Research in Particle and Accelerator Physics at KEK

KEK 的粒子和加速器物理研究

• 批准号: 1205549
• 负责人: Giovanni Bonvicini
• 金额: $ 12万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205549&HistoricalAwards=false
• 关键词: Research; Particle; Accelerator; Physics; KEK

Charm physics is an important component of the field of flavor physics. This field is currently in a renaissance with significant results coming from measurements at a number of experimental facilities worldwide, including B-factories, Hadron Colliders, and Charm factories. An important objective in flavor physics is the determination of all of the elements of the Cabibbo Kobayashi Maskawa (CKM) mixing matrix, which is a matrix of complex numbers that relates the electroweak interactions of the six known flavors (or types) of quarks. The Wayne State University group has made significant contributions to the study of the mixing of neutral charm D mesons at CLEO-c. Notable among their measurements is the extraction of an important parameter known as the strong phase in decays of neutral D mesons into final states containing charged Kaons and Pions. This measurement has impact on the determination of one of the CKM mixing angles called gamma. The group plans to continue the study of D decays with BELLE-II at KEK in Japan and is exploring a new test of CP violation in D decays. Additionally at BELLE-II, the group intends to study rare decays of D mesons, looking for 4 quark content, and building upon earlier expertise gained at CLEO-c. The broader impacts efforts of the group are considerable through REU/RET programs, reaching students from underrepresented groups who participate directly in the research program.

魅力物理是风味物理领域的重要组成部分。这一领域目前正处于复兴阶段，世界各地许多实验设施的测量都取得了重大成果，其中包括B工厂、强子对撞机和魅力工厂。味物理中的一个重要目标是确定Cabibbo Kobayashi Maskawa(CKM)混合矩阵的所有元素，CKM是一个复数矩阵，与已知的六种口味(或类型)夸克的电弱相互作用有关。韦恩州立大学的研究小组在研究CLEO-c中性Charm D介子的混合方面做出了重大贡献。值得注意的是，在他们的测量中，提取了一个重要的参数，即中性D介子衰变到包含带电介子和介子的终态的强相。这种测量对CKM混合角之一伽马的测定有影响。该小组计划在日本KEK用Belle-II继续对D衰变的研究，并正在探索D衰变中CP破坏的新测试。此外，在Belle-II，该小组打算研究D介子的罕见衰变，寻找4夸克含量，并在CLEO-c获得的早期专业知识的基础上再接再厉。通过REU/RET计划，该小组的努力产生了相当大的广泛影响，直接参与研究计划的学生来自代表性不足的群体。