Freund, A. (2003) Detailed QCD analysis of twist-3 effects in deeply virtual Compton scattering observables. PHYSICAL REVIEW D, 68 (9): 096006. ISSN 0556-2821
Full text not available from this repository.Abstract
In this paper I present a detailed QCD analysis of twist-3 effects in the Wandzura-Wilczek (WW) approximation in deeply virtual Compton scattering (DVCS) observables for various kinematical settings, representing the DESY HERA, HERMES, CLAS and the planned EIC (electron-ion-collider) experiments. I find that the twist-3 effects in the WW approximation are almost always negligible at collider energies but can be large for low Q(2) and smaller x(bj) in observables for the lower energy, fixed target experiments directly sensitive to the real part of DVCS amplitudes like the charge asymmetry. Conclusions are then drawn about the reliability of extracting twist-2 generalized parton distributions (GPDs) from experimental data and a first, phenomenological, parametrization of the LO and NLO twist-2 GPD H, describing all the currently available DVCS data within the experimental errors is given.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERALIZED PARTON DISTRIBUTIONS; IMPACT PARAMETER SPACE; EVOLUTION KERNELS; NUCLEON; ORDER; DVCS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 12:35 |
| Last Modified: | 27 Jul 2021 12:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38493 |
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