Parton model functions scaling function

In the following chapter we shall see how the quark-parton model explains the occurrence of Bjorken scaling and we shall obtain expressions for all the scaling functions in terms of number densities for the quark-partons in a hadron. 

Thus the parton model expressions for the scaling functions to be used in (15.5.9) are ... 

This completes the specification of the quark-parton model formulae for the scaling functions relevant to scattering on an unpolarized nucleon target in the region [Pg.374]

Let us now look at some of the relations amongst the scaling functions in the quark-parton model. We shall see that where these have been tested the results are, with one exception at present, generally in agreement with the predictions. 

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