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arXiv 1007.1053hep-phnucl-th
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L=1激发重子中三体夸克力的检验

Testing for three-body quark forces in L=1 excited baryons

Dan Pirjol, Carlos Schat

摘要:

利用置换群SN讨论了夸克模型与1/Nc展开式有效质量算符的匹配。作为一般过程的一个例子,我们对负宇称L=1激发重子谱进行了Isgur-Karl模型的匹配。在最一般的两体夸克哈密顿量的假设下,我们导出了在任何夸克模型中都成立的两种态的质量和混合角之间的关联。这些相关性限制了混合角,可以用来测试三体夸克力的存在。

英文摘要:

We discuss the matching of the quark model to the effective mass operator of the 1/Nc expansion using the permutation group S_N. As an illustration of the general procedure we perform the matching of the Isgur-Karl model for the spectrum of the negative parity L=1 excited baryons. Assuming the most general two-body quark Hamiltonian, we derive two correlations among the masses and mixing angles of these states which should hold in any quark model. These correlations constrain the mixing angles and can be used to test for the presence of three-body quark forces.

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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