The chiral transition in a magnetic background: Finite density effects and the functional renormalization group
Journal article, Peer reviewed
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OriginalversjonJournal of High Energy Physics (JHEP). 2012, 2 (8) 10.1007/JHEP08(2012)002
We compute the phase diagram of the quark-meson model at finite temperature, finite baryon chemical potential μ B = 3 μ 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 μ = 0, but for values μ larger than about 210 − 225 MeV, the opposite behavior is realized. As the magnetic field increases, the critical point (T * , μ *) moves from large μ, small T towards small μ, larger T in the μ-T phase diagram.