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