Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 23: Heavy Ion Collisions and QCD phases
HK 23.6: Vortrag
Dienstag, 17. März 2009, 15:45–16:00, H-ZO 10
Resonance Recombination Model for Quarks in the Quark-Gluon Plasma — •Hendrik van Hees1, Lorenzo Ravagli2, and Ralf Rapp2 — 1Institut für Theoretische Physik, Universität Giessen, Germany — 2Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843-3366, U.S.A.
We investigate a quark-recombination model based on the Boltzmann
equation, assuming the survival of hadron-resonance like correlations in
the sQGP near the hadronisation phase transition. The quark phase-space
distributions are taken from a relativistic Langevin simulation for
quark diffusion in an equilibrated QGP, described by a thermal
elliptically cylindric fireball model, adjusted to the results of
hydrodynamic calculations. The drag and diffusion coefficients are
inferred from leading-order pQCD interactions augmented by effective
Lagrangians with resonances smoothly merging into hadronic states at the
phase transition, consistent with our assumption of resonance
recombination at Tc. This resonance-recombination model, obeying
energy-momentum conservation and leading to thermal equilibrium for the
hadrons, reproduces the observed CQNS of v2(KT) for the here
investigated φ, J/ψ, and D-mesons.
Work supported by the US National Science Foundation under grant
No. PHY-0449489, and by a Bessel Research Award from the A.-v.-Humboldt
foundation.