2023 Impact factor 2.6
Hadrons and Nuclei

Eur. Phys. J. A 9, 453-461

Nuclear matter properties and relativistic mean-field theory

K.C. Chung1 - C.S. Wang1,2 - A.J. Santiago1 - J.W. Zhang2

1 Instituto de Física, Universidade do Estado do Rio de Janeiro, Rio de Janeiro-RJ 20559-900, Brazil
2 Department of Technical Physics, Peking University, Beijing 100871, China

Received: 5 May 2000 / Revised version: 23 November 2000
Communicated by A. Molinari

Nuclear matter properties are calculated in the relativistic mean-field theory by using a number of different parameter sets. The result shows that the volume energy a1 and the symmetry energy J are around the acceptable values 16MeV and 30MeV, respectively; the incompressibility K0 is unacceptably high in the linear model, but assumes reasonable value if nonlinear terms are included; the density symmetry L is around 100MeV for most parameter sets, and the symmetry incompressibility Ks has positive sign which is opposite to expectations based on the nonrelativistic model. In almost all parameter sets there exists a critical point $(\rho_c,\delta_c)$, where the minimum and the maximum of the equation of state are coincident and the incompressibility equals zero, falling into ranges $0.014{fm^{-3}}<\rho_c<0.039{fm^{-3}}$ and $0.74<\delta_c\le0.95$; for a few parameter sets there is no critical point and the pure neutron matter is predicted to be bound. The maximum mass MNS of neutron stars is predicted in the range $2.45M_\odot\leq M_NS\leq 3.26M_\odot$, the corresponding neutron star radius RNS is in the range 12.2km $\leq R_NS\leq 15.1$km.

21.65.+f Nuclear matter - 24.10.Jv Relativistic models - 26.60.+c Nuclear matter aspects of neutron stars

Copyright Società Italiana di Fisica, Springer-Verlag 2000