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arXiv 2008.06932nucl-thastro-ph.HE
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强相互作用凝聚物质的袋模型

A bag model of matter condensed by the strong interaction

Zhi-Qiang Miao, Cheng-Jun Xia, Xiao-Yu Lai, Toshiki Maruyama, Ren-Xin Xu, En-Ping Zhou

摘要:

受各种天体物理现象的启发,人们认为脉冲星状致密星完全由奇异夸克(具有三光味对称性的夸克团)和少量电子组成。为了更好地约束奇异子星的性质,我们提出了一个用强相互作用(即,强凝聚态物质)在2味(核子)和3味(超子,奇异等)。场景模型参数的校准再现的饱和特性的核物质,这是后来应用到超子物质和奇异子物质。与重子物质相比,如果奇异子中含有大量的价夸克,则奇异子物质的每重子导出能量会降低,从而使物态方程变硬,从而使奇异子星的最大质量增大。在大的参数空间中,由链接袋模型预测的奇异星的最大质量和潮汐形变与当前的天体物理约束是一致的。发现奇异子星的最大质量可达$\sim 2.5M_\odot$,而$1.4M_\odot$奇异子星的潮汐变形能力在$180\lesssim Λ_{1.4} \lesssim 340$范围内。

英文摘要:

Inspired by various astrophysical phenomenons, it is suggested that pulsar-like compact stars are comprised entirely of strangeons (quark-clusters with three-light-flavor symmetry) and a small amount of electrons. In order to better constrain the properties of strangeon stars, we propose a linked bag model to describe the condensed matter by the strong interaction (i.e., strong condensed matter) in both 2-flavoured (nucleons) and 3-flavoured (hyperons, strangeons, etc.) scenarios. The model parameters are calibrated to reproduce the saturation properties of nuclear matter, which are later applied to hyperon matter and strangeon matter. Compared with baryon matter, the derived energy per baryon of strangeon matter is reduced if the strangeon carries a large number of valence quarks, which stiffens the equation of state and consequently increases the maximum mass of strangeon stars. In a large parameter space, the maximum mass and tidal deformability of strangeon stars predicted by the linked bag model are consistent with the current astrophysical constraints. It is found that the maximum mass of strangeon stars can be as large as $\sim 2.5M_\odot$, while the tidal deformability of a $1.4M_\odot$ strangeon star lies in the range of $180\lesssim Λ_{1.4} \lesssim 340$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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