Speaker
Dr
Hamza Berrehrah
(FIAS)
Description
The transport properties (shear and bulk viscosities, electric and heat conductivities, etc) of the strongly coupled quark gluon plasma (sQGP) are computed at finite temperature and chemical potential. The cross sections for quark ($q$), anti-quark ($\bar{q}$) and gluon ($g$) elastic scattering at finite temperature and chemical potential, used in our study, are evaluated for dynamical quasi-particles (massive off-shell particles as described by the dynamical quasi-particles model “DQPM” [1]) using the leading order Born diagrams [2].
Within our study, we demonstrate the influence of the finite masse and width of the quasi-particles on the thermodynamic and transport properties of the sQGP. We, furthermore, provide a comprehensive comparison between different models such as the Nambu-Jona-Lasinio (NJL) model and the dynamical quasi-particle model (DQPM) at finite temperature and confront these results with lattice QCD data whenever available [3, 4]. Our results at finite chemical potential constitute a first step for transport approaches aiming to study the QGP at FAIR/NICA experiments [4].
[1] W. Cassing, Eur. Phys. J. Spec. Top. 168, 3 (2009)
[2] H. Berrehrah, E. Bratkovskaya, W. Cassing, P.B. Gossiaux, J. Aichelin, and M. Bleicher, Phys.Rev. C89, 054901 (2014).
[3] R. Marty, E. Bratkovskaya, W. Cassing, J. Aichelin and H. Berrehrah, Phys. Rev. C88 (2013) 045204
[4] H. Berrehrah, E. Bratkovskaya, W. Cassing, and R. Marty, to be submitted.
Author
Dr
Hamza Berrehrah
(FIAS)
Co-authors
Elena Bratkovskaya
(FIAS)
Rudy Marty
(FIAS (Frankfurt, GERMANY))
Wolfgang Cassing
(University of Giessen)
