Lattice QCD constraints on the heavy quark diffusion coefficient
Nora Brambilla, Viljami Leino, Péter Petreczky, Antonio Vairo
Abstract
We report progress toward computing the heavy quark momentum diffusion coefficient from the correlator of two chromoelectric fields attached to a Polyakov loop in pure SU(3) gauge theory. Using a multilevel algorithm and tree-level improvement, we study the behavior of the diffusion coefficient as a function of temperature in the wide range $1.1<T/{T}_{\mathrm{c}}<{10}^{4}$ in order to compare it to perturbative expansions at high temperature. We find that within errors, the lattice results are remarkably compatible with the next-to-leading-order perturbative result.
Topics & Concepts
Lattice QCDLattice (music)Particle physicsQuantum chromodynamicsPhysicsCondensed matter physicsStatistical physicsAcousticsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research