Anomalous Evolution of Nonsinglet Structure Functions

Details Anomalous Evolution of Nonsinglet Structure Functions Anomalous Evolution of Nonsinglet Structure Functions

1994-09-07

arxiv.org/abs/hep-ph/9409249v3

Nucl.Phys.Proc.Suppl. 39BC (1995) 28-31

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 5 figures included as three compressed .ps files, plain LATEX, CERN-TH.7436/94 technical glitch fixed

Scientific paper

10.1016/0920-5632(95)00037-A

We review a formalism that includes the effects of nonperturbative U(1) symmetry breaking on the QCD evolution of nonsinglet structure functions. We show that a strong scale dependence is generated in an intermediate energy range $0.5 \lsim Q^2 \lsim 5$~GeV$^2$ for all values of $x$. We show that this explains naturally the observed violation of the Gottfried sum, and allows a determination of the shape of the nonsinglet structure function, in excellent agreement with experiment. We argue that these effects may affect the determination of $\alpha_s$ from deep--inelastic scattering.

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