The Structure Functions of 3He and 3H Nuclei in the Constituent Quark Exchange Model

The valence quark exchange (QE) model for the nuclear system and the constituent quark (CQ) model in which the quarks are assumed to be the complex objects, are used to calculate the parton distributions and the structure functions (SF) of 3He and 3H mirror nuclei. The effect and the role of sea quarks and gluons, and their contributions to the SF of 3He and 3H nuclei are analyzed. Specifically, for small x regions a more “realistic” result is found with respect to our previous works, in which only the valence quarks have been considered. By using the DGLAP evolution equations, the resulting parton distributions and SF are evolved to the high-energy scales and compared with available data. Finally, the ratios of 3He to 3H nuclei SF with the isospin symmetry assumption is compared to the results of the deep inelastic electron experiments on the 3He and 3H nuclei, especially, those which have been extracted from the kinematic region of the proposed 11 GeV upgraded beam experiment of Jefferson laboratory, and a reasonable agreement is found.