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arXiv · 2402.14288

Properties of H particle-admixed compact star

Xuhao Wu·Liming Wang·Hong-Tao An·Min Ju·Hong Shen
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Abstract

We explore the potential manifestation of a hexaquark, the H particle, as a constituent within neutron stars. The H particle, characterized by a quark composition of $uuddss$, is constructed using the framework of Chromomagnetic Interaction (CMI). Specifically, we contemplate the flavor-singlet state H with $J^P=0^+$. Our computations indicate that the three-flavor hexaquark state, the H particle, possesses a lower mass of $2212.7~\rm{MeV}$ in comparison to the $d^*(2380)$, implying greater stability than the two-flavor $d^*(2380)$. The analysis involving the H particle is carried out using the relativistic mean-field (RMF) model. We investigate the influence of H particle couplings, a key factor in determining the system stability, and focus on the potential existence of H particle within neutron stars. We find that H particle could potentially endure as a stable constituent within neutron stars, and lead to a reduction of the maximum mass.

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Xuhao Wu, Liming Wang, Hong-Tao An, Min Ju, Hong Shen. 2024-02-22. Properties of H particle-admixed compact star. https://doi.org/10.1140/epjc/s10052-026-15303-0

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