Research in Particle and Accelerator Physics at KEK

香味物理是香味物理学的重要组成部分。这一领域目前正处于复兴时期，来自世界各地许多实验设施的测量结果，包括B工厂，强子对撞机和Charm工厂。 味物理学的一个重要目标是确定Cabibbo小林Maskawa（CKM）混合矩阵的所有元素，CKM混合矩阵是一个复数矩阵，它将六种已知的夸克味（或类型）的电弱相互作用联系起来。 韦恩州立大学小组对CLEO-c中性粲D介子混合的研究做出了重要贡献。 在他们的测量中值得注意的是提取了一个重要的参数，即中性D介子衰变到含有带电K介子和π介子的最终状态时的强相。 该测量对CKM混合角之一（称为伽马）的确定有影响。 该小组计划在日本KEK继续使用BELLE-II研究D衰变，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，并建立在CLEO-c早期获得的专业知识基础上。通过REU/RET计划，该小组的更广泛的影响是相当大的，接触到直接参与研究计划的代表性不足的群体的学生。

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.