Calculations of nuclear quasi-bound states based on chiral meson-baryon amplitudes

详细信息	查看全文 | 推荐本文 |

• 作者：Daniel Gazda ; Ji艡í ; Mare&scaron ; ; ^{mares@ujf.cas.cz}
• 关键词：K&minus ; nuclear states ; Mesic nuclei ; Antikaon&ndash ; nucleus interaction
• 刊名：Nuclear Physics A
• 出版年：2012
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：1 May, 2012
• 卷：881
• 期：Complete
• 页码：159-168
• 文件大小：240 K

摘要

In-medium scattering amplitudes developed within a new chirally motivated coupled-channel model due to Ciepl媒 and Smejkal that fits the recent SIDDHARTA kaonic hydrogen 1s level shift and width are used to construct nuclear potentials for calculations of nuclear quasi-bound states. The strong energy and density dependence of scattering amplitudes at and near threshold leads to potential depths . Self-consistent calculations of all nuclear quasi-bound states, including excited states, are reported. Model dependence, polarization effects, the role of p-wave interactions, and two-nucleon absorption modes are discussed. The absorption widths are comparable or even larger than the corresponding binding energies for all nuclear quasi-bound states, exceeding considerably the level spacing. This discourages search for nuclear quasi-bound states in any but the lightest nuclear systems.