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Wilson loop in classical lattice gauge theory and the thermal width of heavy quarkonium

Oct, 2007
7 pages
Published in:
  • PoS LATTICE2007 (2007) 230
Contribution to:
e-Print:
DOI:
Report number:
  • MS-TP-07-30
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2007200820092010103
Abstract: (arXiv)
We present an estimate for the imaginary part of the recently introduced finite temperature real-time static potential. It can be extracted from the time evolution of the Wilson loop in classical lattice gauge theory. The real-time static potential determines, through a Schroedinger-type equation and a subsequent Fourier-transform of its solution, the spectral function of heavy quarkonium in finite-temperature QCD. We also compare the results of the classical simulations with those of Hard Thermal Loop improved simulations, as well as with analytic expectations based on resummed perturbation theory.