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HK: Physik der Hadronen und Kerne

HK 16: Theory II

HK 16.2: Vortrag

Dienstag, 12. März 2002, 17:15–17:30, A

Scale setting with Hypercubic Blocking — •Roland Hoffmann — Institut für Theoretische Physik, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg

We measure the static potential from Wilson loops constructed using hypercubic blocked (HYP) links. The HYP smearing mixes gauge links within hypercubes attached to the original link only. The HYP potential agrees with the potential measured using thin links for distances r/a≥2. We calculated the lowest order perturbative expansion of the lattice Coulomb potential of HYP links. These results are used in analyzing the static potential with Wilson’s action as well as with the Lüscher-Weisz action. The statistical accuracy of the potential with HYP links improves by about an order of magnitude, which makes it possible to determine a reliable scale even with limited statistics.