Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma

H. van Hees, M. Mannarelli, V. Greco, and R. Rapp
Phys. Rev. Lett. 100, 192301 – Published 13 May 2008

Abstract

We evaluate heavy-quark (HQ) transport properties in a quark-gluon plasma (QGP) within a Brueckner many-body scheme employing interaction potentials extracted from thermal lattice QCD. The in-medium T matrices for elastic charm- and bottom-quark scattering off light quarks in the QGP are dominated by attractive meson and diquark channels which support resonance states up to temperatures of 1.5Tc. The resulting drag coefficient increases with decreasing temperature, contrary to expectations based on perturbative QCD scattering. Employing relativistic Langevin simulations we compute HQ spectra and elliptic flow in sNN=200GeV Au-Au collisions. A good agreement with electron decay data supports our nonperturbative computation of HQ diffusion, indicative for a strongly coupled QGP.

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  • Received 18 September 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.192301

©2008 American Physical Society

Authors & Affiliations

H. van Hees1, M. Mannarelli2, V. Greco3, and R. Rapp1

  • 1Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843-3366, USA
  • 2Instituto de Ciencias del Espacio (IEEC/CSIC), E-08193 Bellaterra (Barcelona), Spain
  • 3Dipartimento di Fisica e Astronomia, Via S. Sofia 64, I-95125 Catania, Italy

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Vol. 100, Iss. 19 — 16 May 2008

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