| Texto completo | |
| Autor(es): |
Finazzo, Stefano Ivo
;
Rougemont, Romulo
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 93, n. 3, p. 16-pg., 2016-02-09. |
| Resumo | |
We obtain the thermal photon and dilepton production rates in a strongly coupled quark-gluon plasma (QGP) at both zero and nonzero baryon chemical potentials using a bottom-up Einstein-Maxwell-dilaton holographic model that is in good quantitative agreement with the thermodynamics of (2 + 1)-flavor lattice QCD around the crossover transition for baryon chemical potentials up to 400 MeV, which may be reached in the beam energy scan at RHIC. We find that increasing the temperature T and the baryon chemical potential mu(B) enhances the peak present in both spectra. We also obtain the electric charge susceptibility, the dc and ac electric conductivities, and the electric charge diffusion as functions of T and mu(B). We find that electric diffusive transport is suppressed as one increases mu(B). At zero baryon density, we compare our results for the dc electric conductivity and the electric charge diffusion with the latest lattice data available for these observables and find reasonable agreement around the crossover transition. Therefore, our holographic results may be used to constraint the magnitude of the thermal photon and dilepton production rates in a strongly coupled QGP, which we found to be at least 1 order of magnitude below perturbative estimates. (AU) | |
| Processo FAPESP: | 15/00240-7 - Aplicações da dualidade gauge/gravity a fenômenos não-perturbativos |
| Beneficiário: | Stefano Ivo Finazzo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/04036-0 - Cálculo das propriedades do plasma de quarks e glúons a temperatura e densidade bariônica finitas via holografia |
| Beneficiário: | Rômulo Cesar Rougemont Pereira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |