The chiral transition in a magnetic background: Finite density effects and the functional renormalization group

Details The chiral transition in a magnetic background: Finite density effects and the functional renormalization group The chiral transition in a magnetic background: Finite density effects and the functional renormalization group

2012-04-16

arxiv.org/abs/1204.3360v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages and 6 figures

Scientific paper

We compute the phase diagram of the quark-meson model at finite temperature, finite baryon chemical potential $\mu_B=3\mu$ and constant external magnetic field $B$, using the functional renormalization group. Our results show that the critical temperature increases as a function of $B$ at $\mu=0$, but for values $\mu$ larger than about 210-225 MeV, the opposite behavior is realized. As the magnetic field increases, the critical point $(T^*,\mu^*)$ moves from large $\mu$, small $T$ towards small $\mu$, larger $T$ in the $\mu$--$T$ phase diagram.

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