%0 Journal Article
%T How to compute the thermal quarkonium spectral function from first principles?
%A Laine
%A M.
%J High Energy Physics - Phenomenology
%D 2008
%I 
%R 10.1016/j.nuclphysa.2009.01.015
%X In the limit of a high temperature T and a large quark-mass M, implying a small gauge coupling g, the heavy quark contribution to the spectral function of the electromagnetic current can be computed systematically in the weak-coupling expansion. We argue that the scale hierarchy relevant for addressing the disappearance ("melting") of the resonance peak from the spectral function reads M >> T > g^2 M > gT >> g^4 M, and review how the heavy scales can be integrated out one-by-one, to construct a set of effective field theories describing the low-energy dynamics. The parametric behaviour of the melting temperature in the weak-coupling limit is specified.
%U http://arxiv.org/abs/0810.1112