Spin degeneracy in multi-hadron systems with a heavy quark
Spin degeneracy in multi-hadron systems with a heavy quark
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DOI：
10.1016/j.physletb.2013.10.019
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发表时间：
2013-04
影响因子：
4.4
通讯作者：
S. Yasui;K. Sudoh;Yasuhiro Yamaguchi;S. Ohkoda;Atsushi Hosaka;Tetsuo Hyodo
中科院分区：
文献类型：
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作者：
S. Yasui;K. Sudoh;Yasuhiro Yamaguchi;S. Ohkoda;Atsushi Hosaka;Tetsuo Hyodo
在重夸克质量极限下，我们研究了具有单个重夸克(魅力或底部)的多强子系统。对于正常强子中已知的j−0，量子数为(j+1/2)P和(j≠1/2)P的态的自旋简并性可以推广到多强子系统。自旋简并是任何具有单一重夸克的多强子系统的普遍现象，无论其内部结构如何，包括致密的多夸克、强子分子和奇异核。我们证明了由重强子有效理论形成的强子系统中的自旋简并：核物质中存在P(⁎)=D(⁎)=D(⁎)，B(⁎)介子和一个核子N的P(⁎)N态，以及一个P(⁎)介子。具有单一重夸克的多强子系统的自旋简并以一种与模型无关的方式为我们提供了关于质量谱、衰变和产生的有用信息。
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≠ 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 (⁎) N states with a P (⁎)= D¯(⁎), B (⁎) meson and a nucleon N, and a P (⁎) meson in nuclear matter. The spin degeneracy in the multi-hadron systems with a single heavy quark provides us with useful information about mass spectra, decays and productions in a model-independent manner.