Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma

Details Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma

2007-09-18

arxiv.org/abs/0709.2884v2

Phys.Rev.Lett.100:192301,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures, v2: version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.192301

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.

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