What did we learn about GPDs from hard exclusive electroproduction of mesons
Abstract
It is reported on an analysis of electroproduction of light mesons at small Bjorken-x (xBj) within the handbag approach. The partonic subprocesses, meson electroproduction off quarks or gluons, are calculated within the modified per-turbative approach (m.p.a.) in which quark transverse momenta are retained. The soft hadronic matrix elements, generalized parton distributions (GPDs), are constructed by means of double distributions. The constraints from parton distributions and sum rules are taken into account. Various moments of these GPDs are compared to recent results from lattice gauge theories.
- Publication:
-
12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2010)
- Pub Date:
- October 2011
- DOI:
- 10.1063/1.3647106
- arXiv:
- arXiv:1009.2356
- Bibcode:
- 2011AIPC.1374..103K
- Keywords:
-
- hadron electroproduction;
- mesons;
- lattice field theory;
- flavour model;
- 25.30.Rw;
- 14.40.Be;
- 11.15.Ha;
- 11.30.Hv;
- Electroproduction reactions;
- Lattice gauge theory;
- Flavor symmetries;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 6 pages, 8 figures, using Latex, talk presented at 12th Intern. Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2010, Williamsburg