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arXiv · 1507.04232

Shear Viscosities of Photons in Strongly Coupled Plasmas

Di-Lun Yang·Berndt Müller
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Abstract

We investigate the shear viscosity of thermalized photons in the quark gluon plasma (QGP) at weak coupling and $\mathcal{N}=4$ super Yang-Mills plasma (SYMP) at both strong and weak couplings. We find that the shear viscosity due to the photon-parton scattering up to the leading order of electromagnetic coupling is suppressed when the coupling of the QGP/SYMP is increased, which stems from the blue-shift of the thermal-photon spectrum at strong coupling. In addition, the shear viscosity rapidly increases near the deconfinement transition in a phenomenological model analogous to the QGP.

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Di-Lun Yang, Berndt Müller. 2016-07-13. Shear Viscosities of Photons in Strongly Coupled Plasmas. https://doi.org/10.1016/j.physletb.2016.07.034

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