# A Virtual Tribute to Quark Confinement and the Hadron Spectrum 2021

Aug 2 – 6, 2021
online
Europe/Brussels timezone

## Heavy quark momentum diffusion from the lattice using gradient flow

Aug 4, 2021, 5:40 PM
20m
online

#### online

Parallel contribution C: Heavy quarks

### Speaker

Luis Altenkort (Bielefeld University)

### Description

Heavy quark transport coefficients calculated from first-principles QCD are a crucial input for transport models. Utilizing the heavy quark limit, we will discuss the results of a novel approach to nonperturbatively estimate the heavy quark diffusion coefficient in a hot gluonic medium from gradient-flowed color-electric correlators on the lattice. Unlike others, this approach can be extended to a medium with dynamical fermions. The correlation functions are computed on fine isotropic lattices at $1.5\,T_\text{c}$ and are extrapolated to yield continuum data at zero flow time that is fully renormalized. Through theoretically well-established model fits we estimate the corresponding spectral function and in turn the diffusion coefficient, which is consistent with previous studies.

### Primary author

Luis Altenkort (Bielefeld University)

### Co-authors

Hai-Tao Shu (Bielefeld University) Olaf Kaczmarek (Bielefeld University) Guy Moore (TU Darmstadt) Dr Alexander Max Eller (TU Darmstadt) Mr Lukas Mazur (Bielefeld University)