SOD[q]
is a -dimensional scalar product of OPEDelta
with q
. It is transformed into Pair[Momentum[q,D], Momentum[OPEDelta,D]
by FeynCalcInternal
.
Overview, OPEDelta, Pair, ScalarProduct, SOD.
[p] SOD
[p - q] SOD
[p] // FCI // StandardForm
SOD
(*Pair[Momentum[OPEDelta, D], Momentum[p, D]]*)