arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.05758nucl-thastro-ph.HE
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从关联系统学约束核物质参数:平均场观点

Constraining nuclear matter parameters from correlation systematics:a mean-field perspective

B. K. Agrawal, Tuhin Malik, J. N. De, S. K. Samaddar

摘要:

核物质参数定义了核物质状态方程(EoS),它们表现为对称和非对称核物质饱和密度附近的膨胀系数。我们回顾了它们与有限核和中子星在平均场框架内的几个性质的相关性。通过与有限核的选择性性质的紧密联系,发现低阶核物质参数,如每个核子的结合能、不可压缩性和对称性能系数,都被限制在很窄的范围内.从核物质参数与中子星观测值的相关性,我们进一步审查如何精确的中子星半径和潮汐变形的质量范围$1 - 2 M_\odot$的知识可能有助于铸造他们在更窄的范围。然而,对称核物质EoS的密度斜率、对称能曲率或偏度等序参量存在较大的不确定性。从这些高阶核物质参数与低阶参数之间的相互关系出发,我们探讨了如何使它们达到更协调的界限。

英文摘要:

The nuclear matter parameters define the nuclear equation of state (EoS), they appear as coefficients of expansion around the saturation density of symmetric and asymmetric nuclear matter. We review their correlations with several properties of finite nuclei and of neutron stars within mean-field frameworks. The lower order nuclear matter parameters such as the binding energy per nucleon, incompressibility and the symmetry energy coefficients are found to be constrained in narrow limits through their strong ties with selective properties of finite nuclei. From the correlations of nuclear matter parameters with neutron star observables, we further review how precision knowledge of the radii and tidal deformability of neutron stars in the mass range $1 - 2 M_\odot$ may help cast them in narrower bounds. The higher order parameters such as the density slope and the curvature of the symmetry energy or the skewness of the symmetric nuclear matter EoS are, however, plagued with larger uncertainty. From inter-correlation of these higher order nuclear matter parameters with lower order ones, we explore how they can be brought to more harmonious bounds.

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