Center vortices and the quark propagator in SU(2) gauge theory

Details Center vortices and the quark propagator in SU(2) gauge theory Center vortices and the quark propagator in SU(2) gauge theory

2008-06-26

arxiv.org/abs/0806.4219v2

Phys.Rev.D78:054509,2008

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures. Version to appear in PRD with slightly extended discussion in section V and 3 new references

Scientific paper

10.1103/PhysRevD.78.054509

We study the behavior of the AsqTad quark propagator in Landau gauge on quenched SU(2) gauge configurations under the removal of center vortices. In contrast to recent results in SU(3), we clearly see the infrared enhancement of the mass function disappear if center vortices are removed, a sign of the intimate relation between center vortices and chiral symmetry breaking in SU(2) gauge-field theory. These results provide a benchmark with which to interpret the SU(3) results. In addition, we consider vortex-only configurations. On those, the quark dressing function behaves roughly as on the full configurations, and the mass function picks up an almost linear momentum dependence.

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