Farias, R. L. S.Gomes, K. P.Krein, G. [UNESP]Pinto, M. B.2015-03-182015-03-182014-08-11Physical Review C. College Pk: Amer Physical Soc, v. 90, n. 2, 6 p., 2014.0556-2813http://hdl.handle.net/11449/117041Although asymptotic freedom is an essential feature of QCD, it is absent in effective chiral quark models like the Nambu-Jona-Lasinio and linear sigma models. In this work we advocate that asymptotic freedom plays a key role in the recently observed discrepancies between results of lattice QCD simulations and quark models regarding the behavior of the pseudocritical temperature T-pc for chiral-symmetry restoration in the presence of a magnetic field B. We show that the lattice predictions that T-pc decreases with B can be reproduced within the Nambu-Jona-Lasinio model if the coupling constant G of the model decreases with B and the temperature. Without aiming at numerical precision, we support our claim by considering a simple ansatz for G that mimics the asymptotic-freedom behavior of the QCD coupling constant 1/alpha(s) similar to ln(eB/Lambda(2)(QCD)) for large values of B.6engArtigo10.1103/PhysRevC.90.025203WOS:000341166100009Acesso abertoWOS000341166100009.pdf