一、报告题目
|Vub |疑难和B介子四体半轻衰变研究
二、报告人
程山
三、报告时间
5月11日（周日）下午16:00-17:00
四、报告地点
莲花街校区惟德楼物理学院307会议室
五、报告人简介
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）内部结构的描述。
六、报告内容
The CKM matrix is a crucial component of the particle physics Standard Model, describing the transitions between quark fields of different flavors. Conducting precise measurements of the CKM matrix is a primary approach to testing the Standard Model and searching for new physics. Among its elements, |V_ub |, as the smallest matrix element, still requires further improvement in measurement precision compared to the others.
This talk will first introduce the challenges in measuring |V_ub | and some proposed solutions. Subsequently, it will discuss a strategy for performing independent measurements through the four-body semileptonic decay processes of B meson, with a particular focus on the two-pion light-cone distribution amplitudes (Dipion LCDAs). Finally, the talk will present the research progresses of the B→ππlυ process and recent results on extracting |V_ub | at a higher precision level.
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物理学院
2025年5月8日
