The role of asymptotic freedom for the pseudocritical temperature in magnetized quark matter

37th Brazilian Meeting on Nuclear Physics

Farias, R.L.S.^1,2 ; Gomes, K.P.^1 ; Krein, G.^3 ; Pinto, M.B.^4

Departamento de Ciências Naturais, Universidade Federal de São João Del Rei, São João Del Rei, MG

36301-000, Brazil^1

Departamento de Física, Universidade Federal de Santa Maria, Santa-Maria, RS

97105-900, Brazil^2

Instituto de Física Teórica, Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, São Paulo, SP

01140-070, Brazil^3

Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina

88040-900, Brazil^4

关键词: Asymptotic freedom;    Chiral symmetry restoration;    Coupling constants;    Essential features;    Nambu-Jona-Lasinio model;    Pseudo-critical temperature;    Quark matter;    Quark model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/630/1/012046/pdf
DOI  :  10.1088/1742-6596/630/1/012046

来源: IOP

【 摘 要 】

Motivated by discrepancies observed between lattice QCD simulations and quark models regarding the behavior of the pseudo critical temperature for chiral symmetry restoration as a function of the magnetic field B, we investigate the effects of a running the quark coupling constant G with temperature T and the magnetic field B in the context of the Nambu-Jona- Lasinio model(NJL). Our point that when asymptotic freedom, an essential feature of QCD and absent in the model, is included through a running of G with T and B results from the NJL model can be brought in qualitative agreement with lattice QCD simulations.