  Linear spinor fields are a generalization of the Dirac field that have
transparent cluster decomposability properties needed for classical
correspondence of relativistic quantum systems. The algebra of these fields
directly incorporate gravitation within a group that unifies the dynamics of
the same number of additional hermitian carriers of quantum numbers as there
are gauge fields in SU(3)$\times$SU(2)$\times$U(1). They also provide a
mechanism for the dynamic mixing of massless neutrinos using a "transverse
mass" conjugate to the affine parameter labeling translations along its
light-like trajectory, consistent with those in the standard model.
