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