The effect of quark exchange in A = 3 mirror nuclei and neutron/proton structure functions ratio.

By using the quark-exchange formalism, the realistic Faddeev wave function and the Fermi motion effect, we investigate the deep inelastic electron scattering from A = 3 mirror nuclei in the deep-valence region. The initial valence quark input is taken from the GRV's (Glück, Reya and Vogt) fitting procedure and the next-to-leading-order QCD evolution on F 2 p( x, Q 2) which gives a very good fit to the available data in the ( x, Q 2)-plane. It is shown that the free neutron to proton structure functions ratio can be extracted from the corresponding EMC ratios for 3He and 3H mirror nuclei by using the self-consistent iteration procedure and the results are in good agreement with the other theoretical models as well as the present available experimental data and especially the projected data expected from the proposed 11GeV Jefferson Laboratory in the near future. [ABSTRACT FROM AUTHOR]