From Symmetries to Asymmetries -- Testing Fundamental Physics at LHCb
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https://meeting.tencent.com/dm/R7rKrZjSkwC0
#腾讯会议:740-743-371
北京大学高能物理中心B105
Abstract: Every symmetry implies testable relations between physical processes, while its violation can manifest itself as an observable asymmetry. From the discovery of P and CP violation to the establishment of the CKM theory, this principle has driven the development of flavour physics and continues to guide precision measurements at LHCb.
I will present several recent measurements spanning flavour and electroweak physics: W^± boson production and the muon charge asymmetry; the first measurement of the forward top-quark charge asymmetry; the precision measurements of Z boson mass and effective weak mixing angle; the first evidence for direct CP violation in a b →d transitions through B_s^0→K^+ K^- K^+ π^- and B^+→J/ψ π^+ ; CP violation in the penguin-dominated process (B^+→K_S^0 h^± ); and a stringent test of CPT symmetry in the B_s^ system through B_s^0→D_s^- π^+. Together, these measurements show how asymmetries provide sensitive probes of different underlying mechanisms.
Biography: 报告人于2005年和2010年先后获得山东师范大学学士学位和中国科学技术大学博士学位。2010至2015年,在美国费米国家加速器实验室从事博士后研究。2015年入选国家级青年人才项目,并加入华中师范大学。
报告人长期参与LHCb国际合作实验,主要从事强子对撞机精确测量。近2年来,在PRL发表论文5篇,取得多项研究成果,包括:首次在底介子衰变至K^+ K^- K^+ π^-、粲偶素中发现直接CP破坏证据(分别为4.0σ和3.2σ);精确测量圈图主导过程(B^+→K_S^0 h^± )的CP破坏;精确测量Z玻色子质量、弱混合角、W玻色子电荷不对称性,获得前向区域最精确结果;在前向区域精确测量顶夸克电荷不对称性(2.6σ),为精确检验QCD高阶计算提供了实验输入。
报告人多次在国际会议作大会报告,并多次担任国际会议分会主持人。2025年受邀担任《Nature》审稿人,负责审核CMS W质量测量结果;并受邀担任欧洲研究委员会(ERC)项目通讯评审专家。2023至2025年担任LHCb QCD-电弱-新物理工作组召集人;2025年起任LHCb在CERN LPCC-Top物理组联络人。