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Phase transition and critical end point driven by an external magnetic field in asymmetric quark matter

Authors: Pedro Costa, Márcio Ferreira, Hubert Hansen, Débora P. Menezes, Constança Providência

Ref.: Phys. Rev. D 89, 056013-7 (2014)

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.potentials and smaller temperatures. At large asymmetries the CEP disappears. However, a strong enough magnetic field will drive the system into a first order phase transition.

DOI: 10.1103/PhysRevD.89.056013