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- W2090376119 abstract "We consider the quark-meson model with two quark flavors in a constant external magnetic field $B$ at finite temperature $T$ and finite baryon chemical potential $mu_B$. We calculate the full renormalized effective potential to one-loop order in perturbation theory. We study the system in the large-$N_c$ limit, where we treat the bosonic modes at tree level. It is shown that the system exhibits dynamical chiral symmetry breaking, i. e. that an arbitrarily weak magnetic field breaks chiral symmetry dynamically, in agreement with earlier calculations using the NJL model. We study the influence on the phase transition of the fermionic vacuum fluctuations. For strong magnetic fields, $|qB|sim5m_{pi}^2$ and in the chiral limit, the transition is first order in the entire $mu_B-T$ plane if vacuum fluctuations are not included and second order if they are included. At the physical point, the transition is a crossover for $mu_B=0$ with and without vacuum fluctuations." @default.
- W2090376119 created "2016-06-24" @default.
- W2090376119 creator A5006404974 @default.
- W2090376119 creator A5014378119 @default.
- W2090376119 date "2011-05-06" @default.
- W2090376119 modified "2023-10-17" @default.
- W2090376119 title "Chiral transition in a magnetic field and at finite baryon density" @default.
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- W2090376119 doi "https://doi.org/10.1103/physrevd.85.065026" @default.
- W2090376119 hasPublicationYear "2011" @default.
- W2090376119 type Work @default.