CAREER: Direct Measurement of the CKM Matrix Element Vtb at the Tevatron

这项职业计划侧重于对顶夸克产生机制的详细研究，特别是试图用费米实验室Tevatron的D0探测器观测单个顶夸克从WTB顶点产生的电弱，从而直接测量Cabibbo-Kobayashi-Maskawa矩阵元素VTB。VTB的测量对于粒子物理来说是非常重要的。这将有助于确保顶夸克具有底夸克的SU(2)伙伴所期望的性质。从大背景中提取单顶信号需要非常有效地识别源自底部夸克的喷流，并且误识率非常低。这可以通过基于硅的跟踪系统来实现，该系统目前正在为D0 Run2b升级而开发。首席调查员是开发这一探测器的主要贡献者之一。

This CAREER proposal focuses on detailed studies of the production mechanisms of the top quark, in particular in attempting to observe, with the D0 detector at the Fermilab Tevatron, the electroweak production of a single top quark from a Wtb vertex and, hence, to measure the Cabibbo-Kobayashi-Maskawa matrix element, Vtb, directly. The measurement of Vtb is very important to particle physics. It will help assure that the top quark has the properties that are expected of the SU(2) partner of the bottom quark. Extracting a single-top signal from a large background requires a very efficient identification of jets originating from a bottom quark, with a very low rate of mis-identification. This can be achieved with a silicon-based tracking system, now being developed for the D0 Run2b upgrade. The Principal Investigator is one of the major contributors to the development of this detector.