LightConePerpendicularComponent[LorentzIndex[mu],Momentum[n],Momentum[nb]]
denotes the perpendicular component of the Lorentz index mu
with respect to the lightcone momenta n
and nb
.
LightConePerpendicularComponent[Momentum[p],Momentum[n],Momentum[nb]]
denotes the perpendicular component of the 4-momentum p
with respect to the lightcone momenta n
and nb
.
Overview, LorentzIndex, Momentum.
-dimensional Lorentz vector
[LightConePerpendicularComponent[LorentzIndex[\[Mu]], Momentum[n],Momentum[nb]],
Pair[Momentum[p], Momentum[n], Momentum[nb]]] LightConePerpendicularComponent
Metric tensor
[LightConePerpendicularComponent[LorentzIndex[\[Mu]], Momentum[n],Momentum[nb]],
Pair[LorentzIndex[\[Nu]], Momentum[n], Momentum[nb]]] LightConePerpendicularComponent
Dirac matrix
[LightConePerpendicularComponent[LorentzIndex[\[Mu]], Momentum[n], Momentum[nb]]] DiracGamma
Contractions
[LightConePerpendicularComponent[LorentzIndex[\[Mu]],
DiracGamma[n], Momentum[nb]]] FV[p, \[Mu]] // Contract
Momentum
% // StandardForm
(*DiracGamma[LightConePerpendicularComponent[Momentum[p], Momentum[n], Momentum[nb]]]*)