq
should be of the form CartesianMomentum[q1, D - 1]
, while propEik
should look like CartesianPair[CartesianMomentum[q1, D - 1], CartesianMomentum[p1, D - 1]
.
CartesianPropagatorDenominator
is an internal object. To enter such propagators in FeynCalc you should use CFAD
.
Overview, CFAD, FeynAmpDenominator.
Standard -dimensional Cartesian propagator
[CartesianPropagatorDenominator[CartesianMomentum[p, D - 1], 0, m^2, {1, -1}]] FeynAmpDenominator
Here we switch the sign of the mass term
[CartesianPropagatorDenominator[CartesianMomentum[p, D - 1], 0, -m^2, {1, -1}]] FeynAmpDenominator
And here also the sign of
[CartesianPropagatorDenominator[CartesianMomentum[p, D - 1], 0, -m^2, {1, +1}]] FeynAmpDenominator
Eikonal Cartesian propagator with a residual mass term
[CartesianPropagatorDenominator[0,
FeynAmpDenominator[CartesianMomentum[p, D - 1], CartesianMomentum[q, D - 1]], m^2, {1, -1}]] CartesianPair