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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.)

Thermal photon, dilepton production, and electric charge transport in a baryon rich strongly coupled QGP from holography

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Finazzo, Stefano Ivo [1] ; Rougemont, Romulo [2]
Total Authors: 2
[1] Univ Estado Sao Paulo, Inst Fis Teor, Rua Dr Bento T Ferraz 271, BR-01140070 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Fis, CP 66318, BR-05315970 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Physical Review D; v. 93, n. 3 FEB 9 2016.
Web of Science Citations: 22

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)

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: 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