München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 24: Gittereichtheorie

T 24.1: Talk

Monday, March 9, 2009, 17:00–17:15, A021

The spectrum of the QCD flux tube in 3d SU(2) lattice gauge theory — •Bastian Brandt¹ and Pushan Majumdar² — ¹Institut fuer Kernphysik, Johannes Gutenberg-Universitaet, Johann-Joachim Becher-Weg 45, 55099 Mainz, Germany — ²Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India

Evidence from the lattice suggests that formation of a flux tube between a quark and an antiquark in the QCD vacuum leads to quark confinement. For large separations between the quarks , it is conjectured that the flux tube has a behavior similar to an oscillating bosonic string. Comparison of lattice data for the groundstate qq potential to the predictions of effective string theories support this picture. We look at the excited states of the flux tube in 3d SU(2) gauge theory on the lattice and compare our results to the predictions for open bosonic string spectra, in order to distinguish between different bosonic string modells.