标题： 在sqrt(s) = 1.96 TeV的ppbar碰撞中，利用$b$-标记轻子+喷注事件的运动学拟合测量ttbar产生截面 显示英文标题

标题： Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV Using Kinematic Fitting of $b$-tagged Lepton+Jet Events

摘要： 我们报告了使用费米实验室Tevatron上的CDF II探测器测量ttbar产生截面的结果。 数据包括具有高能电子或缪子、缺失横向能量以及三个或更多强子喷注的事件，其中至少有一个喷注通过重建次级顶点被识别为b夸克喷注。 背景比例由领先喷注的横向能量拟合确定。 使用162+-10 /pb的数据，总截面被测定为6.0+-1.6（统计）+-1.2（系统）pb，这与标准模型预测一致。 显示英文摘要

摘要： We report a measurement of the ttbar production cross section using the CDF II detector at the Fermilab Tevatron. The data consist of events with an energetic electron or muon, missing transverse energy, and three or more hadronic jets, at least one of which is identified as a b-quark jet by reconstructing a secondary vertex. The background fraction is determined from a fit of the transverse energy of the leading jet. Using 162+-10 /pb of data, the total cross section is found to be 6.0+-1.6(stat.)+-1.2(syst.) pb, which is consistent with the Standard Model prediction.