RT Journal Article
T1 Brane worlds at the LHC: branons and KK gravitons
A1 Ruiz Cembranos, José Alberto
A1 Delgado López, Rafael
A1 Dobado González, Antonio
AB 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.
PB American Physical Society
SN 1550-7998
YR 2013
FD 2013-10-29
LK https://hdl.handle.net/20.500.14352/33420
UL https://hdl.handle.net/20.500.14352/33420
LA eng
NO © 2013 American Physical Society.The authors thankfully acknowledge the computer resources, technical expertise, and assistance provided by the Barcelona Supercomputing Centre—Centro Nacional de Supercomputación—and the Tirant supercomputer support staff at Valencia. We are also pleased to thank Professor Antonio L. Maroto and Professor Torbjo¨rn Sjöstrand for their useful help and comments. This work has been supported by MICINN (Spain) Project Nos. FIS 2008-01323, FIS2011-23000, and FPA2011-27853-01 and Consolider-Ingenio MULTIDARK CSD2009-00064. R. L.D. is a fellow of FPI, Ref. BES-2012-056054.
NO MICINN (Spain)
NO Consolider-Ingenio MULTIDARK
DS Docta Complutense
RD 6 jul 2025