Wed·Sep 12, 2007Wednesday·September 12, 2007

1. 01*

   Correlations of chiral condensates and quark number densities with static quark sources

   Kay Huebner🇺🇸

   We investigate correlation functions of the Polyakov loop and static meson/diquark systems with the chiral condensate and the quark number density at finite temperature. In particular the latter observable can give insight in the mechanism of screening and string breaking at finite temperature. We use for our analysis gauge field configurations generated in 2+1 flavor QCD with an improved staggered fermion action with almost physical light quark masses and a physical value of the strange quark mass on lattices with temporal extent Nt=4 and 6.

   hep-latPoS(2007)·3 citations
2. 02*

   Scaling analysis of FLIC fermion actions

   Waseem Kamleh🇦🇺 · Ben Lasscock🇦🇺 · Derek B. Leinweber🇦🇺 · Anthony G. Williams🇦🇺

   The Fat Link Irrelevant Clover (FLIC) fermion action is a variant of the $O(a)$-improved Wilson action where the irrelevant operators are constructed using smeared links. While the use of such smearing allows for the use of highly improved definitions of the field strength tensor $F_{\mu \nu },$ we show that the standard 1-loop clover term with a mean field improved coefficient $c_{\mathrm{sw}}$ is sufficient to remove the $O(a)$ errors, avoiding the need for non-perturbative tuning. This result enables efficient dynamical simulations in QCD with the FLIC fermion action.

   hep-latPRD(2008)·5 citations
3. 03*

   Rigidity and percolation of center vortices

   P. V. Buividovich🇧🇾 · M. I. Polikarpov🇷🇺 · V. I. Zakharov🇷🇺

   Effective action of center vortices in SU(2) lattice gauge theory is investigated by studying the correlation between the action density on their worldsheets and their geometric properties. It turns out that center vortices are rigid, however, their dynamics is more complicated than that of rigid random surfaces, since some coupling constants have nonstandard scaling dimensions. As a result, the properties of center vortices are almost completely determined by curvature-dependent effects. This, in turn, provides a qualitative explanation of vortex percolation.

   hep-latPoS(2007)·2 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.