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Dynamical rescaling and universality of hadron structure functions

Authors:	FE Close RG Roberts GG Ross

Institution:	Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK;Department of Theoretical Physics, University of Oxford, 1 Keble Road, Oxford, UK

Abstract:	We argue that pion and nucleon structure functions differ principally due to their different numbers of quarks and different scales of confinement. The former generates an x rescaling while the latter, in QCD, gives rise to a Q² rescaling. Together these lead to the relation $F_{π} (x, Q^{2}) = F_{N} (23 x, ξ_{N_{π}} Q^{2})$ with $ξ_{Nπ} ? 0.16$ , for x values away from the end points. This relation is in good agreement with data.

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