### Session HH: Ultra-relativistic Heavy Ions: Heavy Flavor Production

10:30 AM–12:06 PM, Friday, November 5, 2010
Room: Lamy

Chair: Gerd Kunde, Los Alamos National Laboratory

Abstract ID: BAPS.2010.DNP.HH.2

### Abstract: HH.00002 : Towards the Gravity Dual of Quarkonium in the Strongly Coupled QCD Plasma

10:42 AM–10:54 AM

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#### Authors:

Paul Hohler
(University of Illinois Chicago)

Hovhannes Grigoryan
(Argonne National Lab)

Mikhail Stephanov
(University of Illinois Chicago)

We build a bottom-up'' holographic model of charmonium by matching the essential spectral data. We argue that this data must include not only the masses but also the decay constants of the $J/\psi$ and $\psi'$ mesons. Relative to the soft-wall'' models for {\em light} mesons, such a matching requires two new features in the holographic potential: an overall upward shift as well as a narrow dip'' near the holographic boundary. We calculate the spectral function as well as the position of the complex singularities (quasinormal frequencies) of the retarded correlator of the charm current at finite temperatures. We further extend this analysis by showing that the residues associated with these singularities are given by the boundary derivative of the appropriately normalized quasinormal mode. We find that the melting'' of the $J/\psi$ spectral peak occurs at a temperature $T\approx 540$ MeV, or 2.8 $T_c$, in good agreement with lattice results.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DNP.HH.2