We report on a lattice QCD calculation with two dynamical flavors of the isovector vector correlator in the high-temperature phase. We analyze the correlator in terms of the associated spectral function by performing a fit for the difference of the thermal and vacuum spectral functions, using also an exact sum rule that constrains this difference. Additonally we carry out a direct fit for the thermal spectral function, and obtain good agreement between the two analyses for frequencies below the two-pion threshold. Under the assumption that the spectral function is smooth in that region, we give an estimate of the electrical conductivity.
@article{arxiv.1302.0675,
title = {Two-flavour lattice QCD correlation functions in the deconfinement transition region},
author = {Bastian B. Brandt and Anthony Francis and Harvey B. Meyer and Hartmut Wittig},
journal= {arXiv preprint arXiv:1302.0675},
year = {2013}
}
Comments
8 pages, 7 figures, Proceedings "Xth Quark Confinement and the Hadron Spectrum"