Inverse magnetic catalysis in the linear sigma model with quarks

Abstract

We compute the critical temperature for the chiral transition in the background of a magnetic field in the linear sigma model, including the quark contribution and the thermo-magnetic effects induced on the coupling constants at one loop level. We show that the critical temperature decreases as a function of the field strength. The effect of fermions on the critical temperature is small and the main effect on this observable comes from the charged pions. The findings support the idea that the anticatalysis phenomenon receives a contribution due only to quiral symmetry effects independent of the deconfinement transition.

arXiv comment8 pages, 8 figures. arXiv admin note: substantial text overlap with arXiv:1406.3885. Accepted for publication in Phys. Rev. D

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