The refractive index in the viscous quark-gluon plasma
arXiv:1301.1789 · doi:10.1103/PhysRevD.88.045014
Abstract
Under the framework of the viscous chromohydrodynamics, the gluon self-energy is derived for the quark-gluon plasma with shear viscosity. The viscous electric permittivity and magnetic permeability are evaluated from the gluon self-energy, through which the refraction index %in the %viscous quark-gluon plasma is investigated. The numerical analysis indicates that the refractive index becomes negative in some frequency range. The start point for that frequency range is around the electric permittivity pole, and the magnetic permeability pole determines the end point. As the increase of , the frequency range for the negative refraction becomes wider.
8 pages, 5 figues, in revtex
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