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arXiv 1109.0127hep-phnucl-th
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组分夸克模型中的强子共振

Hadron Resonances Within a Constituent-Quark Model

R. Kleinhappel, W. Schweiger

摘要:

为了得到更符合实际的强子能谱描述,我们将组分夸克模型推广到介子自由度。由此产生的系统的组成(反)夸克,这是受到一个瞬时的约束力,介子,直接耦合到夸克,被视为通过一个相对论耦合通道框架。它可以正式表明,这样一个系统的质量本征值问题是等价的强子本征值问题,其中的纯禁闭势(裸强子)的本征态通过介子环耦合。按照这种方法,我们计算了一个简单的玩具模型的强子质量和衰变宽度。

英文摘要:

In order to get a more realistic description of the hadron spectrum we extend a constituent-quark model by explicit mesonic degrees of freedom. The resulting system of constituent (anti)quarks, which are subject to an instantaneous confining force, and mesons, which couple directly to the quarks, is treated by means of a relativistic coupled-channel framework. It can be formally shown that the mass-eigenvalue problem for such a system is equivalent to a hadronic eigenvalue problem in which the eigenstates of the pure confinement potential (bare hadrons) are coupled via meson loops. Following this kind of approach we have calculated hadron masses and decay widths for a simple toy model.

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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