Lee, Nam-Young and Goeke, K. and Weiss, Christian (2002) Spin-dependent twist-4 matrix elements from the instanton vacuum: Flavor-singlet and nonsinglet. PHYSICAL REVIEW D, 65 (5): 054008. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
We estimate the twist-4 spin-1 nucleon matrix element f(2) in an instanton-based description of the QCD vacuum. In addition to the flavor-non singlet we compute also the flavor-singlet matrix element, which appears in next-to-leading order of the 1/N-c-expansion. The corresponding twist-3 spin-2 matrix elements d(2) are suppressed in the packing fraction of the instanton medium, (rho) over bar/(R) over bar << 1. We use our results to estimate the leading 1/Q(2) power corrections to the first moment of the proton and neutron spin structure functions G(1), as well as the intrinsic charm contribution to the nucleon spin.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DEEP-INELASTIC-SCATTERING; STRUCTURE FUNCTIONS G(1); N-C LIMIT; SUM-RULE; QUANTUM CHROMODYNAMICS; POWER CORRECTIONS; NUCLEON; PROTON; Q(2)-DEPENDENCE; OPERATORS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Nov 2021 07:12 |
| Last Modified: | 09 Nov 2021 07:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40571 |
Actions (login required)
 |
View Item |
