SpinorUBarD[p, m]
denotes a -spinor that depends on the -dimensional momentum .
Overview, Spinor, SpinorUBar, SpinorU, SpinorV, SpinorVBar, SpinorUD, SpinorVD, SpinorVBarD.
[p, m] SpinorUBarD
[p, m] // FCI // StandardForm
SpinorUBarD
(*Spinor[Momentum[p, D], m, 1]*)
[p] SpinorUBarD
[p] // FCI // StandardForm
SpinorUBarD
(*Spinor[Momentum[p, D], 0, 1]*)
[p] . GSD[p]
SpinorUBarD
[%] DiracEquation