Thermal spectrum of pseudo-scalar glueballs and Debye screening mass from holography

Braga, Nelson R. F.; Ferreira, Luiz F.

doi:10.1140/epjc/s10052-017-5232-8

Cited by 8 publications

(8 citation statements)

References 43 publications

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“…[82] and applied in holographic QCD [83][84][85][86]. There are also discussions about Debye screening masses extracted from the spatial correlation functions of CT -odd operator TrF µνF µν [87,88], the pseudo-scalar glueballs [89] and the Polyakov loops [90]. The Debye screening mass is shown to increase linearly with T [88], which is consistent with the 4D studies.…”

Section: Introductionsupporting

confidence: 72%

Thermal properties of light mesons from holography

Cao

Qiu

Liu

et al. 2021

J. High Energ. Phys.

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The thermal properties of light mesons, including the temperature dependence of their masses (both screening and pole masses) and thermal widths, are studied in a two-flavor (Nf = 2) soft-wall AdS/QCD model. By solving the spatial correlation functions, we extract the screening masses (mscr) from their poles. The screening masses of pseudo-scalar (π) and axial-vector (a1) mesons increase almost monotonously with the increase of temperature. The screening masses of scalar (σ) and vector (ρ) mesons decrease at low temperature and increase at high temperature. The pole masses (mpole) and the thermal widths (Γ) are extracted from the temporal correlation functions and the corresponding spectral functions. The results indicate that the pole masses have local minima at low temperature and increase at high temperature. The thermal widths increase rapidly above the chiral crossover temperature Tcp, indicating the dissociations of mesons at high temperature. Furthermore, the degeneration of the chiral partners (π and σ, ρ and a1) above Tcp is observed from the screening and pole masses, revealing the chiral symmetry restoration at the hadronic spectrum level. Finally, we numerically verify that the spectral functions in the temporal regime are strongly related to the quasi-normal modes with complex frequencies ω0 = mpole− iΓ/2.

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Section: Introductionsupporting

confidence: 72%

Thermal properties of light mesons from holography

Cao

Qiu

Liu

et al. 2021

J. High Energ. Phys.

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“…Here we have found the approximate expressions of glueball energies ω (1) and ω (3) by considering the sub-leading order terms upto O(ω 0 ) and O(ω −2 ) respectively, starting from the leading order O(ω) on the left-hand-side of (8). Now the energy or mass ratio of the first exited state to the ground state are ω (1) * /ω (1) = 1.60371 and ω (3) * /ω (3) = The Lattice calculation has found this ratio 1.4602 [21], where m −+ = 2.477GeV and m * −+ = 3.617GeV. So for the second approximation ω (3) , the holographic result gets better accuracy.…”

mentioning

confidence: 96%

“…Also the d + 1 dimensional gravity background should not have the SO(d, 2) symmetry, so that the corresponding (d − 1) + 1 dimensional gauge theory is non-conformal which ensures the existence of a Λ QCD -like fixed point. Considering these two properties of QCD, there are few empirical models to study the glueballs in the holographic QCD [15,[19][20][21]. But those models are not directly connected to the ten dimensional supergravity or superstring theory.…”

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confidence: 99%

Finite temperature $0^{-+}$ glueball spectrum from non-susy D3 brane of Type IIB string theory

Nayek,

Roy

2021

Preprint

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Here, we calculate the pseudo-scalar glueball mass at finite temperature from the holographic QCD in 3 + 1 dimensions. The decoupled geometry of the non-supersymmetric (non-susy) D3 brane at the finite temperature which is the solution of the type-II supergravity is considered as the dual theory of QCD. We calculate the mass spectrum from the axion fluctuation in this gravity background using WKB approximations. Approximating the WKB equation for various orders of mass, we derive the analytical expressions of the mass spectrum of 0 −+ at the finite temperature. Finally we evaluate the masses numerically as m−+ = 2.5GeV and m * −+ = 3.8GeV from the complete WKB equation. The mass of a given state is found to decrease with increasing temperature and becomes zero at confinement -deconfinement transition temperature which is consistent with the idea of deconfinement and also matches with some recent lattice results. From this temperature variation, the QCD transition point is found to be about 186MeV.

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“…Thus, in the following we have studied the graviton spectrum when a BH background is considered in order to describe the mass dependence on the temperature of the environment and compare the new result with the previous calculations. We recall that much research has been carried out to determine the deconfinement temperature and the behaviour of the glueball and meson spectra after the phase transition [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Glueballs at high temperature within the hard-wall holographic model

Rinaldi

Vento

2022

Eur. Phys. J. C

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In this investigation an holographic description of the deconfined phase transition of scalar and tensor glueballs is presented within the so called hard-wall model. The spectra of these bound states of gluons have been calculated from the linearized Einstein equations for a graviton propagating from a thermal $$AdS_5$$ A d S 5 space to an AdS Black-Hole. In this framework, the deconfined phase is reached via a two steps mechanism. We propose that the transition between the AdS thermal sector to the BH is described via a first order phase transition, with discontinuous masses at the critical temperature, which has been determined by Herzog’s method of regulating the free energy densities. Then, the glueball masses diverge with increasing T in the BH phase and thus lead to deconfined states à la Hagedorn.

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Thermal spectrum of pseudo-scalar glueballs and Debye screening mass from holography

Cited by 8 publications

References 43 publications

Thermal properties of light mesons from holography

Thermal properties of light mesons from holography

Finite temperature $0^{-+}$ glueball spectrum from non-susy D3 brane of Type IIB string theory

Glueballs at high temperature within the hard-wall holographic model

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