CAREER: A Precision Measurement of the Top Quark Mass

这是一项进行实验高能物理研究的提议，旨在阐明物质的基本相互作用。它的最终目标是用一个统一的理论来描述所有基本的相互作用。然而，目前我们只能用一种基本理论来描述电磁和弱相互作用，当它与一种叫做量子色动力学的强相互作用的启发式理论结合在一起时，就构成了所谓的夸克和轻子的标准模型。最近发现的顶夸克的性质——尤其是它巨大的质量——是这些理论必须解释的参数。费米实验室的Tevatron是目前实验室中唯一一个有足够能量产生顶夸克的加速器。这个建议是使用即将到来的Tevatron Run II的数据来执行顶夸克质量的精确测量。该测量的精度现在受到喷射能量刻度校准系统不确定度的限制。为了减少这种不确定性，提出的工作是使用衰减zb -bar来校准射流能量标度。这涉及到重建算法的开发，以识别b夸克喷流，以及硅轨道触发处理器的设计和构建，该处理器将允许触发b夸克事件。

This is a proposal to conduct research in experimental high energy physics, which seeks to elucidate the fundamental interactions of matter. Its ultimate goal is to describe all the fundamental interactions by a single unified theory. However, at this time we can describe only the electromagnetic and weak interactions with a fundamental theory, which when coupled with a heuristic theory of the strong interactions called Quantum Chromodynamics, constitute the so-called Standard Model of Quarks and Leptons. The properties of the recently discovered top quark - especially its large mass - are parameters that such theories have to explain. The Tevatron at Fermilab is the only accelerator currently running with enough energy to produce top quarks in the laboratory. This proposal is to use the data from the upcoming Tevatron Run II to perform a precision measurement of the top quark mass. The precision of this measurement is now limited by the systematic uncertainty in the jet energy scale calibration. To reduce this uncertainty, the work proposed is to use the decay Z b b-bar to calibrate the jet energy scale. This involves development of reconstruction algorithms to identify b-quark jets and the design and construction of a silicon track trigger processor that will allow triggering on events with b quarks.