Ernest O. Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Rep Prog Phys. 2012 May;75(5):056201. doi: 10.1088/0034-4885/75/5/056201. Epub 2012 Apr 26.
The top quark is the heaviest of the six quarks of the standard model (SM). Precise knowledge of its mass is important for imposing constraints on a number of physics processes, including interactions of the as yet unobserved Higgs boson. The Higgs boson is the only missing particle of the SM, central to the electroweak symmetry breaking mechanism and generation of particle masses. In this review, experimental measurements of the top quark mass accomplished at the Tevatron, a proton-antiproton collider located at the Fermi National Accelerator Laboratory, are described. Topologies of top quark events and the methods used to separate signal events from background sources are discussed. Data analysis techniques used to extract information about the top mass value are reviewed. The combination of several of the most precise measurements performed with the two Tevatron particle detectors, CDF and DØ, yields a value of M(t) = 173.2 ± 0.9 GeV/c(2).
顶夸克是标准模型（SM）六种夸克中最重的一个。精确了解其质量对于限制许多物理过程非常重要，包括尚未观测到的希格斯玻色子的相互作用。希格斯玻色子是 SM 中唯一缺失的粒子，是电弱对称破缺机制和粒子质量产生的核心。在这篇综述中，描述了在费米国家加速器实验室的质子-反质子对撞机 Tevatron 上完成的顶夸克质量的实验测量。讨论了顶夸克事件的拓扑结构以及用于将信号事件与背景源分离的方法。还回顾了用于提取有关顶夸克质量值信息的数据分析技术。使用两个 Tevatron 粒子探测器 CDF 和 DØ 进行的一些最精确测量的组合，得出了 M(t) = 173.2 ± 0.9 GeV/c(2) 的值。
