论文标题
矩阵元素方法作为精确和准确性的工具
The Matrix Element Method as a tool for precision and accuracy
论文作者
论文摘要
矩阵元素方法是一种有希望的多变量分析工具，它提供了一种根据Neyman-Pearson引理进行比较理论和实验的最佳方法。但是，直到最近，它的使用受到了仅能采用领先预测的事实的限制。潜在概率分布的不完善近似可能会引入分析中的显着偏见，该分析需要对该方法进行重大校准，用于应用于参数确定。此外，按比例差异估算理论不确定性可能会产生不可靠的结果。我们将矩阵元素方法扩展到适用于公共喷气算法定义的LHC数据中的QCD中的近代订单。通过模拟由Powheg+Pythia产生的单个顶级事件的顶级质量测定来说明准确性增长。此外，通过模拟与希格斯玻色子（Higgs Boson）相关的单个顶级夸克事件的提取，该方法的BSM参数测定潜力是通过模拟CP侵入式宽川顶耦合来证明的。
The Matrix Element Method is a promising multi-variate analysis tool which offers an optimal approach to compare theory and experiment according to the Neyman-Pearson lemma. However, until recently its usage has been limited by the fact that only leading-order predictions could be employed. The imperfect approximation of the underlying probability distribution can introduce a significant bias into the analysis which requires a major calibration for the method when applied to parameter determination. Moreover, estimating theoretical uncertainties by scale variation may yield unreliable results. We present the extension of the Matrix Element Method to next-to-leading order in QCD applicable to LHC data defined by common jet algorithms. The accuracy gain is illustrated by simulating a top-quark mass determination from single top-quark events generated with POWHEG+PYTHIA. Additionally, the method's potential for BSM parameter determination is demonstrated by simulating the extraction of a CP-violating Top-Yukawa coupling from events of single top-quarks in association with a Higgs boson.
