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High Energy Physics - Theory

arXiv:1503.06967 (hep-th)
[Submitted on 24 Mar 2015 (v1), last revised 2 Jun 2015 (this version, v3)]

Title:Viscous Leptons in the Quark Gluon Plasma

Authors:Berndt Müller, Di-Lun Yang
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Abstract:We investigate the shear viscosity of leptons in a strongly coupled quark gluon plasma (QGP). We find that the shear viscosity due to the lepton-quark scattering is inversely proportional to the ratio of electric conductivity of the QGP to temperature up to the leading logarithmic order of the electromagnetic coupling. The finding implies that the thermal leptons form a more viscous fluid than the quarks by a large ratio. Using the known result for the electrical conductivity of strongly coupled plasmas obtained from gauge/gravity duality, we find that the lepton shear viscosity is suppressed compared with the one from lepton-lepton scattering. Consistently, we find an enhancement of the energy loss of hard leptons in a strongly coupled scenario compared with that in a weakly coupled plasma.
Comments: 6 pages, 2 figure, minor modifications, journal version accepted by Physical Review D
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1503.06967 [hep-th]
  (or arXiv:1503.06967v3 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1503.06967
Journal reference: Phys. Rev. D 91, 125010 (2015)
Related DOI: https://doi.org/10.1103/PhysRevD.91.125010

Submission history

From: Di-Lun Yang [view email]
[v1] Tue, 24 Mar 2015 09:51:28 UTC (54 KB)
[v2] Sat, 25 Apr 2015 16:28:21 UTC (124 KB)
[v3] Tue, 2 Jun 2015 08:28:49 UTC (124 KB)
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