A way to estimate the heavy quark thermalization rate from the lattice

Caron-Huot S, Laine M, Moore GD (2009)
JOURNAL OF HIGH ENERGY PHYSICS 2009(04): 053.

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Abstract
The thermalization rate of a heavy quark is related to its momentum diffusion coefficient. Starting from a Kubo relation and using the framework of the heavy quark effective theory, we argue that in the large-mass limit the momentum diffusion coefficient can be defined through a certain Euclidean correlation function, involving color-electric fields along a Polyakov loop. Furthermore, carrying out a perturbative computation, we demonstrate that the spectral function corresponding to this correlator is relatively flat at small frequencies. Therefore, unlike in the case of several other transport coefficients, for which the narrowness of the transport peak makes analytic continuation from Euclidean lattice data susceptible to severe systematic uncertainties, it appears that the determination of the heavy quark thermalization rate could be relatively well under control.
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Caron-Huot S, Laine M, Moore GD. A way to estimate the heavy quark thermalization rate from the lattice. JOURNAL OF HIGH ENERGY PHYSICS. 2009;2009(04): 053.
Caron-Huot, S., Laine, M., & Moore, G. D. (2009). A way to estimate the heavy quark thermalization rate from the lattice. JOURNAL OF HIGH ENERGY PHYSICS, 2009(04), 053. doi:10.1088/1126-6708/2009/04/053
Caron-Huot, S., Laine, M., and Moore, G. D. (2009). A way to estimate the heavy quark thermalization rate from the lattice. JOURNAL OF HIGH ENERGY PHYSICS 2009:053.
Caron-Huot, S., Laine, M., & Moore, G.D., 2009. A way to estimate the heavy quark thermalization rate from the lattice. JOURNAL OF HIGH ENERGY PHYSICS, 2009(04): 053.
S. Caron-Huot, M. Laine, and G.D. Moore, “A way to estimate the heavy quark thermalization rate from the lattice”, JOURNAL OF HIGH ENERGY PHYSICS, vol. 2009, 2009, : 053.
Caron-Huot, S., Laine, M., Moore, G.D.: A way to estimate the heavy quark thermalization rate from the lattice. JOURNAL OF HIGH ENERGY PHYSICS. 2009, : 053 (2009).
Caron-Huot, Simon, Laine, Mikko, and Moore, Guy D. “A way to estimate the heavy quark thermalization rate from the lattice”. JOURNAL OF HIGH ENERGY PHYSICS 2009.04 (2009): 053.
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