D-bar and B mesons in nuclear medium
D-bar and B mesons in nuclear medium
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核介质中的 D-bar 和 B 介子
DOI：
10.1103/physrevc.87.015202
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Yasui and K. Sudoh
中科院分区：
文献类型：
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作者：
Yong-Liang Ma;Masayasu Harada;Hyun Kyu Lee;Yongseok Oh;Byung-Yoon Park and Mannque Rho;酒井 一博;Kazuyuki Ogata;S. Yasui and K. Sudoh
我们讨论核介质中介子的质量改变。介子采用重夸克对称性，介子与核子之间的相互作用由π介子交换提供。我们发现介子的质量变化为负，因此介子被束缚在核介质中。作为应用，我们考虑具有介子的原子核，并研究每个原子核中介子的能级。我们还讨论了同位旋不对称核介质中的质量转移，并提出了核介质中aormeson周围同位旋密度分布的可能现象。我们发现 和 介子的质量位移具有很大的虚部，这将妨碍对原子核中 和 介子能级的精确研究。
We discuss the mass modifications ofand(and) mesons in nuclear medium. The heavy quark symmetry forand(and) mesons is adopted, and the interaction between aor(or) meson and a nucleon is supplied from the pion exchange. We find negative mass shifts forandmesons, and hence that theandmesons are bound in the nuclear medium. As applications, we consider the atomic nuclei with ameson,and, and investigate the energy levels of themeson in each nucleus. We also discuss the mass shifts in the isospin asymmetric nuclear medium, and present a possible phenomenon of distribution of isospin density around aormeson in nuclear medium. We find that the mass shifts ofandmesons have large imaginary parts, which would prevent precise study of the energy levels ofandmesons in nuclei.