%0 Journal Article
%A Ruiz Cembranos, José Alberto
%A Delgado López, Rafael
%A Dobado González, Antonio
%T Brane worlds at the LHC: branons and KK gravitons
%D 2013
%@ 1550-7998
%U https://hdl.handle.net/20.500.14352/33420
%X We explore the viscosities of a photon gas by means of the Euler-Heisenberg effective theory and quantum electrodynamics at zero electron chemical potential. We find parametric estimates that show a very large shear viscosity and an extremely small bulk viscosity (reflecting the very weak coupling simultaneously with a very approximate dilatation invariance). The system is of some interest because it exemplifies very neatly the influence of the breaking of scale invariance on the bulk viscosity.
%~