DEUTERON AND NEUTRON STRUCTURE FUNCTIONS AND THE EFFECT OF RELATIVISTIC FERMI MOTION

The deep-inelastic deuteron structure function (SF) F-2(D) in the cova riant approach in the light-cone variables is considered. The neutron SF F-2(n) is extracted from the deuteron and proton experimental data taking into account the relativistic deuteron model and the parametriz ation of F-2(n) is obtained. The effect of the relativistic Fermi moti on is estimated to be 6% at x similar or equal to 0.7. The extracted n eutron SF is used to verify the Gottfried sum rule. It is shown that t he violation of the flavour symmetry of the sea can be large with incr easing Q(2).