Nuclear matter properties and relativistic mean-field theory |
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Authors: | KC Chung CS Wang AJ Santiago JW Zhang |
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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, China, CN |
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Abstract: | 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 K
s has positive sign which is opposite to expectations based on the nonrelativistic model. In almost all parameter sets there
exists a critical point (,), where the minimum and the maximum of the equation of state are coincident and the incompressibility equals zero, falling
into ranges 0.014fm^-3 < < 0.039fm^-3 and 0.74 < ≤0.95; for a few parameter sets there is no critical point and the pure neutron matter is predicted to be bound. The maximum
mass M
NS of neutron stars is predicted in the range 2.45M
?M
NS? 3.26M
, the corresponding neutron star radius R
NS is in the range 12.2km ?R
NS? 15.1km.
Received: 5 May 2000 / Accepted: 28 November 2000 |
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Keywords: | PACS 21 65 +f Nuclear matter – 24 10 Jv Relativistic models – 26 60 +c Nuclear matter aspects of neutron stars |
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