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

这一职业计划的重点是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探测器观察从Wtb顶点产生的单个顶夸克的电弱产生，从而直接测量Cabibbo-Kobayashi-Maskawa矩阵元素Vtb。Vtb的测量在粒子物理学中是非常重要的。它将有助于确保顶夸克具有期望底夸克的SU(2)伙伴所具有的性质。从大背景中提取单顶信号需要非常有效地识别来自底夸克的喷流，并且误认率非常低。这可以通过硅基跟踪系统来实现，该系统目前正在为D0 Run2b升级而开发。首席研究员是该探测器发展的主要贡献者之一。

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.