Moments of polarized parton distribution functions |
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| Authors: | V. Bernard T. R. Hemmert U.-G. Meißner |
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| Affiliation: | (1) U. L. Pasteur, LPT, Strasbourg, France;(2) Theoretische Physik T39, Physik Department, TU München, Garching, Germany;(3) FZ Jülich, IKP(Th), Jülich, Germany |
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| Abstract: | We present novel results for the first moment of the spin-dependent structure function g 1(x,Q 2) of the nucleon at  small (Q 2 < 0.3 GeV2) photon virtuality in the framework of a relativistic formulation of baryon chiral perturbation theory. We perform a next-to-leading order calculation and obtain significant differences to previously found results based on the heavy-baryon approach for the proton and neutron.Received: 30 September 2002, Published online: 22 October 2003PACS: 12.39.Fe Chiral Lagrangians - 14.20.Dh Protons and neutrons |
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