TY - JOUR
T1 - Shear viscosities of photons in strongly coupled plasmas
AU - Yang, Di Lun
AU - Müller, Berndt
N1 - Funding Information:
The authors thank A. Mukhopadhyay and P. Romatschke for fruitful discussions. This work was supported by Grant no. DE-FG02-05ER41367 from the U.S. Department of Energy and in part by European Union's Seventh Framework Programme under grant agreements (FP7-REGPOT-2012-2013-1) no 316165 , the EUGreece program “Thales” MIS 375734 and was also co-financed by the European Union ( European Social Fund , ESF) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) under “Funding of proposals that have received a positive evaluation in the 3rd and 4th Call of ERC Grant Schemes” and the RIKEN Foreign Postdoctoral Researcher program.
Publisher Copyright:
© 2016
PY - 2016/9/10
Y1 - 2016/9/10
N2 - We investigate the shear viscosity of thermalized photons in the quark gluon plasma (QGP) at weak coupling and 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.
AB - We investigate the shear viscosity of thermalized photons in the quark gluon plasma (QGP) at weak coupling and 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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U2 - 10.1016/j.physletb.2016.07.034
DO - 10.1016/j.physletb.2016.07.034
M3 - Article
AN - SCOPUS:84989811252
SN - 0370-2693
VL - 760
SP - 565
EP - 570
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -