Anikin, I. V. and Braun, V. M. and Offen, N. (2015) Electroproduction of the N* (1535) nucleon resonance in QCD. PHYSICAL REVIEW D, 92 (1): 014018. ISSN 1550-7998, 1550-2368
Full text not available from this repository.Abstract
Following the 12 GeV upgrade, a dedicated experiment is planned with the Hall B CLAS12 detector at Jefferson Laboratory, with the aim to study electroproduction of nucleon resonances at high photon virtualities up to Q(2) = 12 GeV2. In this work we present a QCD-based approach to the theoretical interpretation of these upcoming results in the framework of light cone sum rules that combine perturbative calculations with dispersion relations and duality. The form factors are thus expressed in terms of N* (1535) light-front wave functions at small transverse separations, called distribution amplitudes. The distribution amplitudes can therefore be determined from the comparison with the experimental data on form factors and compared to the results of lattice QCD simulations. The results of the corresponding next-to-leading order calculation are presented and compared with the existing data. We find that the form factors are dominated by the twist-four distribution amplitudes that are related to the p-wave three-quark wave functions of the N* (1535), i.e. to contributions of orbital angular momentum.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PION FORM-FACTOR; QUANTUM CHROMODYNAMICS; ASYMPTOTIC-BEHAVIOR; DISTRIBUTION AMPLITUDES; EXCLUSIVE PROCESSES; GENERAL-THEORY; HIGHER TWIST; SUM-RULES; COLLISIONS; PARTICLES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Jul 2019 13:15 |
| Last Modified: | 05 Jul 2019 13:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5203 |
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