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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.)

Energy loss, equilibration, and thermodynamics of a baryon rich strongly coupled quark-gluon plasma

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Author(s):
Rougemont, Romulo [1] ; Ficnar, Andrej [2] ; Finazzo, Stefano I. [3, 1] ; Noronha, Jorge [4, 1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP - England
[3] Univ Estado Sao Paulo, Inst Fis Teor, Rua Dr Bento T Ferraz 271, BR-01140070 Sao Paulo, SP - Brazil
[4] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 - USA
Total Affiliations: 4
Document type: Journal article
Source: Journal of High Energy Physics; n. 4 APR 15 2016.
Web of Science Citations: 34
Abstract

Lattice data for the QCD equation of state and the baryon susceptibility near the crossover phase transition (at zero baryon density) are used to determine the input parameters of a 5-dimensional Einstein-Maxwell-Dilaton holographic model that provides a consistent holographic framework to study both equilibrium and out-of-equilibrium properties of a hot and baryon rich strongly coupled quark-gluon plasma (QGP). We compare our holographic equation of state computed at nonzero baryon chemical potential, mu(B), with recent lattice calculations and find quantitative agreement for the pressure and the speed of sound for mu(B) <= 400 MeV. This holographic model is used to obtain holographic predictions for the temperature and mu(B) dependence of the drag force and the Langevin diffusion coefficients associated with heavy quark jet propagation as well as the jet quenching parameter (q) over cap and the shooting string energy loss of light quarks in the baryon dense plasma. We find that the energy loss of heavy and light quarks generally displays a nontrivial, fast-varying behavior as a function of the temperature near the crossover. Moreover, energy loss is also found to generally increase due to nonzero baryon density effects even though this strongly coupled liquid cannot be described in terms of well defined quasiparticle excitations. Furthermore, to get a glimpse of how thermalization occurs in a hot and baryon dense QGP, we study how the lowest quasinormal mode of an external massless scalar disturbance in the bulk is affected by a nonzero baryon charge. We find that the equilibration time associated with the lowest quasinormal mode decreases in a dense medium. (AU)

FAPESP's process: 15/00240-7 - Applications of the gauge/gravity duality in non-perturbative phenomena
Grantee:Stefano Ivo Finazzo
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/21691-6 - Understanding strongly coupled non-Abelian plasmas using the gauge/gravity duality
Grantee:Stefano Ivo Finazzo
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/04036-0 - Computation of the properties of the quark-gluon plasma at nonzero temperature and baryonic density using the holographic correspondence
Grantee:Rômulo Cesar Rougemont Pereira
Support type: Scholarships in Brazil - Post-Doctorate