Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-08-06
Phys.Lett.B421:64-70,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages; latex; 5 postscript figures included in submission
Scientific paper
10.1016/S0370-2693(97)01599-2
Using a simple picture of the constituent quark as a composite system of point-like partons, we construct the parton distributions by a convolution between constituent quark momentum distributions and constituent quark structure functions. We evaluate the latter at a low hadronic scale with updated phenomenological information, and we build the momentum distributions using well-known quark models. The resulting parton distributions and structure functions are evolved to the experimental scale and good agreement with the available DIS data is achieved. When compared with a similar calculation using non-composite constituent quarks, the accord with experiment of the present calculation becomes impressive. We therefore conclude that DIS data are consistent with a low energy scenario dominated by composite, mainly non-relativistic constituents of the nucleon.
Scopetta Sergio
Traini Marco
Vento Vicente
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