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