Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 67: Structure of Baryons, Mesons IX, Theory

HK 67.6: Vortrag

Donnerstag, 19. März 1998, 15:45–16:00, H

Nondiagonal quark distributions of the nucleon in the large N_c limit — •I. Börnig², V.Yu. Petrov¹, P.V. Pobylitsa¹, M.V. Polyakov^1,2, K. Goeke², and C. Weiss² — ¹Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188350, Russia — ²Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum

We study the non-diagonal quark distributions (NDQD’s) in the chiral quark-soliton model of the nucleon. This model is based on the large-N_c picture of the nucleon as a soliton of the effective chiral lagrangian and allows to calculate the leading twist quark- and antiquark distributions at a low normalization point. We demonstrate the consistency of the approach by checking various sum rules for the NDQD’s. Possible enhancement of the deeply-virtual Compton scattering cross section is discussed.