Chiral and deconfinement transitions in a magnetic background using the functional renormalization group with the Polyakov loop

Abstract

We use the Polyakov loop coupled quark-meson model to approximate low energy QCD and present results for the chiral and deconfinement transitions in the presence of a constant magnetic background $B$ at finite temperature $T$ and baryon chemical potential ${\mu }_B$. We investigate effects of various gluoni potentials on the deconfinement transition with and without a fermionic backreaction at finite $B$. Additionally we investigate the effect of the Polyakov loop on the chiral phase transition, finding that magnetic catalysis at low ${\mu }_B$ is present, but weakened by the Polyakov loop.

Comments: 17 pages and 8 figs. v2: added refs