论文标题
QCD和奇怪的Baryon光谱
QCD and the Strange Baryon Spectrum
论文作者
论文摘要
奇怪的夸克在QCD中起着独特的作用，反映了其在光和重夸克之间的中间质量。近年来，在具有陌生的重子的光谱中取得了显着进步。通过新颖的技术的精确实验数据以及理论框架的系统发展，以描述强子共振，已经揭示了奇怪的重子频谱的许多新特征。奇怪的重子的基本特性，即，杆位置，自旋和奇偶校验和衰减分支比率得到了准确确定。结果，粒子数据组在粒子列表中添加了新条目，例如$λ（1380）$和$ω（2012）$。光谱学的发展刺激了关于普通三夸克构型奇怪的巴属的外来内部结构的深入讨论。在这篇综述中，我们介绍了QCD的基础知识，散射理论和Hadron的异国内部结构，强调了散射幅度对强子共振的表征的极端位置的重要性。然后，我们总结了选定的奇怪巴里昂共鸣的当前状态； $λ（1405）$，$λ（1670）$，$ξ（1620）$，$ξ（1690）$和$ω（2012）$，从理论和实验视图中。
The strange quark plays a unique role in QCD, reflecting its intermediate mass between the light and heavy quarks. In recent years, remarkable progress has been made in the spectroscopy of baryons with strangeness. Many new features of the strange baryon spectrum have been revealed by accurate experimental data with novel techniques, as well as systematic developments of theoretical framework to describe hadron resonances. The basic properties of strange baryons, namely, the pole positions, spin and parity, and decay branching ratios, are being determined accurately. As a consequence, the Particle Data Group have added new entries in the particle listings, such as the $Λ(1380)$ and the $Ω(2012)$. The developments of the spectroscopy stimulate intensive discussion on the exotic internal structure of strange baryons beyond the ordinary three-quark configuration. In this review, we introduce the basics of QCD, the scattering theory, and the exotic internal structure of hadrons, emphasizing the importance of the pole positions of the scattering amplitude for the characterization of hadron resonances. We then summarize the current status of selected strange baryon resonances; $Λ(1405)$, $Λ(1670)$, $Ξ(1620)$, $Ξ(1690)$, and $Ω(2012)$, from theoretical and experimental viewpoints.
