The axial current in QCD plays a crucial role in understanding low-energy strong interactions, as it couples to both pseudoscalar mesons and axial-vector mesons. While the former case has been widely studied, theoretical and experimental investigations of the latter remain relatively poor. In this talk, I focus on the structure of the isovector (I=1,JPC=1++) axial-vector meson. By analyzing the peak structure around 1.4 GeV in the f0(980)π invariant mass spectrum in the process πp→pf0(980)π, as well as the dip structure near 1.4 GeV in the ρπ invariant mass spectrum in γp→n3π, I find evidence that supports identifying the a1(1420) as a molecular candidate of K∗K¯. This interpretation suggests a1(1420) acts as the flavor partner of the Wc1, providing insight into the nature of axial-vector mesons and their role in strong interactions.

Biography

严茂俊，2019年毕业于ld体育网页端 ，随后在北京航空航天大学和ld体育网页端 从事博士后研究，2024年入职西南大学；主要从事低能强相互作用理论，奇特强子态和强子谱学中的运动学奇异性等方面研究。

Inviter: Feng-Kun Guo