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arXiv 1201.3758astro-ph.HE
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夸克团恒星:结构

Quark-cluster Stars: the structure

Xiaoyu Lai, Renxin Xu

摘要:

虽然第一颗脉冲星的发现已有40多年的历史,但脉冲星的性质仍存在争议。一般来说,常规中子星和非主流夸克星是描述中子星内部结构的两类模型,前者主要由强子组成,后者是一种特殊的物质,其状态方程应该在夸克而不是强子的水平上理解。为了从理论和观测两个角度建立一个更符合实际的模型,我们推测,类星体可能是由上夸克、下夸克和奇异夸克数目几乎相等的夸克团组成的“夸克团星”。夸克物质的聚集可能是现实致密恒星内部夸克之间强耦合的结果。最轻的夸克团可能是H-二重子,而夸克团也可能是更重的夸克。超核凝聚态本质上与非微扰量子色动力学(QCD)有关,仅通过QCD理论计算很难得到严格的结果,但我们希望天体物理观测能帮助我们得到最终的结果。

英文摘要:

The nature of pulsar-like compact stars is still in controversy although the first pulsar was found more than 40 years ago. Generally speaking, conventional neutron stars and non-mainstream quark stars are two types of models to describe the inner structure of pulsars, with the former composed mainly of hadrons and the latter of a peculiar kind of matter whose state equation should be understood in the level of quarks rather than hadrons. To construct a more realistic model from both theoretical and observational points of view, we conjecture that pulsars could be "quark-cluster stars" which are composed of quark-clusters with almost equal numbers of up, down and strange quarks. Clustering quark matter could be the result of strong coupling between quarks inside realistic compact stars. The lightest quark clusters could be of H-dibaryons, while quark clusters could also be heavier with more quarks. Being essentially related to the non-perturbative quantum-chromo dynamics (QCD), the state of supra-nuclear condensed matter is really difficult to obtain strictly by only theoretical QCD-calculations, and we expect, nevertheless, that astrophysical observations could help us to have a final solution.

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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