$\delta$ meson effects on neutron stars in the modified quark-meson coupling model
| Autor: | Niu, Zhong-Ming, Gao, Chun-Yuan |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Int.J.Mod.Phys.E19:2247-2263,2010 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1142/S0218301310016636 |
| Popis: | The properties of neutron stars are investigated by including $\delta$ meson field in the Lagrangian density of modified quark-meson coupling model. The $\Sigma^-$ population with $\delta$ meson is larger than that without $\delta$ meson at the beginning, but it becomes smaller than that without $\delta$ meson as the appearance of $\Xi^-$. The $\delta$ meson has opposite effects on hadronic matter with or without hyperons: it softens the EOSes of hadronic matter with hyperons, while it stiffens the EOSes of pure nucleonic matter. Furthermore, the leptons and the hyperons have the similar influence on $\delta$ meson effects. The $\delta$ meson increases the maximum masses of neutron stars. The influence of $(\sigma^*,\phi)$ on the $\delta$ meson effects are also investigated. Comment: 10 pages, 6 figures, 4 tables |
| Databáze: | arXiv |
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