The Witten-Sakai-Sugimoto model: A brief review and some recent results

Rebhan, Anton

doi:10.1051/epjconf/20159502005

Cited by 49 publications

(59 citation statements)

References 102 publications

(177 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the D4-brane construction in Witten's [30], a concrete model was proposed by Sakai and Sugimoto [31,32] which almost contains all necessary ingredients of QCD e.g. baryons [33,34], quark matter, chiral/deconfinement phase transitions [35,36,37,38], glueball spectrum and interaction [39,40,41,42,43]. Specifically, flavors are introduced into this model by a stack of N f pairs of suitable D8/D8-branes as probes embedded in the N c D4branes background.…”

Section: Introductionmentioning

confidence: 99%

Holographic heavy baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background

2017

Phys. Rev. D

View full text Add to dashboard Cite

We extend the holographic analysis of light-baryon spectrum in [50] to the case involving the heavy flavors. With the construction of the Witten-Sakai-Sugimoto model in the D0-D4 background, we use the mechanism proposed in [59,60,61] by including two light and one heavy flavor branes, to describe the heavy-light baryons as heavy mesons bound to a flavor instanton. The background geometry of this model corresponds to an excited state in the dual field theory with nonzero glue condensate TrF ∧ F = 8π 2 N cκ , or equivalently a θ angle, which is proportional to the number density of the D0-brane charge. At strongly coupled limit, this model shows that the heavy meson is always bound in the form of the zero mode of the flavor instanton in the fundamental representation. We systematically study the quantization for the effective Lagrangian of heavy-light baryons by employing the soliton picture, and derive the mass spectrum of heavy-light baryons in the situation with singleand double-heavy baryon. We find the difference in the mass spectrum becomes smaller if the density of D0-brane charge increases and the constraint of stable states of the heavylight baryons is 1 < b < 3. It indicates that baryon can not stably exist for sufficiently large density of D0 charge which is in agreement with the conclusions in the previous study of this model.

show abstract

Section: Introductionmentioning

confidence: 99%

Holographic heavy baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background

2017

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…In spite of this limitation, experience shows that for many quantities the unwanted modes only generate small corrections, allowing many properties of the model to be in close quantitative agreement with properties of QCD [179,196]. A useful review can be found in [200].…”

Section: Holographic Qcd: the Sakai-sugimoto Modelmentioning

confidence: 99%

QCD, with strings attached

Güijosa

2016

Int. J. Mod. Phys. E

View full text Add to dashboard Cite

In the nearly twenty years that have elapsed since its discovery, the gauge-gravity correspondence has become established as an efficient tool to explore the physics of a large class of strongly-coupled field theories. A brief overview is given here of its formulation and a few of its applications, emphasizing attempts to emulate aspects of the strong-coupling regime of quantum chromodynamics (QCD). To the extent possible, the presentation is self-contained, and in particular, it does not presuppose knowledge of string theory.

show abstract

“…We start with a very brief description of the model, to establish the notation and the action to which we add the quark mass correction. More detailed accounts of the Witten-Sakai-Sugimoto model can be found in the original works [1,2] and in the review [33]. The model is based on a type-IIA string theory background generated by a large number N c of D4-branes extended over the directions (x 0 , x, x 4 ), where (x 0 , x) are the 4d space-time directions.…”

Section: Brief Introduction To the Model And Dirac-born-infeld Actionmentioning

confidence: 99%

Heavy holographic QCD

Kovensky

Schmitt

2020

J. High Energ. Phys.

View full text Add to dashboard Cite

We study the phase structure of the Witten-Sakai-Sugimoto model in the plane of temperature and baryon chemical potential, including the effect of a nonzero current quark mass. Our study is performed in the decompactified limit of the model, which, at least regarding the chiral phase transition, appears to be closer to real-world QCD than the original version. Following earlier studies, we account for the quark mass in an effective way based on an open Wilson line operator whose expectation value is identified with the chiral condensate. We find that the quark mass stabilizes a configuration with string sources and point out that this phase plays an important role in the phase diagram. Furthermore, we show that the quark mass breaks up the first-order chiral phase transition curve and introduces critical points to the phase diagram. Similarities of the phase structure to other holographic approaches and to lattice simulations of "heavy QCD" are found and discussed. By making holographic QCD more realistic, our results open the door to a better understanding of real-world strongly coupled hot and dense matter.

show abstract

The Witten-Sakai-Sugimoto model: A brief review and some recent results

Cited by 49 publications

References 102 publications

Holographic heavy baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background

Holographic heavy baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background

QCD, with strings attached

Heavy holographic QCD

Contact Info

Product

Resources

About