Spectral function and quark diffusion constant in non-critical holographic QCD

Bu, Yan Yan; Yang, Jin Min

doi:10.1016/j.nuclphysb.2011.10.023

Cited by 7 publications

(2 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The QCD-like chiral phase transition, flavor quark transport and parton structure function have been discussed in Refs. [23][24][25][26][27] under this framework. The findings in these references indicate that the thermal phase transition and flavor quark transport under noncritical background is nearly the same as those of the Sakai-Sugimoto model.…”

Section: Noncritical Sakai-sugimoto Modelmentioning

confidence: 98%

See 1 more Smart Citation

Photoproduction and conductivity in dense holographic QCD

2012

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We explore the photoemission rate and conductivity in dense QCD by taking the AdS/CFT methods. Specifically, we take three QCD gravity dual models to do comparative studies: D4/D6 model, noncritical Sakai-Sugimoto model and soft-wall AdS/QCD model. We turn on the time component of flavor U(1) gauge field in the bulk side to model the baryon density in QCD. For all three models, we numerically solve the U(1) fluctuation equation to plot the spectral function and photoemission rate for lightlike momenta as well as the AC conductivity. We find that the results for the former two models are very similar to previous studies while the last one show some differences. The conductivity in the soft-wall model seems to be similar to that of holographic superconductor constructed from five-dimensional bulk gravity, i.e. the pseudogap structure. This should be owing to that the infrared (IR) soft-wall (an effective cutoff near the IR of the geometry) produces a mass gap in the dual field theory, which has imprinting in the conductivity as a pseudogap formation. However, the DC conductivity in our computations is finite while it should be a delta peak in holographic superconductor models. Our results show the importance of dilaton running in affecting physical quantities.

show abstract

Section: Noncritical Sakai-sugimoto Modelmentioning

confidence: 98%

“…In what follows we will briefly review the model and follow the conventions of Ref. [26]. The supergravity solution for AdS 6 black hole is…”

Section: Noncritical Sakai-sugimoto Modelmentioning

confidence: 99%

Photoproduction and conductivity in dense holographic QCD

2012

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

show abstract

Thermal mass spectra of vector and axial-vector mesons in predictive soft-wall AdS/QCD model

Cui¹,

Takeuchi²,

Wu³

2012

J. High Energ. Phys.

View full text Add to dashboard Cite

We extend the predictive soft-wall AdS/QCD model to a thermodynamic model by considering the black hole metric. A modified bulk vacuum expectation value and a modified coefficient for the quartic term in the bulk scalar potential are introduced to obtain a smooth dilaton solution for computing the spectral functions of the vector and axial-vector mesons. It is demonstrated that the peaks appearing in the spectral functions characterize the thermal mass spectra of vector and axialvector mesons, where the location of the peak moves to a lower value and the width of the peak becomes wider when increasing the temperature. We observe that the peak disappears completely at the critical temperature around T c = 200 MeV, which implies the deconfinement of quark and the restoration of chiral symmetry breaking. A numerical study by fitting the spectral function in terms of the Breit-Wigner form has been made to show how the peak dissolves quantitatively when the temperature is increased to the critical point.

show abstract

Diffusion Constant and Shear Viscosity in the Charged 3D Hairy Black Hole

Naji

2014

Int J Theor Phys

View full text Add to dashboard Cite

Spectral function and quark diffusion constant in non-critical holographic QCD

Cited by 7 publications

References 108 publications

Photoproduction and conductivity in dense holographic QCD

Photoproduction and conductivity in dense holographic QCD

Thermal mass spectra of vector and axial-vector mesons in predictive soft-wall AdS/QCD model

Diffusion Constant and Shear Viscosity in the Charged 3D Hairy Black Hole

Contact Info

Product

Resources

About