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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nonhydrodynamic quasinormal modes and equilibration of a baryon dense holographic QGP with a critical point

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Rougemont, Romulo [1] ; Critelli, Renato [2] ; Noronha, Jorge [2]
Total Authors: 3
[1] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ Lagoa Nova, BR-59078970 Natal, RN - Brazil
[2] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Physical Review D; v. 98, n. 3 AUG 30 2018.
Web of Science Citations: 4

We compute the homogeneous limit of nonhydrodynamic quasinormal modes (QNMs) of a phenomenologically realistic Einstein-Maxwell-Dilaton (EMD) holographic model for the quark-gluon plasma (QGP) that is able to i) quantitatively describe state-of-the-art lattice results for the QCD equation of state and higher-order baryon susceptibilities with 2 + 1 flavors and physical quark masses up to the highest values of the baryon chemical potential currently reached in lattice simulations, ii) describe the nearly perfect fluidity of the strongly coupled QGP produced in ultrarelativistic heavy-ion collisions, and iii) give a very good description of the bulk viscosity extracted via some recent Bayesian analyses of hydrodynamical descriptions of heavy-ion experimental data. This EMD model has been recently used to predict the location of the QCD critical point in the QCD phase diagram, which was found to be within the reach of upcoming low-energy heavy-ion collisions. The lowest quasinormal modes of the SO(3) rotationally invariant quintuplet, triplet, and singlet channels evaluated in the present work provide upper bounds for characteristic equilibration times describing how fast the dense medium returns to thermal equilibrium after being subjected to small disturbances. We find that the equilibration times in the different channels approach each other at high temperatures, but they are well separated at the critical point. Moreover, in most cases, these equilibration times decrease with increasing baryon chemical potential while keeping the temperature fixed. (AU)

FAPESP's process: 17/05685-2 - Hadronic physics in high energy nuclear collisions
Grantee:Jun Takahashi
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/09263-2 - Out-of-equilibrium properties of the strongly coupled quark-gluon plasma
Grantee:Renato Anselmo Judica Critelli
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/50266-2 - Relativisitic heavy-ion collision dynamics: macroscopic approaches derived from microscopic physics
Grantee:Jorge José Leite Noronha Junior
Support type: Regular Research Grants