Q¯ modes in the Quark-Gluon Plasma
Cyclotron Institute and Physics Department, Texas A&M University, College Station, 77843-3366, TX, USA
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Accepted: 15 November 2006
Published online: 15 March 2007
We study the evolution of heavy quarkonium states with temperature in a Quark-Gluon Plasma (QGP) by evaluating an in-medium Q¯ T-matrix within a reduced Bethe-Salpeter equation in S- and P-wave channels. The interaction kernel is extracted from finite-temperature QCD lattice calculations of the singlet free energy of a Q¯ pair. Quarkonium bound states are found to gradually move across the Q¯ threshold after which they rapidly dissolve in the hot system. We calculate Euclidean-time correlation functions and compare to results from lattice QCD. We also study finite-width effects in the heavy-quark propagators.
PACS: 25.75.Dw Particle and resonance production – / 12.38.Gc Lattice QCD calculations – / 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes – / 25.75.Nq Quark deconfinement, quark-gluon plasma production, and phase transitions –
© Società Italiana di Fisica and Springer-Verlag, 2007