Deconfinement and chiral phase transitions in quark matter with a strong electric field

William R Tavares,Ricardo L S Farias,Sidney S Avancini

doi:10.1103/physrevd.101.016017

Abstract

The deconfinement and chiral phase transitions are studied in the context of the electrized quark matter at finite temperature in the two-flavor Polyakov-Nambu--Jona-Lasinio model. Using the mean field approximation and an electric field independet regularization we show that the effect of temperature and/or electric fields is to partially restore the chiral symmetry. The deconfinement phase transition is slightly affected by the magnitude of the electric field. To this end we show how the effective quark masses and the expectation value of the Polyakov Loop are affected by the electric fields at finite temperatures. As a very interesting result, the pseudocritical temperatures for chiral symmetry restoration and deconfinement decrease as we increase the magnitude of the electric fields, however, both start to increase after some critical value of the electric field.

Highlights

Recent numerical simulations provide possibilities for strong electromagnetic fields to be present in noncentral heavy ion collisions (HIC) [1,2,3,4]
In this work we have presented a study for strongly electrized quark matter within the SU(2) PNJL and Nambu–Jona-Lasinio model SU(2) model (NJL) models at finite temperatures in the mean field approximation
We have shown that the constituent quark masses decrease as we grow both electric fields and temperatures, as a signature of the partial restoration of the chiral symmetry

Summary

Introduction

Recent numerical simulations provide possibilities for strong electromagnetic fields to be present in noncentral heavy ion collisions (HIC) [1,2,3,4] These indications suggest even more properties to be explored in the strongly interacting quark matter, besides the usual strong magnetic fields [5], that are supposed to be created in noncentral HIC or in magnetars [6,7]. In asymmetric Cu þ Au collisions [4,9,10] it is expected that a strong electric field is generated in the overlapping region This happens because there is a different number of electric charges in each nuclei and it is argued that this is a fundamental property due to the charge dipole formed in the early stage of the collision.

Objectives

Results

Conclusion