Universality of sound modes in kinetic theory
High Energy Physics - Phenomenology
2023-07-19 v1 Nuclear Theory
Abstract
We present a simple approach to extract hydrodynamic sound modes and non-hydrodynamic modes in kinetic theories from response functions of the energy-momentum tensor. By comparing the response functions in four types of kinetic theories, namely the Relaxation-Time Approximation, scalar theory, SU(3) Yang-Mills theory and QCD kinetic theory, we find a remarkable degree of universality for the sound mode, even beyond the hydrodynamic regime.
Keywords
Cite
@article{arxiv.2307.08886,
title = {Universality of sound modes in kinetic theory},
author = {Xiaojian Du and Stephan Ochsenfeld and Sören Schlichting},
journal= {arXiv preprint arXiv:2307.08886},
year = {2023}
}
Comments
6 pages, 4 figures; Proceeding on 11th International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions (Hard Probe 2023), 26-31 March 2023, Aschaffenburg, Germany