Hard parton dispersion in the quark-gluon plasma, non-perturbatively

Autor:	Ghiglieri, Jacopo, Moore, Guy D., Schicho, Philipp, Schlusser, Niels, Weitz, Eamonn
Rok vydání:	2023
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Theory
Druh dokumentu:	Working Paper
Popis:	The in-medium dispersion of hard partons, encoded in their so-called asymptotic mass, receives large non-perturbative contributions from classical gluons, i.e. soft gluons with large occupation numbers. Here, we discuss how the analytical properties of thermal amplitudes allow for a non-perturbative determination of the infrared classical contribution through lattice determinations in the dimensionally-reduced effective theory of hot QCD, EQCD. We show how these lattice determinations need to be complemented by perturbative two-loop matching calculations between EQCD and QCD, so that the unphysical (classical) ultraviolet behavior of EQCD is replaced by its proper quantum QCD counterpart. We show how lattice and perturbative EQCD are in good agreement in the UV and present an outlook on the two-loop quantum QCD contribution. Comment: 6 pages, to appear in the proceedings of Hard Probes 2023
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2307.09297 Zobrazit plný text záznamu View this record from Arxiv