Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory.
Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory.
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DOI：
10.1103/physrevlett.110.032504
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发表时间：
2012-05
影响因子：
8.6
通讯作者：
I. Tews;T. Krüger;K. Hebeler;A. Schwenk
中科院分区：
文献类型：
--
作者：
I. Tews;T. Krüger;K. Hebeler;A. Schwenk
中子物质为手征有效场论提供了一个独特的体系，因为中子之间的所有多体力都被预测为次-首阶（N（3）LO）。本文首次给出了中子物质能量的完整的N（3）LO计算。这包括第一次的次主导的三核子力和所有主导的四核子力。我们发现N（3）LO三核子力的贡献相对较大。我们的研究结果提供了控制理论不确定性的天体物理学中的富中子物质的约束。
Neutron matter presents a unique system for chiral effective field theory because all many-body forces among neutrons are predicted to next-to-next-to-next-to-leading order (N(3)LO). We present the first complete N(3)LO calculation of the neutron matter energy. This includes the subleading three-nucleon forces for the first time and all leading four-nucleon forces. We find relatively large contributions from N(3)LO three-nucleon forces. Our results provide constraints for neutron-rich matter in astrophysics with controlled theoretical uncertainties.