Unpolarized structure functions and the parton distributions for nucleon in an independent quark model

Considering the nucleon as consisting entirely of its valence quarks confin ed independently in a scalar-vector harmonic potential: unpolarized structu re functions F-1 (x, mu (2)) and F-2(x, mu (2)) are derived in the Bjorken limit under certain simplifying assumptions: from which valence quark distr ibution functions u(v)(x, mu (2)) and d(v)(x, mu (2)) are appropriately ext racted satisfying the normalization constraints. QCD-evolution of these inp ut distributions from a model scale of mu (2) = 0.07 GeV2 to a higher Q(2) scale of Q(0)(2) = 15 GeV2 yields xu(v)(x, Q(0)(2)) and xd(v)(x, Q(0)(2)) i n good agreement with experimental data. The gluon and sea-quark distributi ons such as G(x, Q(0)(2)) and q(s)(x, Q(0)(2)) are dynamically generated wi th a reasonable qualitative agreement with the available data; using the le ading order renormalization group equations with appropriate valence-quark distributions as the input.