arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1304.5293hep-phnucl-th
收藏

含重夸克的多强子系统的自旋简并

Spin degeneracy in multi-hadron systems with a heavy quark

S. Yasui, K. Sudoh, Y. Yamaguchi, S. Ohkoda, A. Hosaka, T. Hyodo

摘要:

在重夸克质量的极限下,研究了含有单个重夸克(粲夸克或底夸克)的多强子系统。在正常强子中已知的量子数为$j \neq 0$和$(j-1/2)^{P}$的态的自旋简并度可以推广到多强子系统。自旋简并是任何含有一个重夸克的多强子系统的普遍现象,无论它们的内部结构如何,包括紧致多夸克、强子分子和奇异核。本文用重强子有效理论证明了在核物质中含有$P^{(\ast)}=\bar{D}^{(\ast)}$、$B^{(\ast)}$介子和一个核子$N$以及一个$P^{(\ast)}$介子的$P^{(\ast)}N$态的强子系统的自旋简并。

英文摘要:

We study multi-hadron systems with a single heavy quark (charm or bottom) in the limit of heavy quark mass. The spin degeneracy of the states with quantum numbers $(j+1/2)^{P}$ and $(j-1/2)^{P}$ for $j \neq 0$, known in a normal hadron, can be generalized to multi-hadron systems. The spin degeneracy is the universal phenomena for any multi-hadron systems with a single heavy quark, irrespective of their internal structures, including compact multi-quarks, hadronic molecules and exotic nuclei. We demonstrate the spin degeneracy in the hadronic systems formed by a heavy hadron effective theory; $P^{(\ast)}N$ states with a $P^{(\ast)}=\bar{D}^{(\ast)}$, $B^{(\ast)}$ meson and a nucleon $N$, and a $P^{(\ast)}$ meson in nuclear matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑