Testing of the ATLAS Trigger System and Development of Data Analysis Techniques for the Investigion of the properties of the Top Quark

必须在ATLAS实验范围内完成的研究是双重的。一方面，我将不得不参与ATLAS探测器性能的测试和优化。在这方面，我将通过测试新的电子模块，负责从电磁量热计的液态氩传感器收集的信息中识别电子，光子和taus，并辅以强子量热计的信息，来帮助升级探测器的1级量热计触发系统。这些新模块（称为eFEX -电子特征提取器）正在生产中，将由专用测试模块（FTM）进行测试，该模块将向eFEX提供信号并测量其响应。FTM必须单独进行测试，因为它们必须处理大量的信息（12千兆位/秒的数量级）。作为我博士研究的第二部分，我必须为高能物理主题的探索做出贡献，在我的情况下，是顶级夸克物理部门。伯明翰大学目前正在研究的性质主要是ATLAS中质子-质子碰撞产生顶夸克和反夸克对的所谓电荷不对称性和自旋相关性。这些物理量对于在LHC中寻找新的物理学很重要。有几个模型预测在TeV能量范围内存在衰变为顶夸克的重色共振。这种共振的产生可能会产生相当大的顶夸克与反顶夸克的电荷不对称性。我将为数据分析技术的发展做出贡献，以确定顶夸克性质是否存在与标准模型预测的重大偏差，这表明新物理学。

The research that has to be completed in the context of the ATLAS experiment is twofold. On one part, I will have to get involved with the testing and optimization of ATLAS detector performance. In that context, I will contribute to the upgrade of the Level 1 Calorimeter Trigger system of the detector, by testing the new electronic modules responsible for the identification of electrons, photons and taus from information collected by the Liquid Argon sensors of the electromagnetic calorimeter, supplemented by information from the hadronic calorimeter as well. These new modules (called eFEX - electron Feature Extractors) are now being produced, and are going to be tested by dedicated Testing Modules (FTM) which will feed signals to the eFEX's, and measure their response. The FTM's have to be tested separately, having in mind the enormous volume of information (order of 12 Gigabit/s) that they will to have to handle.One the second part of my PhD research, I will have to contribute to the exploration of a High Energy Physics topic, in my case the Top Quark Physics sector. The properties that are currently under investigation by the University of Birmingham are primarily the so called Charge Asymmetry and Spin Correlation in the production of top quark and antiquark pairs from proton-proton collisions in ATLAS. These quantities are important in the search of new physics in the LHC. There are several models that predict the existence of heavy coloured resonances decaying to top quarks in the TeV energy range. The production of such resonances might generate a sizable charge asymmetry of top versus antitop quarks. I am going to contribute to the development of Data Analysis techniques, in order to identify if significant deviation from the Standard Model predictions, indicative of new physics, exists in the Top Quark properties.