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SUMMARY:The |Vub| puzzle: Status and Possible Resolutions
DTSTART:20260915T060000Z
DTEND:20260915T080000Z
DTSTAMP:20261024T141300Z
UID:indico-event-524@napp.fudan.edu.cn
DESCRIPTION:Speakers: 山 程 (湖南大学)\n\n报告摘要：\nConductin
 g precise measurements of the CKM matrix is a primary approach to testing 
 the Standard Model and searching for new physics. Among its elements\, |Vu
 b|\, as the smallest matrix element\, still requires further improvement i
 n measurement precision compared to the others. This talk will first intro
 duce the challenges in measuring |Vub| and some proposed solutions. Subseq
 uently\, it will discuss a strategy for performing independent measurement
 s through the four-body semileptonic decay processes of B meson\, with a p
 articular focus on the two-pion light-cone distribution amplitudes (2π DA
 s). Finally\, the talk will report on the progress in analyzing the B→π
 πlυ decay to extract |Vub| with improved precision\, and discuss how the
  study of Ds→[ππ]Slυ decay serves as a powerful probe to unravel the 
 energy-dependent partonic configurations of the isoscalar f0(980) resonanc
 e and ππ state.\n \n报告人简介：\n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）精细结构的描述。\n \n\n
 https://napp.fudan.edu.cn/event/524/
LOCATION:Institute of Modern Physics
URL:https://napp.fudan.edu.cn/event/524/
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