Cold magnetized quark matter at finite density in a nonlocal chiral quark model

FERRARIS, S.A.; GOMEZ DUMM, D.; GRUNFELD, A.G.; SCOCCOLA, N.N.

EUROPEAN PHYSICAL JOURNAL A - HADRONS AND NUCLEI

SPRINGER

Año: 2021 vol. 57

1434-6001

We study the behavior of two-flavor dense quark matter under the influence of an external magnetic field in the framework of a nonlocal chiral quark model with separable interactions. The nonlocality is incorporated in the model by using a Gaussian form factor. It is found that for low and moderate values of magnetic field there is a decrease of the critical chiral restoration chemical potential μc, i.e. an inverse magnetic catalysis effect is observed. For larger values of eB the behavior of μc becomes more or less flat, depending on the parametrization. Within the considered parametrization range we do not find a significant growth of the critical chemical potential for large magnetic fields, as occurs in the case of the local NJL model.