Perturbative Q2-power corrections to the structure function g1 |
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| Authors: | B.I. Ermolaev M. Greco S.I. Troyan |
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| Affiliation: | (1) Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia;(2) Dipartimento di Fisica and INFN, Via della Vasca Navale 84, 00146 Roma , Italy;(3) St. Petersburg Institute of Nuclear Physics, 188300 Gatchina, Russia |
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| Abstract: | We show that (∼1/(Q2)k) power corrections to the spin structure function g1 at small x are generated perturbatively from the regulated infrared divergencies. 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 power corrections conventionally attributed to the higher twists. PACS 12.38.Cy |
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