Goeckeler, Meinulf and Horsley, R. and Kuerzinger, W. and Oelrich, H. and Pleiter, D. and Rakow, P. E. L. and Schaefer, Andreas and Schierholz, G. (2001) Lattice calculation of the nucleon's spin-dependent structure function g(2) reexamined. PHYSICAL REVIEW D, 63 (7): 074506. ISSN 0556-2821
Full text not available from this repository.Abstract
Our previous calculation of the spin-dependent structure function g(2) is reexamined. Interest in this structure function is to a great extent motivated by the fact that it receives contributions from twist-2 as well as from twist-3 operators already in leading order of 1/Q(2), thus offering the unique possibility of directly assessing higher-twist effects. In our former calculation the lattice operators were renormalized perturbatively and mixing with lower-dimensional operators was ignored. However, the twist-3 operator which gives rise to the matrix element d(2) mixes non-perturbatively with an operator of lower dimension. Taking this effect into account leads to a considerably smaller value of d(2), which is consistent with the experimental data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | STRUCTURE-FUNCTION G(2)(X,Q(2)); STRUCTURE-FUNCTION G2(X; NONPERTURBATIVE RENORMALIZATION; TRANSVERSE SPIN; QUANTUM CHROMODYNAMICS; TWIST-3 OPERATORS; POLARIZED TARGET; QCD; SCATTERING; PROTON; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Feb 2022 07:56 |
| Last Modified: | 08 Feb 2022 07:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41621 |
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