Holographic glueballs and infrared wall driven by dilaton

Ghoroku, Kazuo; Kubo, Kouki; Taminato, Tomoki; Toyoda, Fumihiko

doi:10.1007/jhep04(2012)087

Cited by 2 publications

(3 citation statements)

References 48 publications

(108 reference statements)

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“…The glueball has been studied in the holographic QCD models [92][93][94][95]. The scalar glueball G is associated with the local gauge-invariant QCD operator tr(G µν G µν ) defined on the boundary spacetime, which has dimension ∆ G = 4.…”

Section: Scalar Glueball Spectrum In Quenched Dynamical Soft-wall Modelmentioning

confidence: 99%

Dynamical holographic QCD model for glueball and light meson spectra

Huang

2013

J. High Energ. Phys.

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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Section: Scalar Glueball Spectrum In Quenched Dynamical Soft-wall Modelmentioning

confidence: 99%

Dynamical holographic QCD model for glueball and light meson spectra

Huang

2013

J. High Energ. Phys.

133

112

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“…We call the 4D slice, which is cut at r = r D in the bulk, as a domain wall since the open string configuration introduced to calculate the string tension as above are prevented to penetrate this wall [39,10]. Then the bulk is separated by this wall to two regions in the case of 0 < b 0 < r 0 as shown in the Fig.…”

Section: Domain Wallmentioning

confidence: 99%

“…So we consider here an alternative method to find the glueball spectra. The most popular and convenient one is the WKB method which has been used by many people [18]- [24], [39] . b 0 = 0 case First, we perform this method to obtain the mass for the case of C = 0, then its results are compared with the one given in the previous section to assure that this approximation is good.…”

Section: Glueball (Normalizable) Solutionmentioning

confidence: 99%

Glueball instability and thermalization driven by dark radiation

et al. 2014

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We study glueballs in the holographic gauge theories living in a curved space-time. The dual bulk is obtained as a solution of the type IIB superstring theory with two parameters, which correspond to four dimensional (4D) cosmological constant λ and the dark radiation C respectively. The theory is in the confining phase for λ < 0 and small C, then we observe stable glueball states in this theory. However, the stability of the glueball states is lost when the density of the dark radiation (C) increases and exceeds a critical point. Above this point, the dark radiation works as the heat bath of the Yang-Mills theory since the event horizon appears. Thus the system is thermalized, and the theory is in a finite temperature deconfinement phase, namely in the QGP phase. We observe this transition process through the glueball spectra which varies dramatically with C. We also examined the entanglement entropy of the system to find a clue of this phase transition and the role of the dark radiation C in the entanglement entropy.

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Holographic glueballs and infrared wall driven by dilaton

Cited by 2 publications

References 48 publications

Dynamical holographic QCD model for glueball and light meson spectra

Dynamical holographic QCD model for glueball and light meson spectra

Glueball instability and thermalization driven by dark radiation

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