Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 56: Hadron Structure and Spectroscopy I

HK 56.9: Talk

Wednesday, March 18, 2009, 18:45–19:00, H-ZO 20

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

The quarkonium potential has been studied by lattice simulations as well as in perturbative QCD. It is an ideal object for exploring the interplay between perturbative and non-perturbative physics. However, the perturbative prediction is subject to ambiguities and tends to fail already at very small distances. We show how to derive a well-defined and stable short-distance potential that can be matched to results from lattice QCD simulations at intermediate distances. The static potential as well as quark mass dependent corrections are discussed and implications on the quarkonium spectrum are shown.

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