Quarkonium states in an anisotropic QCD plasma
Jan, 2009
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Abstract: (arXiv)
We consider quarkonium in a hot QCD plasma which, due to expansion and non-zero viscosity, exhibits a local anisotropy in momentum space. At short distances the heavy-quark potential is known at tree level from the hard-thermal loop resummed gluon propagator in anisotropic perturbative QCD. The potential at long distances is modeled as a QCD string which is screened at the same scale as the Coulomb field. We obtain numerical solutions of the three-dimensional Schroedinger equation for this potential. We find that quarkonium binding is stronger at non-vanishing viscosity and expansion rate, and that the anisotropy leads to polarization of the P-wave states.- quantum chromodynamics: plasma
- perturbation theory
- string: screening
- gluon: propagator
- plasma: anisotropy
- quarkonium: heavy
- viscosity
- Schroedinger equation: solution
- numerical calculations
- hard thermal loop approximation
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