一、報(bào)告題目

  |Vub |疑難和B介子四體半輕衰變研究

二、報(bào)告人

程山

三、報(bào)告時(shí)間

5月11日（周日）下午16:00-17:00

四、報(bào)告地點(diǎn)

蓮花街校區(qū)惟德樓物理學(xué)院307會(huì)議室

五、報(bào)告人簡(jiǎn)介

程山，湖南大學(xué)副教授。2015年在南京師范大學(xué)獲得理學(xué)博士學(xué)位，隨后在德國(guó)錫根大學(xué)從事博士后研究，2018年入職湖南大學(xué)，歷任助理教授、副教授。致力于在味物理領(lǐng)域中開(kāi)展標(biāo)準(zhǔn)模型精確檢驗(yàn)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(xué)和輕強(qiáng)子（系統(tǒng)）內(nèi)部結(jié)構(gòu)的描述。

六、報(bào)告內(nèi)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→ππl(wèi)υ process and recent results on extracting |V_ub | at a higher precision level.

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物理學(xué)院
2025年5月8日