Thermal photon production in a strongly coupled anisotropic plasma
arXiv:1211.2199 · doi:10.1007/JHEP02(2013)154
Abstract
Photons produced in heavy ion collisions escape virtually unperturbed from the surrounding medium, thus representing an excellent probe of the conditions at the emission point. Using the gauge/gravity duality, we calculate the rate of photon production in an anisotropic, strongly coupled N=4 plasma with Nf<<Nc quark flavors. We consider arbitrary orientations of the photon momentum with respect to the anisotropic direction, as well as arbitrary values of the anisotropy. We present results for the correlation functions of two electromagnetic currents and for the electric conductivity. These quantities can be larger or smaller than the isotropic ones, depending on the direction of propagation and polarization of the photons. The total production rate is however always larger than the isotropic one, independently of the frequency, direction of propagation, and value of the anisotropy.
27 pages, 13 figures; v2: minor changes, added references
References in corpus (14)
- Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
- Minkowski-space correlators in AdS/CFT correspondence: recipe and applications
- Dissipative Dynamics of Highly Anisotropic Systems
- Photon and dilepton production in supersymmetric Yang-Mills plasma
- On String Theory Duals of Lifshitz-like Fixed Points
- Photon production from an anisotropic quark-gluon plasma
- Holographic RG flow of the shear viscosity to entropy density ratio in strongly coupled anisotropic plasma
- Photoemission with Chemical Potential from QCD Gravity Dual
- Bright branes for strongly coupled plasmas
- Towards the description of anisotropic plasma at strong coupling
- Jet quenching in a strongly coupled anisotropic plasma
- Quarkonium dissociation by anisotropy
- Quark Soup al dente: Applied Superstring Theory
- Light Probes in a Strongly Coupled Anisotropic Plasma