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arXiv 1608.05615nucl-thastro-ph.HE
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从手征双核子和三核子到N $^3$ LO的中子物质计算

Neutron matter from chiral two- and three-nucleon calculations up to N$^3$LO

C. Drischler, A. Carbone, K. Hebeler, A. Schwenk

摘要:

中子物质是一个理想的实验室核相互作用的手征有效场论,因为所有的贡献预测到次-主导秩序(N $^3$ LO)的手征展开。利用三核子(3 N)相互作用分波分解的最新进展,我们首次将N $^3$ LO 3 N相互作用纳入到多体微扰理论(MBPT)的三阶和自洽格林函数理论(SCGF)中.使用这两个互补的多体框架,我们提供了改进的预测中子物质在零温度下的状态方程,也系统地分析了不同的手征EFT相互作用的多体收敛。此外,我们提出了一个扩展的正常有序框架有限的温度。这些进展为改进富中子物质的计算开辟了道路,包括对天体物理应用的理论不确定性的估计。

英文摘要:

Neutron matter is an ideal laboratory for nuclear interactions derived from chiral effective field theory since all contributions are predicted up to next-to-next-to-next-to-leading order (N$^3$LO) in the chiral expansion. By making use of recent advances in the partial-wave decomposition of three- nucleon (3N) forces, we include for the first time N$^3$LO 3N interactions in many-body perturbation theory (MBPT) up to third order and in self-consistent Green's function theory (SCGF). Using these two complementary many-body frameworks we provide improved predictions for the equation of state of neutron matter at zero temperature and also analyze systematically the many-body convergence for different chiral EFT interactions. Furthermore, we present an extension of the normal-ordering framework to finite temperatures. These developments open the way to improved calculations of neutron-rich matter including estimates of theoretical uncertainties for astrophysical applications.

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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