Photoemission rate of strongly interacting quark-gluon plasma at finite density

Jo, Kwanghyun; Sin, Sang-Jin

doi:10.1103/physrevd.83.026004

Cited by 13 publications

(14 citation statements)

References 37 publications

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“…Our results are quite different from those of Ref. [14] which takes the RN-AdS black hole geometry as the gravity dual of QCD and embeds the baryon charge density in the black hole charge.…”

Section: Soft-wall Ads/qcd Modelcontrasting

confidence: 99%

“…This can also be seen explicitly from plots later in this paper (Figs. 5,8,11,and 14). This proves the claim in Ref.…”

Section: D4/d6 Modelsupporting

confidence: 87%

“…[12]. Some references [9,13,14] also studied photoemission rate at finite charge density. All of these works have seen some common features of photoproduction from QCD-like plasma, which suggests that AdS/CFT correspondence can be thought of as a useful tool in describing universal properties of strongly coupling regime of QCD plasma.…”

Section: Introductionmentioning

confidence: 99%

“…The models based on black D3-brane geometry (or AdS 5 black hole) is conformal and cannot catch the running behavior of strong interaction described by QCD, the quark mass is zero in the Sakai-Sugimoto model, the density in Ref. [14] is from the adjoint sector and should be different from the baryon density. The last drawback is that the models based on 10-dimensional supergravity geometry has the unwanted internal space and results in Kaluza-Klein (KK) modes in the dual QCD (of the same energy scale of hadron spectra), which has no correspondence in QCD phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…Note in this work we introduce the baryon charge density using nonlinear DBI action and therefore takes into account of nonlinear effect, which is different from R-charge AdS black hole studied in Ref,[14].…”

mentioning

confidence: 99%

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Photoproduction and conductivity in dense holographic QCD

2012

Phys. Rev. D

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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.

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Section: Soft-wall Ads/qcd Modelcontrasting

confidence: 99%

“…This can also be seen explicitly from plots later in this paper (Figs. 5,8,11,and 14). This proves the claim in Ref.…”

Section: D4/d6 Modelsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Photoproduction and conductivity in dense holographic QCD

2012

Phys. Rev. D

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More on thermal probes of a strongly coupled anisotropic plasma

Jahnke

Luna

Patiño

et al. 2014

J. High Energ. Phys.

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Abstract:We extend the analysis of arXiv:1211.2199, where the photon production rate of an anisotropic strongly coupled plasma with N f N c massless quarks was considered. We allow here for non-vanishing quark masses and study how these affect the spectral densities and conductivities. We also compute another important probe of the plasma, the dilepton production rate. We consider generic angles between the anisotropic direction and the photon and dilepton wave vectors, as well as arbitrary quark masses and arbitrary values of the anisotropy parameter. Generically, the anisotropy increases the production rate of both photons and dileptons, compared with an isotropic plasma at the same temperature.

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Thermal photon production in a strongly coupled anisotropic plasma

Patiño

Trancanelli

2013

J. High Energ. Phys.

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We calculate the DC conductivity tensor of strongly coupled N = 4 super-Yang-Mills (SYM) plasma in a presence of a strong external magnetic field B T 2 by using its gravity dual and employing both the RG flow approach and membrane paradigm which give the same results. We find that, since the magnetic field B induces anisotropy in the plasma, different components of the DC conductivity tensor have different magnitudes depending on whether its components are in the direction of the magnetic field B. In particular, we find that a component of the DC conductivity tensor in the direction of the magnetic field B increases linearly with B while the other components (which are not in the direction of the magnetic field B) are independent of it. These results are consistent with the lattice computations of the DC conductivity tensor of the QCD plasma in an external magnetic field B. Using the DC conductivity tensor, we calculate the soft or low-frequency thermal photon and dilepton production rates of the strongly coupled N = 4 SYM plasma in the presence of the strong external magnetic field B T 2. We find that the strong magnetic field B enhances both the thermal photon and dilepton production rates of the strongly coupled N = 4 SYM plasma in a qualitative agreement with the experimentally observed enhancements at the heavy-ion collision experiments.

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Photoemission rate of strongly interacting quark-gluon plasma at finite density

Cited by 13 publications

References 37 publications

Photoproduction and conductivity in dense holographic QCD

Photoproduction and conductivity in dense holographic QCD

More on thermal probes of a strongly coupled anisotropic plasma

Thermal photon production in a strongly coupled anisotropic plasma

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