تقرير
Strangeness and $\Delta$ resonance in compact stars with relativistic-mean-field models
| العنوان: | Strangeness and $\Delta$ resonance in compact stars with relativistic-mean-field models |
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| المؤلفون: | Sun, Ting-Ting, Zhang, Shi-Sheng, Zhang, Qiu-Lan, Xia, Cheng-Jun |
| المصدر: | Phys. Rev. D 99, 023004 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Astrophysics Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Theory, Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We explore the effects of strangeness and $\Delta$ resonance in baryonic matter and compact stars within the relativistic-mean-field (RMF) models. The covariant density functional PKDD is adopted for $N$-$N$ interaction, parameters fixed based on finite hypernuclei and neutron stars are taken for the hyperon-meson couplings, and the universal baryon-meson coupling scheme is adopted for the $\Delta$-meson couplings. In light of the recent observations of GW170817 with the dimensionless combined tidal deformability $197 \leq \bar{\Lambda}\leq 720$, we find it is essential to include the $\Delta$ resonances in compact stars, and small $\Delta$-$\rho$ coupling $g_{\rho \Delta}$ is favored if the mass $2.27{}_{-0.15}^{+0.17}\ M_\odot$ of PSR J2215+5135 is confirmed. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.99.023004 |
| URL الوصول: | http://arxiv.org/abs/1808.02207 |
| رقم الأكسشن: | edsarx.1808.02207 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.99.023004 |
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