Nucleon structure functions in a constituent quark scenario

Abstract

Using a simple picture of the constituent quark as a composite system of point-like partons, we construct the polarized parton distributions by a convolution between constituent quark momentum distributions and constituent quark structure functions. We achieve good agreement with experiments in the unpolarized as well as in the polarized case, though a good description of the recent polarized neutron data requires the introduction of one more parameter. When our results are compared with similar calculations using non-composite constituent quarks, the accord with the experiments of the present scheme is impressive. We conclude that DIS data are consistent with a low energy scenario dominated by composite constituents of the nucleon.

Comments: 5 pages; latex; 4 ps figures; based on two talks given at: 1) Workshop ``N${}^{\ast }$ Physics and non perturbative QCD'', Trento, Italy, May 18-29 1998, to be published in Few Body Systems, Suppl.; 2) Conference ``Few Body 16${}^{th}$'', Autrans, France, June 1-6, 1998, to be published in Few Body Systems, Suppl