Multi-Quark Clustering in Neutron-Star Matter from Color-Spin Molecular Dynamics
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866918430782783488 |
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| author | Yasutake, Nobutoshi Mukobara, Yuta Park, Aaron Lee, Su Houng Maruyama, Toshiki |
| author_facet | Yasutake, Nobutoshi Mukobara, Yuta Park, Aaron Lee, Su Houng Maruyama, Toshiki |
| contents | We study the equation of state of neutron-star matter with color-spin molecular dynamics. The calculation includes the internal color and spin degrees of freedom and their time evolution. The matter composition, including strangeness under beta equilibrium, is determined by energy minimization. We find two main trends. First, within the present CSMD framework and under the adopted clustering criterion along the stable neutron-star branch, isolated quark-like configurations do not appear; instead, color-magnetic interactions favor the self-consistent formation of multi-quark clusters. Within the same criterion, the cluster-size distribution is concentrated at quark numbers that are multiples of three, corresponding to integer baryon numbers. Second, the interaction between strange and light quarks has a strong impact on neutron-star radii. This suggests that future radius measurements may help constrain flavor-sector interactions, including those involving strangeness. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_05472 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multi-Quark Clustering in Neutron-Star Matter from Color-Spin Molecular Dynamics Yasutake, Nobutoshi Mukobara, Yuta Park, Aaron Lee, Su Houng Maruyama, Toshiki High Energy Astrophysical Phenomena Nuclear Theory We study the equation of state of neutron-star matter with color-spin molecular dynamics. The calculation includes the internal color and spin degrees of freedom and their time evolution. The matter composition, including strangeness under beta equilibrium, is determined by energy minimization. We find two main trends. First, within the present CSMD framework and under the adopted clustering criterion along the stable neutron-star branch, isolated quark-like configurations do not appear; instead, color-magnetic interactions favor the self-consistent formation of multi-quark clusters. Within the same criterion, the cluster-size distribution is concentrated at quark numbers that are multiples of three, corresponding to integer baryon numbers. Second, the interaction between strange and light quarks has a strong impact on neutron-star radii. This suggests that future radius measurements may help constrain flavor-sector interactions, including those involving strangeness. |
| title | Multi-Quark Clustering in Neutron-Star Matter from Color-Spin Molecular Dynamics |
| topic | High Energy Astrophysical Phenomena Nuclear Theory |
| url | https://arxiv.org/abs/2604.05472 |