Braun, V. M. and Lautenschlager, T. and Manashov, A. N. and Pirnay, B. (2011) Higher twist parton distributions from light-cone wave functions. PHYSICAL REVIEW D, 83 (9): 094023. ISSN 2470-0010, 2470-0029
Full text not available from this repository.Abstract
We explore the possibility to construct higher-twist parton distributions in a nucleon at some low reference scale from convolution integrals of the light-cone wave functions (WFs). To this end we introduce simple models for the four-particle nucleon WFs involving three valence quarks and a gluon with total orbital momentum zero, and estimate their normalization (WF at the origin) using QCD sum rules. We demonstrate that these WFs provide one with a reasonable description of both polarized and unpolarized parton densities at large values of the Bjorken variable x >= 0.5. Twist-three parton distributions are then constructed as convolution integrals of qqqg and the usual three-quark WFs. The cases of the polarized structure function g(2)(x, Q(2)) and single transverse spin asymmetries are considered in detail. We find that the so-called gluon pole contribution to twist-three distributions relevant for single spin asymmetry vanishes in this model, but is generated perturbatively at higher scales by the evolution, in the spirit of Gluck-Reya-Vogt parton distributions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DEEP-INELASTIC-SCATTERING; TRANSVERSE-SPIN ASYMMETRY; POLARIZED STRUCTURE FUNCTIONS; STRUCTURE-FUNCTION G(2)(X; STRUCTURE-FUNCTION G2(X; QUANTUM CHROMODYNAMICS; SUM-RULES; DISTRIBUTION AMPLITUDES; PRECISION-MEASUREMENT; EVOLUTION EQUATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Jun 2020 08:49 |
| Last Modified: | 15 Jun 2020 08:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20815 |
Actions (login required)
 |
View Item |
