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Photon and dilepton production in supersymmetric Yang-Mills plasma

Photon and dilepton production in supersymmetric Yang-Mills plasma
Photon and dilepton production in supersymmetric Yang-Mills plasma
By weakly gauging one of the U(1) subgroups of the R-symmetry group, = 4 super-Yang-Mills theory can be coupled to electromagnetism, thus allowing a computation of photon production and related phenomena in a QCD-like non-Abelian plasma at both weak and strong coupling. We compute photon and dilepton emission rates from finite temperature = 4 supersymmetric Yang-Mills plasma both perturbatively at weak coupling to leading order, and non-perturbatively at strong coupling using the AdS/CFT duality conjecture. Comparison of the photo-emission spectra for = 4 plasma at weak coupling, = 4 plasma at strong coupling, and QCD at weak coupling reveals several systematic trends which we discuss. We also evaluate the electric conductivity of = 4 plasma in the strong coupling limit, and to leading-log order at weak coupling. Current-current spectral functions in the strongly coupled theory exhibit hydrodynamic peaks at small frequency, but otherwise show no structure which could be interpreted as well-defined thermal resonances in the high-temperature phase.
Caron-Huot, S.
ccbb200c-e59e-4782-9c3a-f6c4f16d6e26
Kovtun, P.
1295ff06-dcb7-427c-bfbc-5f6db8227a07
Moore, G.D.
a576945d-9fc1-4094-b50f-5b6cf83fbef1
Starinets, A.
90ec16af-e201-4555-99b7-93152ef9d224
Yaffe, L.G
82432d90-7654-4ba8-b119-6d9807caab38
Caron-Huot, S.
ccbb200c-e59e-4782-9c3a-f6c4f16d6e26
Kovtun, P.
1295ff06-dcb7-427c-bfbc-5f6db8227a07
Moore, G.D.
a576945d-9fc1-4094-b50f-5b6cf83fbef1
Starinets, A.
90ec16af-e201-4555-99b7-93152ef9d224
Yaffe, L.G
82432d90-7654-4ba8-b119-6d9807caab38

Caron-Huot, S., Kovtun, P., Moore, G.D., Starinets, A. and Yaffe, L.G (2006) Photon and dilepton production in supersymmetric Yang-Mills plasma. Journal of High Energy Physics, 12. (doi:10.1088/1126-6708/2006/12/015).

Record type: Article

Abstract

By weakly gauging one of the U(1) subgroups of the R-symmetry group, = 4 super-Yang-Mills theory can be coupled to electromagnetism, thus allowing a computation of photon production and related phenomena in a QCD-like non-Abelian plasma at both weak and strong coupling. We compute photon and dilepton emission rates from finite temperature = 4 supersymmetric Yang-Mills plasma both perturbatively at weak coupling to leading order, and non-perturbatively at strong coupling using the AdS/CFT duality conjecture. Comparison of the photo-emission spectra for = 4 plasma at weak coupling, = 4 plasma at strong coupling, and QCD at weak coupling reveals several systematic trends which we discuss. We also evaluate the electric conductivity of = 4 plasma in the strong coupling limit, and to leading-log order at weak coupling. Current-current spectral functions in the strongly coupled theory exhibit hydrodynamic peaks at small frequency, but otherwise show no structure which could be interpreted as well-defined thermal resonances in the high-temperature phase.

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Published date: 2006

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Local EPrints ID: 57134
URI: http://eprints.soton.ac.uk/id/eprint/57134
PURE UUID: 770521f4-a22e-476b-a828-595f81eeb971

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Date deposited: 13 Aug 2008
Last modified: 30 Jul 2019 17:43

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Contributors

Author: S. Caron-Huot
Author: P. Kovtun
Author: G.D. Moore
Author: A. Starinets
Author: L.G Yaffe

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