Unquenched gluon propagator in Landau gauge

3. The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)' web home page or employer's website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)' and/or the employer's use for educational or research purposes." th June 2013Role of center vortices in chiral symmetry breaking in SU (3) We study the behavior of the AsqTad quark propagator in Landau gauge on SU(3) Yang-Mills gauge configurations under the removal of center vortices. In SU(2) gauge theory, center vortices have been observed to generate chiral symmetry breaking and support the infrared behavior of the quark propagator. In contrast, we report a weak dependence on the vortex content of the SU(3) gauge configurations, including the survival of dynamical mass generation on configurations with vanishing string tension.

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“…[28][29][30]. The same picture was found in full QCD with light sea quarks [30,48]. Also shown in Fig.…”

Section: The Influence Of Center Vorticessupporting

confidence: 60%

Role of center vortices in chiral symmetry breaking in SU(3) gauge theory

et al. 2011

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“…We have extended a previous lattice study [24] of the Landau-gauge gluon propagator in full QCD to a finer lattice. The addition of quark loops has a clear, quantitative effect on the gluon propagator, but its basic features are unaltered.…”

Section: Discussionmentioning

confidence: 99%

“…Note that in Ref. [24] a small quantitative difference has been observed by studying a slightly greater range of masses (the heaviest had 4 times the mass of the lightest). It would be interesting to study the gluon propagator with heavier sea-quarks so that the transition between quenched and full QCD could be observed.…”

Section: A the Effects Of Dynamical Sea-quarksmentioning

confidence: 99%

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Scaling behavior and positivity violation of the gluon propagator in full QCD

et al. 2007

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The Landau-gauge gluon propagator is studied using the coarse and fine dynamical MILC configurations. The effects of dynamical quarks are clearly visible and lead to a reduction of the nonperturbative infrared enhancement relative to the quenched case. Lattice spacing effects are studied and found to be small. The gluon spectral function is shown to clearly violate positivity in both quenched and full QCD.

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“…(2). Solving the DSE starting by imposing new renormalization conditions, namely B(p 2 , ξ) and A(p 2 , ξ), in Eq.…”

Section: Discussionmentioning

confidence: 99%

Exciting flavored bound states

2014

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We study ground and radial excitations of flavor singlet and flavored pseudoscalar mesons within the framework of the rainbow-ladder truncation using an infrared massive and finite interaction in agreement with recent results for the gluon-dressing function from lattice QCD and DysonSchwinger equations. Whereas the ground-state masses and decay constants of the light mesons as well as charmonia are well described, we confirm previous observations that this truncation is inadequate to provide realistic predictions for the spectrum of excited and exotic states. Moreover, we find a complex conjugate pair of eigenvalues for the excited D (s) mesons, which indicates a nonHermiticity of the interaction kernel in the case of heavy-light systems and the present truncation. Nevertheless, limiting ourselves to the leading contributions of the Bethe-Salpeter amplitudes, we find a reasonable description of the charmed ground states and their respective decay constants.

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Unquenched gluon propagator in Landau gauge

Cited by 165 publications

References 28 publications

Role of center vortices in chiral symmetry breaking in SU(3) gauge theory

Role of center vortices in chiral symmetry breaking in SU(3) gauge theory

Scaling behavior and positivity violation of the gluon propagator in full QCD

Exciting flavored bound states

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