| Full text | |
| Author(s): |
Rougemont, Romulo
;
Ficnar, Andrej
;
Finazzo, Stefano I.
;
Noronha, Jorge
Total Authors: 4
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 4, p. 50-pg., 2016-04-15. |
| 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 11/21691-6 - Understanding strongly coupled non-Abelian plasmas using the gauge/gravity duality |
| Grantee: | Stefano Ivo Finazzo |
| Support Opportunities: | 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |