Nuclear matter properties with nucleon-nucleon forces up to fifth order in the chiral expansion

Jinniu Hu; Ying Zhang; Evgeny EpelbaumUlf-G. Mei?nerJie Meng

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Nuclear matter properties with nucleon-nucleon forces up to fifth order in the chiral expansion

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The properties of nuclear matter are studied using state-of-the-art nucleon-nucleon forces up to fifth order in chiral effective field theory. The equations of state of symmetric nuclear matter and pure neutron matter are calculated in the framework of the Brueckner-Hartree-Fock theory. We discuss in detail the convergence pattern of the chiral expansion and the regulator dependence of the calculated equations of state and provide an estimation of the truncation uncertainty. For all employed values of the regulator, the fifth-order chiral two-nucleon potential is found to generate nuclear saturation properties similar to the available phenomenological high precision potentials.We also extract the symmetry energy of nuclear matter, which is shown to be quite robust with respect to the chiral order and the value of the regulator.

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来源
《Physical review, C》 |2017年第3期|034307-1-034307-7|共7页
作者
Jinniu Hu; Ying Zhang; Evgeny EpelbaumUlf-G. Mei?nerJie Meng;
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作者单位

School of Physics, Nankai University, Tianjin 300071, China;

Department of Physics, School of Science, Tianjin University, Tianjin 300072, China;

Institut für Theoretische Physik II, Ruhr-Universit?t Bochum, D-44780 Bochum, GermanyHelmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universit?t Bonn, D-53115 Bonn, GermanySchool of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;

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正文语种英语
中图分类原子核物理学、高能物理学;
关键词
Nuclear matter; properties; nucleon-nucleon forces;

Nuclear matter properties with nucleon-nucleon forces up to fifth order in the chiral expansion

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