An alternate smearing method for Wilson loops in lattice QCD (original) (raw)

2004, The European Physical Journal C

AI-generated Abstract

An alternate smearing method has been developed for improving the effective field theory of Wilson loops in lattice Quantum Chromodynamics (QCD). The proposed method offers enhanced control over the gauge configurations by addressing the limitations of standard techniques. Comprehensive comparisons with existing approaches demonstrate its robustness and applicability in various theoretical frameworks.

Investigation of Lattice QCD with Wilson fermions with Gaussian Smearing

Arxiv preprint arXiv:0712.4354, 2007

Abstract: We present a detailed study of pion and rho mass, decay constants and quark mass in Lattice QCD with two flavors of dynamical quarks. We use Wilson gauge and fermion action at beta=5.6\ beta= 5.6beta=5.6 on 163times3216^ 3\ times 32163times32 lattice at eight values of the Wilson hopping parameter in the range 0.156-0.158. We perform a detailed investigation of the effect of gaussian smearing on both source and sink. We determine the optimum smearing parameter for various correlators for each value of the Wilson hopping parameter. The ...

Wilson loops in very high order lattice perturbation theory

Proceedings of The XXVII International Symposium on Lattice Field Theory — PoS(LAT2009)

We calculate Wilson loops of various sizes up to loop order n = 20 for lattice sizes of L 4 (L = 4, 6, 8, 12) using the technique of Numerical Stochastic Perturbation Theory in quenched QCD. This allows to investigate the behaviour of the perturbative series at high orders. We discuss three models to estimate the perturbative series: a renormalon inspired fit, a heuristic fit based on an assumed power-law singularity and boosted perturbation theory. We have found differences in the behavior of the perturbative series for smaller and larger Wilson loops at moderate n. A factorial growth of the coefficients could not be confirmed up to n = 20. From Monte Carlo measured plaquette data and our perturbative result we estimate a value of the gluon condensate α π GG .

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