Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-01-11
Phys.Rev.D77:074502,2008; Erratum-ibid.D77:099902,2008
Physics
High Energy Physics
High Energy Physics - Lattice
19 pages, 18 figures
Scientific paper
10.1103/PhysRevD.77.074502
A detailed comparison is made between the topological structure of quenched QCD as revealed by the recently proposed over-improved stout-link smearing in conjunction with an improved gluonic definition of the topological density on one hand and a similar analysis made possible by the overlap-fermionic topological charge density both with and without variable ultraviolet cutoff $\lambda_{cut}$. The matching is twofold, provided by fitting the density-density two-point functions on one hand and by a point-by-point fitting of the topological densities according to the two methods. We point out the similar cluster structure of the topological density for moderate smearing and $200 \mathrm{MeV} < \lambda_{cut} < 600 \mathrm{MeV}$, respectively. We demonstrate the relation of the gluonic topological density for extensive smearing to the location of the overlap zero modes and the lowest overlap non-zero mode as found for the unsmeared configurations.
Ilgenfritz Ernst-Michael
Koller Karl
Leinweber Derek
Moran Patrick
Schierholz Gerrit
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