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Neutron matter from chiral two- and three-nucleon calculations up to (NLO)-L-3

机译:中子物质从手性两核和三核计算到(NLO)-L-3

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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 ((NLO)-L-3) 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 (NLO)-L-3 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.
机译:中子物质是来自手性有效场理论的核相互作用的理想实验室,因为所有贡献都预测到手性扩张中的下一次下一至下一至下一端的秩序((NLO)-L-3)。 通过利用近期三核(3N)力的部分波分解的进展,我们包括在许多身体扰动理论(MBPT)中的第一次(NLO)-L-3 3N相互作用,最高为第三顺序 在自我一致的绿色功能理论(SCGF)中。 使用这两个互补的许多身体框架,我们为零温度的中子物质方程提供了改进的预测,并且还系统地分析了不同的手性EFT相互作用的许多身体收敛。 此外,我们向有限温度展示了正常排序框架的延伸。 这些发展开辟了改善中子物质的计算的方式,包括估计天体物理应用的理论不确定性。

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