Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 37: Elektromagnetische und Hadronische Proben
HK 37.2: Vortrag
Mittwoch, 9. März 2005, 14:15–14:30, TU MA001
Form factors of the energy-momentum tensor in the Skyrme model — •Christoph Cebulla1, Jens Ossmann1, Peter Schweitzer1, K. Goeke1, and M. Polyakov2,3 — 1Institute for Theoretical Physics II, Ruhr-University Bochum, 44801 Bochum,Germany — 2Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, Russia — 3Institute de Physique, B5a, Université de Liège au Sant Tilman, B-4000 Liège 1 Belgium
We study the nucleon form factors of the energy-momentum tensor in the framework of the Skyrme model[1]. Based on work done by M.V. Polyakov[2] we obtain model expressions for the form factors as well as for what can be interpreted as radial distributions of "pressure" and "shear" forces and calculate them numerically. We verify the internal consistency of the model and compare with results obtained within other models or methods. The results for the so-called D-term are of interest for phenomenology related to generalized parton distribution functions.
[1] T.H.R. Skyrme. A nonlinear field theory. Proc. Roy. Soc. Lond., A260:127-138,1961
[2] M.V. Polyakov. Generalized parton distributions and strong forces inside nucleons and nuclei. Phys. Lett., B555:57-62, 2003