  The cross section asymmetry $\Sigma$ in deuteron disintegration with linearly
polarized light is considered in the framework of the Bethe-Salpeter formalism.
Relativistic contributions to the asymmetry are investigated within the
approximation, which takes into account the one-body part of the
electromagnetic current operator and the dominant positive-energy partial
amplitudes of the Bethe-Salpeter vertex function of the deuteron.
