Altenbuchinger, M. and Haegler, Ph. and Weise, W. and Henley, E. M. (2011) Spin structure of the nucleon: QCD evolution, lattice results and models. EUROPEAN PHYSICAL JOURNAL A, 47 (11): 140. ISSN 1434-6001,
Full text not available from this repository. (Request a copy)Abstract
The question how the spin of the nucleon is distributed among its quark and gluon constituents is still a subject of intense investigations. Lattice QCD has progressed to provide information about spin fractions and orbital angular momentum contributions for up and down quarks in the proton, at a typical scale mu(2) similar to 4 GeV2. On the other hand, chiral quark models have traditionally been used for orientation at low momentum scales. In the comparison of such model calculations with experiment or lattice QCD, fixing the model scale and the treatment of scale evolution are essential. In this paper, we present a refined model calculation and a QCD evolution of lattice results up to next-to-next-to-leading order. We compare this approach with the Myhrer-Thomas scenario for resolving the proton spin puzzle.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INELASTIC STRUCTURE FUNCTIONS; DYNAMICAL PARTON DISTRIBUTIONS; FREE GAUGE-THEORIES; TO-LEADING ORDER; BAG MODEL; QUANTUM CHROMODYNAMICS; PROTON; MOMENTS; SCATTERING; PHYSICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 May 2020 05:54 |
| Last Modified: | 27 May 2020 05:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19831 |
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