Abstract
We study the behavior of strongly interacting matter under an external magnetic field in the context of nonlocal Nambu–Jona-Lasinio (NJL) -like models. We find that at zero temperature the condensates display the well-known Magnetic Catalysis effect, showing a good quantitative agreement with lattice QCD (LQCD) results. Moreover, when extended to finite temperature we find that (contrary to what happens in the local NJL model) the Inverse Magnetic Catalysis (IMC) effect is naturally incorporated. We also analyze the magnetic susceptibility of the QCD vacuum in the limit of small magnetic field, considering two different model parametrizations, and compare our numerical results to those obtained in other theoretical approaches and in LQCD calculations.
Highlights
We study the behavior of strongly interacting matter under an external magnetic field in the context of nonlocal Nambu–Jona-Lasinio (NJL) -like models
We analyze the magnetic susceptibility of the QCD vacuum in the limit of small magnetic field, considering two different model parametrizations, and compare our numerical results to those obtained in other theoretical approaches and in lattice QCD (LQCD) calculations
We have studied the behavior of strongly interacting matter under an external constant magnetic field in the context of nonlocal NJL model
Summary
In the last few years to account for the IMC [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26], the mechanism behind this effect is not yet fully understood With this motivation, in this work we study the behavior of strongly interacting matter under an external magnetic field in the framework of nonlocal chiral quark models. We will study the magnetic susceptibility of the QCD vacuum in the limit of small magnetic field within a nonlocal Polyakov-NJL (PNJL) model that includes wave function renormalization (WFR)
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