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HK: Physik der Hadronen und Kerne

HK 10: Postersitzung: Theorie

HK 10.4: Poster

Tuesday, March 20, 2001, 10:30–12:45, R

Meson twist-4 parton distributions in terms of twist-2 distribution amplitudes at large N_c — •Nam-Young Lee¹, P.V. Pobylitsa^1,2, M.V. Polyakov^1,2, and K. Goeke¹ — ¹Institut für Theoretische Physik II, Ruhr–Universität Bochum,D–44780 Bochum, Germany — ²Petersburg Nuclear Physics Institute, Gatchina, St.Petersburg 188350, Russia

We show that in the large N_c limit four-quark twist-4 distributions in the pion can be expressed in terms of twist-2 pion distribution amplitude. This allows us to compute the isospin-2 structure function of the pion F₂^I=2(x_B) in the large N_c limit. The method can be easily applied to other mesons as well.