Effective meson masses, effective meson-nucleon couplings and neutron star radii
Abstract
Using the generalized mean field theory, we have studied the relation among the effective meson masses, the effective meson-nucleon couplings and the equation of state (EOS) in asymmetric nuclear matter. If the effective omega-meson mass becomes smaller at high density, the EOS becomes stiffer. However, if we require that the omega-meson mean field is proportional to the baryon density, the effective omega-nucleon coupling automatically becomes smaller at the same time as the effective omega-meson mass becomes smaller. Consequently, the EOS becomes softer. A similar relation is found for the effective rho-meson mass and the effective rho-nucleon coupling. We have also studied the relation among the effective meson masses, the effective meson-nucleon couplings and a radius R of a neutron star. The R depends somewhat on the value of the effective omega-meson mass and the effective omega-nucleon coupling.
Keywords
Cite
@article{arxiv.nucl-th/0407004,
title = {Effective meson masses, effective meson-nucleon couplings and neutron star radii},
author = {Kunito Tuchitani and Yasushi Horinouchi and Taihei Iwamitsu and Ken-ichi Makino and Nobuo Noda and Hiroaki Kouno and Akira Hasegawa and Masahiro Nakano},
journal= {arXiv preprint arXiv:nucl-th/0407004},
year = {2009}
}
Comments
29pages, 24 figures