Description of SU(3) S wave and P wave baryons
Description of SU(3) S wave and P wave baryons
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DOI：
10.1103/physrevc.68.034001
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发表时间：
2003-09
影响因子：
3.1
通讯作者：
M. Furuichi;K. Shimizu;S. Takeuchi
中科院分区：
文献类型：
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作者：
M. Furuichi;K. Shimizu;S. Takeuchi
本文利用组分手征夸克模型研究了SU（3）八重态和十重态重子的结构。我们求解了具有多个距离高斯基的三夸克系统的基态和s波、p波激发态。我们在这里使用的这种方法，已经被证明可以很好地描述SU（3）s波重子的结构。在本工作中，我们将我们的研究扩展到包含张量项的SU（3）p波重子。发现正负宇称态的质量差可以很好地再现。研究还发现，赝标介子交换势对降低核子共振${N}^{*}（1440）$（罗珀）质量起着重要作用.我们还讨论了半相对论方法在手征夸克模型中的作用，以及如何在半相对论方法中一致地处理势项。
We investigate the structure of the SU(3) octet and decuplet baryons employing a constituent chiral quark model. We solve the ground and s- and p-wave excited states of the three-quark system with many range Gaussian bases. This method, which we employ here, has been shown to work quite nicely to describe the structure of the SU(3) s-wave baryons. In this work, we extend our research to the SU(3) p-wave baryons including the tensor term. It is found that the mass differences between positive and negative parity states are well reproduced. It is also found that the pseudoscalar (ps) meson exchange potential plays a very important role to lower the mass of the nucleon resonance ${N}^{*}(1440)$ (Roper). We also discuss how the semirelativistic approach works in the chiral quark model and how to treat the potential terms consistently in the semirelativistic approach.