一、報告題目

  |Vub |疑難和B介子四體半輕衰變研究

二、報告人

程山

三、報告時間

5月11日（周日）下午16:00-17:00

四、報告地點

蓮花街校區惟德樓物理學院307會議室

五、報告人簡介

程山，湖南大學副教授。2015年在南京師范大學獲得理學博士學位，隨后在德國錫根大學從事博士后研究，2018年入職湖南大學，歷任助理教授、副教授。致力于在味物理領域中開展標準模型精確檢驗的研究，目前的研究興趣集中在CP破壞、重夸克弱衰變唯象學和輕強子（系統）內部結構的描述。

六、報告內容

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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物理學院
2025年5月8日