邀请人 (Invited by): 李刚

时间 (Time): 星期二，2023年9月5日，10:00-11:30

地点 (Location): 珠海校区翰林3号楼会议室/zoom会议

摘要 (Abstract): 

I will discuss the role that the rare top decays t-> qll play in the search for new physics. In a large class of Standard Model extensions, existing experimental constraints on new physics in flavor-conserving processes imply strong indirect bounds on new physics contributions to t-> qll. These indirect bounds arise from basic principles of quantum field theory together with a few generic conditions on the UV structure of the theory, and are roughly an order of magnitude stronger than the present experimental bounds on t-> qll. These indirect bounds provide a theoretically-motivated target for experimental searches for t-> qll: violation of the bounds would exclude a large class of new physics models, and would provide nontrivial insight into the UV behavior of the new physics.

主讲人简介 (Speaker's CV): 

Wolfgang Altmannshofer是加州大学圣克鲁兹分校的副教授。2010年，在Andrzej Buras教授的指导下，于慕尼黑工业大学获得博士学位。他先后在费米实验室和圆周率研究所从事博士后研究工作。2016年，他成为辛辛那提大学的助理教授，并于2018年加入加州大学圣克鲁兹分校。他主要从事味物理领域的研究工作，特别是 B 介子的稀有衰变，同时他对其它超出标准模型物理也有广泛的兴趣。