A RELATIVISTIC EFFECTIVE MODEL WITH PARAMETERIZED COUPLINGS FOR NEUTRON STARS

作者：Perez Martinez Aurora; Perez Rojas Hugo; Manreza Paret Daryel; Mesquita Alexandre; Razeira Moises; Vasconcellos Cesar A Z; Gomes Rosana O; Hadjimichef Dimiter

来源：International Journal of Modern Physics E-Nuclear Physics, 2011, 20: 230-236.

DOI：10.1142/S021830131104030X

• Effective Relativistic Model
• Many-Body Forces
• Neutron Stars

We present a relativistic effective model with derivative couplings which includes genuine many-body forces simulated by nonlinear interaction terms involving scalar-isoscalar (sigma, sigma*), vector-isoscalar (omega, phi), vector-isovector (rho), scalar-isovector (delta) mesons. The effective model presented in this work has a philosophy quite similar to the original version of the model with parameterized couplings. But unlike that, in which the parametrization is directly inserted in the coupling constants of the Glendenning model, we present here a method for the derivation of the parametric dependence of the coupling terms, in a way that allows in one side to consistently justify this parametrization and in the other to extend in a coherent way the range of possibilities of parameterizations in effective models with derivative couplings. The extended model is then applied to the description of the mass of neutron stars.

• 出版日期2011-12