Electric and magnetic screenings of gluons in a model with a dimension-2 gluon condensate

Xu, Fukun; Huang, Mei

doi:10.1088/1674-1137/37/1/014103

Cited by 4 publications

(6 citation statements)

References 90 publications

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“…6 We mention that our results seem to 6 One should keep in mind though that the rapid variation observed in lattice calculations is still poorly under control and agree qualitatively with those of [52] although a direct comparison is difficult because these authors do not plot the temperature dependence of the Debye mass. The present results are consistent with the view that the electric gluon correlator and, in particular, the Debye mass might be sensitive to the existence of long range correlations near the transition temperature [44,45,57]. Near a second order or weak first order phase transition, one expects critical fluctuations of some order parameter to play an important role.…”

Section: Discussionsupporting

confidence: 91%

“…A more refined treatment would imply taking into account the effect of a possible order parameter of the transition, such as the Polyakov loop. For instance, functional renormalization group studies [33,55,56] suggest that one should indeed take into account a possible nontrivial A 0 background, see also [57]. We plan to implement this possibility in the present perturbative framework in a future work.…”

Section: Introductionmentioning

confidence: 99%

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Yang-Mills correlators at finite temperature: A perturbative perspective

et al. 2014

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We consider the two-point correlators of Yang-Mills theories at finite temperature in the Landau gauge. We employ a model for the corresponding Yang-Mills correlators based on the inclusion of an effective mass term for gluons. The latter is expected to have its origin in the existence of Gribov copies. One-loop calculations at zero temperature have been shown to agree remarkably well with the corresponding lattice data. We extend on this and perform a one-loop calculation of the Matsubara gluon and ghost two-point correlators at finite temperature. We show that, as in the vacuum, an effective gluon mass accurately captures the dominant infrared physics for the magnetic gluon and ghost propagators. It also reproduces the gross qualitative features of the electric gluon propagator. In particular, we find a slight nonmonotonous behavior of the Debye mass as a function of temperature, however not as pronounced as in existing lattice results. A more quantitative description of the electric sector near the deconfinement phase transition certainly requires another physical ingredient sensitive to the order parameter of the transition.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Yang-Mills correlators at finite temperature: A perturbative perspective

et al. 2014

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“…The Φ 2 (z) dilatonic field in Eq. (21), at the UV regime behaves as lim z→0 Φ 2 (z) = µ 4 G 2 z 4 , being dual to a gluon condensate that has dimension-4 [54]. At the IR regime, lim z→∞ Φ 2 (z) = µ 2 G z 2 .…”

Section: Two Flavor Soft Wall Ads/qcd In Graviton-dilaton-gluon mentioning

confidence: 99%

Informational entropic Regge trajectories of meson families in AdS/QCD

Bernardini

Rocha

2018

Phys. Rev. D

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Bulk mesons propagating in chiral and gluon condensates, in a gravity background, are scrutinized in holographic soft wall AdS/QCD models, involving deformed dilatonic backgrounds. The configurational entropy of the a1 axial vector, the ρ vector, and the f0 scalar meson families is then computed. Two types of informational entropic Regge trajectories are then obtained, where the logarithm of the mesons configurational entropy is expressed in terms of both the experimental meson mass spectra and their excitation number as well. Therefore the mass spectra of the next generation of elements in each meson family, besides being predicted as eigenvalues of Schrödinger-like equations, are estimated with better accuracy and discussed.

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“…For example, the gauge invariant dimension-4 gluon condensate g 2 G 2 has been widely investigated in both QCD sum rules and lattice calculations [57][58][59], and the non-vanishing value of the condensate does not signal the breaking of any symmetry directly, but rather the non-perturbative dynamics of strongly interacting gluon fields. In last decade, there have been growing interests in dimension-2 gluon condensates g 2 A 2 in SU(N c ) gauge theory and its possible relation to confinement [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76].…”

Section: Pure Gluon System: Quenched Dynamical Soft-wall Holographic mentioning

confidence: 99%

Dynamical holographic QCD model for glueball and light meson spectra

Huang

2013

J. High Energ. Phys.

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133

112

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In this work, we offer a dynamical soft-wall model to describe the gluodynamics and chiral dynamics in one systematical framework. We firstly construct a quenched dynamical holographic QCD (hQCD) model in the graviton-dilaton framework for the pure gluon system, then develop a dynamical hQCD model for the two flavor system in the graviton-dilaton-scalar framework by adding light flavors on the gluodynamical background. For two forms of dilaton background field $\Phi=\mu_G^2z^2$ and $\Phi=\mu_G^2z^2\tanh(\mu_{G^2}^4z^2/\mu_G^2)$, the quadratic correction to dilaton background field at infrared encodes important non-perturbative gluodynamics and naturally induces a deformed warp factor of the metric. By self-consistently solving the deformed metric induced by the dilaton background field, we find that the scalar glueball spectra in the quenched dynamical model is in very well agreement with lattice data. For two flavor system in the graviton-dilaton-scalar framework, the deformed metric is self-consistently solved by considering both the chiral condensate and nonperturbative gluodynamics in the vacuum, which are responsible for the chiral symmetry breaking and linear confinement, respectively. It is found that the mixing between the chiral condensate and gluon condensate is important to produce the correct light flavor meson spectra. The pion form factor and the vector couplings are also investigated in the dynamical hQCD model. Besides, we give the criteria for the existence of linear quark potential from the metric structure, and show a negative quadratic dilaton background field is not favored in the graviton-dilaton framework.Comment: 49 pages, 23 figures, version accepted by JHE

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Electric and magnetic screenings of gluons in a model with a dimension-2 gluon condensate

Cited by 4 publications

References 90 publications

Yang-Mills correlators at finite temperature: A perturbative perspective

Yang-Mills correlators at finite temperature: A perturbative perspective

Informational entropic Regge trajectories of meson families in AdS/QCD

Dynamical holographic QCD model for glueball and light meson spectra

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