The effect of the isospin/charge asymmetry and an external magnetic field in the location of the critical end point (CEP) in the QCD phase diagram is investigated. By using the 2+1 flavor Nambu--Jona-Lasinio model with Polyakov loop (PNJL), it is shown that the isospin asymmetry shifts the CEP to larger baryonic chemical potentials and smaller temperatures, and in the presence of a large enough isospin asymmetry the CEP disappears. Nevertheless, a sufficiently high external magnetic field can drive the system into a first order phase transition again.
@article{arxiv.1409.6175,
title = {The QCD critical end point driven by an external magnetic field in asymmetric quark matter},
author = {Pedro Costa and Márcio Ferreira and Constança Providência and Hubert Hansen and Débora P. Menezes},
journal= {arXiv preprint arXiv:1409.6175},
year = {2015}
}
Comments
Contribution to the "20th Particles and Nuclei International Conference" (PANIC 14), Hamburg, Germany, 25-29 August 2014