题 目：Research on hadron spectrum of multi-quark states with chiral unitary approach

报告人：王忠宇（中南大学）

时 间：2021年9月28日 下午 15:00

地 点：理工楼1215

联系人：刘翔

报告摘要：

To understand the nature of two poles for the Λ(1405) state, we revisit the interactions of ¯KN and πΣ with their coupled channels, where two-pole structure is found in the second Riemann sheet. We also dynamically generate two poles in the single channel interaction of ¯KN and πΣ, respectively. Moreover, we make a further study of two poles’ properties by evaluating the couplings, the compositeness, the wave functions, and the radii for the interactions of four coupled channels, two coupled channels and the single channel. We also investigate the scalar resonances in the processes of Ds+ → K+K−π+ and D0 → π0π0π0 , π0π0 η, π0 ηη decays based on the chiral unitary approach for the final state interaction. The resonances f0(500), f0(980) and a0(980) are dynamically produced from the final state interactions of the meson pairs. Furthermore, the branching ratios of each decay channel are predicted.

个人简介：

王忠宇，中南大学物理与电子学院博士后。2011 年本科毕业于吉林大学；2014年于吉林大学获硕士学位；2019 年于中国科学院光电技术研究所获博士学位；2019 年至今在中南大学做博士后。研究方向是使用手征幺正方法研究强子结构与强子衰变。