Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
Abstract
We evaluate heavy-quark (HQ) transport properties in a Quark-Gluon Plasma (QGP) employing interaction potentials extracted from thermal lattice QCD. Within a Brueckner many-body scheme we calculate in-medium T-matrices for charm- and bottom-quark scattering off light quarks in the QGP. The interactions are dominated by attractive meson and diquark channels which support bound and resonance states up to temperatures of ~1.5 T_c. We apply pertinent drag and diffusion coefficients (supplemented by perturbative scattering off gluons) in Langevin simulations in an expanding fireball to compute HQ spectra and elliptic flow in \sqrt{s_{NN}}=200 GeV Au-Au collisions. We find good agreement with semileptonic electron-decay spectra which supports our nonperturbative computation of the HQ diffusion coefficient, suggestive for a strongly coupled QGP.
Cite
@article{arxiv.0709.2884,
title = {Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma},
author = {H. van Hees and M. Mannarelli and V. Greco and R. Rapp},
journal= {arXiv preprint arXiv:0709.2884},
year = {2008}
}
Comments
4 pages, 4 figures, v2: version to appear in Phys. Rev. Lett