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- W4248585905 abstract "Abstract The study of dense matter at ultra-high density has a very long history, which is meaningful for us to understand not only cosmic events in extreme circumstances but also fundamental laws of physics. In compact stars at only a few nuclear densities but low temperature, quarks could be interacting strongly with each other. That might produce quarks grouped in clusters, although the hypothetical quark-clusters in cold dense matter have not been confirmed due to the lack of both theoretical and experimental evidence. A so-called H -cluster matter is proposed in this paper as the nature of dense matter in reality. Motivated by recent lattice QCD simulations of the H -dibaryons (with structure uuddss ), we are therefore considering here a possible kind of quark-clusters, H -clusters, that could emerge inside compact stars during their initial cooling, as the dominant components inside (the degree of freedom could then be H -clusters there). We study the stars composed of H -clusters, i.e., H -cluster stars, and derive the dependence of their maximum mass on the in-medium stiffening effect, showing that the maximum mass could be well above 2 M ⊙ as observed and that the resultant mass-radius relation fits the measurement of the rapid burster under reasonable parameters. Besides a general understanding of different manifestations of compact stars, we expect further observational and experimental tests for the H -cluster stars in the future." @default.
- W4248585905 created "2022-05-12" @default.
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- W4248585905 date "2012-08-01" @default.
- W4248585905 modified "2023-10-16" @default.
- W4248585905 title "H-cluster stars" @default.
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- W4248585905 doi "https://doi.org/10.1017/s1743921312024416" @default.
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