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Towards a non-perturbative measurement of the heavy quark momentum diffusion coefficient

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arxiv 1109.3941 v1 pith:HTOZOZRN submitted 2011-09-19 hep-lat hep-ph

Towards a non-perturbative measurement of the heavy quark momentum diffusion coefficient

classification hep-lat hep-ph
keywords heavydiffusionaboveexpansionlatticenon-perturbativeperturbativequark
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report on a lattice investigation of heavy quark diffusion within pure SU(3) plasma above the deconfinement transition, with the quarks treated to leading order in the heavy mass expansion. Using a multilevel algorithm, several volumes and lattice spacings, as well as tree-level improvement and perturbative renormalization, we measure the relevant "colour-electric" Euclidean correlator, finding that it clearly exceeds its perturbative counterpart. Even without analytic continuation, this suggests that at temperatures just above the critical one, non-perturbative interactions felt by the heavy quarks are stronger than within the weak-coupling expansion. After introducing rough modelling of the spectral shape, diffusion coefficients down to D ~ 0.5/T appear possible.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Momentum Dependence of Heavy Quark Diffusion in a Thermal Gluonic Plasma on the Lattice

    hep-lat 2026-06 unverdicted novelty 7.0

    A lattice QCD method is proposed to compute the momentum dependence of heavy quark drag and diffusion coefficients in a thermal gluonic plasma.

  2. Momentum Dependence of Heavy Quark Diffusion in a Thermal Gluonic Plasma on the Lattice

    hep-lat 2026-06 unverdicted novelty 7.0

    Lattice simulations of a 3D effective gluonic plasma theory produce the first reported momentum dependence of heavy quark drag and diffusion coefficients in a non-perturbative non-Abelian thermal medium.