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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Hadronenstruktur und -spektroskopie IX

HK 58.5: Talk

Thursday, March 24, 2011, 17:45–18:00, C-2

Mass dependence of the heavy quark-antiquark potential and its effects on quarkonium spectra — •Alexander Laschka, Norbert Kaiser, and Wolfram Weise — Physik Department, Technische Universität München, D-85747 Garching, Germany

The heavy quark-antiquark potential can be studied in perturbative QCD and in lattice simulations. In addition to the leading order static potential, quark mass dependent corrections are examined. We show that for the static term as well as for the mass dependent corrections, the perturbative short-distance part can be matched at intermediate distances with results from lattice QCD. From these matched potentials, quarkonium spectra with a single free parameter (the heavy quark mass) are derived and compared with empirical spectra. Furthermore, charm and bottom quark masses are deduced and compared with values extracted from other schemes.

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