The nature of light scalar mesons remains an unsolved puzzle in hadron physics, complicated by their large widths and controversial partonic structure. This report will first introduce the debates surrounding the structure of the f0(980). By incorporating the two-pion light-cone distribution amplitudes (2pi-DAs), the report will subsequently elucidate the multi-particle state dominance picture of f0(980) the in the final states of semileptonic charmed meson decays. This picture, along with the simple structure dominance behavior of the f0(980) in meson decays, reveals the diverse emergent phenomena exhibited by light scalar mesons in exclusive processes at different characteristic energy scales. The discussion in this report will closely integrate the latest measurements from the BESIII experiment and traditional cascade decay research approaches.

程山，湖南大学副教授。2015年在南京师范大学获得理学博士学位，随后在德国锡根大学从事博士后研究，2018年入职湖南大学，历任助理教授、副教授。致力于在味物理领域中开展标准模型精确检验的研究，目前的研究兴趣集中在CP破坏、重夸克弱衰变唯象学和轻强子（系统）内部精细结构的描述。