FCLoopMixedToCartesianAndTemporal
FCLoopMixedToCartesianAndTemporal[int, {q1, q2, ...}]
attempts to convert loop integrals that contain both Lorentz and Cartesian or temporal indices/momenta to pure temporal and Cartesian indices.
See also
Overview
Examples
FCI@SFAD[q]
FCLoopMixedToCartesianAndTemporal[%, {q}, FCE -> True]
(q2+iη)1
−(q2−(q0)2−iη)1
FCI@SFAD[{q1 + q2 + p, m^2}]
FCLoopMixedToCartesianAndTemporal[%, {q1, q2}]
((p+q1+q2)2−m2+iη)1
−((p+q1+q2)2+m2−((p+q1+q2)0)2−iη)1
FCI[TC[k] FVD[k, mu] FAD[k, k + p]]
FCLoopMixedToCartesianAndTemporal[%, {k}]
k2.(k+p)2k0kmu
(k2−(k0)2−iη).((k+p)2−((k+p)0)2−iη)k0(k0gˉ0mu−k$g$mu)