Effect of Mesons f0(975) and $\phi(1020)$ and Variety of $U_\Xi^{(N)}$ on Properties of Neutron Star Matter |
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| Authors: | TAN Yu-Hong SUN Bao-Xi LI Lei NING Ping-Zhi |
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| Institution: | 1. Theoretical Physics Division, Nankai Institute of Mathematics, Nankai University, Tianjin 300071, China ;2. Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China ;3. Department of Physics, Nankai University, Tianjin 300071, China |
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| Abstract: | We examine the effect of adding mesons f0(975) and $\phi(1020)$
as well as the variety of $U_\Xi^{(N)}$ (the potential well depth
of $\Xi$ in nuclear matter) from -10 MeV to -28 MeV on the
extent of the particles participation and the properties of the
neutron star in the relativistic mean field model. We find that
considering the contribution of f0 and $\phi$ mesons, the
equation of state of the neutron star turns soft, the maximum
mass reduces while the corresponding radius increases. $\Xi^-$
hyperons appear at lower density as $U_\Xi^{(N)}$ becomes deeper, and the
variety of $U_\Xi^{(N)}$ has little effect on the equation of
state and the properties of the neutron star. |
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| Keywords: | neutron star equation of state |
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