T-matrix approach to heavy quark diffusion in the QGP

Details T-matrix approach to heavy quark diffusion in the QGP T-matrix approach to heavy quark diffusion in the QGP

2008-08-27

arxiv.org/abs/0808.3710v1

Eur.Phys.J.C61:799-806,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 7 figures, contribution to the proceedings of the 3rd International Conference on Hard and Electro-Magnetic Probes of

Scientific paper

10.1140/epjc/s10052-008-0838-5

We assess transport properties of heavy quarks in the Quark-Gluon Plasma (QGP) using static heavy-quark (HQ) potentials from lattice-QCD calculations in a Brueckner many-body T-matrix approach to evaluate elastic heavy-quark-light-quark scattering amplitudes. In the attractive meson and diquark channels resonance states are formed for temperatures up to ~1.5 T_c, increasing pertinent drag and diffusion coefficients for heavy-quark rescattering in the QGP beyond the expectations from perturbative-QCD calculations. We use these transport coefficients, complemented with perturbative elastic HQ gluon scattering, in a relativistic Langevin simulation to obtain HQ p_t distributions and elliptic flow (v_2) under conditions relevant for the hot and dense medium created in ultrarelativistic heavy-ion collisions. The heavy quarks are hadronized to open-charm and -bottom mesons within a combined quark-coalescence fragmentation scheme. The resulting single-electron spectra from their semileptonic decays are confronted with recent data on "non-photonic electrons" in 100 AGeV Au-Au collisions at the Relativistic Heavy-Ion Collider (RHIC).

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