Color screening masses from string models

Andreev, Oleg

doi:10.1103/physrevd.94.126003

Cited by 11 publications

(3 citation statements)

References 46 publications

(134 reference statements)

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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: 73%

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: 73%

Thermal properties of light mesons from holography

Cao

Qiu

Liu

et al. 2021

J. High Energ. Phys.

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“…The value obtained for the glueball mass is consistent with lattice data. Other studies of screening in a non Abelian plasma using holography can be found, for example, in [30,31,[39][40][41].…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

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

Braga

Ferreira

2017

Eur. Phys. J. C

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The finite temperature spectrum of pseudo-scalar glueballs in a plasma is studied using a holographic model. The 0 −+ glueball is represented by a pseudo-scalar (axion) field living in a five dimensional geometry that comes from a solution of Einstein equations for gravity coupled with a dilaton scalar field. The spectral function obtained from the model shows a clear peak corresponding to the quasi-particle ground state. Analyzing the variation of the position of the peak with temperature, we describe the thermal behavior of the Debye screening mass of the plasma. As a check of consistency, the zero temperature limit of the model is also investigated. The glueball masses obtained are consistent with previous lattice results.

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“…[79] and applied in QCD [80][81][82][83]. There are also discussions about Debye screening masses extracted from the spatial correlation functions of CT -odd operator TrF µν F µν [84,85], pseudo-scalar glueballs [86], Polyakov loops [87]. The Deby screening mass is shown to grow linearly with T [85], consistent with the 4D studies.…”

Section: Introductionmentioning

confidence: 53%

Thermal properties of light mesons from holography

Cao,

Qiu,

Liu

et al. 2021

Preprint

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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 twoflavor (N f = 2) soft-wall AdS/QCD model. By solving the spatial correlation functions, we extract the screening masses (m scr ) from their poles. The screening masses of pseudo-scalar (pion), axial-vector (a 1 ) mesons increase (almost)monotonically with the temperature, while the screening masses of scalar (σ) and vector (ρ) mesons decrease at low temperatures and increase at high temperatures. Besides, the pole masses (m pole ) and thermal widths (Γ) are worked out from the temporal correlation functions and the corresponding spectral functions. The results indicate that the pole masses have local minimums at low temperatures and grow at high temperatures. The thermal widths grow rapidly above the chiral crossover temperature T cp , indicating the dissociation of mesons at high temperatures. Furthermore, degeneration of chiral partners (pion and σ mesons, ρ and a 1 ) above T cp are observed both from screening masses and pole masses, revealing the restoration of chiral symmetry at the spectral level. Finally, we verify numerically that the spectral functions in the temporal regime are strongly related to the quasi-normal modes with complex frequencies ω 0 = m pole − iΓ/2.

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Color screening masses from string models

Abstract: We use gauge/string duality to estimate the Debye screening mass at non-zero temperature and baryon chemical potential. We interpret this mass as the smallest one in the open string channel. Comparisons are made with the results from holography and lattice QCD.

Cited by 11 publications

References 46 publications

Thermal properties of light mesons from holography

Thermal properties of light mesons from holography

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

Thermal properties of light mesons from holography

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