Diamagnetic and Paramagnetic Phases in Low-Energy Quantum Chromodynamics

Autor:	Hofmann, Christoph P.
Rok vydání:	2021
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physletb.2021.136384
Popis:	While it is known that the QCD vacuum in a magnetic background exhibits both diamagnetic and paramagnetic characteristics in the low-energy domain, a systematic investigation of the corresponding phases emerging in the pion-dominated regime is still lacking. Here, within two-flavor chiral perturbation theory, taking into account the pion-pion interaction, we analyze the subtle interplay between zero- and finite-temperature portions in the magnetization and magnetic susceptibility. The dependence of the magnetic susceptibility on temperature and magnetic field strength in the paramagnetic and diamagnetic phase is non-monotonic. Our low-energy analysis complements lattice QCD that is currently operating at higher temperatures and stronger magnetic fields. Comment: 17 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2103.04937 Zobrazit plný text záznamu View this record from Arxiv