η-nucleus bound states in nuclei |
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引用本文: | 王滕滕.η-nucleus bound states in nuclei[J].中国物理 C,2010,34(4):460-464. |
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作者姓名: | 王滕滕 |
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作者单位: | Institute of Theoretical Physics, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China |
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基金项目: | Supported by NSFC (10775012) |
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摘 要: | The binding energies εη and widths Гη of wmesic nuclei are calculated. We parameterize the η self-energy in the nuclear medium as a function of energy and density. We find that the single-particle energies are sensitive to the scattering length, and increase monotonically with the nucleus. The key point for the study of η-nucleus bound states is the η-nuclear optical potential. We study the s-wave interactions of η mesons in a nuclear medium and obtain the optical potential Uη ≈ -72 MeV. Comparing our results with the previous results, we find that the ηN scattering length aηN is indeed important to the calculations. With increasing nuclear density the effective mass of the η meson decreases.
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关 键 词: | 束缚态 单粒子能量 散射长度 密度函数 相互作用 有效质量 核介质 光学势 |
收稿时间: | 2009-5-12 |
修稿时间: | 2009-8-9 |
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