标题： 标准模型及之外的ttbar不对称性 显示英文标题

标题： The ttbar asymmetry in the Standard Model and beyond

摘要： 在顶夸克对产生中观察到了显著的电荷不对称性。 实验结果似乎系统地超过了标准模型理论预测的大量，并引发了大量关于“新物理”的建议。 该效应在大型强子对撞机上也可见，ATLAS和CMS合作组已经提出了初步结果。 在本次报告中，我们回顾了理论预测的现状及其与实验测量的比较。 显示英文摘要

摘要： A sizable charge asymmetry in top quark pair production has been observed at the Tevatron. The experimental results seem to exceed systematically the Standard Model theory predictions by a significant amount and have triggered a large number of suggestions for 'new physics'. The effect is also visible at the LHC, and preliminary results have already been presented by the ATLAS and CMS collaborations. In this talk, we review the present status of the theoretical predictions, and their comparison with the experimental measurements.