Determination of nonlinear σ-ω-ρ model parameters in the relativistic mean-field theory by nuclear-matter properties |
| |
Authors: | KC Chung CS Wang AJ Santiago JW Zhang |
| |
Institution: | (1) Instituto de Física, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20559-900, Brazil, BR;(2) Department of Technical Physics, Peking University, Beijing 100871, PRC, CN |
| |
Abstract: | The parameters of the σ-ω-ρ model in the relativistic mean-field theory with nonlinear σ-meson self-interaction are determined
by nuclear-matter properties, which are taken as those extracted by fits to data based on nonrelativistic nuclear models.
The values of the relevant parameters are C
σ
2∼ 94, C
ω
2∼ 32, C
ρ
2∼ 26, b∼ - 0.09, c∼ 1, and the σ-meson mass m
σ∼ 370 MeV, while the value of the calculated nuclear- surface thickness is t∼ 1.4 fm. The field system is shown to be stable, since the σ-meson self-interaction energy is a lower bound in this whole
parameter region with positive c. On the other hand, the effective nucleon mass M* is larger than 0.73M, if the symmetry incompressibility Ks is assumed to be negative and the nuclear-matter incompressibility K0 is kept less than 300 MeV.
Received: 27 June 2001 / Accepted: 5 October 2001 |
| |
Keywords: | PACS 21 65 +f Nuclear matter – 24 10 Jv Relativistic models |
本文献已被 SpringerLink 等数据库收录! |
|