Thermal Transport and Drag Force in Improved Holographic QCD
High Energy Physics - Phenomenology
2010-05-19 v4 High Energy Physics - Theory
Nuclear Theory
Abstract
We calculate the bulk viscosity, drag force and jet quenching parameter in Improved Holographic QCD. We find that the bulk viscosity rises near the phase transition but does not exceed the shear viscosity. The drag force shows the effects of asymptotic freedom both as a function of velocity and temperature. It indicates diffusion times of heavy quarks in rough agreement with data. The jet quenching parameter values computed via the light-like Wilson loop are in the lower range suggested by data.
Keywords
Cite
@article{arxiv.0906.1890,
title = {Thermal Transport and Drag Force in Improved Holographic QCD},
author = {Umut Gürsoy and Elias Kiritsis and Georgios Michalogiorgakis and Francesco Nitti},
journal= {arXiv preprint arXiv:0906.1890},
year = {2010}
}
Comments
Latex, 61 pages, 18 eps figures. Published version: bulk viscosity section expanded, discussion improved, 2 appendices added; v3: minor mistakes corrected; v4: mistake in eq. (4.21) corrected.