Thermal properties of light mesons from holography

Cao, Xuanmin; Qiu, Songyu; Liu, Hui; Li, Danning

doi:10.1007/jhep08(2021)005

Cited by 17 publications

(13 citation statements)

References 98 publications

(161 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In conclusion, increasing the temperature and the chemical potential the melting process speeds out. It is also interesting pointing out that these results are qualitatively equivalents to results obtained within the bottom-up holographic QCD models in the literature [22,23,25,[29][30][31][32][33]54], see also references therein. The difference of our results in relation to those is that the background we are working with was obtained solving the Einstein-Maxwell-Dilaton equations.…”

Section: The Effective Potentialsupporting

confidence: 78%

Melting of heavy vector mesons and quasinormal modes in a finite density plasma from holography

Mamani,

Hou,

Braga

2022

Preprint

View full text Add to dashboard Cite

In this work, we investigate the melting of charmonium states within a holographic QCD model in the context of Einstein-Maxwell-Dilaton (EMD) theory. In the dual field theory, the model describes the heavy mesons inside a finite temperature and density medium. First, we calculate the spectrum at zero temperature. Then, at finite temperature, we obtain the spectral functions, where the heavy vector meson are represented by peaks. We show that the charmonium melts down at temperatures above the confinement/deconfinement temperature of the quark-gluon plasma. We also observe that the chemical potential speeds up the melting process. This finding is in agreement with results previously reported in the literature. In the gravitational side of the theory we solve the perturbation equations in the hydrodynamics limit. From this result we read off the diffusion coefficient by comparing the dispersion relation against the corresponding result obtained in the dual field theory. We also investigate the behavior of the diffusion coefficient as a function of the temperature. The perturbation equations are solved numerically, in order to get the quasinormal frequencies. We report the emergence of a new mode whose real part increases rapidly at a certain value of the chemical potential while its imaginary part decreases with the increasing of the chemical potential. Finally, by comparing against results obtained in the conformal plasma, we observe that the real part of the frequency increases, while the imaginary part decreases when we consider the non-conformal plasma.

show abstract

Section: The Effective Potentialsupporting

confidence: 78%

Melting of heavy vector mesons and quasinormal modes in a finite density plasma from holography

Mamani,

Hou,

Braga

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…As proved in Ref. [55,72], when N f = 2, the second-order transition point (critical point) appears only in the chiral limit. Therefore, we will focus on the two flavor case with zero quark mass to study the phenomena near critical point.…”

Section: Thermalizationmentioning

confidence: 70%

“…Those equilibrium critical exponents, β, δ and ν, have been obtained numerically and analytically in the previous Refs. [55,72]. However, to describe the evolution of thermalization, 1 The relaxation time also is a function of finite quark mass and other external parameters an additional dynamic critical exponent z is required.…”

Section: Critical Slowing Downmentioning

confidence: 99%

“…In the bottom-up approach, the soft-wall AdS/QCD model proposed in Ref. [47] does provide an effective scenario to consider light meson spectrum [48][49][50][51][52][53][54][55][56][57][58][59][60][61], as well as the chiral phase transition [62][63][64][65][66][67][68][69][70][71]. Thus, we will take the soft-wall model as our start point.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermalization and prethermalization in the soft-wall AdS/QCD model

Cao¹,

Chao²,

Liu³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The real-time dynamics of chiral phase transition is investigated in a twoflavor (N f = 2) soft-wall AdS/QCD model. To understand the dynamics of thermalization, we quench the system from initial states deviating from the equilibrium states. Then, we solve the nonequilibrium evolution of the order parameter (chiral condensate σ ≡ qq ). It is shown that the system undergoes an exponential relaxation at temperatures away from the critical temperature T c . The relaxation time diverges at T c , presenting a typical behavior of critical slowing down. Numerically, we extract the dynamic exponent z, and get z ≈ 2 by fitting the scaling behavior σ t −β/(νz) , where the mean-field equilibrium critical exponents (β = 1/2, ν = 1/2 and δ = 3) have been applied. More interestingly, it is remarked that, for a large class of initial states, the system would linger over a quasisteady state for a certain period of time before the thermalization. It is suggested that the interesting phenomenon, known as prethermalization, has been observed in the framework of holographic models. In such prethermal stage, we verify that the system is characterized by a universal dynamical scaling law and described by the initial-slip exponent θ = 0.

show abstract

“…Namely, the screening masses of them become degenerate when the chiral symmetry gets restored. Hence, the temperature dependence of meson screening masses at vanishing magnetic field has been investigated in the NJLtype models [102][103][104][105][106], in holography QCD [107] and in LQCD [108][109][110][111]. But when a magnetic field is applied, there were only several papers [64,65,70,75] that explored the influence of magnetic fields on the screening masses of mesons in the hot medium.…”

Section: Introductionmentioning

confidence: 99%

Impacts of (inverse) magnetic catalysis on screening masses of neutral pions and sigma mesons in hot and magnetized quark matter

Sheng,

Wang,

2021

Preprint

View full text Add to dashboard Cite

We investigate the screening masses of neutral pions and sigma mesons in hot and magnetized quark matter in the framework of a two-flavor lattice-improved Nambu-Jona-Lasinio (NJL) model with a magnetic field dependent coupling constant, which is determined by utilizing the results from lattice QCD simulations. Since such model can well reproduce inverse magnetic catalysis (IMC), by comparing with the standard NJL model, we systemically analyze the impacts of IMC on the temperature and magnetic field dependences of the longitudinal and transverse screening masses of the chiral partners, i.e. π 0 and σ mesons, as well as the screening mass differences between them. Particularly, it is found that the eB dependences of two alternative (pseudo)critical temperatures for the chiral transition defined by σ − π 0 meson screening mass differences are consistent with that defined by the quark condensate.

show abstract

Thermal properties of light mesons from holography

Cited by 17 publications

References 98 publications

Melting of heavy vector mesons and quasinormal modes in a finite density plasma from holography

Melting of heavy vector mesons and quasinormal modes in a finite density plasma from holography

Thermalization and prethermalization in the soft-wall AdS/QCD model

Impacts of (inverse) magnetic catalysis on screening masses of neutral pions and sigma mesons in hot and magnetized quark matter

Contact Info

Product

Resources

About