GALRD[mu,n,nb]
denotes the perpendicular component in the lightcone decomposition of the Dirac matrix along the vectors n
and nb
in dimensions. It corresponds to .
If one omits n
and nb
, the program will use default vectors specified via $FCDefaultLightconeVectorN
and $FCDefaultLightconeVectorNB
.
Overview, DiracGamma, GALND, GALPD, GSLPD, GSLND, GSLRD.
[\[Mu], n, nb] GALRD
StandardForm[GALRD[\[Mu], n, nb] // FCI]
(*DiracGamma[LightConePerpendicularComponent[LorentzIndex[\[Mu], D], Momentum[n, D], Momentum[nb, D]], D]*)
Notice that the properties of n
and nb
vectors have to be set by hand before doing the actual computation
[\[Mu], n, nb] . GALPD[\[Nu], n, nb] // DiracSimplify GALRD
[]
FCClearScalarProducts[n] = 0;
SPD[nb] = 0;
SPD[n, nb] = 2; SPD
[\[Mu], n, nb] . GALPD[\[Nu], n, nb] // DiracSimplify GALRD
[] FCClearScalarProducts