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Microscopic nuclear equation of state with three-body forces and neutron star structure

文献类型：会议论文

作者Lombardo, U.1; Burgio, G.F.2; Schulze, H.-J.2; Zuo, W.3; Zhou, X.R.4
出版日期2004
会议地点Tours, France
卷号704
DOI10.1063/1.1737143
页码473-482
英文摘要The equation of state (EOS) of nuclear matter is discussed within the Brueckner-Bethe-Goldstone approach. First the energy per particle E/A is calculated in the Brueckner-Hartree-Fock limit with the Argonne v18 potential, using the continuous choice as auxiliary potential. Then, the contribution of three-body clusters is determined by solving the Bethe-Faddeev equation, and the equivalence with the same calculations based on the standard choice as auxiliary potential, is demonstrated. In spite of reaching a quite good convergence of the hole-line expansion, the resulting EOS does not fit the empirical saturation density (ρ0 = 0.17 fm-3). To this end, three-body forces (TBF) are introduced. A first class of microscopic TBF comprises effects due to NN virtual excitations via σ and ω-meson exchanges (the main relativistic correction to Brueckner theory), the 2π-exchange, and the virtual excitation of the lowest nucleonic resonance N∗(1440). We compare with a phenomenological TBF, involving two parameters adjusted on the saturation density and energy. Next, using microscopic or phenomenological TBF, the symmetry energy of nuclear matter is computed, allowing to determine the EOS of beta-stable and charge neutral matter, and the properties of neutron stars, in particular the mass-radius curve.
© 2004 American Institute of Physics.
会议录Tours Symposium on Nuclear Physics V; Tours 2003
会议录出版者American Institute of Physics Inc.
源URL[http://119.78.100.186/handle/113462/63959]  
专题中国科学院近代物理研究所
作者单位1.INFN-LNS, Dipartimento di Fisica, Via S. Sofia 62, Catania; I-95123, Italy
2.INFN Sezione di Catania, Via S. Sofia 64, Catania; I-95123, Italy
3.Institute of Modern Physics, CAS, Lanzhou; 730000, China
4.Department of Physics, Tsinghua University, Beijing; 100084, China
推荐引用方式
GB/T 7714		 Lombardo, U.,Burgio, G.F.,Schulze, H.-J.,et al. Microscopic nuclear equation of state with three-body forces and neutron star structure[C]. 见:. Tours, France.

入库方式： OAI收割

来源：近代物理研究所

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