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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Rougemont, Romulo [1] ; Critelli, Renato [2] ; Noronha, Jorge [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 98, n. 3 AUG 30 2018.
Citações Web of Science: 4
Resumo

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)

Processo FAPESP: 17/05685-2 - Física hadrônica em colisões nucleares de altas energias
Beneficiário:Jun Takahashi
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/09263-2 - Propriedades fora do equilíbrio do plasma de quarks e glúons fortemente acoplado
Beneficiário:Renato Anselmo Judica Critelli
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 15/50266-2 - Relativisitic heavy-ion collision dynamics: macroscopic approaches derived from microscopic physics
Beneficiário:Jorge José Leite Noronha Junior
Linha de fomento: Auxílio à Pesquisa - Regular