2018/12/14 by Kirill Boguslavski, Aleksi Kurkela, Boguslavski, Kirill +5
Materials Science · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Material Dynamics and Properties #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.1812.06106
openalex publication_date 2018/12/14 · openalex created_date 2022/08/01 · openalex updated_date 2026/07/28
We present a new method to obtain spectral properties of a non-Abelian gauge\ntheory in the region where occupation numbers are high. The method to measure\nthe (single-particle) spectral function is based on linear response theory and\nclassical-statistical lattice simulations. Although we apply it to a system far\nfrom equilibrium in a self-similar regime, the extracted spectral function can\nbe understood within the hard thermal loop (HTL) formalism and can thus be\nconnected to thermal equilibrium at high temperatures. This allows us to obtain\nquantities like the lifetime of quasiparticles that are beyond the leading\norder and difficult to compute within HTL. The approach has the potential to\nmeasure transport coefficients, to study the earliest stages of heavy-ion\ncollisions in a controlled way and it can be employed beyond the range of\nvalidity of HTL.\n