Hybrid stars from a constrained equation of state
arXiv:2112.05546 · doi:10.1051/epjconf/202225807001
Abstract
We determine, within a meta-model, the properties of the nuclear matter equation of state (EoS) that allow for a phase transition to deconfinement matter. It is shown that the properties that define the isoscalar channel are the ones that are affected, in particular, a phase transition implies much larger values of the skewness and kurtosis. The effect of multi-quark interaction channels in the description of the quark phase in hybrid stars is also studied. NS properties, such as the mass and radius of the quark core, show an interplay dependence between the 8-quark vector and the 4-quark isovector-vector interactions. We show that low mass NS, , may already contain a quark core, and satisfy all existing NS observational constraints. We discuss the strangeness content of the quark core and its influence on the speed of sound.
arXiv comment8 pages, 5 figures, Contribution to the Virtual Tribute to Quark Confinement and the Hadron Spectrum 2021 conference proceedings (vConf21)
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