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arXiv 0711.2006hep-phhep-thnucl-th
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大Nc QCD中的激发重子:用置换群S_N将1/Nc展开与夸克模型匹配

Excited Baryons in Large Nc QCD: Matching the 1/Nc expansion to quark models using the permutation group S_N

Dan Pirjol, Carlos Schat

摘要:

我们展示了如何将夸克模型与QCD的1/Nc展开相匹配。作为一个例子,我们详细讨论了轨道激发重子的质量算符,并将其与夸克模型的单胶子交换和单玻色子交换变体相匹配。匹配过程是非常一般的,利用了状态和算符在S_N^{orb} \times S_N^{sp-fl}下的变换性质,S_N ^{sp-fl}是作用于N个夸克的轨道和自旋-味道自由度的置换群。

英文摘要:

We show how to match quark models to the 1/Nc expansion of QCD. As an example we discuss in detail the mass operator of orbitally excited baryons and match it to the one-gluon exchange and the one-boson exchange variants of the quark model. The matching procedure is very general and makes use of the transformation properties of states and operators under S_N^{orb} \times S_N^{sp-fl}, the permutation group acting on the orbital and spin-flavor degrees of freedom of N quarks.

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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