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HK: Physik der Hadronen und Kerne

HK 40: Theory VI

HK 40.2: Group Report

Thursday, March 11, 2004, 14:00–14:30, D

Center Vortex Model for the Infrared Sector of SU(3) Yang-Mills Theory — •Markus Quandt, Michael Engelhardt, and Hugo Reinhardt — Institut für Theoretische Physik, Universität Tübingen, 72076 Tübingen, Germany.

The center vortex model for the infrared sector of Yang-Mills theory, previously studied for the SU(2) gauge group, is extended to SU(3) [1]. This model is based on the assumption that vortex world-surfaces can be viewed as random surfaces in Euclidean space-time. The confining properties are investigated, with a particular emphasis on the finite-temperature deconfining phase transition. The model predicts a very weak first order transition, in agreement with SU(3) lattice Yang-Mills theory, and also reproduces a consistent behavior of the spatial string tension in the deconfined phase. The geometrical structure of the center vortices is studied, including vortex branchings, which are a new property of the SU(3) case.
[1] M. Engelhardt, M. Quandt, H. Reinhardt, hep-lat/0311029.