Phenomenology of AdS/QCD and its gravity dual

Galow, B.; Megías, Eugenio; Nian, Jun; Pirner, H. J.

doi:10.1016/j.nuclphysb.2010.03.022

Cited by 39 publications

(66 citation statements)

References 25 publications

(92 reference statements)

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“…However, as shown in Ref. [28] the corresponding dilaton potential solved from the Einstein equation is unstable, and the corresponding beta function does not agree with the QCD beta function.…”

Section: Introductionmentioning

confidence: 94%

“…[28] to introduce the GKN framework. According to the GKN's framework, the noncritical string background dual to the QCD-like gauge theories can be described by the following action in the Einstein frame: In this subsection, the space-time metric has Minkowski signature with the sign convention (−, +, +, +, +).…”

Section: The Gkn Framework Of the Gravity Dual Theorymentioning

confidence: 99%

“…The warping of the bulk space relates the bulk coordinate z to the energy scale E(z) via the gravational blue-shift [28]. By using the radial coordinate r ∝ 1/z, the blue-shift is given by the dimensionless ratio 19) where G tt denotes the temporal component of the metric.…”

Section: The Running Coupling and The Beta Functionmentioning

confidence: 99%

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Logarithmic correction in the deformedAdS5model to produce the heavy quark potential and QCD beta function

Huang

Yan

2011

Phys. Rev. D

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We stude the holographic QCD model which contains a quadratic term −σz 2 and a logarithmic term −c 0 log[(z IR − z)/z IR ] with an explicit infrared cut-off z IR in the deformed AdS 5 warp factor. We investigate the heavy quark potential for three cases, i.e, with only quadratic correction, with both quadratic and logarithmic corrections and with only logarithmic correction. We solve the dilaton field and dilation potential from the Einstein equation, and investigate the corresponding beta function in the Gürsoy -Kiritsis-Nitti (GKN) framework. Our studies show that in the case with only quadratic correction, a negative σ or the Andreev-Zakharov model is favored to fit the heavy quark potential and to produce the QCD beta-function at 2-loop level, however, the dilaton potential is unbounded in infrared regime. One interesting observing for the case of positive σ, or the soft-wall AdS 5 model is that the corresponding beta-function exists an infrared fixed point. In the case with only logarithmic correction, the heavy quark Cornell potential can be fitted very well, the corresponding beta-function agrees with the QCD beta-function at 2-loop level reasonably well, and the dilaton potential is bounded from below in infrared. At the end, we propose a more compact model which has only logarithmic correction in the deformed warp factor and has less free parameters.

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Section: Introductionmentioning

confidence: 94%

Section: The Gkn Framework Of the Gravity Dual Theorymentioning

confidence: 99%

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Logarithmic correction in the deformedAdS5model to produce the heavy quark potential and QCD beta function

Huang

Yan

2011

Phys. Rev. D

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“…So in order to describe a confining theory, the conformal invariance of AdS 5 must be broken somehow. Two strategies AdS/QCD background have been suggested in the literatures hard-wall model [11][12][13][14][15][16] and soft-wall model [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In hard-wall model to impose confinement and discrete normalizable modes that is to truncate the regime where string modes can propagate by introducing an IR cutoff in the fifth dimension at a finite value z 0 ∼ 1 Λ QCD .…”

Section: Introductionmentioning

confidence: 99%

The effects of deformation parameter on thermal width of moving quarkonia in plasma

Sadeghi

Tahery

2015

J. High Energ. Phys.

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In general we can say that the thermal width of quarkonia corresponds to imaginary part of it's potential. Gravity dual of theories give explicit form of potential as V QQ . Since there is an explicit formula for ImV QQ one can consider different gravity duals and study the results of contribution of various parameters. Variable gravity duals of moving pair in plasma have different results for potential. Our paper shows that deformation parameter c in warp factor leads to new results that we present them for arbitrary angles of the pair with respect to it's velocity. We compare our results with the case that no deformation parameter is in metric background. We will see that the thermal width of the pair increases with increasing deformation parameter. Also, for nonzero values of deformation parameter the pair feels moving plasma in all distances. In addition our results indicate that contribution of deformation parameter leads to larger dissociation length for the moving pair reverse to the effect of the pair's velocity in the plasma.

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“…The core of the bottom-up scenario is to find a reasonable non-conformal metric of the AdS 5 space which mimics the physical properties of QCD, see e.g. [8][9][10]. In this work we use this approach, and explore the thermodynamics of a simple holographic model based on 5D Einstein-dilaton gravity with a massive scalar field.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of Resonant Scalars in AdS/CFT and implications for QCD

Megías

Valle

2016

EPJ Web Conf.

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Abstract. We explore the thermodynamics of a simple 5D Einstein-dilaton gravity model with a massive scalar field, with asymptotically AdS behavior in the UV. The holographic renormalization is addressed in details, and analytical results are obtained at high temperatures. We study the power corrections predicted by the model, and compare with lattice data in the deconfined phase of gluodynamics. Finally, it is discussed the role played by the conformal anomaly for integer values of the dimension of the condensate dual to the scalar field.

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Phenomenology of AdS/QCD and its gravity dual

Cited by 39 publications

References 25 publications

Logarithmic correction in the deformedAdS5model to produce the heavy quark potential and QCD beta function

Logarithmic correction in the deformedAdS5model to produce the heavy quark potential and QCD beta function

The effects of deformation parameter on thermal width of moving quarkonia in plasma

Thermodynamics of Resonant Scalars in AdS/CFT and implications for QCD

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