6533b83afe1ef96bd12a7a07
RESEARCH PRODUCT
Heavy quark momentum diffusion coefficient in 3D gluon plasma
K. BoguslavskiAleksi KurkelaAleksi KurkelaTuomas LappiTuomas LappiJ. Peuronsubject
QuarkNuclear and High Energy PhysicsInfraredInitial stagesTransporthep-latFOS: Physical sciencesGlasmaHeavy flavour01 natural sciencesPower law114 Physical sciencesMomentum diffusionDiffusionHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Electric fieldLattice (order)0103 physical sciencesPre-equilibrium dynamics010306 general physicsParticle Physics - PhenomenologyPhysics010308 nuclear & particles physicsHigh Energy Physics - Lattice (hep-lat)Particle Physics - Latticehep-phPlasmaGluonHigh Energy Physics - PhenomenologyQuantum electrodynamicsdescription
We study the heavy-quark momentum diffusion coefficient in far from equilibrium gluon plasma in a self-similar regime using real-time lattice techniques. We use 3 methods for the extraction: an unequal time electric field 2-point correlator integrated over the time difference, a spectral reconstruction (SR) method based on the measured equal time electric field correlator and a kinetic theory (KT) formula. The time-evolution of the momentum diffusion coefficient extracted using all methods is consistent with an approximate $t^{\frac{-1}{2}}$ power law. We also study the extracted diffusion coefficient as a function of the upper limit of the time integration and observe that including the infrared enhancement of the equal-time correlation function in the SR calculation improves the agreement with the data for transient time behavior considerably. This is a gauge invariant confirmation of the infrared enhancement previously observed only in gauge fixed correlation functions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-31 | Nuclear Physics A |