GALR[mu,n,nb]
denotes the perpendicular component in the lightcone decomposition of the Dirac matrix along the vectors n
and nb
. It corresponds to .
If one omits n
and nb
, the program will use default vectors specified via $FCDefaultLightconeVectorN
and $FCDefaultLightconeVectorNB
.
Overview, DiracGamma, GALN, GALP, GSLP, GSLN, GSLR.
[\[Mu], n, nb] GALR
StandardForm[GALR[\[Mu], n, nb] // FCI]
(*DiracGamma[LightConePerpendicularComponent[LorentzIndex[\[Mu]], Momentum[n], Momentum[nb]]]*)
Notice that the properties of n
and nb
vectors have to be set by hand before doing the actual computation
[\[Mu], n, nb] . GALP[\[Nu], n, nb] // iracSimplify GALR
[]
FCClearScalarProducts[n] = 0;
SP[nb] = 0;
SP[n, nb] = 2; SP
[\[Mu], n, nb] . GALP[\[Nu], n, nb] // DiracSimplify GALR
[] FCClearScalarProducts