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A, Zaw I, Zetti F, Zhang X, Zhou J, Zucchelli S
University of Illinois, Urbana, Illinois 61801, USA.
Phys Rev Lett. 2006 May 26;96(20):202002. doi: 10.1103/PhysRevLett.96.202002. Epub 2006 May 23.
We present a measurement of the tt production cross section in pp collisions at square root s = 1.96 TeV which uses events with an inclusive signature of significant missing transverse energy and jets. This is the first measurement which makes no explicit lepton identification requirements, so that sensitivity to W --> tau nu decays is maintained. Heavy flavor jets from top quark decay are identified with a secondary vertex tagging algorithm. From 311 pb(-1) of data collected by the Collider Detector at Fermilab, we measure a production cross section of 5.8 +/- 1.2(stat)(-0.7)(+0.9)(syst) pb for a top quark mass of 178 GeV/c2, in agreement with previous determinations and standard model predictions.
我们给出了在(\sqrt{s}=1.96) TeV的质子-质子碰撞中(t\bar{t})产生截面的测量结果，该测量使用了具有显著缺失横向能量和喷注的包容性特征的事件。这是首次不做明确轻子识别要求的测量，从而保持了对(W\to\tau\nu)衰变的敏感性。通过二次顶点标记算法识别来自顶夸克衰变的重味喷注。利用费米实验室对撞机探测器收集的311 pb⁻¹数据，对于顶夸克质量为178 GeV/c²，我们测量的产生截面为(5.8\pm1.2)（统计）(^{-0.7})(^{+0.9})（系统）pb，与先前的测定和标准模型预测一致。
