Inverse magnetic catalysis for the chiral transition induced by thermo-magnetic effects on the coupling constant

Abstract

We compute the one-loop thermo-magnetic corrections to the self-coupling in a model where charged scalars interact also with a constant magnetic field. The calculation is motivated by the possibility that the critical temperature for the chiral phase transition in a magnetic background can be influenced by the dependence of the coupling constant on the magnetic field. We show that the coupling decreases as a function of the field strength. This functional dependence introduces in turn a correction to the boson masses which causes the critical temperature to decrease as a function of the field strength.

arXiv comment5 pages, 4 figures. Title changed, added references and comments. Version to appear in Phys. Rev. D

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