Bochum 1998 – wissenschaftliches Programm
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HK: Hadronen und Kerne
HK 68: Structure of Baryons, Mesons X, Theory
HK 68.9: Vortrag
Donnerstag, 19. März 1998, 16:45–17:00, J
The Gottfried sum in the large–Nc limit — •T. Watabe3, D.I. Diakonov1, V.Yu. Petrov2, P.V. Pobylitsa2, M.V. Polyakov2,3, K. Goeke3, and C. Weiss3 — 1NORDITA, Copenhagen — 2Petersburg Nuclear Physics Institute, St. Petersburg — 3Institut für Theoretische Physik II, Ruhr–Universität Bochum
The Gottfried sum measures the flavor asymmetry of the antiquark distribution in the nucleon, which is experimentally non-zero. The large–Nc picture of the nucleon as a soliton of the effective chiral theory naturally leads to a flavor–asymmetric antiquark distribution [1]. We compute the Gottfried sum as well as the flavor–nonsinglet quark distribution functions in the chiral soliton model and compare with the experimental data.
[1] D.I. Diakonov, V.Yu. Petrov, P.V. Pobylitsa, M.V. Polyakov and C. Weiss, Nucl. Phys. B 480 (1996) 341.