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arXiv 1507.07288nucl-th
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夸克模型核子-核子相互作用的核物质状态方程

Nuclear matter equation of state from a quark-model nucleon-nucleon interaction

K. Fukukawa, M. Baldo, G. F. Burgio, L. Lo Monaco, H. -J. Schulze

摘要:

从一个真实的核子-核子相互作用组分夸克模型出发,在Bethe-Brueckner-Goldstone方法下,导出了直到三孔线水平的核物质的状态方程,无需引入三核子力.为了估计计算的不确定性,考虑和比较了单粒子势的间隙和连续选择。所得状态方程与饱和点、不可压缩性、低密度对称能及其饱和斜率的唯象分析以及从重离子碰撞流场数据中提取的高密度压力是一致的。虽然在高密度区的间隙选择的对称能量明显更大,但由连续选择状态方程和间隙选择状态方程得出的最大中子星质量是相似的,接近两个太阳质量,这再次与最近的观测数据相一致。与其他微观状态方程的比较和讨论。

英文摘要:

Starting from a realistic constituent quark model for the nucleon-nucleon interaction, we derive the equation of state (EOS) of nuclear matter within the Bethe-Brueckner-Goldstone approach up to three-hole-line level, without need to introduce three-nucleon forces. To estimate the uncertainty of the calculations both the gap and the continuous choices for the single-particle potential are considered and compared. The resultant EOS is compatible with the phenomenological analysis on the saturation point, the incompressibility, the symmetry energy at low density and its slope at saturation, together with the high-density pressure extracted from flow data on heavy ion collisions. Although the symmetry energy is appreciably larger in the gap choice in the high-density region, the maximum neutron star masses derived from the continuous-choice EOS and the gap-choice EOS are similar and close to two solar masses, which is again compatible with recent observational data. Comparison with other microscopic EOS is presented and discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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