Thermal imaginary part of a real-time static potential from classical lattice gauge theory simulations
Laine, Mikko
Philipsen, Owe
Tassler, Marcus
heavy quark physics
lattice gauge field theories
thermal field theory
Recently, a finite-temperature real-time static potential has been introduced via a Schrodinger-type equation satisfied by a certain heavy quarkonium Green's function. Furthermore, it has been pointed out that it possesses an imaginary part, which induces a finite width for the tip of the quarkonium peak in the thermal dilepton production rate. The imaginary part originates from Landau-damping of low-frequency gauge fields, which are essentially classical due to their high occupation number. Here we show how the imaginary part can be measured with classical lattice gauge theory simulations, accounting non-perturbatively for the infrared sector of finite-temperature field theory. We demons trate that a non-vanishing imaginary part indeed exists non-perturbatively; and that its value agrees semi-quantitatively with that predicted by Hard Loop resummed perturbation theory.
INT SCHOOL ADVANCED STUDIES
2007
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1631848
Laine M, Philipsen O, Tassler M. Thermal imaginary part of a real-time static potential from classical lattice gauge theory simulations. <em>JOURNAL OF HIGH ENERGY PHYSICS</em>. 2007;2007(09): 066.
eng
info:eu-repo/semantics/altIdentifier/doi/10.1088/1126-6708/2007/09/066
info:eu-repo/semantics/altIdentifier/issn/1126-6708
info:eu-repo/semantics/altIdentifier/issn/1029-8479
info:eu-repo/semantics/altIdentifier/wos/000249788800063
info:eu-repo/semantics/altIdentifier/arxiv/0707.2458
info:eu-repo/semantics/closedAccess