Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 12: Theorie

HK 12.3: Talk

Friday, March 4, 2005, 17:15–17:30, TU MA041

Topologically non-trivial QCD field configurations on the lattice — •Stefan Solbrig¹, Christof Gattringer¹, Hugo Reinhardt², Jochen Gattnar², Kurt Langfeld², Torsten Tok², and Andreas Schäfer¹ — ¹Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg — ²Institut für Theoretische Physik, Auf der Morgenstelle 14, 72076 Tübingen

Gluon field configurations with non-trivial topology play a crucial role in QCD. Instantons are clearly related to chiral symmetry breaking and center vortices are strongly correlated with confinement. We present evidence, that there is a deep connection between these two classes of objects. We use the chirally improved lattice Dirac operator to compute eigenvectors and eigenvalues of various lattice gauge field configurations. Removing the vortices from thermalized configurations also removes the topological content of the gauge field. As a consistency check, we apply random changes to raw configurations.

(Supported by BMBF)