arXiv:1307.7894·v2·High Energy Physics — Phenomenology
Phase transition and critical end point driven by an external magnetic field in asymmetric quark matter
Pedro Costa🇵🇹 · Márcio Ferreira🇵🇹 · Hubert Hansen🇫🇷 · Débora P. Menezes🇧🇷 · Constança Providência🇵🇹
Abstract
The location of the critical end point (CEP) in the QCD phase diagram is determined under different scenarios. The effect of strangeness, isospin/charge asymmetry and an external magnetic field is investigated. The discussion is performed within the 2+1 flavor Nambu--Jona-Lasinio model with Polyakov loop. It is shown that isospin asymmetry shifts the CEP to larger baryonic chemical potentials and smaller temperatures. At large asymmetries the CEP disappears. However, a strong enough magnetic field drives the system into a first order phase transition.
Comments: 7 pages, 3 figures; PRD version