Effect of the mesons σ* and Φ and the variety of UΣ(N) on the transition density of hyperon stars

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ZHAO Xian-Feng and ZHANG Hua. Effect of the mesons σ* and Φ and the variety of UΣ(N) on the transition density of hyperon stars[J]. Chinese Physics C, 2010, 34(11): 1704-1708. doi: 10.1088/1674-1137/34/11/007
ZHAO Xian-Feng and ZHANG Hua. Effect of the mesons σ* and Φ and the variety of UΣ(N) on the transition density of hyperon stars[J]. Chinese Physics C, 2010, 34(11): 1704-1708.  doi: 10.1088/1674-1137/34/11/007 shu
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Received: 2010-01-15
Revised: 2010-06-03
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Effect of the mesons σ* and Φ and the variety of UΣ(N) on the transition density of hyperon stars

    Corresponding author: ZHAO Xian-Feng,

Abstract: 

The effect of the mesons σ* and Φ and the variety of UΣ(N) on the transition density of hyperon stars is examined within the framework of relativistic mean field theory for the baryon octet {n, p, Λ, Σ, Σ0, Σ+, Ξ and Ξ0} system. It is found that, compared with that without considering the mesons σ* and Φ, the transition density of hyperon stars decreases, the critical baryon density that hyperons Σ, Σ0, Σ+, Ξ and Ξ0 appears to decrease too, but for Λ the effect is not obvious. As UΣ(N) goes up, the critical baryon density of Σ+, Σ0 and Σ increases, that of Ξ0 decreases and that of Λ and Ξ is fixed. In addition, it is found that the variety of UΣ(N) almost does not influence the transition density.

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