FVE[p, mu]
is the -dimensional vector with Lorentz index .
Overview, FCE, FCI, FV, FVD, Pair.
[p, \[Mu]] FVE
[p - q, \[Mu]] FVE
[p, \[Mu]] // StandardForm
FVE
(*FVE[p, \[Mu]]*)
[FVE[p, \[Mu]]] // StandardForm
FCI
(*Pair[LorentzIndex[\[Mu], -4 + D], Momentum[p, -4 + D]]*)
There is no special function to expand momenta in FVE
.
= ExpandScalarProduct[FVE[p - q, \[Mu]]] ex
// StandardForm
ex
(*Pair[LorentzIndex[\[Mu], -4 + D], Momentum[p, -4 + D]] - Pair[LorentzIndex[\[Mu], -4 + D], Momentum[q, -4 + D]]*)
[FVE[p, \[Mu]] FV[q, \[Mu]]] Contract