1305.4751 (Márcio Ferreira et al.)

Deconfinement and chiral restoration within the SU(3) PNJL and EPNJL
models in an external magnetic field    [PDF]

Márcio Ferreira, Pedro Costa, Débora P. Menezes, Constança Providência, Norberto Scoccola

The behavior of the quark condensates at zero chemical potential and finite temperature subject to an external magnetic field is studied within the three flavor Nambu-Jona-Lasinio model with Polyakov loop (PNJL) and an extension of it, the so-called entangled PNJL model (EPNJL). A comparison with recent lattice QCD data is performed. We present a possible mechanism to account for the inverse magnetic catalysis at finite temperature found in lattice calculations which so far cannot be reproduced in the context of effective chiral models. Such mechanism is based on the use of the EPNJL model with a magnetic field dependent scale parameter for the Polyakov loop potential.

View original: http://arxiv.org/abs/1305.4751