Quarkonium states in an anisotropic QCD plasma
| Autor: | Dumitru, Adrian, Guo, Yun, Mocsy, Agnes, Strickland, Michael |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Phys.Rev.D79:054019,2009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.79.054019 |
| Popis: | 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. At asymptotic separation the potential energy is non-zero and inversely proportional to the temperature. 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. Comment: 18 pages, 6 figures, final version, to appear in PRD |
| Databáze: | arXiv |
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