Nucleon effective mass in hot dense matter

Nucleon effective mass in hot dense matter
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热致密物质中的核有效质量

DOI:
10.1103/physrevc.101.065801
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发表时间:
2020-01
期刊:
影响因子:
3.1
通讯作者:
Schulze H-J.
Schulze H-J.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shang Xinle;Li Ang;Miao Zhiqiang;Burgio G.-F.;Schulze H-J.

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用Brueckner-Hartree-Fock多体方法研究了有限温度下的核子有效质量。报道了包括微观三体力在内的Argonne{V}_{18}$相互作用的自洽计算,计算的温度和质子分数最高可达核饱和密度的数倍。我们的计算是基于对质心动量的精确处理,而不是以前工作中采用的平均动量近似。我们详细讨论了温度以及三体力、密度和同位旋不对称性的影响。考虑到这些相关性,我们还提供了有效质量的解析拟合度。根据数学稳定物质的计算结果,简要讨论了温度对中子星冷却的影响。
Nucleon effective masses are studied in the framework of the Brueckner-Hartree-Fock many-body approach at finite temperature. Self-consistent calculations using the Argonne ${V}_{18}$ interaction including a microscopic three-body force are reported for varying temperature and proton fraction up to several times the nuclear saturation density. Our calculations are based on the exact treatment of the center-of-mass momentum instead of the average-momentum approximation employed in previous works. We discuss in detail the effects of the temperature together with those of the three-body force, the density, and the isospin asymmetry. We also provide an analytical fit of the effective mass taking these dependencies into account. The temperature effects on the cooling of neutron stars are briefly discussed based on the results for $\ensuremath{\beta}$-stable matter.
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