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首页> 外文期刊>Physical review, C >Effects of the nucleon radius on neutron stars in a quark mean field model
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Effects of the nucleon radius on neutron stars in a quark mean field model

机译：核仁半径对夸克平均场模型中子恒星的影响

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摘要

We study the effects of free space nucleon radius on nuclear matter and neutron stars within the framework of the quark mean field model. The nucleon radius is treated self-consistently with this model, where quark confinement is adjusted to fit different values of nucleon radius. Corrections due to center-of-mass motion, quark-pion coupling, and one gluon exchange are included to obtain the nucleon mass in vacuum. The meson coupling constants that describe the behavior of the many-body nucleonic system are constructed by reproducing the empirical saturation properties of nuclear matter, including the recent determinations of symmetry energy parameters. Our results show that the nucleon radius in free space has negligible effects on the nuclear matter equation of state and neutron star mass-radius relations, which is different from the conclusion drawn in previous studies. We further explore that the sensitivity of star radius on the nucleon radius found in earlier publications is actually from the symmetry energy and its slope.
机译：我们在夸克平均场模型的框架内研究自由空间核仁半径对核物质和中子恒星的影响。通过该模型自一致地处理核子半径，其中调整夸克限制以适应核子半径的不同值。包括Quark-Pion耦合和一个胶合交换导致的校正以获得真空中的核子质量。通过再现核物质的经验饱和度来构建描述许多身体核子系统的行为的Meson耦合常数，包括最近对称能量参数的确定。我们的研究结果表明，自由空间中的核子半径对状态和中子星形大气 - 半径关系的核物质方程具有可忽略的影响，这与先前研究中的结论不同。我们进一步探讨了先前出版物中发现的核子半径上的星半径的敏感性实际上是对称能量及其坡度。

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