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Title: Probing Wilson loops in the QCD instanton vacuum

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 91; Journal Issue: 3; Journal ID: ISSN 1550-7998
American Physical Society
Country of Publication:
United States

Citation Formats

Liu, Yizhuang, and Zahed, Ismail. Probing Wilson loops in the QCD instanton vacuum. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.034023.
Liu, Yizhuang, & Zahed, Ismail. Probing Wilson loops in the QCD instanton vacuum. United States. doi:10.1103/PhysRevD.91.034023.
Liu, Yizhuang, and Zahed, Ismail. 2015. "Probing Wilson loops in the QCD instanton vacuum". United States. doi:10.1103/PhysRevD.91.034023.
title = {Probing Wilson loops in the QCD instanton vacuum},
author = {Liu, Yizhuang and Zahed, Ismail},
abstractNote = {},
doi = {10.1103/PhysRevD.91.034023},
journal = {Physical Review D},
number = 3,
volume = 91,
place = {United States},
year = 2015,
month = 2

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.91.034023

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Cited by: 4works
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  • Cited by 5
  • Nonperturbative and perturbative interaction mechanisms of Wilson loops in gluodynamics are studied within the background field formalism. The first one operates when distance between minimal surfaces of the loops is small and may be important for sea quark effects and strong decay processes. The second mechanism -- perturbative interaction in nonperturbative confining background is found to be physically dominant for all loop configurations characteristic of scattering process. It reduces to perturbative gluon exchanges at small distances, while at larger distances it corresponds to the t-channel exchange of (reggeized) glueball states. Comparison to other approaches is made and possible physical applicationsmore » are discussed.« less
  • We discuss Monte Carlo results relevant to the deconfinement order parameter and its fluctuation from the viewpoint of the dilute instanton gas approximation. We find a threshold effect in the Wilson string distribution due to instanton effects. On the basis of these data we determine a relation between the saturation temperature of the instanton gas and the confinement temperature. We also present other results of the numerical calculation.
  • Instanton effects on the Euclidean correlation function of two Wilson loops at an angle {theta}, relevant to soft high-energy dipole-dipole scattering, are calculated in the instanton liquid model and compared with the existing lattice data. Moreover, the instanton-induced dipole-dipole potential is obtained from the same correlation function at {theta}=0, and compared with preliminary lattice data.
  • We use {epsilon}-cooling, adjusting at will the order a{sup 2} corrections to the lattice action, to study the parameter space of instantons in the background of nontrivial holonomy and to determine the presence and nature of constituents with fractional topological charge at finite and zero temperature for SU(2). As an additional tool, zero-temperature configurations were generated from those at finite temperature with well-separated constituents. This is achieved by 'adiabatically' adjusting the anisotropic coupling used to implement finite temperature on a symmetric lattice. The action and topological charge density, as well as the Polyakov loop and chiral zero-modes are used tomore » analyze these configurations. We also show how cooling histories themselves can reveal the presence of constituents with fractional topological charge. We comment on the interpretation of recent fermion zero-mode studies for thermalized ensembles at small temperatures.« less