标题： 如何在质子对撞机上搜索轻量级的第三族夸克 显示英文标题

标题： How to Search for a Light Stop at the Tevatron

摘要： 我们描述了一种在费米实验室Tevatron上搜索轻量级停止超夸克的方法 [M(stop)+M(LSP)<M(t)]。传统的搜索方法依赖于严格的背景减少切割，不幸的是，鉴于目前的数据集，这会留下很少的信号事件。为了避免这一困难，我们建议使用较温和的切割集合并结合一个“超级权重”，其目的是区分信号和背景。超级权重由各项之和组成（每一项都是零或一），根据各种可观测量的值逐事件分配。从构造上讲，超级权重对于信号是“大”的，而对于背景是“小”的。我们将这种方法应用于来自顶夸克衰变的停止超夸克的检测。我们的方法很容易适应其他过程。 显示英文摘要

摘要： We describe a method for searching for a light stop squark [M(stop)+M(LSP)<M(t)] at the Fermilab Tevatron. Traditional searches rely upon stringent background-reducing cuts which, unfortunately, leave very few signal events given the present data set. To avoid this difficulty, we suggest using a milder set of cuts, combined with a ``superweight,'' whose purpose is to discriminate between signal and background. The superweight consists of a sum of terms (each of which are either zero or one) assigned event-by-event depending upon the values of various observables. By construction, the superweight ``large'' for the signal and ``small'' for the background. We apply this method to the detection of stops coming from top decay. It is straightforward to adapt our method to other processes.