197 research outputs found
Development of distribution map using the internet: development of course unit "the familiar area where we have lived" in geographical field under junior high school social studies
Effective meson masses, effective meson-nucleon couplings and neutron star radii
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.Comment: 29pages, 24 figure
ブンショウ コウセイ ニ チャクモク シタ ヒョウロンブン ノ ヨミ ノ フカマリ ニ カンスル コウサツ チュウガッコウ ダイ2ガクネン コクゴ ブンショウ ノ ミリョク オ サグロウ ノ ジュギョウ ブンセキ オ トオシテ
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