Perturbative power Q^2-corrections to the structure function g(1)

Details Perturbative power Q^2-corrections to the structure function g(1) Perturbative power Q^2-corrections to the structure function g(1)

2006-07-03

arxiv.org/abs/hep-ph/0607024v2

Eur.Phys.J.C51:859-866,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Theoretical grounds for our approach are considered in much more detailed way than in the previous version; 10 pages, 2 figure

Scientific paper

10.1140/epjc/s10052-007-0353-0

We prove that regulating infrared divergencies generates power (~1/(Q^2)^k) corrections to the spin structure function g_1 at small x and large Q^2. At the same time it leads to the corrections ~(Q^2)^k at small Q^2. We present the explicit series of such terms as well as the formulae for their resummation. These contributions are not included in the standard analysis of the experimental data. We argue that accounting for such terms can sizably change the impact of the other power corrections conventionally attributed to the higher twists.

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