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Magnetic field dependent ’t Hooft determinant extended Nambu–Jona-Lasinio model

Authors: João Moreira, Pedro Costa, and Tulio E. Restrepo

Ref.: Phys. Rev. D 102, 014032-10 (2020)

Abstract: We study the implications of recent lattice QCD results for the magnetic field dependence of the quarks dynamical masses on the ’t Hooft determinant extended Nambu – Jona-Lasinio model in the light and strange quark sectors (up, down and strange). The parameter space is constrained at vanishing magnetic field, using the quarks dynamical masses and the meson spectra, whereas at nonvanishing magnetic field strength the dependence of the dynamical masses of two of the quark flavors is used to fit a magnetic field dependence on the model couplings, both the four-fermion Nambu–Jona-Lasinio interaction and the six-fermion ’t Hooft flavor determinant. We found that this procedure reproduces the inverse magnetic catalysis, and the strength of the scalar coupling decreases with the magnetic field, while the strength of the six-fermion ’t Hooft flavor determinant increases with the magnetic field.

DOI: 10.1103/PhysRevD.102.014032