Nonperturbative heavy-quark diffusion in the quark-gluon plasma

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 b...

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Bibliographic Details
Published in:Physical review letters 2008-05, Vol.100 (19), p.192301-192301, Article 192301
Main Authors: van Hees, H, Mannarelli, M, Greco, V, Rapp, R
Format: Article
Language:English
Subjects:
CALCULATION METHODS
COLLIDING BEAMS
COMPUTERIZED SIMULATION
ELECTRONS
ENERGY LEVELS
GEV RANGE 100-1000
GOLD 197 BEAMS
GOLD 197 REACTIONS
GOLD 197 TARGET
MANY-BODY PROBLEM
MESONS
PARTICLE DECAY
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
RELATIVISTIC RANGE
S MATRIX
SCATTERING
SPECTRA
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Summary: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 ~1.5T(c). 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 sqrt[s(NN)]=200 GeV Au-Au collisions. A good agreement with electron decay data supports our nonperturbative computation of HQ diffusion, indicative for a strongly coupled QGP.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.192301