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arXiv 0704.1345hep-ph
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奇异Ds介子的三夸克结构和同位旋对称性破缺

Triquark structure and isospin symmetry breaking in exotic Ds mesons

S. Yasui, M. Oka

摘要:

色反三重态三夸克态$q\bar{q}\bar{q}$被认为是奇异$D_{s}$介子四夸克态结构$cq\bar{q}\bar{q}$中的一个致密组分.利用瞬子诱导相互作用和单胶子交换势讨论了三夸克态的质量谱和味混合。作为三夸克态的一个特征性质,我们研究了三夸克态的同位旋破坏。结果表明,味态$\bar{\bf 3}$(等单线态)和$\bf 6$(等三线态)可以很强地混合,然后用$D_{s}(2632)$识别.

英文摘要:

The color anti-triplet triquark $q\bar{q}\bar{q}$ is considered as a compact component in the tetraquark structure $cq\bar{q}\bar{q}$ of exotic $D_{s}$ mesons. We discuss the mass spectrum and the flavor mixing of the triquarks by using the instanton induced interaction and the one-gluon exchange potentials. As a characteristic property of the triquark, we investigate the isospin violation. It is shown that the flavor $\bar{\bf 3}$ (isosinglet) and $\bf 6$ (isotriplet) states may be strongly mixed and then are identified with $D_{s}(2632)$.

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。

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