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	Delineating effects of tensor force on the density dependence of nuclear symmetry energy
	Xu, Chang ; Li, Ang ; Li, Bao-An ; Li A(李昂)
	2013
关键词	Electron gas
英文摘要	Conference Name:11th International Conference on Nucleus-Nucleus Collisions, NN 2012. Conference Address: San Antonio, TX, United states. Time:May 27, 2012 - June 1, 2012.; In this talk, we report results of our recent studies to delineate effects of the tensor force on the density dependence of nuclear symmetry energy within phenomenological models. The tensor force active in the isosinglet neutron roton interaction channel leads to appreciable depletion/population of nucleons below/above the Fermi surface in the single-nucleon momentum distribution in cold symmetric nuclear matter (SNM). We found that as a consequence of the high momentum tail in SNM the kinetic part of the symmetry energy E kinsym(ρ) is significantly below the well-known Fermi gas model prediction of approximately 125(ρ/ρ0) 2/3. With about 15% nucleons in the high momentum tail as indicated by the recent experiments at J-Lab by the CLAS Collaboration, the E kinsym(ρ) is negligibly small. It even becomes negative when more nucleons are in the high momentum tail in SNM. These features have recently been confirmed by three independent studies based on the state-of-the-art microscopic nuclear many-body theories. In addition, we also estimate the second-order tensor force contribution to the potential part of the symmetry energy. Implications of these findings in extracting information about nuclear symmetry energy from nuclear reactions are discussed briefly.
语种	英语
出处	http://dx.doi.org/10.1088/1742-6596/420/1/012090
出版者	Institute of Physics Publishing
内容类型	其他
源URL	[http://dspace.xmu.edu.cn/handle/2288/86120]
专题	物理技术－会议论文
推荐引用方式 GB/T 7714	Xu, Chang,Li, Ang,Li, Bao-An,et al. Delineating effects of tensor force on the density dependence of nuclear symmetry energy. 2013-01-01.

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