Twist expansion of the nucleon structure functions, F2 and FL, in the DGLAP improved saturation model

Details Twist expansion of the nucleon structure functions, F2 and FL, in the DGLAP improved saturation model Twist expansion of the nucleon structure functions, F2 and FL, in the DGLAP improved saturation model

2009-11-10

arxiv.org/abs/0911.1935v1

Phys.Rev.D81:054017,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 11 figures

Scientific paper

10.1103/PhysRevD.81.054017

Higher twist effects in the deeply inelastic scattering are studied. We start with a short review of the theoretical results on higher twists in QCD. Within the saturation model we perform a twist analysis of the nucleon structure functions FT and FL at small value of the Bjorken variable x. The parameters of the model are fitted to the HERA F2 data, and we derive a prediction for the longitudinal structure function FL. We conclude that for FL the higher twist corrections are sizable whereas for F2 = FT + FL there is a nearly complete cancellation of twist-4 corrections in FT and FL. We discuss a few consequences for future LHC measurements.

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