Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 43: Hadronenstruktur und -spektroskopie VII

HK 43.3: Talk

Thursday, March 18, 2010, 15:00–15:15, HG III

Heavy quark potential and the quarkonium spectrum — •Alexander Laschka, Norbert Kaiser, and Wolfram Weise — Physik Department, Technische Universität München, D-85747 Garching, Germany

The heavy quark-antiquark potential plays an important role in QCD and can be studied with perturbative as well as with non-perturbative methods. The perturbative short-distance part of the potential in coordinate space is constructed via a subtracted Fourier transform, covering the momentum region where perturbative QCD is applicable. This potential is matched at intermediate distances to the long distance part from lattice QCD simulations. Furthermore we establish the relationship of the charm and bottom quark masses emerging in our potential approach to those of other mass schemes. In addition to the static potential, also quark mass dependent contributions and their effects on the quarkonium spectrum are discussed.

Work supported in part by BMBF, GSI and by the DFG Excellence Cluster “Origin and Structure of the Universe”.