Dresden 2000 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 14: Postersitzung / Theorie

HK 14.19: Poster

Donnerstag, 23. März 2000, 10:15–12:45, B 113

Heavy quark mass expansion for color singlet currents and the heavy quark content of light hadrons — •M. Franz¹, M.V. Polyakov^2,1, T. Elwert¹, and K. Goeke¹ — ¹Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum — ²Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188350, Russia

The 1/m-expansion of heavy quark currents can be used for the calculation of the heavy quark content of light hadrons. The heavy quark expansion for the operator Qγ₅Q is presented up to the order 1/m⁵ and its application to the calculation of the intrinsic charm component of the η,η′ mesons and of the nucleon spin is discussed. The results for the tensor current and a contribution to the energy-momentum tensor are determined up to the order 1/m³.