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arXiv 0909.5531nucl-th
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手征动力学中共振的起源

Origin of resonances in chiral dynamics

Tetsuo Hyodo, Daisuke Jido, Atsushi Hosaka

摘要:

用动力学手征耦合道方法研究了介子-重子散射中重子共振的性质。一般来说,两体散射中共振的起源可以分为两类:动力学产生的态和真正的基本粒子。我们证明,真正的贡献,在循环函数可以排除通过采用一个自然的重整化方案。共振的起源可以通过观察自然重整化方案中的有效相互作用来研究,该方案是从拟合到实验数据的唯象振幅推导出来的。应用这种方法的重子共振,我们发现,主要成分的λ(1405)共振是动态的,而真正的贡献起着重要作用的N(1535)的结构。

英文摘要:

The nature of baryon resonances is studied in the dynamical chiral coupled-channel approach for meson-baryon scattering. In general, origin of resonances in two-body scattering can be classified into two categories: dynamically generated states and genuine elementary particles. We demonstrate that the genuine contribution in the loop function can be excluded by adopting a natural renormalization scheme. The origin of resonances can be studied by looking at the effective interaction in the natural renormalization scheme, which is deduced from the phenomenological amplitude fitted to experimental data. Applying this method to the baryon resonances, we find that the dominant component for the Lambda(1405) resonance is dynamical, while a genuine contribution plays a substantial role for the structure of the N(1535).

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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