Is the pentaquark doublet a hadronic molecule?
Is the pentaquark doublet a hadronic molecule?
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DOI：
10.1134/s0021364015170099
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发表时间：
2015-07
期刊：
影响因子：
1.3
通讯作者：
A. Mironov;A. Morozov;A. Morozov
中科院分区：
文献类型：
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作者：
A. Mironov;A. Morozov;A. Morozov
LHCb最近宣布发现一对重叠的五夸克共振，这提出了一个问题，即这种双重结构的起源可能是什么。我们注意到，如果“重子”和“介子”的成分是有色的，而不是无色的，这样的简并就会自然地出现。这是一种吸引人的可能性，也是因为在这种情况下，五夸克态将不会比其他强子更“基本”，并将为本质上新的非阿贝尔化学提供机会。
A recently announced discovery by LHCb of a doublet of overlapping pentaquark resonances poses a question of what can be the origin of this doublet structure. We attract attention to the fact that such degeneracy could naturally arise if constituent “baryon” and “meson” were in the colored, rather than colorless states. This is an appealing possibility, also because in such a case the pentaquark state would be no less “elementary” than the other hadrons, and would provide a chance for essentially new non-Abelian chemistry.